L9925 DMOS DUAL FULL BRIDGE DRIVER 2 INDEPENDENTLY CONTROLLED H-BRIDGES DS,ON amb S R <0.9 T = 25C, V = 14V 0.8A DC CURRENT WITHOUT HEAT SINK LOW QUIESCENT MODE Iq <200A THEMAL PROTECTION CROSS CONDUCTION PROTECTION SUPPLY VOLTAGE UP TO 40V CMOS COMPATIBLE INPUTS OUTPUT SHORT-CIRCUIT PROTECTION SO28 ORDERING NUMBER: L9925 DESCRIPTION The L9925 is a dual full bridge driver for stepper motor applications. Realized in BCD (Bipolar, CMOS & DOS) techology, logic circuits, precise The charge pump is integrated on chip no exter- linear blocks and power transistors are combined nal components are required. Full performance is to optimize circuit performance and minimize off maintaned for 9V <VS <16V. Extended ranges of chip components. Schmitt triggers are used for all input stages and are fully compatible with 5V 6V <<VS <9V and 16V <VS <40V yields full func- CMOS logic levels. When both enable signals are tionally but with relaxed performance. Over tem- perature protection and ESD protection to all pins low, the IC is commanded to a low quiescent cur- ensures relability and reduces system integration rent state and will draw less than 200A from the failures. battery. BLOCK DIAGRAM OUT1 VS1 OUT2 CHARGE CHARGE PUMP PUMP IN1 IN2 7V TEMP 7V EN1 EN1 7V T1 EN1 T2 PGND1 1st FULL BRIDGE T1 T2 EN1 5V GND VS2 REGULATOR 40V T1 T2 EN2 EN2 OUT3 IN3 IN4 OUT4 2nd FULL BRIDGE D99AT423 March 1999 1/9 ............................................................................................................................................................................................................... Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) L9925 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are those values beyond whih damage to the device may occur. Functional operation under these condition isnt implied. For voltages and currents applied externally to the device: Symbol Parameter Value Unit VVSDC Dc Supply Voltage -0.3 to 26 V (1) VVSP Supply Voltage Pulse (T 400ms) 40 V IOUT DC Output Load Current 1.2 A IOUT MAX DC Output Current: for VOUT > VVS +0.3V or VOUT < -0.3V 1.8 A the internal DMOS reverse and/or substrate diode become conductive and the applied current should not exceed the specified limit. VIN1,2 DC Input Voltage -0.3 to 7 V VEN Enable Input Voltage -0.3 to 7 V T , T Storage and Junction Temperature -40 to 150 C stg j Ptot Total Power Dissipation (Tpins = 80C) 5 W (Tamb = 70C no copper area on PCB) 1.23 W 2 (Tamb =70C 8cm copper area on PCB) 2 W (1) Device may be overstressed if pulsed simultaneous with short circuit at one or more of the outputs will be present. PIN CONNECTION PGND 1 28 N.C. 2 IN1 27 IN2 EN1 3 26 OUT2 4 N.C. 25 N.C. N.C. 5 24 N.C. 6 OUT1 23 VS1 GND 7 22 GND GND 8 GND 21 OUT3 9 20 VS2 N.C. 10 19 N.C. N.C. 11 18 N.C. EN2 12 17 OUT4 IN3 13 16 IN4 PGND 14 15 N.C. D88AT424 THERMAL DATA Symbol Parameter Value Unit TjTS Thermal Shut-down junction temperature min. 150 C TjTSH Thermal Shut-down thereshold hysteresis typ. 25 C (2) Rth j-amb Thermal Resistance Junction-ambient 50 C/W Rth j-pins Thermal Resistance Junction-pins 15 C/W (2) 2 With 6cm on board heat sink area 2/9 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)