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NCP1566: Highly Integrated Dual-Mode Active Clamp PWM Controller

Datasheet: Highly Integrated Dual-Mode Active Clamp PWM Controller
Rev. 4 (3231kB)
Product Overview
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The NCP1566 is a highly integrated dual-mode active-clamp PWM controller targeting next-generation high-density, high-performance and small to medium power level isolated dc-dc converters for use in telecom and datacom industries. It can be configured in either voltage mode control with input voltage feed-forward or peak current mode control. Peak current mode control may be implemented with input voltage feedforward as well. Adjustable adaptive overlap time optimizes system efficiency based on input voltage and load conditions. This controller integrates all the necessary control and protection functions to implement an isolated active clamp forward or asymmetric half-bridge converter. It integrates a high-voltage startup bias regulator. The NCP1566 has a line undervoltage detector, cycle-by-cycle current limiting, line voltage dependent maximum duty ratio limit, over voltage protection, and programmable overtemperature protection using an external thermistor. It also includes a dual-function pin used for communicating the presence of a fault but also for shutting down the controller. A dedicated dual-function synchronization pin eases operations when associating bricks together.
Features   Benefits
     
  • Both Voltage Mode Control and Current Mode Control
 
  • Flexible topology solution
  • Line feedforward
 
  • Stable constant crossover across input voltage range
  • Adaptive Overlap time Control
 
  • Extended ZVS across input & output operating conditions
  • Integrated 120 V HV Startup
 
  • Lossless startup and reduced Vcc capacitor via dynamic startup
  • Programmable Line Undervoltage Lockout (UVLO) with Adjustable Hysteresis
 
  • Safely limits operating input voltage range
  • Cycle by Cycle Peak Current Limiting
 
  • Increased converter robustness
  • Adjustable Over Power Protection & Overcurrent Protection Based on Average Current
 
  • Precise output power limit
  • Programmable Duty Ratio Clamp
 
  • Efficiently prevents transformer saturation
  • Programmable Soft-Start
 
  • Lowers components stress at startup
  • Programmable Shutdown and Restart Delays
 
  • Robustness and flexibility of design
  • Programmable External Overtemperature Protection Using Thermistor
 
  • Robustness and flexibility of design
  • FLT/SD pin Used for Fault reporting and Shutdown Input
 
  • Easy system integration
  • Programmable Oscillator with a 1-MHz Maximum Frequency and Synchronization Capability.
 
  • Ready for high frequency designs & Paralleling
  • Over Voltage Protection through a dedicated pin
 
  • Robustness and flexibility of design
  • Main Switch Drive Capability of -2 A/3 A
 
  • Drive larger MOSFETs more efficiently
  • Active Clamp Switch Drive Capability of -2 A/1 A
   
  • Vcc Range: from 6.5 V to 20 V
   
  • 5 V/2% Voltage Reference
   
Applications   End Products
  • High Efficiency Isolated dc−dc Converters
  • 24 V and 48 V Telecom systems
  • Server Power Supplies
  • 48 V Automotive Applications
 
  • Telecom Converters
  • High power Servers
  • Audio PA converters
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCP1566POE12V6AGEVB Active
NCP1566 12-V/6-A Evaluation Board for PoE
NCP1566TEL5V10AGEVB Active
NCP1566 5-V/10-A Evaluation Board for Telecom
NCP1566TELECGEVB Active
NCP1566 3.3-V/30-A Evaluation Board for Telecom
Availability & Samples
Specifications
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP1566MNTXG Active
Pb-free
Halide free
NCP1566, Highly Integrated Dual-Mode Active Clamp PWM Controller QFN-24 485CW 1 260 Tape and Reel 4000 $1.3333
Market Leadtime (weeks) : Contact Factory

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Phases
Control Mode
VCC Min (V)
VCC Max (V)
fSW Typ (kHz)
Package Type
NCP1566MNTXG  
 $1.3333 
Pb
H
 Active   
Forward
1
Current/Voltage Mode
6.5
120
Programmable up to 1 MHz
QFN-24
Case Outlines
485CW   
Previously Viewed Products
Clear List

Featured Video
Synching and Short Circuiting an Active Clamp Forward Converter | NCP1566 PWM Controller
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