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NCP1225

Low Standby Power SMPS Controller

ON Semiconductor 

NCP1225

PIN FUNCTION DESCRIPTION

Pin

Symbol

Description

1

VCC

This pin is the supply of the IC. When voltage at this pin is higher than 12 V typical, the operation will

be activated.

2

GND

This pin is the ground of the primary side of the system.

3

VDRIVE

This pin is also used to detect the current status of secondary winding.

4

CS

The Current Sense pin senses the voltage developed across the current sensing resistor in series with

the power MOSFET. This information is used to terminate the output switch conduction cycle.

5

GATE

Controller output to the gate of the power MOSFET.

MAXIMUM RATINGS

Rating

Supply Voltage, VCC

Gate Output Current, Source Current (Note 1)

Gate Output Current, Sink Current (Note 1)

Thermal Characteristics

TSOP−5 Plastic Package, Case 483

Thermal Resistance, Junction−to−Air

Current Sense, CS Input Voltage

VDRIVE Input Voltage

Gate Voltage

Operating Junction Temperature

Operating Ambient Temperature

Storage Temperature Range

ESD Capability, HBM Model

ESD Capability, Machine Model

1. Maximum package power dissipation limits must be observed.

Symbol

VCC

IO_SRC

IO_SINK

RqJA

VCS

VDRIVE

VGATE

TJ

TA

Tstg

−

−

Value

−0.3 to 16

350

450

250

−0.3 to 10

−0.3 to 10

−0.3 to 16

−25 to +150

−25 to +105

−65 to 150

2.0

200

Unit

V

mA

mA

°C/W

V

V

V

°C

°C

°C

KV

V

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