RT7738
SmartJitterTM Multi-Mode Flyback Controller
General Description
Features
Proprietary SmartJitterTM Technology
Reducing EMI Emissions of SMPS
The RT7738 series are enhanced high efficient
multi-mode PWM flyback controller with proprietary
SmartJitterTM technology. The innovative SmartJitterTM
technology can not only reduces the EMI emissions of
SMPS when the system enters green mode, but also
eliminates the output jittering ripple. Also, the RT7738
series feature Continuous Conduction Mode (CCM)
and valley switching multi-mode control to optimize the
product performance. To meet the stringent trend
toward performance in recent years, the RT7738 series
are the best choice for product designers.
Output Jittering Ripple Elimination
Continuous Conduction Mode (CCM) and Valley
Switching Mode Control
Ultra-low Start-up current (<3A)
Accurate Over-Load Protection (OLP)
Programmable Propagation Delay Time
Compensation
Programmable Output Over-Voltage Protection
Programmable External Over-Temperature
Protection
Programmable Bulk Capacitor Brown-in/Brown-out
Protection
The RT7738 is available in SOT-23-6 package, and it is a
current mode PWM controller. Comprehensive protection
and programmable functions are built-in, including a
programmable propagation delay time compensation, a
programmable output Over-Voltage Protection (OVP), a
programmable external Over-Temperature Protection
(OTP), and a programmable bulk capacitor Brown-in/
Brown-out protection. With the above features, the
RT7738 is a cost-effective and compact solution for
AC-DC products.
Driver Capability : 200mA/300mA
High Noise Immunity
Applications
Switching AC-DC Adaptor
NB Adaptor
TV/Monitor Standby Power
PC Peripherals
Simplified Application Circuit
V
V
O+
Mains
(90V to 265V)
O-
(Optional)
(Optional)
(Optional)
VDD
DMAG
COMP
GATE
CS
(Optional)
RT7738
C
COMP
GND
Copyright © 2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7738-01 March 2017
www.richtek.com
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RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]