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Marantz CD5400/F1N CD5400/LIG Service Manual Page 55

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55
TA2125AF(MAIN:IC32)
BlockDiagram
TerminalFunction
TA2125AF
2002-02-12
1
TOSHIBA Bipolar Liner Integrated Circuit Silicon Monolithic
TA2125AF
Power Driver IC for CD Player
TA2125AF is power driver IC developed for CD players.
This IC have built-in 4 channel BTL power amplifiers and 1
channel H-Bridge driver.
Which drives focus-coil and tracking coil for 3-beam pick-up head,
disc motor, feed motor and loading motor.
Featuers
 4 channel BTL linear drivers
High output power: V
out
= 5.1 Vp-p (V
CC
= 8 V, R
L
= 8 Ω)
Stand-by switch for BTL drivers
 1 channel H-Bridge: V
CE (H)
+ V
CE (L)
= 1.3 V (V
R
= V
M
= 8 V,
I
O
= 200 mA)
Logic control (forward, revers, brake, stand-by)
 Punch through current restriction diode for H-bridge
 5 V regulator reference amp (with external output Tr.)
 Thermal shut down protection
 Operating supply voltage range: V
CC
= 5.0-9.0 V
BlockDiagram
Weight: g (typ.)
Preliminar
y
24
6 7 12 131 2
RL5
36
V
R
35 34 33 32 31 30
Control
Logic
3
STBY
STBY
RIN FIN
4ch
Driver
STB
IN3 IN4
REG
STB
29 2728
FIN
V
CC
26 25
REG OUT
N.C.
23 22 21
3 3
3
3
20 19
4
VCIN IN1
5
N.C. N.C.
3
3
3
3
15 16 17 18
IN2
N.C. N.C.
11 148 9
FIN
10
GND
Iref TSD
RL4 RL3
RL2 RL1
TA2125AF
2002-02-12
2
TerminalExplanation
No. Symbol Function
1 OUT5A Output terminal H-bridge
2 V
M
Supply voltage terminal for Logic H-bridge
3 OUT5B Output terminal H-bridge
4 V
CIN
Input reference voltage 4ch BTL
5 IN1 Input for ch1 4ch BTL
6 N.C. Open
7 N.C. Open
8 N.C. 8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
9 N.C. 8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
10 N.C. 8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
11 IN2 Input for ch2 4ch BTL
12 N.C. Open
13 N.C. Open
14 V
CC1
Supply voltage terminal for ch1/ch2 4ch BTL
15 OUT2M Inverted output for ch2 4ch BTL
16 OUT2P Non-inverted output for ch2 4ch BTL
17 OUT1M Inverted output for ch1 4ch BTL
18 OUT1P Non-inverted output for ch1 4ch BTL
19 OUT3P Non-inverted output for ch3 4ch BTL
20 OUT3M Inverted output for ch3 4ch BTL
21 OUT4P Non-inverted output for ch4 4ch BTL
22 OUT4M Inverted output for ch4 4ch BTL
23 V
CC2
Supply voltage terminal for ch3/ch4 4ch BTL
24 N.C. Open
25 REG Connection with BASE of PNP Tr Regulator
26 REG OUT Output for regulator (5 V) Regulator
27 N.C. 8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
28 N.C. 8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
29 N.C. 8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
30 REG STBY Standby control for regulator Regulator
31 IN4 Input for ch4 4ch BTL
32 IN3 Input for ch3 4ch BTL
33 STBY Standby control for 4ch BTL 4ch BTL
34 FIN Logic control input H-bridge
35 RIN Logic control input H-bridge
36 VR Supply voltage terminal for motor driver H-bridge
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