DESCRIPTION
LINEAR INTEGRATED CIRCUIT FEATURES
*Built-in 4ch H bridge driver, and PWM control of load drive voltage is made possible by external components. *DC-DC converter control circuit on chip. *With reset output inversion output pin. *Empty detection level can be switched between rechargeable battery and dry battery. *Constant current charging; current value can be varied using external resistor. *Built-in power transistor for charging. *Built-in independent thermal shutdown circuit. QFP-44-0.8 *Pb-free plating product number: UA1538L ORDERING INFORMATION Ordering Number Normal Lead Free Plating UA1538-QM1-T UA1538L-QM1-T Package QFP-44-0.8 Packing Tube Copyright © 2005 Unisonic Technologies Co., 1 QW-R109-023,B UA1538 PIN CONFIGURATION RCHG OUT1R OUT1F OUT2R OUT2F 33 32 31 30 29 POW GND 28 27 26 LINEAR INTEGRATED CIRCUIT OUT3F OUT3R OUT4F OUT4R BRAKE1 25 24 23 AMUTE 34 22 IN1 EMP 35 HVc c PSW CL K 21 MUTE2 36 20 IN2 37 19 MUTE34 38 18 IN4 START 39 UTC UA1538 17 IN3 OFF 40 16 Vref CHGVcc 41 15 VSYS2 OP + OPOUT SEL 42 14 PREGND 43 13 PWMFIL 44 12 VSYS1 1 BSEN 2 BATT 3 4 5 SW 6 EO 7 EI 8 SPRT 9 CT 10 N.C.
Unisonic Technologies
