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NCP1252ADR2G Integrated Circuit Chip Current Mode PWM Controller

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NCP1252ADR2G Integrated Circuit Chip Current Mode PWM Controller

Model Number NCP1252ADR2G
Certification new & original
Place of Origin original factory
Minimum Order Quantity 10pcs
Price Negotiate
Payment Terms T/T, Western Union, Paypal
Supply Ability 9200pcs
Delivery Time 1 day
Packaging Details Please contact me for details
Description Converter Offline Flyback, Forward Topology Up to 500kHz 8-SOIC
Power Supply voltage, Vcc pin, continuous voltage 28 V
Maximum current injected into pin 7 20 mA
Maximum voltage on low power pins (except pin 6, 7) −0.3 to 10 V
Thermal Resistance Junction−to−Air – SO8 180 °C/W
Maximum Junction Temperature 150 °C
Storage Temperature −60 to +150 °C
Detailed Product Description

 

NCP1252

Current Mode PWM Controller for Forward and Flyback Applications

 

The NCP1252 controller offers everything needed to build cost− effective and reliable ac−dc switching supplies dedicated to ATX power supplies. Thanks to the use of an internally fixed timer, NCP1252 detects an output overload without relying on the auxiliary Vcc. A Brown−Out input offers protection against low input voltages and improves the converter safety. Finally a SOIC8 package saves PCB space and represents a solution of choice in cost sensitive project.

 

Features

• Peak Current Mode Control

• Adjustable Switching Frequency up to 500 kHz

• Jittering Frequency ±5% of the Switching Frequency

• Latched Primary Over Current Protection with 10 ms Fixed Delay

• Delayed Operation Upon Start−up via an Internal Fixed Timer

• Adjustable Soft−start Timer

 

• Auto−recovery Brown−Out Detection

• UC384X−like UVLO Thresholds

• Vcc Range from 9 V to 28 V with Auto−recovery UVLO

• Internal 160 ns Leading Edge Blanking

• Adjustable Internal Ramp Compensation

• +500 mA / –800 mA Source / Sink Capability

 

• Maximum 50% Duty Cycle: A Version

• Maximum 80% Duty Cycle: B Version

• Ready for Updated No Load Regulation Specifications

• SOIC−8 Package

• This is a Pb−Free Device

 

Typical Applications

• Power Supplies for PC Silver Boxes, Games Adapter...

• Flyback and Forward Converter

 

              

 

MAXIMUM RATINGS TABLE (Notes 1 and 2)

SymbolRatingValueUnit
VCCPower Supply voltage, Vcc pin, transient voltage: 10 ms with IVcc < 20 mA30V
VCCPower Supply voltage, Vcc pin, continuous voltage28V
IVccMaximum current injected into pin 720mA
 Maximum voltage on low power pins (except pin 6, 7)−0.3 to 10V
RθJ−A – SOThermal Resistance Junction−to−Air – SO8180°C/W
TJMAXMaximum Junction Temperature150°C
 Storage Temperature Range−60 to +150°C
 ESD Capability, HBM model1.8kV
 ESD Capability, Machine Model200V

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.

1. This device series contains ESD protection and exceeds the following tests: Human Body Model 1800 V per JEDEC Standard JESD22−A114E. Machine Model Method 200 V per JEDEC Standard JESD22−A115A.

2. This device contains latch−up protection and exceeds 100 mA per JEDEC Standard JESD78.

 

 

 

 

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