Technical Note

3/16

BH76906GU, BH76909GU, BH76912GU, BH76916GU, BH76706GU

www.rohm.com

2009.03 - Rev.A

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

●

Test Circuit Diagram

●

Block Diagram

●

Operation Logic

BH769xxGU

STBY Pin Logic

Operating Mode

H

Active

L

Standby

OPEN

BH76706GU

STBY Pin Logic

Operating Mode

SW1

SW2

H

Standby

OFF

OFF

M

Input (Record)

ON

OFF

L

Active (Playback)

OFF

ON

※

Use of the BH76706GU with the STBY pin OPEN is inappropriate

※

A test circuit is a circuit for shipment inspection and differs from an application circuit example.

Fig. 1

V

A

A3

B3

C3

A1

B1

C1

CHARGE

PUMP

OUT

NVCC

IN

150k

A2

C2

VCC

VIN

STBY

VOUT

C_PLUS

C_MINUS

NVCC

GND

75Ω

10u

0.01u

(VCC)

0.1u

50Ω

75Ω

1.0uF

1.0uF

V

LPF

A

V

V

A

A3

B3

C3

A1

B1

C1

CHARGE

PUMP

OUT

NVCC

IN

150k

A2

C2

VCC

VIN

STBY

VOUT

C_PLUS

C_MINUS

NVCC

GND

75Ω

10u

0.01u

(VCC)

75Ω

1.0uF

1.0uF

V

LPF

0.1u

A

50Ω

V

100Ω

A

V

A

A

6dB

6/9/12/16.5dB

A3

B3

C3

A1

B1

C1

CHARGE

PUMP

OUT

NVCC

IN

150k

A2

C2

VCC

VIN

STBY

VOUT

C_PLUS

C_MINUS

NVCC

GND

LPF

6/9/12/16.5dB

A3

B3

C3

A1

B1

C1

CHARGE

PUMP

OUT

NVCC

IN

150k

A2

C2

VCC

VIN

STBY

VOUT

C_PLUS

C_MINUS

NVCC

GND

LPF

6dB

(a) BH76906/09/12/16GU

(b) BH76706GU

Fig. 2

(a) BH76906/09/12/16GU

(b) BH76706GU

SW1

SW2

SW1

SW2

V