HA16116FP/FPJ, HA16121FP/FPJ

Rev.2.0, Sep.18.2003, page 4 of 33

Pin Functions

Pin No.

Symbol

Function

1

S.GND

Signal circuitry*

2C

T

Timing capacitance (triangle wave oscillator output)

3R

T

Timing resistance (for bias current synchronization)

4

IN(+)1

Error amp. noninverting input (1)

5

IN(–)1

Error amp. inverting input (1)

6

E/O1

Error amp. output (1)

7

DB1

Dead band timer off period adjustment input (1)

8

CL1

Overcurrent detection input (1)

9

OUT1

PWM pulse output (1)

Channel 1

10

P.GND

Output stage*

11

P.V

IN

Output stage*

12

OUT2

PWM pulse output (2)

13

CL2

Overcurrent detection input (2)

14

DB2

Dead band timer off period adjustment input (2)

15

E/O2

Error amp. output (2)

16

IN(–)2

Error amp. inverting input (2)*

2

Channel 2

17

ON/

OFF

IC on/off switch input (off when grounded)

18

TIM

Setting of intermittent operation timing when overcurrent is detected

(collector input of timer transistor)

19

Vref

2.5 V reference voltage output

20

S.V

IN

Signal circuitry*

Notes: 1. Here “output stage” refers to the power MOS FET driver circuits, and “signal circuitry” refers to all

other circuits on the IC. Note that this IC is not protected against reverse insertion, which can

cause breakdown of the IC between V

Be careful to insert the IC correctly.

2. Noninverting input of the channel 2 error amp is connected internally to Vref.