NJU8713V 查看數據表（PDF） - Japan Radio Corporation

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产品描述 (功能)

生产厂家

NJU8713V

2V Operation Switching Driver for Class D Amplifier

Japan Radio Corporation  

NJU38575153

FUNCTIONAL DESCRIPTION

(1) Signal Output

PWM signals of L channel and R output from OUT1 and OUT2 terminals respectively. These signals are

converted to analog signal by external 2nd-order or over LC filter. The output driver power supplied from VDDO

and VSSO are required high response power supply against voltage fluctuation like as switching regulator

because Output T.H.D is effected by power supply stability.

(2) Master Clock

Master clock (MCK) synchronizes the Audio signal inputs (IN1 and IN2). The setup time and the hold time

should be kept in the AC characteristics because IN1 and IN2 are fetched with the rising edge of MCK. MCK

requires jitter-free or jitter as small as possible because the jitter downs S/N ratio.

OUT1 and OUT2 occur the pop noise when MCK is stopped in operation without standby mode. Therefore,

the standby mode should be set before MCK stop.

(3) Output Control

Output circuit is selected by the conditions of EN1 and EN2 terminals.

EN2

EN1

Output State of OUT1 & OUT2

0

0

Standby(High impedance)

0

1

Audio Signal Output

1

0

BPZ Output

1

1

Beep Signal Output

(4) Beep Function

The beep signal must be input before the rising edge of EN2 signal and must be stopped after the falling edge

of EN2 signal.

EN1

EN2

MCK

BEEP

Audio Signal Output

Beep Signal Output

Audio Signal Output

Ver.2004-06-02

-3-

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