HA13156 Datasheet, PDF (3/18 Pages) Hitachi Semiconductor – 38 W x 4-Channel BTL Power IC

Note: 1. Standby
Power is turned on when a signal of 3.5 V or 0.05 mA is impressed at pin 2.
When pin 2 is open or connected to GND, standby is turned on (output off).
5V
2
37.5 k
23.5 k
Q1 ON
↓
BIAS ON
HA13156
2. Muting
Muting is turned off (output off) when a signal of 3.5 V or 0.2 mA is impressed at pin 10.
When pin 10 is open or connected to GND, muting is turned on (output off).
5V
10
25 k
Q2 ON
↓
MUTE ON
3. DC-DC converter (Booster)
DC-DC converter (Booster) in IC is turned on when a signal of 3.5 V over or 0.04 mA over is
impressed at pin 13, and get large max output power.
When pin 13 is open or connected to GND, DC-DC converter (Booster) is turned off.
This IC is generated noise, because built-in DC-DC converter (Booster).
Consequently if you use radio tuner (AM), I recommend DC-DC converter (Booster) off.
5V
13
30 k
20 k
Q3 ON
↓
Booster ON
3