LA4192 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LA4192

1 to 2.3W 2-Channel of Power Amplifier

SANYO -> Panasonic 

LA4192

Continued from preceding page.

VG=20 log

R1

Rf

+6 [dB]

If designated for Rf=27Ω, VG=56dB will be obtained which is excessive ; it is recommended that RNF=51Ω be

designated when bridge amplifier is connected.

2. Crosstalk

As LA4192 is used at a voltage gain around 50dB, feedback is shallow. It is recommended that the bridge amplifier

output pin (pin 1) be grounded when used for 2-channel.

3. Starting time

A built-in muting circuit suppresses shock noise when power is turned on. It utilizes time constant of C9 (de-

coupling capacitor), and built-in charging circuits for C1 and C2 (NF capacitors). The starting time depends on

capacitances of C1 (C2) and C9 as shown below :

4. Cautions for use of the IC

1. When used close to the maximum ratings, even a slight variation in conditions can cause the maximum ratings to

be surpassed. This leads to breakdown failures. Be sure to provide for sufficient margins to cover variations in

power voltages. Use the IC in a range that never exceeds the maximum ratings.

2. Inter-pin shortcircuits

Turning the power on with inter-pin shortcircuits causes breakage or deterioration, so that when mounting the IC

on a circuit board, carefully inspect to avoid inter-pin shorts caused by soldering, before turning the power on.

3. Short-circuited loads

When used for a prolonged period with a shorted load, breakage or deterioration can result. Under no circum-

stance should loads be left shorted.

4. When used in a radio or radio-cassette recorder, maintain a sufficient distance between the IC and a bar antenna.

5. In making a circuit board, refer to the sample printed pattern.

No.919–5/11

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