HA13151 データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA13151

14 W x 4-channel BTL power IC

Hitachi -> Renesas Electronics 

HA13151, HA13152

2. How to Reduce the Popping Noise by Muting Circuit

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 VCC and Standby are

ON/OFF.

Table 1

C (µF)

nothing

0.47

4.7

Figure 2 How to use Muting Circuit

Muting ON/OFF Time

ON Time

under 1 µs

2 ms

19 ms

OFF Time

under 1 µs

2 ms

19 ms

9

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