NCP1560_06 Datasheet, PDF (1/20 Pages) ON Semiconductor – Full Featured Voltage Mode PWM Controller

NCP1560
Full Featured Voltage Mode
PWM Controller
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 startup 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
overlap 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/overvoltage lockout, fast line
feedforward, soft−start and a maximum duty cycle limit.
Features
• Minimum Operating Voltage of 21.5 V
• Internal High Voltage Startup Regulator
• Dual Control Outputs with Adjustable Overlap Delay
• Single Resistor Oscillator Frequency Setting
• Fast Line Feedforward
• Line Under/Overvoltage Lockout
• Dual Mode Overcurrent Protection
• Programmable Maximum Duty Cycle Control
• Maximum Duty Cycle Proportional to Line Voltage
• Programmable Soft−Start
• Precision 5.0 V Reference
• Pb−Free Package is Available*
Typical Applications
• Telecommunication Power Converters
• Industrial Power Converters
• High Voltage Power Modules
• +42 V Automotive Systems
• Control Driven Synchronous Rectifier Power Converters
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
TX
http://onsemi.com
MARKING DIAGRAM
16
16
1
SO−16
D SUFFIX
CASE 751B
NCP1560
AWLYWW
1
NCP1560 = Device Code
A
= Assembly Location
WL
= Wafer Lot
Y
= Year
WW
= Work Week
PIN CONNECTIONS
1
V_in
UV/OV
16
V_AUX
OUT1
NC
GND
FF
OUT2
CS
C_SKIP
t_D
V_REF
R_T
V_EA
DC_MAX
SS
ORDERING INFORMATION
Device
Package
Shipping^†
NCP1560HDR2 SO−16 2500/Tape & Reel
NCP1560HDR2G SO−16 2500/Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
L_out
+
V_in
−
Startup
Feedforward
SR
Drive
+
C_out
V_out
−
V_in FF
NCP1560
UV/OV
OUT1
OUT2
Overlap ^tD
Delay
Driver
M1
C_clamp
M_clamp
Opto
Figure 1. Active−Clamp Forward Converter
Error
Amplifier
© Semiconductor Components Industries, LLC, 2006
1
July, 2006 − Rev. 7
Publication Order Number
NCP1560/D