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NCP1562: PWM Controller, High Performance, Active Clamp / Reset

Datasheet: PWM Controller, High Performance, Active Clamp / Reset
Rev. 5 (477.0kB)
Product Overview
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» Product Change Notification
The NCP1562x is a family of voltage mode controllers designed for dc-dc converters requiring high efficiency and low parts count. These controllers incorporate two in phase outputs with an overlap delay to prevent simultaneous conduction and facilitates soft switching. The main output is designed for driving a forward converter primary MOSFET. The secondary output is designed for driving an active clamp circuit MOSFET, a synchronous rectifier on the secondary side, or an asymmetric half bridge circuit. The NCP1562 family reduces component count and system size by incorporating high accuracy on critical specifications such as maximum duty cycle limit, undervoltage detector and overcurrent threshold. Two distinctive features of the NCP1562 are soft-stop and a cycle skip current limit with a time threshold. Softstop circuitry powers down the converter in a controlled manner if a severe fault is detected. The cycle skip detector enables a softstop sequence if a continuous overcurrent condition is present. Additional features found in the NCP1562 include line feedforward, frequency synchronization up to 1.0 MHz, cycle by cycle current limit with leading edge blanking (LEB), independent under and overvoltage detectors, adjustable output overlap delay, programmable maximum duty cycle, internal startup circuit and soft-start.
Features   Benefits
     
  • Soft-Stop Powers Down Converter in a Controlled Manner
 
  • Eliminates Resonance Between Active Clamp Capacitor and Primary Inductance
  • Independent Line Undervoltage and Overvoltage Detectors
 
  • Reduces External components
  • Programmable Maximum Volt-Second Product
 
  • Prevents Transformer Saturation
  • Programmable Soft-Start
 
  • Reduces Stress During Power Up
  • Internal 100 V Startup Circuit
 
  • Eliminates the Need for External Components
  • Dual Outputs with Adjustable Overlap Delay
   
  • >2 A Output Drive Capability
   
  • Cycle-by-Cycle Current Limit
   
  • Cycle Skip Initiated if Continuous Current Limit Condition Exists
   
  • Voltage Mode Operation with Input Voltage Feedforward
   
  • Fixed Frequency Operation up to 1 MHz
   
  • Bidirectional Frequency Synchronization
   
  • Accurate Programmable Maximum Duty Cycle
   
  • Precision 5 V Reference
   
Applications   End Products
  • High power isolated DC/DC converters
  • Power supplies
 
  • Desktop / Server PSU
  • Telecom base station PSU
  • Flat TV PSU
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCP1562-100WGEVB Active
Pb-free
100 W / 48 V Telecom Brick Evaluation Board
Availability & Samples
Specifications
Case Outlines
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP1562ADBR2G Active
Pb-free
Halide free
NCP1562 TSSOP-16 948F-01 1 260 Tape and Reel 2500 $1.1301
NCP1562ADR2G Active
Pb-free
Halide free
NCP1562 SOIC-16 751B-05 1 260 Tape and Reel 2500 $1.056
NCP1562BDBR2G Last Shipments
Pb-free
Halide free
NCP1562 TSSOP-16 948F-01 1 260 Tape and Reel 2500  
NCP1562BDR2G Active
Pb-free
Halide free
NCP1562 SOIC-16 751B-05 1 260 Tape and Reel 2500 $1.056
Market Leadtime (weeks) : 4 to 8
Avnet   (2020-08-19) : >1K
ON Semiconductor   (2020-09-02) : 60,000
PandS   (2020-09-14) : >1K
Market Leadtime (weeks) : 4 to 8
PandS   (2020-09-14) : >1K
Avnet   (2020-08-19) : >1K
ON Semiconductor   (2020-09-02) : 15,000
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2020-09-02) : 10,000
PandS   (2020-09-14) : >1K
Market Leadtime (weeks) : 8 to 12
PandS   (2020-09-14) : >1K

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Phases
Control Mode
VCC Min (V)
VCC Max (V)
fSW Typ (kHz)
Package Type
NCP1562ADBR2G  
 $1.1301 
Pb
H
 Active   
Forward
1
Voltage Mode
8V
100V
Up to 1MHz
TSSOP-16
NCP1562ADR2G  
 $1.056 
Pb
H
 Active   
Forward
1
Voltage Mode
8V
100V
Up to 1MHz
SOIC-16
NCP1562BDR2G  
 $1.056 
Pb
H
 Active   
Forward
1
Voltage Mode
8V
100V
Up to 1MHz
SOIC-16
Case Outlines
751B-05    948F-01   
Packages
NCP1562: PWM Controller, High Performance, Active Clamp / Reset
NCP1562: PWM Controller, High Performance, Active Clamp / Reset
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Featured Video
DC/DC Converter Solutions with the NCP1562-100GEVB Evaluation Board
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