ROHM BD5460GUL Technical data

Small-sized Class-D Speaker Amplifiers

Analog Input
Monaural Class-D Speaker Amplifier

BD5460GUL

●Description

BD5460GUL is a low voltage drive class-D monaural speaker amplifier that was developed for cellular phones, mobile
audio products and the others.LC-filter of speaker output is unnecessary, and the number of external components is three.
It is suitable for the application of battery drive because of high efficiency and low power consumption.
Also, stand-by current is 0µA (typ.), and fast transitions from standby to active with little pop noise. It is suitable for
applications that switch repeatedly between stand-by and active.

●Features

1) No LC filter required

2) Only three external components

3) High power 2.5W/4Ω/BTL (VDD=5V, RL=4Ω, THD+N=10%, typ.)

4) High power 0.85W/8Ω/BTL (VDD=3.6V, RL=8Ω, THD+N=10%, typ.)

5) Gain 6dB

6) Analog differential input / PWM digital output

7) Pop noise suppression circuitry

8) Built-in standby function

9) Protection circuitry (Short protection [Auto recover without power cycling], Thermal shutdown, Under voltage lockout)

10) Very small package 9-Bump WL-CSP (1.6*1.6*0.55mmMAX)

●Applications

Mobile phones, Mobile electronics applications

●Absolute Maximum Ratings(Ta=25℃)

Item Symbol Ratings Unit

Power Supply Voltage

Power Dissipation

Storage Temperature Range

STBY Terminal Input Range

IN+, IN- Terminal Input Range

*1 When mounted on a 50 mm×58mm Rohm standard board, reduce by 5.52 mW/°C above Ta = +25 °C.

●Operating Conditions

Item Symbol Ratings Unit

Power Supply Voltage VDD +2.5 ～ +5.5 V
Temperature Range Topr -40 ～ +85 ℃

※ This product is not designed for protection against radioactive rays

VDD

Pd

Ts tg

Vstby

Vin

7.0

690 *1

-55 ～ +150

-0.1～VDD+0.1

-0.1～VDD+0.1

V

mW

℃

V

V

No.10101EAT01

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© 2010 ROHM Co., Ltd. All rights reserved.

1/16

2010.06 - Rev.A

BD5460GUL

Technical Note

●Electric Characteristics

(Unless otherwise specified, Ta=25℃, VDD=3.6V, f=1kHz, RL=8Ω, AC item=LC Filter ; L=22µH, C=1µF )

Parameter Symbol

MIN. TYP. MAX.

Limits

Unit Conditions

Circuit current (No signal) ICC ― 2.0 4.0 mA Active mode, No load

Circuit current (Standby) I

― 0.1 2 µA Standby mode

STBY

Output power 1 PO1 450 680 ― mW BTL, f=1kHz, THD+N=1% *1

Output power 2 PO2 550 850 ― mW BTL, f=1kHz, THD+N=10% *1

Voltage gain GV 5.4 5.9 6.4 dB BTL

Power Supply Rejection Ratio P

45 53 ― dB BTL,f=1kHz, Vripple=0.1Vpp *2

SRR

Output offset voltage ΔVo -25 0 +25 mV Vin=0V, BTL

Switching Frequency fosc 175 250 325 kHz

Start-up time Ton 0.39 0.51 0.73 msec

Standby input Voltage

Standby input current

*BTL=Bridged Tied Load (Voltage between A3-C3.), *1;B.W.=400～30kHz,*2;DIN AUDIO

High-level V

Low-level V

High-level I

Low-level I

1.4 ― VDD V Active mode

STBYH

0 ― 0.4 V Standby mode

STBYL

6 12 18 µA V

STBYH

-5 0 5 µA V

STBYL

STBY

STBY

=3.6V

=0V

●Measurement Circuit Diagram

A

Vripple

10µ

VDD

VDD

B1 B2

PVDD

VSTBY

A

STBY

C2

Bias OSC

0.1µ

Vin

Vin

0.1µ

IN+

A1

IN-

C1

PWM

H­Bridge

OUT-

A3

OUT+
C3

22 µ H

1µ

8

22 µ H

1µ

A2GND B3

PGND

●Active / Standby Control

STBY Pin(C2pin)

Mode Pin level Conditions

Active H IC active

Standby L IC shutdown

VSE

V

V

V

BTL

V

VSE

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© 2010 ROHM Co., Ltd. All rights reserved.

2/16

2010.06 - Rev.A

BD5460GUL

●Package Outlines

●Block Diagram ●Pin Assignment Chart

STBY

C2

IN+

A1

IN-

C1

LOT No.

VDD

Bias OSC

GND

B1

PWM

A2

5460

B2

B3

PVDD

H­Bridge

PGND

WL-CSP ： VCSP50L1

OUT-

A3

OUT+

C3

(unit : mm)

PIN No. PIN 名

A1 IN+

A2 GND

A3 OUT-

B1 VDD

B2 PVDD

B3 PGND

C1 IN-

C2 STBY

C3 OUT+

BOTTOM VIEW TOP VIEW

Technical Note

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© 2010 ROHM Co., Ltd. All rights reserved.

3/16

2010.06 - Rev.A

BD5460GUL

●Application Circuit Example

H：Active

L：Shutdown

Audio
Input+

Differential
Input

Audio
Input-

H：Active

L：Shutdown

Audio
Input+

Differential
Input

Audio
Input-

H：Active

L：Shutdown

Audio
Input

10μ

VDD

B1

B2

PVDD

STBY

C2

IN+

A1

IN-

C1

Bias OSC

PWM

A2GND B3

PGND

Fig.1 Differential input for mobile phone

10μ

VDD

B1

B2 PVDD

STBY

0.1μ

0.1μ

0.1μ

0.1μ

C2

IN+

A1

IN-

C1

Differential input with coupling input capacitors

Fig.2

STBY

C2

IN+

A1

IN-

C1

Bias OSC

PWM

A2GND B3

VDD

B1

Bias OSC

PWM

A2GND B3

PGND

10μ

B2 PVDD

PGND

H­Bridge

Fig.3 Single-Ended input

H­Bridge

H­Bridge

Technical Note

OUT­A3

OUT+
C3

OUT­A3

OUT+
C3

OUT­A3

OUT+
C3

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© 2010 ROHM Co., Ltd. All rights reserved.

4/16

2010.06 - Rev.A

BD5460GUL

●Evaluation board Circuit Diagram

H：Active

L：Shutdown

Audio
Input+

0.1μ

Differential
Input

Audio
Input-

C2

0.1μ

C1

Please connect to GND line.

VDD

VDD

S1

STB Y

C2

IN+

A1

IN-

C1

U1

300k

Rin =100k

Rin= 100k

B1 B2

Bias OSC

PWM

GND PGND

A2

B3

Please connect to Power Supply
(VDD=+2.5～5.5V) line.

Please connect to Input Signal line.

Please connect to Speaker.

C3

10μ

PVDD

H­Bridge

Technical Note

OUT­A3

OUT+
C3

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© 2010 ROHM Co., Ltd. All rights reserved.

5/16

2010.06 - Rev.A

BD5460GUL

●Evaluation board Parts List

Qty. Item Description SMD Size

2 C1, C2 Capacitor, 0.1µF 0603

1 C3 Capacitor, 10µF A (3216)

1 S1 Slide Switch 4mm X 10.2mm

1 U1

1 PCB1

●Description of External components

Input coupling capacitor (C1,C2)

①

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.

fc

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.

1

IC, BD5460GUL,
Mono Class-D audio amplifier

Printed-circuit board,
BD5460GUL EVM

[Hz]

C1Ri2π

1.6mm X 1.6mm
WLCSP Package

― ―

Murata
GRM188R71C104KA01D

ROHM
TCFGA1A106M8R

NKK
SS-12SDP2

ROHM
BD5460GUL

Manufacturer/

Part Number

Technical Note

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© 2010 ROHM Co., Ltd. All rights reserved.

6/16

2010.06 - Rev.A