Hitachi 22LD4500UK, Service Manual, Page: 18 / 59

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11.12. TDA1308
11.12.1. General Description
The TDA1308 is an integrated class AB stereo headphone driver contained in an SO8 or a DIP8 plastic
package. The device is fabricated in a 1 mm CMOS process and has been primarily developed for portable
digital audio applications.
11.12.2. Features
•
Wide temperature range
• No switch ON/OFF clicks
•
Excellent power supply ripple rejection
•
Low power consumption
• Short-circuit resistant
• High performance
•
high signal-to-noise ratio
•
High slew rate
•
Low distortion
• Large output voltage swing.
11.12.3. Pinning
SYMBOL PIN DESCRIPTION PIN VALUE
OUTA 1 Output A (Voltage swing) Min : 0.75V, Max : 4.25V
INA(neg) 2 Inverting input A Vo(clip) : Min : 1400mVrms
INA(pos) 3 Non-inverting input A 2.5V
V
SS
4 Negative supply 0V
INB(pos) 5 Non-inverting input B 2.5V
INB(neg) 6 Inverting input B Vo(clip) : Min : 1400mVrms
OUTB 7 Output B (Voltage swing) Min : 0.75V, Max : 4.25V
V
DD
8 Positive supply 5V, Min : 3.0V, Max : 7.0V
11.13. AN7522N
11.13.1. General description
AN7522N is a BTL 5.0W x 2ch Power Amplifier with Standby and Volume Function Silicon Monolithic
Bipolar IC. It is used for low frequency amplifier applications.
11.13.2. Pin Descriptions
Pin No Description Pin No Description
1 Vcc 7 GND (Input)
2 Ch.1 Output (+) 8 Ch.2 Input
3 GND (Ch.1 Output) 9 Volume
4 Ch.1 Output (-) 10 Ch.2 Output (-)
5 Standby 11 GND (Ch.2 Output)
6 Ch.1 Input 12 Ch.2 Output (+)