RT7786GC datasheet, PDF - EEWORLD Datasheet

RT7786GC: DescriptionPWM Controller for Programmable Power Converter (USBPD), Active, SSR, 85kHz, No, Yes(w/i X-CAP discharge), Yes, No; File Size116KB，1 Pages; ManufacturerRichtek Technology Corporation; Websitehttps://www.richtek.com/

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RT7786GC Overview

PWM Controller for Programmable Power Converter (USBPD), Active, SSR, 85kHz, No, Yes(w/i X-CAP discharge), Yes, No

RT7786GC Parametric

Parameter Name	Attribute value
Status	Active
Feedback Regulation Mode	SSR
Switching Frequency_Normal(kHz)	85
Switching Frequency_Peak(kHz)
Peak load Application	No
HV Start-up	Yes(w/i X-CAP discharge)
CCM/Valley Multi-mode	Yes
Programmable Burst/Green-mode	No
Brown-in/out
OVP	Adaptive OVP
External OTP	Yes
UVLO ON(V)	18
UVLO OFF(V)	7
VDD OVP(V)	34.5
Features	Adjustable Current Limit;Cycle-by-Cycle Current Limit;OCP;OVP;UVP
Package Type	SOP-8
Datasheet	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7786-04QV.pdf

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RT7786

PWM Controller for Programmable Power Converter (USBPD)

General Description

The RT7786 series is specifically designed to work with

controllers, such as RT7207, so as to provide a total

solution for the USB PD or the programmable power

adapter. The RT7786 is able to achieve the high

efficiency performance, meet safety standards, and

consume low standby power, which is normally less

than 30mW in a 5V standby condition.

The RT7786 offers several innovative features so as to

provide a solution having an output voltage of

wide-range. By using the DMAG pin, the RT7786

senses output voltages to adjust the loop gain for

system stability, to adjust the threshold voltage of

output over-voltage for external device protection, and

to adjust the current limit to meet Limited Power Source

(LPS) safety requirements.

The RT7786 is also equipped with comprehensive

protection features, including brown-in/brown-out

protection, VDD over-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 applications with constant output

power regulation, a resistor connected to CS pin can be

used to achieve the accurate line compensation across

the universal input voltage range. The RT7786 also

provides various features to protect against failures

occurring at the secondary-side component, such as

the RT7207 or a shunt regulator.

The RT7786 and the RT7207 can be used together to

realize a robust and safe design preventing all potential

fault scenarios, due to versatile and unknown

connections of various devices, cables, plugs and

receptacles.

Features



Optimized for Adaptive Output Power



Wide VDD Range : 10V to 32V



Adaptive Output Over-Voltage Protection

(Except RT7786xA and RT7786LCA)

Adaptive Over-Current Protection



Adaptive Loop Gain Control for Loop-Stability

High Efficiency



Green Mode Operation at Light Load or No

Load

Comprehensive Protection Features





Brown-In and Brown-Out Protection

VDD Over-Voltage Protection

Output Over-Voltage and Under-Voltage

Protection



External Over-Temperature Protection



Secondary Rectifier Short-Circuit Protection



Programmable Line Compensation

Others



< 30mW in 5V Standby Mode for Power Saving



Driver Capability : 300mA/300mA



SmartJitter

Technology

Applications



USB PD and Programmable Power Adapters

Simplified Application Circuit

OUT

AC Mains

GND

Option

CC1

VDD

CS-

AGND

GND

BLD USBP

CC1

RT7207C

DMAG VDD

RT7786

COMP

GND

GATE

Option

OPTO

IFB

VFB V5

VCP

V9 CC_GND CC2

CC2

is a registered trademark of Richtek Technology Corporation.

DS7786-04

March 2020

www.richtek.com

RT7786GC Related Products

	RT7786GC	RT7786LE	RT7786LC	RT7786LEP	RT7786GE	RT7786GCD	RT7786GA	RT7786AE
Description	PWM Controller for Programmable Power Converter (USBPD), Active, SSR, 85kHz, No, Yes(w/i X-CAP discharge), Yes, No	PWM Controller for Programmable Power Converter (USBPD), Active, SSR, 85kHz, No, Yes(w/i X-CAP discharge), Yes, No	PWM Controller for Programmable Power Converter (USBPD), Active, SSR, 85kHz, No, Yes(w/i X-CAP discharge), Yes, No	PWM Controller for Programmable Power Converter (USBPD), Preview, SSR, 85kHz, No, Yes(w/i X-CAP discharge), Yes, No	PWM Controller for Programmable Power Converter (USBPD), Active, SSR, 85kHz, No, Yes(w/i X-CAP discharge), Yes, No	PWM Controller for Programmable Power Converter (USBPD), Active, SSR, 85kHz, No, Yes(w/i X-CAP discharge), Yes, No	PWM Controller for Programmable Power Converter (USBPD), Active, SSR, 85kHz, No, Yes(w/i X-CAP discharge), No, No	PWM Controller for Programmable Power Converter (USBPD), Active, SSR, 85kHz, No, Yes(w/i X-CAP discharge), Yes, No
Status	Active	Active	Active	Preview	Active	Active	Active	Active
Feedback Regulation Mode	SSR	SSR	SSR	SSR	SSR	SSR	SSR	SSR
Switching Frequency_Normal(kHz)	85	85	85	85	85	85	85	85
Peak load Application	No	No	No	No	No	No	No	No
HV Start-up	Yes(w/i X-CAP discharge)	Yes(w/i X-CAP discharge)	Yes(w/i X-CAP discharge)	Yes(w/i X-CAP discharge)	Yes(w/i X-CAP discharge)	Yes(w/i X-CAP discharge)	Yes(w/i X-CAP discharge)	Yes(w/i X-CAP discharge)
CCM/Valley Multi-mode	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
Programmable Burst/Green-mode	No	No	No	No	No	No	No	No
OVP	Adaptive OVP	Adaptive OVP	Adaptive OVP	Adaptive OVP	Adaptive OVP	Adaptive OVP	Adaptive OVP	Adaptive OVP
External OTP	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
UVLO ON(V)	18	18	18	18	18	18	18	18
UVLO OFF(V)	7	7	7	7	7	7	7	7
VDD OVP(V)	34.5	34.5	34.5	34.5	34.5	34.5	34.5	34.5
Features	Adjustable Current Limit;Cycle-by-Cycle Current Limit;OCP;OVP;UVP	Adjustable Current Limit;Cycle-by-Cycle Current Limit;OCP;OVP;UVP	Adjustable Current Limit;Cycle-by-Cycle Current Limit;OCP;OVP;UVP	Adjustable Current Limit;Cycle-by-Cycle Current Limit;OCP;OVP;UVP	Adjustable Current Limit;Cycle-by-Cycle Current Limit;OCP;OVP;UVP	Adjustable Current Limit;Cycle-by-Cycle Current Limit;OCP;OVP;UVP	Adjustable Current Limit;Cycle-by-Cycle Current Limit;OCP;OVP;UVP	Adjustable Current Limit;Cycle-by-Cycle Current Limit;OCP;OVP;UVP
Package Type	SOP-8	SOP-8	SOP-8	SOP-8	SOP-8	SOP-8	SOP-8	SOP-8
Datasheet	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7786-04QV.pdf	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7786-04QV.pdf	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7786-04QV.pdf	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7786-04QV.pdf	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7786-04QV.pdf	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7786-04QV.pdf	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7786-04QV.pdf	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7786-04QV.pdf

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