NCP1001

Features:

• Highly Integrated Solution
• Operates Over Universal Input Voltage Range (85 Vac to 265 Vac)
• Onboard 700 Volt Power Switch Circuit
• Minimal External Parts Required
• Input Undervoltage Lockout with Hysteresis
• Very Low Standby Current
• No Minimum Load Requirement
• Opto Failsafe Shutdown Circuit


Application

• Cell Phone Chargers
• Wall Adapters
• Onboard ACDC Converters


Pinout




Specifications

Rating	Symbol	Value	Unit
Power Switch Circuit (Pin 5)    Drain Voltage Range    Drain Current Peak During Transformer Saturation	VDS IDS(pk)	-0.3 to 700 2.0 Ilim Max	V A
Power Supply Voltage Range (Pin 1)	Vclp	-0.3 to 10	V
Feedback Input (Pin 2)    Voltage Range    Current	VI(fb) lfb	-0.3 to 10 100	V mA
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   T Suffix, Plastic Package Case 314D      Junction to Case      Junction to Air	RJL RJA RJC RJA	5.0 45 35 2.0 65	/W
Operating Junction Temperature	TJ	-40 to 125
Storage temperature	TS	-65 to +150

1. This device series contains ESD protection and exceeds the following tests:
      Pins 13: Human Body Model 4000 V per MILSTD883, Method 3015.
                     Machine Model Method 400 V.
     Pins 4, 5: Human Body Model 1000 V per MILSTD883, Method 3015.
                    Machine Model Method 400 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.

 

Description

The NCP1000 through NCP1002 series of integrated switching regulators, combine a fixed frequency PWM controller with an integrated high voltage power switch circuit. This chip allows for simple design and minimal parts count for very low cost applications which utilize an ac input. This NCP1000  chip is designed to power a single ended topology, typically a discontinuous mode flyback, with secondary side sensing.

The NCP1000  internal high voltage switch circuit and startup circuit can function in continuous operation over a wide range of inputs, from 85 Vac to 265 Vac, and thus can be used in any existing power system in the world. Though inexpensive, these devices include a number of features such as undervoltage lockout, overtemperature protection, bandgap reference and leading edge blanking that make them an excellent value.