PWM Controller. NCP1565 Datasheet

NCP1565 Controller. Datasheet pdf. Equivalent


Part NCP1565
Description Highly Integrated Dual-Mode Active Clamp PWM Controller
Feature NCP1565 Highly Integrated Dual-Mode Active Clamp PWM Controller The NCP1565 is a highly integrated.
Manufacture ON Semiconductor
Datasheet
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NCP1565 Highly Integrated Dual-Mode Active Clamp PWM Contro NCP1565 Datasheet
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NCP1565
NCP1565
Highly Integrated
Dual-Mode Active Clamp
PWM Controller
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 FLT/SD pin
used for communicating the presence of a fault but also for shutting
down the controller.
www.onsemi.com
QFN24
MN SUFFIX
CASE 485CW
MARKING
DIAGRAM
1
1565
ALYWG
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
General Features
Support Voltage Mode Control and Peak Current Mode Control
Line Feedforward
Adaptive Overlap time Control for Improved Efficiency
Integrated 120 V High Voltage Startup Circuit
Programmable Line Undervoltage Lockout (UVLO) with Adjustable
24 23 22 21 20 19
RAMP 1
SS 2
DLMT 3
18 REFA
17 FLT/SD
16 OUTA
Hysteresis
DT 4
15 PGND
Cycle by Cycle Peak Current Limiting
RT 5
14 OUTM
Overcurrent Protection Based on Average Current
Short Circuit Protection
Programmable Duty Ratio Clamp
AGND 6
13 VCC
7 8 9 10 11 12
Programmable Soft−Start
Programmable Shutdown and Restart Delays
Programmable External Overtemperature Protection Using
Thermistor
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 30 of this data sheet.
FLT/SD pin Used for Fault reporting and Shutdown Input
Programmable Oscillator with 1.5 MHz Maximum Frequency
5 V/2% Voltage Reference
Main Switch Drive Capability of −2 A/3 A
Active Clamp Switch Drive Capability of −2 A/1 A
VCC Range: from 6.5 V to 20 V
These Devices are Pb−Free, Halogen Free/BFR Free
Typical Applications
High Efficiency Isolated dc−dc Converters
Server Power Supplies
24 V and 48 V Telecom systems
42 V Automotive Applications
and RoHS Compliant
© Semiconductor Components Industries, LLC, 2016
January, 2016 − Rev. 4
1
Publication Order Number:
NCP1565/D



NCP1565
NCP1565
Figure 1. Typical Application Circuit in Voltage Mode Control
www.onsemi.com
2







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