Smart High-Side Power Switch Smart High-Side Power Switch PROFET BTS721L1 Data Sheet Rev. 1.3, 2010-03-16 Automotive Power Smart High-Side Power Switch BTS721L1 Smart Four Channel Highside Power Switch Features Product Summary Overload protection Current limitation Overvoltage Protection V 43 V bb(AZ) Short-circuit protection Operating voltage Vbb(on) 5.0 ... 34 V Thermal shutdown two parallel four parallel active channels: one Overvoltage protection On-state resistance R 100 50 25 m ON (including load dump) Nominal load current 2.9 4.3 6.3 A Fast demagnetization of inductive loads 1 ) Reverse battery protection Current limitation 8 8 8 A Undervoltage and overvoltage shutdown with auto-restart and hysteresis Open drain diagnostic output P-DSO-20 PG-DSO20 Open load detection in ON-state CMOS compatible input Loss of ground and loss of V protection bb Electrostatic discharge (ESD) protection Application C compatible power switch with diagnostic feedback for 12 V and 24 V DC grounded loads All types of resistive, inductive and capacitive loads Replaces electromechanical relays and discrete circuits General Description N channel vertical power FET with charge pump, ground referenced CMOS compatible input and diagnostic feedback, monolithically integrated in Smart SIPMOS technology. Providing embedded protective functions. Pin Definitions and Functions Pin Symbol Function Pin configuration (top view) 1,10, V Positive power supply voltage. Design the bb 11,12, wiring for the simultaneous max. short circuit V 1 20V bb bb 15,16, currents from channel 1 to 4 and also for low GND1/2 2 19 V bb 19,20 thermal resistance IN1 3 18 OUT1 3 IN1 Input 1 .. 4, activates channel 1 .. 4 in case of ST1/2 4 17 OUT2 5 IN2 logic high signal IN2 5 16 V 7 IN3 bb GND3/4 6 15 V 9 IN4 bb IN3 7 14 OUT3 18 OUT1 Output 1 .. 4, protected high-side power output ST3/4 8 13 OUT4 17 OUT2 of channel 1 .. 4. Design the wiring for the 14 OUT3 max. short circuit current IN4 9 12 V bb 13 OUT4 V 10 11 V bb bb 4 ST1/2 Diagnostic feedback 1/2 of channel 1 and channel 2, open drain, low on failure 8 ST3/4 Diagnostic feedback 3/4 of channel 3 and channel 4, open drain, low on failure 2 GND1/2 Ground 1/2 of chip 1 (channel 1 and channel 2) 6 GND3/4 Ground 3/4 of chip 2 (channel 3 and channel 4) 1) With external current limit (e.g. resistor R =150 ) in GND connection, resistor in series with ST GND connection, reverse load current limited by connected load. Data Sheet 2 Rev. 1.3, 2010-03-16