BD7830NUV Rohm, BD7830NUV Datasheet - Page 6

• Manufacturer Part Number: BD7830NUV
• Description: 1.1W to1.5W Monaural Speaker Amplifier
• Manufacturer: Rohm

●Description of operations
BD7830NUV
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①ON/OFF operation by STBY pin
②ON/OFF control by shorting of VCC and STBY pins
Once VCC = H, when STBY = L → H then BIAS and output (OUT) are activated.
Once BIAS has become stable (= 1/2 VCC), output (OUT) fades in (FADE IN).
Once STBY = H → L, output (OUT) starts to fade out (FADE OUT), and when fade-out ends, the BIAS falls.
When VCC = STBY = L → H, BIAS is activated. During low power mode (VCC < 1.78 V) protection is used to keep output
(OUT) at low level, and FADE IN occurs when this protection is canceled. When VCC = STBY = H → L, output (OUT) falls
without FADE OUT.
BIAS
VCC
STBY
OUT
Audio
Input
VCC
STBY
BIAS
OUT
Audio
Input
Standby
Delay
(internally fixed)
Delay
(internally
fixed
FADE IN
Active
Under voltage
protection
1.78V (typ)
6/17
FADE OUT
Standby
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Normal input
mode
Technical Note
2010.06 - Rev.A