BA6892 Просмотр технического описания (PDF) - ROHM Semiconductor

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BA6892

4-channel H-bridge type BTL driver for CD players

ROHM Semiconductor 

Optical disc ICs

BA6892FP

FOperation notes

(1) The BA6892FP has an internal thermal shutdown

circuit. Output current is muted when the chip tempera-

ture exceeds 175_C (typically) and restored when the

chip temperature falls to 150_C (typically).

(2) The mute pin operates normally when open and at

the LOW level (below 0.5V), but mutes the output when

raised to the HIGH level (above 2V). A high impedance

is output during muting. The mute pin functions indepen-

dently for each channel.

(3) Dead zone width is determined as follows:

Dead zone width = input resistance (attached resistor +

internal input resistor 1kΩ) 0.2µA

Dead zone width various according to the gain setting as

defined in the preceding equation.

Example: When attached input resistor = 9.1kΩ, VDB =

(9.1k+1k) 0.2µ 2mV

Output pins output high impedance in a dead zone equal

to AmV (total for positive and negative).

(4) Be sure to connect the IC to a 0.1µF bypass capaci-

tor to the power supply, at the base of the IC.

(5) Connect the radiating fin to an external ground.

FElectrical characteristic curves

453

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