Datasheet > BD5461GUL_10

BD5461GUL_10

更新时间： 2022-10-15 20:08:14

品牌	Logo	应用领域
罗姆 - ROHM		放大器
页数	文件大小	规格书
17页	423K
描述
Analog Input Monaural Class-D Speaker Amplifier

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数据手册

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BD5461GUL_10 数据手册

Technical Note

BD5461GUL

●The way of evaluating Audio characteristic

Evaluation Circuit Diagram

VDD

0.1μ

10μ

VDD

PVDD

H：Active

STBY

L：Shutdown

Bias

OSC

300k

Audio

Input+

Measument Instrumen

OUT- 22μH

IN+

0.1μ

Ri=75k

1μF

Audio

Precision

etc

0.1μ

H-

Bridge

R_L

BTL

Differential

Input

PWM

Audio

Input-

OUT+

IN-

Ri=75k

22μH

RL=Speaker Load

GND

PGND

When measuring Audio characteristics, insert LC filter during the output terminal of IC and the speaker load and measure it.

Arrange LC filter as close as possible to the output terminal of IC.

In case of L=22μH, C=1μF, the cutoff frequency becomes the following.

fc 



 34kHz

2 π LC 2 π 22μH1μF

Use a big current type - Inductor L.

(Reference)

TDK: SLF12575T-220M4R0

www.rohm.com

2010.06 - Rev.A

8/16

1...5 6 789 10 11...17

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