AN8816SB Datasheet, PDF (7/8 Pages) Panasonic Semiconductor – 4ch. Linear Driver IC for CD/CD-ROM

ICs for CD/CD-ROM Player
s Characteristic Curve
4,000
3,600
3,200
3,141
2,800
2,400
2,000
1,600
1,200
1,120
800
400
0
0
PD –Ta
Glass epoxy board
(100mm × 80mm × 1.6mm)
Rthj– a = 39.8˚C/W
PD = 3141mW (25˚C)
Unit
Rthj– a = 111.6˚C/W
PD = 1120mW (25˚C)
25 50 75 100 125 150
Ambient Temperature Ta (˚C)
AN8816SB
VCC – Maximum Output Amplitude Characteristics
RL= 8Ω
8.0
7.0
6.0
5.0
4.0
3.0
2.0
5 6 7 8 9 10 11 12 13
VCC (V)
s Description for use
• Driver Portion
Calculate the driver gain by using the following formula for setting.
G=
60kΩ
RIN1+100 (Ω)
×2
The power supply for Ch.1 and 2 is supplied from Pin20 and the power supply for Ch.3 and 4 is supplied from Pin9
independently.
Output amplitude is increased by increasing the supply voltage. Set the power supply voltage as necessary. However, always set
Pin7 of VCC to the maximum electric potential.
Pin8 and 21 may require a capacitor for ripple removal.
As protection functions, VCC reset circuit,VREF detector and heat protection circuit are incorporated.
The VCC reset circuit operates at approx. 3V and is released at 3.2V, when the supply (Pin7) decreases. For the VREF detector, the
protection function works at approx. 1V (max. 2V).
Also, the set temperature for operation of the heat protection circuit is approx. 180˚C .
PC (Power Cut) functions which can be independently controlled are incorporated in Ch.1 and 2.
• 5V Supply
By adding an external PNP transistor, 5V regulator can be constructed. Attach an external capacitor for loop filter to output Pin2.
In Pin1, the base current limiting circuit (typ. 10mA) is incorporated.
When the V supply is used, the external PNP Tr emitter must be connected to pin than Pin7 (SVCC pin)
• OP Amp.
When the operational amplifier is not used, make connection as follows ;
VREF