D a t a S he et , R e v . 1 . 4 , M a i 2 0 0 8 B T S 5 2 4 1 -2 L Smart High-Side Power Switch P R O FE T A u to m o t i v e P o w e r Smart High-Side Power Switch BTS5241-2L Table of Contents 1 1.1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 2.1 2.2 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin Assignment BTS5241-2L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 3.1 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 4.1 4.1.1 4.1.2 4.1.3 4.1.4 4.2 4.2.1 4.2.2 4.2.3 4.2.4 4.2.5 4.3 4.3.1 4.3.2 4.3.3 4.3.4 Block Description and Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Power Stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Output On-State Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Input Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Inductive Output Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Protection Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Over-Load Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Reverse Polarity Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Overvoltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Loss of Ground Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 ON-State Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 OFF-State Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Sense Enable Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5 Package Outlines BTS5241-2L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Data Sheet 2 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch PROFET BTS5241-2L Overview Basic Features * * * * * * * * * Very low standby current 3.3 V and 5 V compatible logic pins Improved Electromagnetic Compatibility (EMC) Stable behavior at Undervoltage Logic ground independent from load ground Secure load turn-off while logic ground disconnected Optimized inverse current capability Green Product (RoHS compliant) AEC Qualified PG-DSO-12-9 Description The BTS5241-2L is a dual channel high-side power switch (two times 25 m) in PG-DSO-12-9 power package providing embedded protective functions. The Enhanced IntelliSense pins IS1 and IS2 provide a sophisticated diagnostic feedback signal including current sense function and open load in off state. The diagnosis signals can be switched on and off by the sense enable pin SEN. An integrated ground resistor as well as integrated resistors at each input pin (IN1, IN2, SEN) reduce external components to a minimum. The power transistor is built by a N-channel vertical power MOSFET with charge pump. The inputs are ground referenced CMOS compatible. The device is monolithically integrated in Smart SIPMOS technology. Product Summary Operating voltage Vbb(on) 4.5 .. 28 V Overvoltage protection Vbb(AZ) 41 V On-State resistance (Tj = 150 C) RDS(ON) 50 m Nominal load current (one channel active) 5.7 A Current limitation repetitive IL(nom) IL(LIM) IL(SCr) Stand-by current for whole device with load Ibb(OFF) 7.5 A Current limitation 40 A 9.5 A Type Package Marking BTS5241-2L PG-DSO-12-9 BTS5241-2L Data Sheet 3 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Protective Functions * * * * * * * * * Reverse battery protection without external components Short circuit protection Over-load protection Multi-step current limitation Thermal shutdown with restart Thermal restart at reduced current limitation Overvoltage protection without external resistor Loss of ground protection Electrostatic discharge protection (ESD) Diagnostic Functions * * * * * Enable function for diagnosis pins (IS1 and IS2) Proportional load current sense signal by current source Open load detection in ON-state by load current sense Open load detection in OFF-state by voltage source Feedback on Overtemperature and current limitation in ON-state Applications * * * * C compatible high-side power switch with diagnostic feedback for 12 V grounded loads All types of resistive, inductive and capacitive loads Most suitable for loads with high inrush currents, so as lamps Replaces electromechanical relays, fuses and discrete circuits Data Sheet 4 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Block DiagramTerms 1 Block Diagram VBB channel 1 load current sense internal power supply logic open load detection IN1 ESD protection IS1 gate control & charge pump clamp for inductive load multi step load current limitation temperature sensor SEN OUT1 channel 2 control and protection circuit equivalent to channel 1 IN2 IS2 OUT2 R GND GND Figure 1 Block Diagram 1.1 Terms Following figure shows all terms used in this data sheet. Vbb Ibb IIN1 IIN2 VIN1 VIN2 IIS1 IIS2 VIS1 VIS2 ISEN IN1 VBB IN2 IS1 OUT1 BTS5241-2L V DS1 VOUT1 OUT2 IS2 SEN I L1 I L2 V DS2 V OUT2 GND VSEN IGND Terms2ch.emf Figure 2 Terms Channel related symbols without channel number are valid for each channel separately. Data Sheet 5 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Pin ConfigurationPin Assignment BTS5241-2L 2 Pin Configuration 2.1 Pin Assignment BTS5241-2L (top view) GND 1 12 VBB IN1 2 11 OUT1 IS1 3 10 OUT1 IS2 4 9 OUT2 IN2 5 8 OUT2 VBB 6 7 SEN heat slug (VBB) Figure 3 Pin Configuration PG-DSO-12-9 2.2 Pin Definitions and Functions Pin Symbol I/O Function 2 IN1 I Input signal for channel 1 5 IN2 I Input signal for channel 2 3 IS1 O Diagnosis output signal channel 1 4 IS2 O Diagnosis output signal channel 2 7 SEN I Sense Enable input for channel 1&2 10,11 OUT1 O Protected high-side power output channel 11) 8, 9 OUT2 O Protected high-side power output channel 21) 1 GND - Ground connection 6,12, heat slug VBB - Positive power supply for logic supply as well as output power supply 1) All output pins of a channel have to be connected together on the PCB. PCB traces have to be designed to withstand the maximum current which can flow Data Sheet 6 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Electrical CharacteristicsMaximum Ratings 3 Electrical Characteristics 3.1 Maximum Ratings Stresses above the ones listed here may cause permanent damage to the device. Exposure to maximum rating conditions for extended periods may affect device reliability. Tj = 25 C (unless otherwise specified) Pos. Parameter Symbol Limit Values min. max. Unit Test Conditions Supply Voltage Vbb 3.1.1 Supply voltage -16 28 V 3.1.2 Supply voltage for short circuit protection (single Vbb(SC) pulse) (Tj = -40C .. 150C) 0 28 V 3.1.3 Voltage at power transistor - 52 V 3.1.4 Supply Voltage for Load Dump protection VDS Vbb(LD) - 53 V RI = 2 2) RL = 6.8 IL EAS - IL(LIM) A 3) - 0.13 J 4) L = 8 H R = 0.2 1) Power Stages 3.1.5 Load current 3.1.6 Maximum energy dissipation per channel (single pulse) 3.1.7 Total power dissipation (DC) for whole device IL(0) = 5.5 A Tj(0) = 150C Vbb=12V Ptot - 2.0 W 5) Ta = 85 C Tj 150 C Logic Pins 3.1.8 3.1.9 Voltage at input pin Current through input pin 3.1.10 Voltage at sense enable pin 3.1.11 Current through sense enable pin 3.1.12 Current through sense pin VIN -5 -16 19 IIN -2.0 -8.0 2.0 VSEN -5 -16 19 ISEN -2.0 -8.0 2.0 IIS -25 10 mA Tj -40 150 C - 60 C -55 150 C -1 -2 -4 1 2 4 V t 2 min. mA t 2 min. V t 2 min. mA t 2 min. Temperatures 3.1.13 Junction temperature 3.1.14 Dynamic temperature increase while switching Tj Tstg 3.1.15 Storage temperature ESD Susceptibility VESD 3.1.16 ESD susceptibility HBM IN, SEN IS OUT Data Sheet 7 kV according to EIA/JESD 22-A 114B Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Electrical CharacteristicsMaximum Ratings 1) R and L describe the complete circuit impedance including line, contact and generator impedances 2) Load Dump is specified in ISO 7637, RI is the internal resistance of the Load Dump pulse generator 3) Current limitation is a protection feature. Operation in current limitation is considered as "outside" normal operating range. Protection features are not designed for continuous repetitive operation. 4) Pulse shape represents inductive switch off: IL(t) = IL(0) * (1 - t / tpeak); 0 < t < tpeak 5) Device mounted on PCB (50 mm x 50 mm x 1.5mm epoxy, FR4) with 6 cm2 copper heatsinking area (one layer, 70 m thick) for Vbb connection. PCB is vertical without blown air. Data Sheet 8 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Block Description and Electrical CharacteristicsPower Stages 4 Block Description and Electrical Characteristics 4.1 Power Stages The power stages are built by a N-channel vertical power MOSFET (DMOS) with charge pump. 4.1.1 Output On-State Resistance The On-state resistance RDS(ON) depends on the supply voltage as well as the junction temperature Tj. Figure 4 shows these dependencies for the typical On-state resistance. The On-state resistance in reverse polarity mode is described in Section 4.2.2. Tj = 35 140 30 120 RDS(ON) /m RDS(ON) /m Vbb = 25 20 100 80 60 40 15 20 10 -50 -25 0 25 50 75 100 125 150 T /C Figure 4 Typical On-State Resistance 4.1.2 Input Circuit 0 5 10 15 Vbb /V 20 25 Figure 5 shows the input circuit of the BTS5241-2L. There is an integrated input resistor that makes external components obsolete. The current source to ground ensures that the device switches off in case of open input pin. The zener diode protects the input circuit against ESD pulses. IN RIN IIN internal ground RGND GND Input.emf Figure 5 Input Circuit (IN1 and IN2) A high signal at the input pin causes the power DMOS to switch on with a dedicated slope, which is optimized in terms of EMC emission. IN VOUT tON tOFF t 90% 70% 70% 30% dV / dtOFF dV / dtON 30% 10% t Figure 6 Data Sheet SwitchOn.emf Switching a Load (resistive) 9 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Block Description and Electrical CharacteristicsPower Stages 4.1.3 Inductive Output Clamp When switching off inductive loads with high-side switches, the potential at pin OUT drops below ground potential, because the inductance intends to continue driving the current. V bb VBB IL OUT V OUT GND L, RL OutputClamp .emf Figure 7 Output Clamp (OUT1 and OUT2) To prevent destruction of the device, there is a voltage clamp mechanism implemented that keeps that negative output voltage at a certain level (VOUT(CL)). See Figure 7 and Figure 8 for details. Nevertheless, the maximum allowed load inductance is limited. V OUT IN = 5V IN = 0V Vbb t V OUT(CL) IL t Figure 8 InductiveLoad.emf Switching an Inductance Maximum Load Inductance While demagnetization of inductive loads, energy has to be dissipated in the BTS5241-2L. This energy can be calculated with following equation: - V OUT(CL) RL IL L - ln 1 + ------------------------E = ( V bb + V OUT(CL) ) --------------------------- + I L ------RL RL V OUT(CL) Following equation simplifies under the assumption of RL = 0: V bb 2 1 E = --- LI L 1 + ------------------------ 2 V OUT(CL) The energy, which is converted into heat, is limited by the thermal design of the component. See Figure 9 for the maximum allowed energy dissipation. Data Sheet 10 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Block Description and Electrical CharacteristicsPower Stages EAS (mJ) 10000 1000 100 0 2 4 6 IL(A) Figure 9 Data Sheet 8 10 EAS.vsd Maximum energy dissipation single pulse, Tj,Start = 150C; VBB = 12V 11 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Block Description and Electrical CharacteristicsPower Stages 4.1.4 Electrical Characteristics Vbb = 9 V to 16 V, Tj = -40 C to +150 C (unless otherwise specified) typical values: Vbb = 13.5 V, Tj = 25 C Pos. Parameter Symbol Limit Values min. typ. max. 4.5 - 28 - - 1.5 2.8 4 8 Unit Test Conditions V VIN = 4.5 V RL = 12 VDS < 0.5 V mA VIN = 5 V A VIN = 0 V VSEN = 0 V VOUT < VOUT(OL) Tj = 25C Tj = 105C 1) Tj = 150C m IL = 5 A Tj = 25 C Tj = 150 C mV IL < 0.5 A A Ta = 85 C Tj 150 C 2) 3) A Tc = 85 C VDS = 0.5 V 3) General Vbb 4.1.1 Operating voltage IGND 4.1.2 Operating current one channel all channels 4.1.3 Stand-by current for whole device with load Ibb(OFF) - - - 5 - - 7.5 7.5 19 - - 19 35 25 48 - 40 - IL(nom) 4.1.6 Nominal load current per channel one channel active two channels active 5.7 4.4 - - - - IL(ISO) ISO load current per channel one channel active two channels active 12.7 12.7 - - - - -24 -20 -17 V IL = 40 mA - 1.5 8 A VIN = 0 V - 3 - A 1) Output characteristics 4.1.4 On-State resistance per channel 4.1.5 Output voltage drop limitation at small load currents 4.1.7 Output clamp 4.1.8 Output leakage current per channel 4.1.9 Inverse current capability RDS(ON) VDS(NL) VOUT(CL) IL(OFF) -IL(inv) Thermal Resistance 4.1.10 Junction to case Rthjc - - 2.2 4.1.11 Junction to ambient one channel active all channels active Rthja - 40 33 - RIN VIN(L) VIN(H) VIN IIN(L) IIN(H) 2.3 3.6 5.3 k -0.3 1.0 V 2.6 17 V K/W 2) Input characteristics 4.1.12 Input resistance 4.1.13 L-input level 4.1.14 H-input level 4.1.15 Input hysteresis 4.1.16 L-input current 4.1.17 H-input current Data Sheet V 1) 75 A VIN = 0.4 V 75 A VIN = 5 V 0.4 3 10 12 38 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Block Description and Electrical CharacteristicsPower Stages Vbb = 9 V to 16 V, Tj = -40 C to +150 C (unless otherwise specified) typical values: Vbb = 13.5 V, Tj = 25 C Pos. Parameter Symbol Limit Values min. typ. max. Unit Test Conditions Timings 4.1.18 Turn-on time to 90% Vbb tON 120 250 s RL = 12 Vbb = 13.5 V 4.1.19 Turn-off time to 10% Vbb tOFF 135 250 s RL = 12 Vbb = 13.5 V 4.1.20 slew rate 30% to 70% Vbb dV/ dtON 0.1 0.25 0.5 V/s RL = 12 Vbb = 13.5 V 4.1.21 slew rate 70% to 30% Vbb -dV/ dtOFF 0.1 0.25 0.5 V/s RL = 12 Vbb = 13.5 V 1) Not subject to production test, specified by design 2) Device mounted on PCB (50 mm x 50 mm x 1.5mm epoxy, FR4) with 6 cm2 copper heatsinking area (one layer, 70 m thick) for Vbb connection. PCB is vertical without blown air. 3) Not subject to production test, parameters are calculated from RDS(ON) and Rth Note: Characteristics show the deviation of parameter at the given supply voltage and junction temperature. Typical values show the typical parameters expected from manufacturing. Note: This thermal data was generated in accordance with JEDEC JESD51 standards. For more information, go to www.jedec.org. Data Sheet 13 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Protection Functions 4.2 Protection Functions The device provides embedded protective functions. Integrated protection functions are designed to prevent IC destruction under fault conditions described in the data sheet. Fault conditions are considered as "outside" normal operating range. Protection functions are neither designed for continuous nor repetitive operation. 4.2.1 Over-Load Protection The load current IOUT is limited by the device itself in case of over-load or short circuit to ground. There are two steps of current limitation which are selected automatically depending on the voltage VDS across the power DMOS. Please note that the voltage at the OUT pin is Vbb - VDS. Please refer to the following figure for details. IL 40 30 20 10 5 Figure 10 10 15 20 25 30 VDS CurrentLimitation.emf Current Limitation (minimum values) Current limitation is realized by increasing the resistance of the device which leads to rapid temperature rise inside. A temperature sensor for each channel causes an over-heated channel to switch off to prevent destruction. After cooling down with thermal hysteresis, the channel switches on again. Please refer to Figure 11 for details. IN IL t IL(LIM) tOFF(SC) IL(SCr) t IIS t Figure 11 OverLoad.emf Shut Down by Overtemperature In short circuit condition, the load current is initially limited to IL(LIM). After thermal restart, the current limitation level is reduced to IL(SCr). The current limitation level is reset to IL(LIM) by switching off the device (VIN = 0 V). 4.2.2 Reverse Polarity Protection The reverse current through the power transistors has to be limited by the connected loads. Additional power is dissipated by the integrated ground resistor. The current trough sense pins IS1 and IS2 has to be limited (please refer to maximum ratings on Page 7). The temperature protection is not active during reverse polarity. 4.2.3 Overvoltage Protection In addition to the output clamp for inductive loads as described in Section 4.1.3, there is a clamp mechanism for overvoltage protection. Because of the integrated ground resistor, overvoltage protection does not require external components. As shown in Figure 12, in case of supply voltages greater than Vbb(AZ), the power transistors switch on, and the voltage across logic part is clamped. As a result, the internal ground potential rises to Vbb - Vbb(AZ). Due to the ESD zener diodes, the potential at pin IN1, IN2 and SEN rises almost to that potential, depending on the impedance of the connected circuitry. Data Sheet 14 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Protection Functions IN ZDAZ RIN VBB IS logic SEN RSEN ZDESD internal ground RGND OUT V OUT GND OverVoltage .emf Figure 12 Overvoltage Protection 4.2.4 Loss of Ground Protection In case of complete loss of the device ground connections, but connected load ground, the BTS5241-2L securely changes to or keeps in off state. Data Sheet 15 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Protection Functions 4.2.5 Electrical Characteristics Vbb = 9 V to 16 V, Tj = -40 C to +150 C (unless otherwise specified) typical values: Vbb = 13.5 V, Tj = 25 C Pos. Parameter Symbol Limit Values min. Unit Test Conditions typ. max. 40 - 55 A - 9.5 - A Tj = Tj(SC) 1) - 0.7 - ms TjStart = 25 C 1) 150 1701) - C - 7 - K 1) Over-Load Protection 4.2.1 Load current limitation 4.2.2 Repetitive short circuit current limitation 4.2.3 Initial short circuit shut down time 4.2.4 Thermal shut down temperature 4.2.5 Thermal hysteresis IL(LIM) IL(SCr) tOFF(SC) Tj(SC) Tj Reverse Battery 4.2.6 Drain source voltage during reverse polarity -VDS(REV) - - 800 mV IL = -3.5 A 4.2.7 Reverse current through GND pin -IGND - 70 - mA Vbb = -13.5 V 1) RGND 120 175 260 - Vbb(AZ) 41 47 53 V Ibb = 150A IL(GND) - - 1 mA IIN = 0 1) 2) ISEN = 0 IGND = 0 IIS = 0 Ground Circuit 4.2.8 Integrated Resistor in GND line Overvoltage 4.2.9 Overvoltage protection Loss of GND 4.2.10 Output current while GND disconnected 1) Not subject to production test, specified by design 2) no connection at these pins Data Sheet 16 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Diagnosis 4.3 Diagnosis For diagnosis purpose, the BTS5241-2L provides an Enhanced IntelliSense signal at pins IS1 and IS2 that is enabled by pin SEN. The current sense signal IIS, a proportional signal to the load current (ratio kILIS = IL / IIS), is provided as long as no failure mode occurs. In case of open load in OFF-state, the voltage VIS(fault) is fed to the diagnosis pin. S OL VBB IIS1 IN1 Rlim ROL gate control RIN1 IS1 0 1 1 0 OUT1 0 1 V IS(fault) SEN C VOUT(OL) RSEN IN2 Rlim IL(PD) channel 1 gate control RIN2 IS2 0 1 RIS1 RIS2 GND diagnosis IIS2 OUT2 channel 2 load Sense.emf Figure 13 Block Diagram: Diagnosis Table 1 Truth Table Operation Mode Normal Operation (OFF) Input Level Output Level L Short Circuit to GND Overtemperature Short Circuit to Vbb Open Load Normal Operation (ON) H Diagnostic Output SEN = H SEN = L Z Z Z GND Z Z Z Z Z Vbb VIS = VIS(fault) Z < VOUT(OL) > VOUT(OL) Z VIS = VIS(fault) Z Z ~Vbb IIS = IL / kILIS Z Current Limitation < Vbb Z Z Short Circuit to GND ~GND Z Z Z Z Z Short Circuit to Vbb Vbb IIS < IL / kILIS Z Open Load ~Vbb Z Z Overtemperature L = Low Level, H = High Level, Z = high impedance, potential depends on leakage currents and external circuit Data Sheet 17 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Diagnosis 4.3.1 ON-State Diagnosis The standard diagnosis signal is a current sense signal proportional to the load current. The accuracy of the ratio (kILIS = IL / IIS) depends on the temperature. Please refer to Figure 14 for details. Usually a resistor RIS is connected to the current sense pin. It is recommended to use sense resistors RIS > 500 . A typical value is 4.7 k 7000 dummy Tj = 150C dummy Tj = -40C 6500 kILIS 6000 5500 5000 4500 4000 0 Figure 14 1 2 3 IL /A 4 5 6 Current sense ratio kILIS1) In case of over-current as well as overtemperature, the current sense signal is switched off. As a result, one threshold is enough to distinguish between normal and faulty operation. Open load and over-load can be differentiated by switching off the channel and using open-load detection in off-state. Details about timings between the diagnosis signal IIS and the output voltage VOUT and the load current IL in ONstate can be found in Figure 15. IN V OUT OFF ON t tON t IL IIS tsIS(ON) tsIS(LC) t t SwitchOn.emf Figure 15 Timing of Diagnosis Signal in ON-state 4.3.2 OFF-State Diagnosis Details about timings between the diagnosis signal IIS and the output voltage VOUT and the load current IL in OFFstate can be found in Figure 16. 1) The curves show the behavior based on characterization data. The marked points are guaranteed in this Data Sheet in Section 4.3.4 (Position 4.3.7). Data Sheet 18 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Diagnosis IN ON OFF t V OUT pull-up resistor inactive Open Load, pull-up resistor active td(fault) IIS t ts(fault) V IS(fault) / RS t SwitchOff.emf Figure 16 Timing of Diagnosis Signal in OFF-state For open load diagnosis in off-state an external output pull-up resistor (ROL) is necessary, because the integrated pull-down current IL(PD) causes secure suppression of the open load condition as long as no pull-up resistor is activated. For calculation of the pull-up resistor, the pull-down current IL(PD) and the open load threshold voltage VOUT(OL) has to be taken into account. V bb(min) - V OUT(OL,max) R OL = -------------------------------------------------------I L(PD,max) + I leakage Ileakage defines the leakage current in the complete system e.g. caused by humidity. Vbb(min) is the minimum supply voltage at which the open load diagnosis in off-state must be ensured. To reduce the stand-by current of the system, an open load resistor switch (SOL) is recommended. 4.3.3 Sense Enable Function The diagnosis signals can be switched off by a low signal at sense enable pin (SEN). See Figure 17 for details on the timing between SEN pin and diagnosis signal IIS. Please note that the diagnosis is enabled, when no signal is provided at pin SEN. SEN IIS tsIS(SEN) tdIS(SEN) tsIS(SEN) tdIS(SEN) t t Figure 17 SEN.emf Timing of Sense Enable Signal The SEN pin circuit is designed equal to the input pin. Please refer to Figure 5 for details. The resistors Rlim are recommended to limit the current through the sense pins IS1 and IS2 in case of reverse polarity and overvoltage. The stand-by current of the BTS5241-2L is minimized, when both input pins (IN1 and IN2) and the sense enable pin (SEN) are on low level or left open and VOUT < VOUT(OL). In case of open load in off-state (VOUT > VOUT(OL) and VIN = 0 V), diagnosis tries to switch on automatically which causes an increase in supply current. To reduce the stand-by current to a minimum, the open load condition has to be suppressed by opening SOL. Data Sheet 19 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Diagnosis 4.3.4 Electrical Characteristics Vbb = 9 V to 16 V, Tj = -40 C to +150 C, VSEN = 5 V (unless otherwise specified) typical values: Vbb = 13.5 V, Tj = 25 C Pos. Parameter Symbol Limit Values min. typ. Unit Test Conditions max. Open Load at OFF state 4.3.1 Open load detection threshold voltage 4.3.2 Integrated output pull-down current 4.3.3 Sense signal in case of open load VOUT(OL) -IL(PD) VIS(fault) 4.3.4 Sense signal current limitation IIS(LIM) 4.3.5 Sense signal invalid after negative input slope td(fault) - - 4.3.6 Fault signal settling time ts(fault) - - 2.0 3.2 4.4 V 200 300 400 A 5.0 6.4 8 V 4 - - VOUT > VOUT(OL) VIN = 0 V VOUT = Vbb IIS = 1 mA mA VIN = 0 V VOUT = Vbb 1.2 ms VIN = 5 V to 0 V VOUT = Vbb 200 s VIN = 0 V VOUT = 0 V to > VOUT(OL) IIS = 1 mA Load Current Sense 4.3.7 kILIS IL = 0.5 A IL = 3.0 A IL = 6.0 A 4170 4300 4350 5420 4850 4850 6670 5400 5350 - VIN = 5 V Tj = -40 C IL = 0.5 A IL = 3.0 A IL = 6.0 A 4450 4500 4550 5250 4950 4950 6050 5400 5350 - Tj = 150 C 5.0 6.3 7.5 V IIS = 0.5 mA IL = 5 A VIN = 5 V IL = 0 A VSEN = 0 V IL = 5 A VIN = 0 V to 5 V IL = 5 A 1) VIN = 5 V IL = 3 A to 5 A 1) Current sense ratio - - - - 4.3.8 Current sense voltage limitation VIS(LIM) 4.3.9 Current sense leakage/offset current IIS(LH) - - 5 A 4.3.10 Current sense leakage, while diagnosis disabled IIS(dis) - - 2 A 4.3.11 Current sense settling time to IIS static 10% after positive input slope tsIS(ON) - - 300 s 4.3.12 Current sense settling time to IIS static 10% after change of load current tsIS(LC) - - 50 s Sense Enable 4.3.13 Input resistance 4.3.14 L-input level 4.3.15 H-input level 4.3.16 L-input current 4.3.17 H-input current Data Sheet RSEN VSEN(L) VSEN(H) ISEN(L) ISEN(H) 20 5.3 k - -0.3 2.3 - 1.0 V - 2.6 - 17 V - 3 - 75 A VSEN = 0.4 V 75 A VSEN = 5 V 10 3.6 38 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Diagnosis Vbb = 9 V to 16 V, Tj = -40 C to +150 C, VSEN = 5 V (unless otherwise specified) typical values: Vbb = 13.5 V, Tj = 25 C Pos. Parameter Symbol Limit Values min. 4.3.18 Current sense settling time tsIS(SEN) - 4.3.19 Current sense deactivation time tdIS(SEN) - - Unit Test Conditions typ. max. 3 10 s VSEN = 0 V to 5 V VIN = 0 V VOUT > VOUT(OL) 10 s VSEN = 5 V to 0 V IIS = 1 mA RIS = 5 k 1) 1) Not subject to production test, specified by design Data Sheet 21 Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Package Outlines BTS5241-2L 0.1 0.1 C 12x Seating Plane 1 5x 1 = 5 0.4 +0.13 0.25 M -0.035 8 C 0.7 0.15 (0.2) (4.4) CAB 10.3 0.3 4.2 0.1 7 0.25 B 1.6 0.1 (1.8) 5.1 0.1 12 7.5 0.1 1) 5 3 B 0.25 +0.075 2.6 MAX. (1.55) 2) 0.8 8 0 +0.1 6.4 0.1 1) A 2.35 0.1 Package Outlines BTS5241-2L 0.1 0.05 3) 5 o0.8 x 0.1 -0.05 Depth 4) 1 6 7.8 0.1 (Heatslug) 1) Does not include 2) Stand OFF 3) Stand OUT 4) plastic or metal protrusion of 0.15 max. per side Pin 1 Index Marking; Polish finish All package corners max. R 0.25 Figure 18 PG-DSO-12-9 (Plastic Dual Small Outline Package) Green Product (RoHS compliant) To meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020). For further information on alternative packages, please visit our website: http://www.infineon.com/packages. Data Sheet 22 Dimensions in mm Rev. 1.4, 2008-05-05 Smart High-Side Power Switch BTS5241-2L Revision History 6 Revision History Revision Date Changes 1.4 2008-05-05 Initial version of RoHS-compliant derivate of BTS5241-2L Page 3: AEC certified statement added Page 3 and Page 20: RoHS compliance statement and Green product feature added Page 3 and Page 20: Package changed to RoHS compliant version Legal Disclaimer updated reversesave feature removed. Modification of the parameter 4.2.6 from 35m resistance to 800mV voltage drop. Change of the Parameter name Page 6 : adding the footnote for output. Connection of the two pins necessary. Data Sheet 23 Rev. 1.4, 2008-05-05 Edition 2008-05-05 Published by Infineon Technologies AG 81726 Munich, Germany (c) 5/5/08 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest Infineon Technologies Office. Infineon Technologies components may be used in life-support devices or systems only with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.