NJM2776 Просмотр технического описания (PDF) - Japan Radio Corporation

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NJM2776

Headphone Amplifier for Portable Audio

Japan Radio Corporation  

NJM2776

s APPLICATION NOTE

1. Procedure for Supplying Power

Supply the power to first V+2(Battery side) and then V+1(Step-up Converter side).

2. Input Dynamic Voltage Range

The reference voltage is fixed at 0.6V. Therefore input dynamic voltage range is not proportion to the power

supply voltage.

The input signal over dynamic range makes distortion. For prevent the distortion, adjust the maximum input

signal level.

3. Charge Sequence

Pop noise may not be happened with mode switch operation once output voltage becomes reference voltage.

The "Charge Sequence" may shorter the time for power up initialization.

Charge Sequence: To set mode switch from standby to active during power up initialization, activate rapid

charge circuit for stabilizing the output voltage.

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