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ICs for Audio Common Use
AN7077Z
Power supply and boost IC for class-H power amplifier
■ Overview
A BTL 50 W × 2-channel (maximum. 75 W × 2-
channel) class-H power amplifier can be made up by combining the power supply boost amplifier AN7077Z and
the single power supply BTL audio power amplifier
AN7194Z, and it is possible to make a low consumption
power system.
■ Features
• Incorporating various protection circuits
• Built-in standby circuit
• Peak detection circuit : Limits class-H operation at high
frequency
• Built-in timer circuit
If a current larger than allowable value continues to flow
into the power supply transformer, this circuit stops the
class-H operation to prevent the transformer from damage by a fire.
• Built-in mute function
• Built-in LED driver
■ Applications
• Miniature audio component, CD player radio cassette,
karaoke and other audio equipment
Unit : mm
18.00±0.30
13.50±0.30
φ3.60±0.10
115
19.00±0.30
19.30±0.30
1.27
0.50
+0.20
−0.10
4.00±0.20
1.50±0.10
10.0±0.30
(0.61)
(1.80) (1.95)
0.25
(2.54)
+0.15
−0.05
13.25±0.30
2.40±0.50
15.65±0.50
R0.55
3.25±0.10
18.95±0.50
HZIP015-P-0745A
1
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AN7077Z ICs for Audio Common Use
■ Block Diagram
V
Mute
12
6
LED driver
14
ASO
Peek
1
V
CCH
det.
Level shift
4 V
BE
8
IN
Level shift
1 V
BE
10 kΩ
I
OUT
det.
15
9
24 V clamp
11
Class-H
mute
15 µA5 µA
V
= 6 V
RF
4
13
0.3 V
6 V
10
STB
■ Pin Descriptions
Pin No. Description
1 Power supply
2N.C.
3 Timer current setting
4 Current detection
5 Timer
6 Peak detection
7 GND
8 Input
7
GND
2
V
RF
Constant current
3
5
Pin No. Description
9NF
10 Standby
11 Muting
12 LED
13 Ripple filter
14 ASO
15 Output
2