STK404-200-E

No. A1491-9/11

Applications

Standby circuit

Use the current limiting resistor R1 (*1) so that the voltage applied to the Stand-by pin (pin #1) does not exceed the

maximum rating voltage.

This pin has a function to release the latch when it is set to the ground level.

Overcurrent Protection Circuit

Overcurrent protection is activated if VOC

≈ 0.5V (typ) is applied to OC (#9). The HIC shuts down (latch mode) 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.

Sample Application Circuit

* See "Application Circuit" for recommended values.

+

STK404-200-E

13

12

11

10

9

8

7

6

5

4

3

2

1

ERROR

OC

-Pre

-VCC +VCC

OUT+

OUT-

+Pre

SUB

/GND

IN

NF

ST

BY

DC

Output to speaker

STK404-200-E

13

12

11

10

9

8

7

6

5

4

3

2

1

Standby control voltage (V)

ERROR

OC

-Pre

-VCC +VCC

OUT+

OUT-

+Pre

SUB

/GND

IN NF

ST

BY

(*1) R1

Restriction resistor

DC

(*2) R2=4.7k

Ω

Bias circuit

(predriver IC)

Pin 1 VST voltage: -0.3V to +5.5V (max. rating)

Operating: H (VST

>2.5V)

Standby: L (VST

<0.6V)

Input current (Ist)

Operating: 0.4mA to 1mA