NCP1560

Features:

•Minimum Operating Voltage of 21.5 V
•Internal High Voltage Start-up Regulator
•Dual Control Outputs with Adjustable Overlap Delay
•Single Resistor Oscillator Frequency Setting
•Fast Line Feedforward
•Line Under/Over Voltage Lockout
•Dual Mode Over Current Protection
•Programmable Maximum Duty Cycle Control
•Maximum Duty Cycle Proportional to Line Voltage
•Programmable Soft Start
•Precision 5.0 V Reference


Application

•Telecommunication Power Converters
•Industrial Power Converters
•High Voltage Power Modules
•+42 V Automotive Systems
•Control Driven Synchronous Rectifier Power Converters


Pinout




Specifications

Rating	Symbol	Value	Unit
Input Line Voltage	Vin	-0.3 to 150	V
Auxiliary Supply Voltage	VAUX	-0.3 to 16	V
Auxiliary Supply Input Current	IAUX	35	mA
OUT1 and OUT2 Voltage	VOUT	-0.3 to (VAUX+ 0.3 V)	V
OUT1 and OUT2 Output Current	IOUT	10	mA
5.0 V Reference Voltage	VREF	-0.3 to 6.0	V
5.0 V Reference Output Current	IREF	6.0	mA
All Other Inputs/Outputs Voltage	VIO	-0.3 to VREF	V
All Other Inputs/Outputs Current	IIO	10	mA
Operating Junction Temperature	TJ	-40 to 125	°C
Storage Temperature Range	Tstg	-55 to 150	°C
Power Dissipation at TA= 25°C	PD	0.77	W
Thermal Resistance, Junction to Ambient	RJA	130	°C/W

Description

The NCP1560 PWM controller contains all the features and flexibility needed to implement voltage-mode control in high performance single ended DC/DC converters. This device cost effectively reduces system part count with the inclusion of a high voltage start-up regulator that operates over a wide input range of 21.5 V to 150 V. The NCP1560 provides two control outputs, OUT1 which controls the main PWM switch and OUT2 with adjustable over-lap delay, which can control a synchronous rectifier switch or an active clamp/reset switch. Other distinctive features include: two mode over current protection, line under/over voltage lockout, fast line feedforward, soft start and a maximum duty cycle limit.