HA13151 Hitachi Semiconductor, HA13151 Datasheet - Page 9

• Manufacturer Part Number: HA13151
• Description: 14 W X 4-Channel BTL Power IC
• Manufacturer: Hitachi Semiconductor

2. How to Reduce the Popping Noise by Muting Circuit
Table 1
C (µF)
nothing
0.47
4.7
At normal operating circuit, Muting circuit operates at high speed under 1 µs.
In case popping noise becomes a problem, it is possible to reduce the popping noise by connecting
capacitor, which determines the switching time constant, between pin 10 and GND. (Following
figure 2)
We recommend value of capacitor greater then 1 µF.
Also transitional popping noise can be reduced sharply by muting before V
ON/OFF.
Muting ON/OFF Time
Figure 2 How to use Muting Circuit
ON Time
under 1 µs
2 ms
19 ms
OFF Time
under 1 µs
2 ms
19 ms
HA13151, HA13152
CC
and Standby are
9