欢迎访问ic37.com |
会员登录 免费注册
发布采购

RT7739A 参数 Datasheet PDF下载

RT7739A图片预览
型号: RT7739A
PDF下载: 下载PDF文件 查看货源
内容描述: [暂无描述]
分类和应用:
文件页数/大小: 1 页 / 81 K
品牌: RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
   
®
RT7739
SmartJitter
TM
Multi-Mode Flyback Controller
General Description
The RT7739 series is an enhanced high-efficiency multi-
mode PWM flyback controller, incorporating Richtek’s
proprietary SmartJitter
TM
technology. The innovative
SmartJitter
TM
technology can reduce EMI emissions of a
switch-mode power supply in green mode as well as
eliminate output ripple due to frequency jittering. Also,
the RT7739 series features a multi-mode control scheme,
operating from continuous-conduction mode (CCM) to
discontinuous-conduction mode (DCM) with valley
switching, to achieve high efficiency and optimal
performance.
The RT7739 is a current-mode PWM controller for flyback
converters. It integrates comprehensive and programmable
protection features, which include propagation delay
compensation, output over-voltage protection (OVP),
external over-temperature protection (OTP), and bulk-
capacitor brown-in/brown-out protection. With the above
features, the RT7739 enables a cost-effective and compact
design for a wide range of AC-DC conversion applications.
It is available in a SOT-23-6 package.
Features
Proprietary SmartJitter
TM
Technology
�½
Reducing EMI Emissions of SMPS
�½
Eliminating
Frequency-Jittering-Induced Output
Ripple
Operating in Continuous-Conduction Mode (CCM),
Discontinuous-Conduction Mode (DCM), DCM with
Valley-Switching
Ultra-low Start-Up Current (<3μA)
μ
Accurate Over-Current Protection (OCP)
Programmable Line Compensation
Programmable Output Over-Voltage Protection
Programmable External Over-Temperature Protection
Programmable Bulk-Capacitor Brown-In/Brown-Out
Protection
Driver Capability : 200mA/−300mA
High Noise Immunity
Applications
Switching AC-DC Adapter
NB Adapter
TV/Monitor Standby Power
PC Peripherals
Simplified Application Circuit
V
O+
Mains
(90V to 265V)
V
O-
(Option)
DMAG
COMP
C
COMP
VDD
RT7739
GATE
CS
GND
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7739-05
November 2018
www.richtek.com
1