STK4065 데이터 시트보기 (PDF) - SANYO -> Panasonic
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STK4065 Datasheet PDF : 9 Pages
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Test Circuit
STK4065
Notes for Applying the STK4065
(1) VCC max
The STK4065 is designed as an amplifier for car use
and its VCC max at the operating mode is set to 18V.
When this voltage is exceeded, the overvoltage protec-
tor will work to bring the circuit to OFF-state, deliver-
ing no output. The overvoltage protector is so designed
as to work at a voltage of 18V to 28V. The protector
works 100% at 28V. When designing an audio set, such
as home stereo, using a transformer power supply, con-
sider AC line regulation and be careful that 18V must
not be exceeded at the quiescent mode. If 18V is
exceeded, the overvoltage protector will work, generat-
ing an abnormal sound.
(2) Protectors
a) Output pin-to-VCC short, output pin-to-GND short pro-
tectors
The STK4065 contains protectors against output pin-
to-VCC short and output pin-to-GND short.
The output pin-to-VCC short protector works effec-
tively to protect the IC when the power switch is turned
ON at the output pin-to-VCC short state, but does not
work to protect the IC when output pin-to-VCC short is
forced to be provided at the normal operation mode
after the power switch is turned ON.
The output pin-to-VCC short protector is intended to
protect the IC against damage when pin-to-pin short
occurs in the assembly process.
If there is possibility that output pin-to-VCC short is
caused by the user, the auxiliary output pin-to-VCC
short protector shown on page 5 must be connected
externally. The output pin-to-GND short protector
works effectively to protect the IC against damage
when the power switch is turned ON at the output Pin-
to-GND short state and also when output pin-to-GND
short is forced to be provided at the normal operation
mode after the power switch in turned ON.
b) Thermal shutdown
The STK4065 contains thermal protectors.
The thermal protector detects abnormal temperature
rise caused when the IC operates abnormally (load
short, etc.), limits the input signal, and prevents tem-
perature from rising, preventing the IC from breaking
down in a short time. The thermal protector starts
working at approximately 135°C of substrate tempera-
ture Tc and turns OFF the input signal at approxi-
mately 175°C.
No. 2148—3/9
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