ROHM BD7836EFV Technical data

A

Class-AB Speaker Amplifiers

1.9W+1.9W
Stereo Speaker Amplifier

BD7836EFV

●Description

BD7836EFV is a Class-AB stereo speaker amplifier, developed for note-book PC, desktop PC, portable devices and others.
Class-AB amplifier has no EMI noise. Power package HTSSOP-B20 can realize high output power.
Low circuit current at active mode reduce consumption of battery. Shutdown current is 0.1µA typically, and pop noise level
when shutdown turns on and off is very small. This device is suitable for the application that often changes mode between
“shutdown state” and “active state”.

●Features

1) High power 1.9W typ. (VDD=5V, R
High power 1.2W typ. (VDD=5V, R

2) Gain selectable by the external control (6,10,15.6,21.6dB)

3) Pop noise suppression circuitry

4) Shutdown function (also Mute function) [I

5) Protection circuitry (Thermal shutdown, Under voltage lockout)

6) Power Package with thermal pad HTSSOP-B20

●Applications

Note-book PC, Desktop PC, etc.

●Absolute maximum ratings (Ta=+25℃)

Parameter Symbol Ratings Unit

Power Supply Voltage VDDmax 7.0 V

Power Dissipation Pd

L=4Ω, THD+N=1%, stereo input)
L=8Ω, THD+N=1%, stereo input)

=0.1µA(typ.)]

sd

1

3.2 *2 W

*1

W

No.10077EAT07

Storage Temperature Tstg -55 ～ +150 ℃

Input Terminal Input Voltage Range *3 Vin -0.3～VDD+0.3 V

Control Terminal Input Voltage Range *4 Vctl -0.3～VDD+0.3 V

*1 70mm×70mm×1.6mm FR4 1-layer glass epoxy board(Copper on top layer 0%)
Derating in done at 8mW/℃ for operating above Ta=25℃. There are thermal via on the board.
*2 70mm×70mm×1.6mm FR4 4-layer glass epoxy board (Copper on bottom 2 and 3 layer 100%)
Derating in done at 25.6mW/℃ for operating above Ta=25℃. There are thermal via on the board.
*3 Input Terminal (LIN+, LIN-, RIN+, RIN-)
*4 Control Terminal (

●Operating conditions

Power Supply Voltage

Temperature

* These products aren’t designed for protection against radioactive rays.

SHUTDOWN

Parameter

, GAIN0, GAIN1)

Symbol Range Unit

VDD +4.5 ～ +5.5 V

Topr -40 ～ +85 ℃

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2010.07 - Rev.

BD7836EFV

A

●Electric characteristic (Unless otherwise specified, Ta=+25℃, VDD=+5.0V, RL=8Ω, AC stereo input)

Technical Note

Parameter Symbol

Min. Typ. Max.

Circuit current (Active) Icc ― 5 10 mA

Circuit current (Shutdown) Isd ― 0.1 2.0 µA

Limits

Unit Condition

IC active, No load

SHUTDOWN

=Hi

IC Shutdown

SHUTDOWN

=Lo

<Speaker amplifier>

Output power 1 PO1 0.7 1.2 ― W RL=8Ω, BTL, f=1kHz, THD+N=1% *1

Output power 2 PO2 ― 1.9 ― W RL=4Ω, BTL, f=1kHz, THD+N=1% *1

5.5 6.0 6.5 dB BTL, GAIN0=GAIN1=L

Gain GV

9.5 10 10.5 dB BTL, GAIN0=L, GAIN1=H

14.6 15.6 16.5 dB BTL, GAIN0=H, GAIN1=L

20.6 21.6 22.6 dB BTL, GAIN0=GAIN1=H

63 90 117 kΩ GAIN0=GAIN1=L

Input resistance R

IN

49 70 91 kΩ GAIN0=L, GAIN1=H

31 45 59 kΩ GAIN0=H, GAIN1=L

17 25 33 kΩ GAIN0=GAIN1=H

Supply ripple rejection ratio PSRR 62 68 ― dB

Vripple=0.2Vp-p,C
f=1kHz, BTL

=0.47µF

BYP

Output noise Vnoise ― 16 80 µVrms BTL, f=1kHz, 20-20kHz

S/N SN ― 105 ― dB BTL, Po=1W, BTL, f=1kHz, 20-20kHz

Output DC offset voltage ⊿Vo ― 0 ±25 mV

<Control terminal (

Control terminal
Input voltage

*1: B.W.=400～30kHz， BTL：The voltage between 4pin and 8pin, 14pin and 18pin.

SHUTDOWN

,GAIN0,GAIN1)>

Hi level VIH 2.0 ― VDD V

Lo level VIL 0 ― 0.8 V

●Control terminal’s settings

SHUTDOWN

IC condition

Hi Active

Lo Shutdown

GAIN0 GAIN1 Gain Input resistance

Lo Lo 6dB 90kΩ (TYP.)

Lo Hi 10dB 70kΩ (TYP.)

Hi Lo 15.6dB 45kΩ (TYP.)

Hi Hi 21.6dB 25kΩ (TYP.)

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2010.07 - Rev.

BD7836EFV

A

●Package outlines

BD7836

Lot No.

Fig.1 HTSSOP-B20

●Block diagram ●Pin assignment table

Pin

RIN-

ROUT+

Terminal name Function

No.

1 GND Ground

2 GAIN0 Bit 0 of gain select

RIN+

3 GAIN1 Bit 1 of gain select

4 LOUT+ Left channel positive output

ROUT-

5 LIN- Left channel negative differential input

6 PVDD Supply voltage terminal

GAIN0

GAIN1

LIN-

Gain

Control

Depop

Circuitry

Power

Management

PVDD

VDD

BYPASS

SHUTDOWN

GND

LOUT+

7 RIN+ Right channel negative differential input

8 LOUT- Left channel negative output

9 LIN+ Left channel positive differential input

10 BYPASS

11 GND Ground

12 NC No connection

LIN+

LOUT-

13 GND Ground

14 ROUT- Right channel negative output

15 PVDD Supply voltage terminal

16 VDD Supply voltage terminal

17 RIN- Right channel negative differential input

Fig.2

18 ROUT+ Right channel positive output

SHUTDOWN

19

20 GND Ground

Technical Note

(unit : mm)

Tap to voltage divider for internal
midsupply bias generator

Places IC in shutdown mode when
held low

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

2010.07 - Rev.

BD7836EFV

A

●Measurement circuit diagram

Right

Line

Input

Signal

C

0.47µＦ

C

RIN

0.47µＦ

Left

Line

Input

Signal

C

0.47µＦ

C

LIN

0.47µＦ

Technical Note

-

RIN

18

17

RIN-

+

+

7

RIN+

2

GAIN0

GAIN1

3

-

LIN

5

LIN-

+

LIN+

98

Gain

Control

-

Power

Management

+

-

Fig.3

ROUT+

ROUT-

PVDD

VDD

BYPASS

SHUT-

DOWN

GND

LOUT+

LOUT-

14

6.15
C

16

C

10

C

19

To

System Control

4

SR

0.1µＦ

SR

0.1µＦ

BYP

0.47µＦ

1,11,
13,20

RL

RL

V

DD

V

DD

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

2010.07 - Rev.

BD7836EFV

A

Technical Note

●Application circuit example

Right

Line

Input

Signal

C

RIN

0.47µＦ

Left

Line

Input

Signal

0.47µＦ

Right

Line

Input

Signal

0.47µＦ

0.47µＦ

Left
Line

Input

Signal

C

0.47µＦ

C

0.47µＦ

C

-

RIN

0.47µＦ

17

RIN-

+

+

7

RIN+

GAIN0

2

GAIN1

3

-

C

LIN

0.47µＦ

LIN-

5

C

LIN+

LIN+

98

Gain

Control

-

+

-

Power

Management

ROUT+

ROUT-

PVDD

VDD

BYPASS

SHUT-

DOWN

GND

LOUT+

LOUT-

18

14

6.15

16

10

19

To

4

V

C

SR

0.1µＦ

V

C

SR

0.1µＦ

C

BYP

0.47µＦ

System Control

1,11,

13,20

DD

DD

Fig.4 Single Ended inputs

C

RIN-

18

17

RIN-

+

C

RIN+

7

RIN+

GAIN0

2

GAIN1

3

LIN-

LIN-

5

LIN+

LIN+

98

Gain

Control

-

+

-

Power

Management

ROUT+

ROUT-

PVDD

VDD

BYPASS

SHUT-

DOWN

GND

LOUT+

LOUT-

14

6.15

16

10

19

To

4

V

C

SR

0.1µＦ

V

C

SR

0.1µＦ

C

BYP

0.47µＦ

System Control

1,11,

13,20

DD

DD

Fig.5 Differential inputs

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

2010.07 - Rev.

BD7836EFV

A

●Evaluation board circuit diagram

C

RIN-

0.47μＦ

C

RIN+

0.47μＦ

17

RIN-

+

7

RIN+

-

2

3

GAIN0

GAIN1

Gain

Control

Power

Management

C

LIN-

0.47μＦ
LIN-

5

C

LIN+

0.47μＦ
LIN+

98

+

-

Please connect speaker.

Please connect to GND.

Please connect to

Power Supply

(VDD=+4.5～5.5V) line.

Use these solder jumper
for connecting the control
terminal to GND.

Use these solder jumper
for connecting the control
terminal to VDD.

Fig .6

Please connect speaker.

●Evaluation board partts list

Number Part name Type, Value SMD size

4 CLIN+/-,CRIN+/- Capacitor, 0.47μF 1608

2 CSR Capacitor, 0.1μF 1608

1 CBYP Capacitor, 0.47μF 1608

1 U1

Class-AB stereo speaker Amplifier

1 PCB1

IC, BD7836EFV,

Printed-circuit board

BD7836EFV

PKG:HTSSOP-B20

18

ROUT+

ROUT-

14

PVDD

6.15
C

SR

0.1μＦ

16

VDD

BYPASS

SHUT­DOWN

GND

LOUT+

LOUT-

C

SR

0.1μＦ

10

C

0.47μＦ

BYP

19

1,11,

13,20

4

GRM188R71C474KA01D

GRM188R71C104KA01D

GRM188R71C474KA01D

BD7836EFV-E2

― ―

Technical Note

Please connect ito

input signal line.

Manufacturer/

Part number

Murata

Murata

Murata

ROHM

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

2010.07 - Rev.