MITSMI MM1538XQ Datasheet
MITSUMI
4ch Moter driver IC for Portable CD Player
4-ch Motor Driver for Portable CD Players
Monolithic IC MM1538
Outline
This driver IC contains a 4ch H bridge driver and DC-DC converter control circuit on one chip, and was
developed for use in portable CD players. QFP-44 is used for the package, making it ideal for smaller sets.
Features
(1) Built-in 4ch H bridge driver, and PWM control of load drive voltage is made possible by external
components.
(2) DC-DC converter control circuit on chip.
(3) With reset output inversion output pin.
(4) Empty detection level can be switched between rechargeable battery and dry battery.
(5) Constant current charging; current value can be varied using external resistor.
(6) Built-in power transistor for charging.
(7) Built-in independent thermal shutdown circuit.
Package
QFP-44
Applications
Portable CD radio cassette recorders
MITSUMI
4ch Moter driver IC for Portable CD Player
Block Diagram
33
34
22
21
20
19
18
17
16
15
14
13
12
35
36
37
38
39
40
41
42
43
44
1 2 3 4 5 6 7 8 9 10 11
32 31 30 29 28 27 26 25 24 23
AMUTE
EMP
HVcc
PSW
CLK
START
OFF
CHGVcc
SEL
PREGND
PWMFIL
IN1
MUTE2
IN2
MUTE34
IN4
IN3
Vref
VSYS2
OP+
OP
OUT
VSYS1
RCHG OUTIR OUT1F OUT2R OUT2F POWGND OUT3F OUT3R OUT4F OUT4R BRAKE1
BSEN BATT RESET DEAD SW EO EI SPRT CT N.C. OP
-
V
I
/
V
I
/
V
I
/
V
I
/
BRAKE1
BTL
BTL
BTL
BTL
POWER
OFF
STARTER
MAXIMUM
DETECTION
CLK
TSD
TRIANGLE WAVE
OVER-VOLTAGE
PRE
-
DRIVER POWER SUPPLY
TSD
POWER UNIT
POWER SUPPLY
CONTROL CIRCUIT
POWER SUPPLY
MUTE2
MUTE34
MITSUMI
4ch Moter driver IC for Portable CD Player
Pin Assignment
AMUTE
RCHG OUT1R OUT1F OUT2R OUT2F OUT3F OUT3R OUT4F OUT4R BRAKE1
POWGND
BSEN BATT RESET DEAD SW EI SPRT CT N.C. OP
-
EO
1 2 3 4 5 7 8 9 10 116
33
34
35
36
37
38
39
40
41
42
43
44
22
21
20
19
18
17
16
15
14
13
12
32 31 30
MM1538XQ
29 27 26 25 24 2328
EMP
HV
CC
PSW
CLK
START
OFF
CHGV
CC
SEL
PREGND
PWMFIL
IN1
MUTE2
IN2
MUTE34
IN4
IN3
Vref
VSYS2
OP+
OPOUT
VSYS1
1 BSEN 23 BRAKE1
2 BATT 24 OUT4R
3 RESET 25 OUT4F
4 DEAD 26 OUT3R
5 SW 27 OUT3F
6 EO 28 POWGND
7 EI 29 OUT2F
8 SPRT 30 OUT2R
9 C
T 31 OUT1F
10 N.C. 32 OUT4R
11 OP
-
33 RCHG
12 VSYS1 34 AMUTE
13 OPOUT 35 EMP
14 OP+ 36 HV
CC
15 VSYS2 37 PSW
16 Vref 38 CLK
17 IN3 39 START
18 IN4 40 OFF
19 MUTE34 41 CHGV
CC
20 IN2 42 SEL
21 MUTE2 43 PREGND
22 IN1 44 PWMFIL
MITSUMI
4ch Moter driver IC for Portable CD Player
Pin No. Pin Name
Input/Output
Function Internal Equivalent Circuit
1 BSEN
Battery Voltage Monitor
1
71kΩ
16.5kΩ
20kΩ
10.5kΩ
14.85kΩ
Pin Description
Input
Battery Power Supply InputInput Power Supply
3 RESET Output Reset Detect Output
4
49kΩ
13kΩ
30.8kΩ
4 DEAD Input DEAD Time Setting
5 SW Output Transistor Drive For Voltage
Multiplier
3
90kΩ
VSYS1
2 BATT
6
VSYS1
6 EO Output Error Amplifier Output
BATT
5
150Ω
6kΩ
MITSUMI
4ch Moter driver IC for Portable CD Player
Pin No. Pin Name
Input/Output
Function Internal Equivalent Circuit
7 EI
Error Amplifier Input
35kΩ
21.6kΩ
7
VSYS1
Pin Description
Input
Short Circuit Protection
Setting
Output
9 CT Output Triangular
-
Wave Output
10 N.C.
11 OP
-
14 OP+
Input Op Amp Negative Input
Op Amp Positive Input
420kΩ
10kΩ
2kΩ
9
VSYS1
BATT
8 SPRT
220kΩ
8
VSYS1
12 VSYS1 Input Control Circuit Power Supply
Input
Control Circuit Power Supply
13
VSYS1
13 OPOUT Output Op Amp Output
14
11
MITSUMI
4ch Moter driver IC for Portable CD Player
Pin No. Pin Name
Input/Output
Function Internal Equivalent Circuit
15 VSYS2
Driver Pre-step Power Supply
Pin Description
Input
Reference Voltage InputInput
17 IN3
18 IN4
20 IN2
22 IN1
Input ch3 Control Signal Input
ch4 Control Signal Input
ch2 Control Signal Input
ch1 Control Signal Input
68kΩ
68kΩ
19
21
23
19 MUTE34
21 MUTE2
23 BRAKE1
Input ch3 and 4 Mute
ch2 Mute
ch1 Brake
11kΩ
20PIN=7.5kΩ
17
18
20
22
16 Vref
16
24kΩ
50kΩ
200Ω
4
36
24
26
30
32
25
27
29
31
28
24 OUT4R
25 OUT4F
26 OUT3R
27 OUT3F
29 OUT2F
30 OUT2R
31 OUT1F
32 OUT1R
Output ch4 Negative Output
ch4 Positive Output
ch3 Negative Output
ch3 Positive Output
ch2 Positive Output
ch2 Negative Output
ch1 Positive Output
ch1 Negative Output
28 POWGND Power Block Power Supply
Ground
36 HVCC Input H-Bridge Power Supply Input
950Ω
33
33 RCHG Input Charge Current Setting
Pre
-
Drive Power Supply
MITSUMI
4ch Moter driver IC for Portable CD Player
Pin No. Pin Name
Input/Output
Function Internal Equivalent Circuit
34 AMUTE
Reset Invert Output
34
95kΩ
BATT
Pin Description
Output
Empty Detect OutputOutput
37 PSW Output PWM Transistor Drive
38
2kΩ
50kΩ
100kΩ
VSYS1
38 CLK Input External Clock Synchronizing
Input
39 START Input Voltage Multiplier DC
-
DC
Converter Start
50Ω
37
BATT
35 EMP
35
40
180kΩ
27kΩ
VSYS1
40 OFF Input Voltage Multiplier DC-DC
Converter OFF
39
390kΩ
200kΩ
BATT
MITSUMI
4ch Moter driver IC for Portable CD Player
Pin No. Pin Name
Input/Output
Function Internal Equivalent Circuit
41 CHGV
CC Charging Circuit Power Supply
Input
Pin Description
Input
Empty Detect Level SwitchInput
Output
43 PREGND Pre Section Power Supply
Ground
2kΩ
2kΩ
VSYS1
44
44 PWMFIL Input PWM Phase Compensation
42 SEL
200kΩ
130kΩ
15kΩ
42
BATT
Charging Circuit Power Supply
Pre Section Power Supply Ground
*
The positive and negative outputs are the polarity with respect to the input
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