UTC MM1538
LINEAR INTEGRATED CIRCUIT
4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS
DESCRIPTION
The UTC MM1538 contains a 4...
UTC MM1538
LINEAR INTEGRATED CIRCUIT
4-CH MOTOR DRIVER FOR PORTABLE CD PLAYERS
DESCRIPTION
The UTC MM1538 contains a 4ch H bridge driver and DC-DC converter control circuit on one chip, and was developed for use in portable CD players.
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
APPLICATIONS
*Portable CD radio cassette recorders
PIN CONFIGURATION
www.DataSheet4U.com
RCHG OUT1R OUT1F OUT2R OUT2F 33 32 31 30 29 POW GND 28 OUT3F OUT3R OUT4F OUT4R BRAKE1 27 26 25 24 23
AMUTE 34
22
IN1
EMP 35
21 MUTE2
HVcc 36
20 IN2
PSW 37
19
MUTE34
CLK 38
18
IN4
START 39 OFF 40
UTC MM1538
17
IN3
16 Vref 15 VSYS2 14
CHGVcc 41
SEL 42
OP+
PREGND 43
13 OPOUT
PWMFIL 44
12
VSYS1
1 BSEN
2 BATT
3
4
5 SW
6 EO
7 EI
8 SPRT
9 CT
10 N.C.
11 OP-
RESET DEAD
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R109-009,A
UTC MM1538
PIN DESCRIPTION
1 BSEN Input
LINEAR INTEGRATED CIRCUIT
FUNCTION
Battery
Voltage Monitor
PIN PIN NAME INPUT/OUTPUT NO.
INTERMAL EQUIVALENT CIRCUIT
1
71kΩ 10.5kΩ 14.85kΩ 16.5kΩ 20 kΩ
2 3
BATT RESET
Input Output
Battery Power S...
