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Minilogic Device |
ML1538
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ML1538 4-ch Motor Driver for Portable CD players
Application
Portable CD player
www.DataSheet4U.com
Features
z Built-in 4ch H bridge driver, and PWM control
of load drive voltage is made possible by
external components.
z DC-DC converter control circuit on chip.
z With inverted reset output pin.
z Empty detection level can be switched between
rechargeable battery and dry battery.
z Constant current charging; amount of current
can be varied by external resistor.
z Built-in power transistor for charging.
z Built-in independent thermal shutdown circuit
z Package : QFP-44
General Description
ML1538 driver IC contains a 4ch H bridge driver and DC-DC converter control circuit, and was
developed for portable CD players. The package in use is QFP-44, making it ideal for smaller set.
4ch Motor Driver for Portable CD Player
1/17
March, 2004 V1.0
ML1538
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Block Diagram
RCHG OUT1R OUT1F OUT2R OUT2F POWGND OUT3F OUT3R OUT4F OUT4R BRAKE1
33 32 31 30 29 28 27 26 25 24 23
BRAKE1
AMUTE 34
22 IN1
EMP 35
21 MUTE2
HV CC 36
PSW 37
CLK 38
START 39
OFF 40
CHGVCC 41 TSD
SEL 42
PREGND 43
PWMFIL 44
BTL BTL BTL BTL
20 IN2
TSD
MAXIMUM
DETECTION
+-
POWER OFF
STARTER
OVER-VOLTAGE
V
/
I
-
+
19 MUTE34
V
/
I
-
+
18 IN4
V
/
I
-
+
17 IN3
V
/
I
-
+
Pre-Driver Pow er Supply
TRIANGLE-WAVE
16 Vref
15 VSYS2
14 OP+
+
-
+-
+ +-
+-
+-
-
+
13 OPOUT
Control Circuit
Pow er Supply
12 VSYS1
1 2 3 4 5 6 7 8 9 10 11
BSEN BATT RESET DEAD SW
EO
EI
SPRT
CT
N.C. OP-
4ch Motor Driver for Portable CD Player
2/17
March, 2004 V1.0
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