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RICHPOWER MICROELECTRONICS - Enhanced Quadruple Mode PWM Flyback Controller

Numéro de référence R7732
Description Enhanced Quadruple Mode PWM Flyback Controller
Fabricant RICHPOWER MICROELECTRONICS 
Logo RICHPOWER MICROELECTRONICS 





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R7732 fiche technique
Preliminary
R7732
Enhanced Quadruple Mode PWM Flyback Controller
General Description
R7732 series is the successor of R7730/1 and fully
compatible with most of SOT-23-6 product so far in the
market. It's an enhanced, high-performance and current
mode PWM controller. It focuses on "easy to design" in
different applications and it will save both design effort and
external components.
Besides the general features shown in the Features
section, R7732 covers wide protection options, such as
internal Over Load Protection(OLP) and Over Voltage
Protection(OVP) to eliminate the external protection
circuits. Moreover, it also features Secondary Rectifier
Short Protection(SRSP) and CS pin open protection. This
protection will make the PSU design for reliability and safety
easier.
R7732 is designed for power supply such as NB adaptor
which is a very cost effective and compact design. The
precise external OVP and Over Temperature Protection
(OTP) can be implemented by very simple circuit. The
start-up resistors can also be replaced by bleeding
resistors to save power loss and component count.
Features
UVLO 9V/14V
Soft Start Function
Current Mode Control
Built-in Slope Compensation
Internal Leading Edge Blanking
PWM Quadruple Mode for Green-Mode
Excellent Green Power Performance
Cycle-by-Cycle Current Limit
Internal Over Voltage Protection
Internal Over Load Protection
Secondary Rectifier Short Protection
Opto-Coupler Short Protection
Feedback Open-Loop Protection
CS Pin Open Protection
Built-in Jittering Frequency
Built-in PRO Pin for External Arbitrary OVP/OTP
Soft Driving for EMI Noise
High Noise Immunity
RoHS Compliant and Halogen Free
R7732 Version Table
Version
Frequency
OLP Delay Time
Internal OVP(27V)
OLP & SRSP
PRO Pin High
PRO Pin Low
R7732G
65kHz
56ms
Auto Recovery
Auto Recovery
Latch
Auto Recovery
R7732R
65kHz
56ms
Auto Recovery
Auto Recovery
Auto Recovery
Latch
R7732L
65kHz
56ms
Latch
Auto Recovery
Latch
Latch
R7732A
65kHz
28ms
Latch
Latch
Latch
Latch
R7732H
100kHz
36ms
Auto Recovery
Auto Recovery
Auto Recovery
Latch
Pin Configurations
(TOP VIEW)
GATE VDD CS
www.DataSheet4U.com
65 4
23
GND COMP PRO
SOT-23-6
R7732-04P Apr 2010
Application
Switching AC/DC Adaptor and Battery Charger
Printer Power Supply
DVD Open Frame Power Supply
Set-Top Box (STB)
ATX Standby Power
TV/Monitor Standby Power
PC Peripherals
NB Adaptor
1

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