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HT7A6003_16 Datasheet, PDF (1/10 Pages) Holtek Semiconductor Inc – EMI-Improved Green Mode PWM Controller with Integrated Protections | |||
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HT7A6003
EMI-Improved Green Mode PWM
Controller with Integrated Protections
Feature
⢠Frequency jitter for restraining EMI
⢠Integrated Soft-Start function
⢠Very low operating current and start-up current
(<20mA) for satisfying Energy-Star 5.0 "No-Load
Mode" (Stand-by) power standard
⢠±5% trimmed oscillator for precise frequency
⢠Programmable switching frequency
⢠Non-audible-noise Green Mode Control
⢠LEB (Leading-Edge Blanking) on CS pin
⢠Internal slope compensation
⢠Cycle-by-Cycle current limiting
⢠Short-Circuit-Protection(SCP) for Short-Circuit
and Over-Load condition
⢠Over-Voltage-Protection(OVP) on VCC Pin
⢠8-Pin SOP package
Applications
⢠Switching AC-DC adaptor
⢠Open frames switching power supply
⢠UPS
⢠LCD TV
General Description
HT7A6003 is an advanced, highly integration Off-
Line PWM Controller. This device provides many
protection functions with ultra low power circuit
design, and is optimized for restraining EMI. By
integrated a Non-Audible Noise Green Mode Control
Scheme and optimizing for the Energy Star 5.0 spec.,
the Power Supply Unit (PSU) implemented using
the HT7A6003 can satisfy the âEnergy Star No-
Load Modeâ Stand-by Power standard, which is
less than 0.3W within all Nameplate Output Power
Range of 0~250W. This device also integrated various
protection functions such as Short-Circuit Protection
(SCP, which can also be used for Over-Load
Protection, OLP), Cycle-by-Cycle Current Limiting,
Over Voltage Protection (OVP), and Soft-Start
function for reducing inrush current during system
initialization and preventing device burn-out.
The HT7A6003 also integrates Leading-Edge
Blanking and Slope Compensation for minimizing
external components cost and system complexity.
Application Circuits
EMI Filter
Flyback Converter
VOUT
GND
RT
GD
CS
VCC
HT7A6003 COMP
GND
VREF
0.1 F
FOD817
TL431
Rev. 1.30
1
March 25, 2016
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