NCP1252 Series

PWM Controller, Current Mode, for Forward and Flyback Applications

Catalog

PWM Controller, Current Mode, for Forward and Flyback Applications

Part	Package / Case	Package / Case [y]	Package / Case [x]	Fault Protection	Topology	Duty Cycle	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Voltage - Start Up	Control Features	Output Isolation	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Mounting Type	Package / Case	Package / Case	Utilized IC / Part	Current - Output	Board Type	Regulator Topology	Voltage - Output	Supplied Contents	Main Purpose	Outputs and Type	Outputs and Type
ON Semiconductor NCP1252EDR2G	8-SOIC	3.9 mm	0.154 in	Current Limiting	Flyback Forward	45.6 %	-25 °C	125 °C	8-SOIC	14 V	Frequency Control Soft Start	Isolated	28 V	9 V	Surface Mount
ON Semiconductor NCP1252ADR2G	8-SOIC	3.9 mm	0.154 in	Current Limiting	Flyback Forward	48 %	-25 °C	125 °C	8-SOIC	10 V	Frequency Control Soft Start	Isolated	28 V	9 V	Surface Mount
ON Semiconductor NCP1252APG	8-DIP			Current Limiting	Flyback Forward	48 %	-25 °C	125 °C	8-PDIP	10 V	Frequency Control Soft Start	Isolated	28 V	9 V	Through Hole	0.3 in	7.62 mm
ON Semiconductor NCP1252TSFWDGEVB																		NCP1252	10 A	Fully Populated	Forward Converter	12 V	Board(s)	AC/DC Primary Side	Isolated	1
ON Semiconductor NCP1252CDR2G	8-SOIC	3.9 mm	0.154 in	Current Limiting	Flyback Forward	65 %	-25 °C	125 °C	8-SOIC	10 V	Frequency Control Soft Start	Isolated	28 V	9 V	Surface Mount
ON Semiconductor NCP1252BDR2G	8-SOIC	3.9 mm	0.154 in	Current Limiting	Flyback Forward	80 %	-25 °C	125 °C	8-SOIC	10 V	Frequency Control Soft Start	Isolated	28 V	9 V	Surface Mount

Catalog

PWM Controller, Current Mode, for Forward and Flyback Applications

Key Features

• Peak current mode control

• Adjustable switching frequency

• Latched primary overcurrent protection with 10 ms fixed delay

• Adjustable soft start timer

• Auto recovery brown out detection

• Extended Vcc range up to 28 V with auto recovery UVLO

• Internal 160 ns leading edge blanking

• Frequency jittering

• Adjustable internal ramp compensation

• +500 mA / -800 mA Source/Sink current driver capability

• Skip cycle operation in light/no load operation

• SOIC-8 package

Description

The NCP1252 controller offers everything needed to build cost effective and reliable ac-dc switching supplies dedicated to ATX power supplies or any forward application. 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, the SOIC-8 package saves PCB space and represents a solution of choice in cost sensitive project.