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Richtek - Primary Feedback CC/CV PWM Controller

Numéro de référence R7711A
Description Primary Feedback CC/CV PWM Controller
Fabricant Richtek 
Logo Richtek 





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R7711A fiche technique
®
R7711A
Primary Feedback CC/CV PWM Controller for Flyback
Converters
General Description
Features
The R7711A is a current mode PWM controller which
includes primary side voltage feedback technology. It
controls the output voltage and current accurately without
shunt regulator and opto-coupler on secondary side to
reduce the part count and save costs.
The R7711A is designed especially for low power
applications, such as chargers for cell phones, PDAs,
and other mobile products. Complete protections are
provided, such as output Under- Voltage Protection, output
Over-Voltage Protection, VDD Over-Voltage Protection,
Over-Temperature Protection, and Secondary Rectifier
Short-circuit Protection. The ultra low start-up current and
operating current of the R7711A achieves low power
consumption in standby mode. The R7711A supports burst
switching green mode operation to meet CEC regulations
and Energy-Star requirements.
Programmable Primary-Side CC/CV Regulation
Low No Load Input Power (<30mW at 230VAC)
Burst Switching Green Mode PWM Operation
Low Start-up Current (<10mA)
Easy EMI Solution
Built-in Jittering Frequency
Built-in Soft Gate Driver
Programmable Cable Drop Compensation
Adjustable Propagation Delay Compensation
VDD Over-Voltage Protection (VDDOVP)
Output Over-Voltage Protection (OVP)
Output Under-Voltage Protection (UVP)
Secondary Rectifier Short-Circuit Protection (SRSP)
Internal Over-Temperature Protection (OTP)
RoHS Compliant and Halogen Free
Applications
Switching AC/DC Adaptor and Battery Charger
DVD Open Frame Power Supply
STB Power
Cell Phone Charger
Networking Power Supply
Simplified Application Circuit
L
AC Mains
(90V to 265V)
N
VDD DMAG
R7711A
COMP GATE
CS
GND
2
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
R7711A-06 May 2014
VOUT
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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