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SG6518 • Rev. 1.0.0

3

Pin Configuration

Figure 3. Pin Configuration

Pin Definitions

Pin #

Name

Description

1

GND

Ground.

2

FPO

Fault protection output. Output signal to control the primary PWM IC through an opto-coupler.

When FPO is LOW, the PWM IC is enabled.

3

PSON

Remote on/off logic input from CPU or main-board. The power supply is turned on/off after 13ms

delay.

4

VSV1

V1 voltage sense input.

(4)

5

ADJ-V1

V1 over-voltage control sense input.

6

RI

7

ADJ-V2

V2 over-voltage control sense input.

8

VSV2

V2 voltage sense input.

9

ISV2

V2 over-current protection sense input. In typical applications, this pin is connected to the

positive end of a current shunt through one resistor. When the voltage on ISV2 is higher than

that of VSV2 by 6mV, OCP is enabled.

10

ISV1

VSV1 over-current protection sense input. In typical applications, this pin is connected to the

positive end of a current shunt through one resistor. When the voltage on ISV1 is higher than

that of VSV1 by 6mV, OCP is enabled.

11

IS12

12V over-current protection sense input. In typical applications, this pin is connected to the

positive end of a current shunt through one resistor. When the voltage on IS12 is higher than

that of VS12 by 6mV, OCP is enabled.

12

VS12

12V over-voltage control sense input.

13

IS5

5V over-current protection sense input. In typical applications, this pin is connected to the

positive end of a current shunt through one resistor. When the voltage on IS5 is higher than that

of VS5 by 6mV, OCP is enabled.

14

VS5

5V over-voltage control sense input.

15

VDD

Supply voltage, 4V ~ 15V. For general applications, it is connected to 5V-standby for supply

voltage.

16

OTP

For over-temperature protection. An external NTC thermistor is connected from this pin to

ground. The impedance of the NTC decreases at high temperatures. Once the voltage of the

OTP pin drops below a fixed limit of 1.2V, FPO is open-drain output.

Note:

4.

The VSV1 pin is the power pin for the two OCP comparators; it must be higher than VSV2.