stk404-200-e Sanyo Semiconductor Corporation, stk404-200-e Datasheet - Page 10

• Manufacturer Part Number: stk404-200-e
• Description: One-channel Class Audio Power Amplifier
• Manufacturer: Sanyo Semiconductor Corporation

DC Offset Detector Circuit
DC offset protection is activated if VDC(+) or VDC(-)≈0.5V (typ) is applied to DC (#8). The HIC shuts down and the
state of the error pin switches from high to low. The (open collector output) latch mode is cleared by setting the pin to
the ground level.
Set the protection level with the voltage dividing resistors R1 and R2 and determine the time constant value of C so that
the IC will not malfunction when generating the audio signals.
Sample Application Circuit
* Please refer to “13.Application circuit” about recommended Value.
Error Indicator (Open Collector)
The state of the ERROR pin (#2) switches from high to low (open collector output) when a protection circuit is
activated.
+V (to +V CC )
ERROR
H: Normal condition
L: Error
ST
BY
1
ST
BY
ERROR
1
2
ERROR
error (max) 20mA
2
IN
3
IN
3
NF
4
NF
4
SUB
/GND
STK404-200-E
STK404-200-E
5
STK404-200-E
SUB
/GND
5
-Pre
6
-Pre
6
+Pre
C
7
Output to speaker
+Pre
7
DC
8
DC
R2
8
OC
9
OC
R1
9
-V CC +V CC
10
-V CC +V CC
10
11
11
OUT-
12
OUT-
12
OUT+
13
OUT+
13
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