NCP1565: PWM Controller, Highly Integrated Dual-Mode Active Clamp

The NCP1565 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 feed forward 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 NCP1565 has a line undervoltage detector, cycle-by-cycle current limiting, line voltage dependent maximum duty ratio limit, and programmable overtemperature protection using an external thermistor. It also includes a dual-function FLTSD pin used for communicating the presence of a fault but also for shutting down the controller. For complete datasheet please contact your local ON Semiconductor Sales office or Tim.Kaske@onsemi.com

Features
  • Both Voltage Mode Control and Current Mode Control
  • Line feedforward
  • Adaptive Overlap time Control
  • Integrated 200V HV Startup
  • Programmable Line Undervoltage Lockout (UVLO) with Adjustable Hysteresis
  • Cycle by Cycle Peak Current Limiting
  • Overcurrent Protection Based on Average Current
  • Programmable Duty Ratio Clamp
  • Programmable Soft-Start
  • Programmable Shutdown and Restart Delays
  • Programmable External Overtemperature Protection Using Thermistor
  • FLT/SD pin Used for Fault reporting and Shutdown Input
  • Programmable Oscillator with 1.5 MHz Maximum Frequency
  • Main Switch Drive Capability of -2 A/3 A
  • Active Clamp Switch Drive Capability of -2 A/1 A
  • Short Circuit Protection
  • 5 V 2% Voltage Reference
  • VCC Range: from 6.5 V to 20 V
Benefits
  • Flexible topology solution
  • Stable constant crossover across input voltage range
  • Extended ZVS across input & output operating conditions
  • Lossless startup and reduced Vcc capacitor via dynamic startup
  • Safely limits operating input voltage range
  • Increased converter robustness
  • Precise output power limit
  • Efficiently prevents transformer saturation
  • Lowers components stress at startup
  • Robustness and flexibility of design
  • Robustness and flexibility of design
  • Good system integration
  • Ready for high frequency designs
  • Drive larger MOSFETs more efficiently
  • More efficient drive capability
Applications
  • High Efficiency Isolated dc−dc Converters
  • Server Power Supplies
  • 24 V and 48 V Telecom systems
  • 42 V Automotive Applications
End Products
  • Telecom systems
  • Servers
Application Notes (1)
Document TitleDocument ID/SizeRevisionRevision Date
A 3.3-V/20-A Active Clamp DC-DC Converter with NCP1565AND9173/D (1773kB)0Jul, 2014
Package Drawings (1)
Document TitleDocument ID/SizeRevision
QFN24, 4x4, 0.5P485CW (59.8kB)O
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Highly Integrated Dual-Mode Active Clamp PWM ControllerNCP1565/D (988kB)4
Evaluation Board Documents (4)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1565TELECGEVB Bill of Materials ROHS CompliantNCP1565TELECGEVB_BOM_ROHS (122kB)0
NCP1565TELECGEVB Gerber Layout Files (Zip Format)NCP1565TELECGEVB_GERBER (212kB)0
NCP1565TELECGEVB SchematicNCP1565TELECGEVB_SCHEMATIC (231kB)0
NCP1565TELECGEVB Test ProcedureNCP1565TELECGEVB_TEST_PROCEDURE (630kB)0
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCP1565TELECGEVBActiveHigh Efficiency Isolated dc−dc Converters, BRICK TELECOM Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1565MNTXGActivePb-free Halide freeQFN-24485CW1Tape and Reel4000$1.1
Specifications
ProductTopologyControl Modefsw Typ (kHz)Stand-by ModeUVLO (V)Short Circuit ProtectionLatchSoft StartVCC Max (V)Drive Cap. (mA)
NCP1565MNTXGForwardCurrent/Voltage ModeUp to 1500YesYesYesYesYes202000 / 3000
Highly Integrated Dual-Mode Active Clamp PWM Controller (988kB) NCP1565
A 3.3-V/20-A Active Clamp DC-DC Converter with NCP1565 NCP1565
NCP1565TELECGEVB BOM ROHS - 122 KB NCP1565TELECGEVB
NCP1565TELECGEVB GERBER - 212 KB NCP1565TELECGEVB
NCP1565TELECGEVB SCHEMATIC - 231 KB NCP1565TELECGEVB
NCP1565TELECGEVB TEST PROCEDURE - 630 KB NCP1565TELECGEVB
QFN24, 4x4, 0.5P NCP1565
NCP1565