BA6892 [ROHM]
4-channel H-bridge type BTL driver for CD players; 4通道H桥型BTL驱动器的CD播放器
| 型号： | BA6892 |
| 厂家： | 
ROHM |
| 描述： | 4-channel H-bridge type BTL driver for CD players |
| 文件： | 总10页 (文件大小：141K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Optical disc ICs
4-channel H-bridge type BTL driver for
CD players
BA6892FP
The BA6892FP is a 4-channel H-bridge BTL driver for CD players. Independent power supplies for each predriver and
power driver assure efficient operation at low voltages. Each channel is independently mutable.
FApplications
CD players, CD-ROM drives and other optical disc devices
FFeatures
1) 4-channel BTL driver in a HSOP 28-pin package,
ideal for application miniaturization.
4) Independent power supply for each preamplifier and
power amplifier, for drives that operate efficiently on
low voltages.
2) Wide dynamic range.
3) Driver gain is adjustable with an attached resistor.
5) Power amplifier current drops to an extremely low
level when the preamplifier power supply is lowered,
allowing for a standby mode.
FRecommended operating conditions (Ta = 25_C)
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Optical disc ICs
BA6892FP
FBlock diagram
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Optical disc ICs
BA6892FP
FPin descriptions
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Optical disc ICs
BA6892FP
FInput / output circuits
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Optical disc ICs
BA6892FP
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCCPRE = VCCPOW = 4V, BIAS = 2V, RL = 8Ω,
RIN = 9.1kΩ)
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Optical disc ICs
BA6892FP
FMeasurement circuit
450
Optical disc ICs
BA6892FP
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Optical disc ICs
BA6892FP
FApplication example
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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).
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
(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.
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.
(3) Dead zone width is determined as follows:
Dead zone width = input resistance (attached resistor +
FElectrical characteristic curves
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Optical disc ICs
BA6892FP
FExternal dimensions (Units: mm)
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