BD5460GUL(2009) 查看數據表（PDF） - ROHM Semiconductor

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BD5460GUL
(Rev.:2009)

2.5W Monaural Class-D Speaker Amplifier for Differential Analog Input

ROHM Semiconductor 

BD5460GUL

Technical Note

●Evaluation board Circuit Diagram

VDD

C3

10μ

Differential

Input

H：Active

L：Shutdown

U1

S1

STBY

C2

VDD B1

B2 PVDD

Bias

OSC

Audio

Input+

Audio

Input-

0.1μ

C2

0.1μ

C1

300k

IN+ Rin=100k

A1

IN-

C1

Rin=100k

PWM

H-

Bridge

Please connect to GND line.

Please connect to Power Supply

(VDD=+2.5～5.5V) line.

OUT-

A3

OUT+

C3

GND A2

B3 PGND

Please connect to Input Signal line.

Please connect to Speaker.

●Evaluation board Parts List

Qty.

Item

Description

SMD Size

Manufacturer/

Part Number

2

C1, C2

Capacitor, 0.1µF

0603

Murata

GRM188R71C104KA01D

1

C3

Capacitor, 10µF

A (3216)

ROHM

TCFGA1A106M8R

1

S1

Slide Switch

4mm X 10.2mm

NKK

SS-12SDP2

1

U1

IC, BD5460GUL,

1.6mm X 1.6mm

Mono Class-D audio amplifier WLCSP Package

ROHM

BD5460GUL

1

PCB1

Printed-circuit board,

BD5460GUL EVM

―

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●Description of External components

① Input coupling capacitor (C1,C2)

It makes a Input coupling capacitor 0.1µF.

Input impedance is 100kΩ (Typ.).

It sets cut-off frequency fc by the following formula by input coupling capacitor C1 (=C2) and input impedance Ri.

1

fc 

[Hz]

2π  Ri  C1

In case of Ri =100kΩ, C1 (=C2) =0.1µF, it becomes fc = about 16 Hz.

② Power decoupling capacitor (C3)

It makes a power decoupling capacitor 10 µF.

When making capacitance of the power decoupling capacitor, there is an influence in the Audio characteristic.

When making small, careful for the Audio characteristic at the actual application.

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© 2009 ROHM Co., Ltd. All rights reserved.

5/15

2009.07 - Rev.A

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