AN7199Z Просмотр технического описания (PDF) - Panasonic Corporation

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AN7199Z

Dual 20 W BTL power IC for car audio

Panasonic Corporation 

ICs for Audio Common Use

AN7199Z

s Technical Information (continued)

[2] Application note (continued)

12. Precautions on misuse (continued)

3) Destruction mode for the AN7198Z, AN7199Z

The AN7198Z, AN7199Z are the power ICs with high breakdown withstanding voltage but it has been

found that the destruction occurs under special conditions.

(1) GND-open short-circuit to GND

Short-circuit of the output terminal to the GND terminal of power supply when GND terminal of the

IC is open, or short-circuit to GND when the GND terminal of the IC is over 0.7 V higher than the short-

circuited output terminal.

At that time, if VCC = more than 16 V and a voltage is also applied to STB terminal, then the destruction

occurs.

(2) Short-circuit to VCC of the plus and minus side output terminals at the same time

If short-circuit to VCC fault occurs on both the plus and minus side output terminals at the same time

with a short-circuit resistor which does not actuate the protection circuit. The power GND terminal

current may exceed 10 A and the wire melts down since the current capacity of Au wire is exceeded.

(3) VCC − GND reverse connection

Parasitic device is created everywhere and the circuit destruction takes place.

s Application Circuit Example

Ch.1 GND 3

Ch.1 Out (−) 4

Ch.1 Out (+) 2

14 Ch.2 GND

13 Ch.2 Out (−)

15 Ch.2 Out (+)

17

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