TA2125AF
Preliminary
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.
Features
•
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 to 9.0 V
Weight: 0.74 g (typ.)
•
•
•
•
•
Block Diagram
4ch
Driver
REG
RIN FIN STB IN3 IN4 STB
V
CC
RL4
REG OUT
36
35
34
33
STBY
32
31
30
STBY
29
28
FIN
27
26
25
N.C.
24
23
×
3
22
21
20
19
RL3
V
R
Control
Logic
×
3
×
3
×
3
Iref
TSD
×
3
×
3
×
3
×
3
1
2
RL5
3
4
5
6
7
8
9
FIN
GND
10
11
12
13
14
15
16
17
18
N.C. N.C.
VCIN IN1
N.C. N.C.
IN2
RL2
RL1
1
2003-10-07
TA2125AF
Terminal Explanation
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Symbol
OUT5A
V
M
OUT5B
V
CIN
IN1
N.C.
N.C.
N.C.
N.C.
N.C.
IN2
N.C.
N.C.
V
CC1
OUT2M
OUT2P
OUT1M
OUT1P
OUT3P
OUT3M
OUT4P
OUT4M
V
CC2
N.C.
REG
REG OUT
N.C.
N.C.
N.C.
Output terminal
Supply voltage terminal for Logic
Output terminal
Input reference voltage
Input for ch1
Open
Open
8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
Input for ch2
Open
Open
Supply voltage terminal for ch1/ch2
Inverted output for ch2
Non-inverted output for ch2
Inverted output for ch1
Non-inverted output for ch1
Non-inverted output for ch3
Inverted output for ch3
Non-inverted output for ch4
Inverted output for ch4
Supply voltage terminal for ch3/ch4
Open
Connection with BASE of PNP Tr
Output for regulator (5 V)
8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
8, 9, 10, 27, 28, 29 are connected to PW GND (FIN)
Function
H-bridge
H-bridge
H-bridge
4ch BTL
4ch BTL
4ch BTL
4ch BTL
4ch BTL
4ch BTL
4ch BTL
4ch BTL
4ch BTL
4ch BTL
4ch BTL
4ch BTL
4ch BTL
Regulator
Regulator
Regulator
4ch BTL
4ch BTL
4ch BTL
H-bridge
H-bridge
H-bridge
REG STBY Standby control for regulator
IN4
IN3
STBY
FIN
RIN
VR
Input for ch4
Input for ch3
Standby control for 4ch BTL
Logic control input
Logic control input
Supply voltage terminal for motor driver
2
2003-10-07
TA2125AF
Precaution Use
(4ch BTL)
•
Input stage
Minimum input DC voltage range for buffer is 0.2 V
•
Driver stage
Each channel driver consists of BTL configuration linear amplifier.
Voltage gain is fixed: Gv
=
15.2dB
•
VCIN terminal
VCIN is reference voltage terminal for input signal
•
GND
Pin 8~10 and Pin 27~29 are connected to FIN through inner lead frame.
Each FIN are not connected each other also.
The heat of power dissipation is transferred to PCB, through PW-GND Pin. PW GND is connected to substrate
of Pellet to connected copper foil area as large as possible.
•
V
CC1
/V
CC2
Pin 14 and pin 23 are not connected through AL layer on chip.
(H-Bridge)
•
VR/VM terminal
VR terminal is control for H-brige dynamic range. I36
=
30 mA (Brake Mode)
VM terminal is V
CC
terminal for H-Bridge.
•
STBY/REG STBY
STBY is standby control terminal for 4ch BTL.
REG STBY is standby control terminal for regulator.
Maximum Ratings
(Ta
=
25°C)
Characteristics
Supply voltage
Power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
P
D
T
opr
T
stg
Rating
12
1.7
−35~85
−55~150
Unit
V
W
°C
°C
3
2003-10-07
TA2125AF
Electrical Characteristics
Characteristics
Operating supply voltage
Quiescent current
(Unless otherwise specified, V
CC
=
8 V, R
L
=
8
Ω
, VBIAS
=
2.1 V, f
=
1 kHz, Ta
=
25°C)
Symbol
V
CC
1, 2
I
ccq
Test
Circuit
Test Condition
Min
5
27
Typ.
8
37
Max
9
60
Unit
V
mA
V
IN
=
VBIAS, R
L
=
OPEN
(With out H-SW)
4ch BTL Driver
Characteristics
Output offset voltage
Maximum output voltage
Voltage gain
Stand-by 1 control voltage
Symbol
V
OS
V
OM
Gv
V
STB (on)
V
STB (off)
Stand-by current
I
STB1
Test
Circuit
V
IN
=
VBIAS, R
L
=
OPEN
H-Bridge: Stand-by
5 V REG: Stand-by
R
g
=
0
V
IN
=
4 V/GND
V
IN
=
VBIAS
±
200 mV
Test Condition
Min
−50
4.5
14.0
3.0
Typ.
10
5.1
15.2
Max
50
16.4
0.5
1
Unit
mV
V
dB
V
V
µA
Regulator Reference Amp
Characteristics
Output voltage
Symbol
V
reg
V
reg (on)
V
reg (off)
Test
Circuit
Test Condition
I
o
=
200 mA
Tr. 2SA1203Y
Min
4.6
2.5
GND
Typ.
5
Max
5.2
V
CC
1.5
Unit
V
V
V
Regulator control voltage
H-Bridge
Characteristics
Output saturation voltage
Stand-by current
Symbol
V
CE
I
STB2
V
HB (on)
V
HB (off)
Test
Circuit
Test Condition
I
o
=
200 mA
4ch BTL: Stand-by
5 V REG: Stand-by
Min
2.5
GND
Typ.
1.3
Max
1.4
1
V
CC
0.7
Unit
V
µA
V
V
Control voltage
H-Bridge Control Logic/V
R
Current
(36pin)
Operation Mode
Forward
Revers
Brake
Stand-by
Fin
H
L
H
L
Rin
L
H
H
L
Out5A
L
H
L
Open
Out5B
H
L
L
Open
V
R
Current
19.5
19.5
30
1
Unit
mA
mA
mA
µA
4
2003-10-07
TA2125AF
Test Circuit
100
µF
0.1
µF
0.1
µF
47
µF
RL4
N.C.
26
25
24
23
×
3
22
21
RL3
36
35
34
33
STBY
32
31
30
STBY
29
28
FIN
27
20
19
Control
Logic
×
3
×
3
×
3
Iref
TSD
×
3
×
3
×
3
×
3
1
2
3
4
5
6
7
8
9
FIN
GND
10
11
12
13
14
15
16
17
18
N.C. N.C.
RL5
N.C. N.C.
RL2
RL1
5
2003-10-07
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