NCP1000P 查看數據表（PDF） - ON Semiconductor

零件编号

产品描述 (功能)

比赛名单

NCP1000P

Integrated Off−Line Switching Regulator

ON Semiconductor 

NCP1000, NCP1001, NCP1002

FUNCTIONAL PIN DESCRIPTION

Pin

Function

Description

1

VCC

Positive input supply voltage. This pin is connected to an external capacitor for energy storage.

The startup circuit sources current out of this pin to initially charge the capacitor. When the

voltage reaches the upper threshold limit of the undervoltage lockout circuit, the startup circuit

will turn off, and the power supply will begin operation. Power is then supplied to the chip via

this pin, by virtue of the auxiliary winding.

2

Feedback Input The error signal from the optocoupler is fed into this input. It is loaded with a 2.7 kW resistor

which converts the opto current into a voltage. There is a 7.0 kHz, single pole, low pass filter

between this pin and the error amp input. A 10 volt clamp is also connected to this pin to protect

the device from ESD damage or overvoltage conditions.

3, 6, 7, 8

Ground

Ground reference pin for the circuit. These pins are part of the integrated circuit leadframe and

are an integral part of the heat flow path on the PDIP−8 package.

4

Startup

This pin is connected to the bulk DC input voltage supply. It feeds an internal current source that

initially charges up the VCC capacitor on power up.

5

Power Switch Circuit The internal power switch circuit is connected between this pin and ground. This pin connects

directly to one end of the transformer primary winding.

MAXIMUM RATINGS (Notes 1 and 2)

Rating

Symbol

Value

Power Switch Circuit (Pin 5)

Drain Voltage Range

Drain Current Peak During Transformer Saturation

Power Supply Voltage Range (Pin 1)

Feedback Input (Pin 2)

Voltage Range

Current

Thermal Resistance

P Suffix, Plastic Package Case 626

Junction−to−Lead

Junction−to−Air, 2.0 Oz. Printed Circuit Copper Clad

0.36 Sq. Inch

1.0 Sq. Inch

VDS

IDS(pk)

Vclp

VI(fb)

lfb

RqJL

RqJA

*0.3 to 700

2.0 Ilim Max

*0.3 to 10

*0.3 to 10

100

5.0

45

35

Operating Junction Temperature

TJ

*40 to 125

Storage Temperature

Tstg

*65 to +150

1. This device series contains ESD protection and exceeds the following tests:

Pins 1−3: Human Body Model 2000 V per MIL−STD−883, Method 3015.

Machine Model Method 200 V.

Pins 4 and 5 are the HV startup and the drain of the LDMOS device, rated only to the max rating of the part , or 700 V.

2. This device contains Latchup protection and exceeds $200 mA per JEDEC Standard JESD78.

Unit

V

A

V

V

mA

°C/W

°C

°C

http://onsemi.com

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