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RT7791GE PDF预览

RT7791GE

更新时间： 2024-01-04 17:16:54
品牌 Logo 应用领域
立锜 - RICHTEK /
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1页 118K
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RT7791GE 技术参数

Status：ActiveFeedback Regulation Mode：SSR
Switching Frequency_Normal (kHz)：85Switching Frequency_Peak (kHz)：
Peak load Application：YesHV Start-up：No
CCM/Valley Multi-mode：YesProgrammable Burst/Green-mode：No
Brown-in/out：Yes (Buck cap.Side)OVP：Adaptive OVP
External OTP：YesUVLO ON (V)：14.5
UVLO OFF (V)：7VDD OVP (V)：44
Features：OCP;OVP;UVPPackage Type：SOP-8

RT7791GE 数据手册

  
RT7791  
PWM Controller for Programmable Power Converter (USBPD)  
General Description  
Features  
Optimized for Adaptive Output Power  
Integrated Low-Dropout Regulator (LDO)  
Wide VDD Range : 10V to 40V  
Adaptive Output Over-Voltage Protection  
Adaptive Over-Current Protection  
Adaptive Loop Gain Control for Loop Stability  
High Efficiency  
The RT7791 series is specifically designed to work with  
controllers, such as the RT7202, to provide a total  
solution for USB PD or a programmable power adapter.  
The RT7791 can achieve high efficiency, meet safety  
standards, and consume less than 50mW of power in a  
5V standby condition.  
The RT7791 includes several innovations in order to  
provide a solution with a wide range of output voltage.  
By way of DMAG pin, the RT7791 senses output  
voltage to adjust loop gain for system stability, to adjust  
output over-voltage protection threshold voltage to  
protect external devices, and to adjust current limit to  
meet Limited Power Source (LPS) safety requirements.  
Green Mode Operation at Light Load or No  
Load  
Comprehensive Protection Features  
Bulk-Capacitor Brown-In and Brown-Out  
Protection  
OTP Pin for External Over-Temperature  
Protection  
The RT7791 is also equipped with comprehensive  
protection features, including Bulk-Capacitor brown-in  
/brown-out protection, VDD over-voltage protection  
VDD Over-Voltage Protection  
Output Over-Voltage and Under-Voltage  
Protection  
(VDD OVP),  
output  
over-voltage/under-voltage  
protection (Output OVP/UVP), secondary rectifier  
short-circuit protection (SRSP), and external  
over-temperature protection (External OTP). For  
constant output power regulation, a resistor connected  
to CS pin can be used to achieve accurate line  
compensation across the universal input voltage range.  
The RT7791 also provides various features to protect  
against any failures occurring at the secondary-side  
component, such as the RT7202 or a shunt regulator.  
Secondary Rectifier Short-Circuit Protection  
Programmable Line Compensation  
Others  
< 50mW in 5V Standby Mode for Power Saving  
Driver Capability : 300mA/300mA  
SmartJitterTM Technology  
Applications  
USB PD and Programmable Power Adapters  
The RT7791 and the RT7202 work together to realize a  
robust and safe design to prevent all the potential fault  
scenarios, which may arise from versatile and unknown  
connections to various devices, cables, plugs and  
receptacles.  
Simplified Application Circuit  
Option  
VBUS  
L
1
2
GND  
N
RT7202A  
VDD  
OPTO  
GND  
CS-  
VFB  
USBP  
CC1  
RT7791  
DMAG  
OTP  
CS  
VIN  
V2  
CC1  
Option  
COMP  
GND  
VDD  
4
3
(Optional)  
GATE  
Copyright © 2018 Richtek Technology Corporation. All rights reserved.  
is a registered trademark of Richtek Technology Corporation.  
DS7791-03 July 2018  
www.richtek.com  
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