파트넘버.co.kr GR8875L 데이터시트 PDF


GR8875L 반도체 회로 부품 판매점

Green-Mode PWM Controller



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GR8875L 데이터시트, 핀배열, 회로
Preliminary GR8875 Series
Green-Mode PWM Controller with High Voltage Startup Circuit
Features
High-Voltage (700V) Startup Circuit
Very Low Startup Current (<30uA)
Under-Voltage Lockout (UVLO)
HV Discharge Technology to Remove X-cap
Discharge Resistors for Good Power Saving
50mW Standby Power
Non-Audible-Noise Green-Mode Control
65KHz Switching Frequency with Jittering for
Reducing EMI
Cycle-by-Cycle Peak Current Limiting
Internal Leading-Edge Blanking
Internal Slope Compensation
Gate Output Maximum Voltage Clamp
Internal 6mS Soft Start
Soft Driving for Reducing EMI
AC Input Brownout Protection with Hysteresis
Programmable Over Temperature Latch (OTP)
Function
Over-Voltage Protection (OVP) on VCC pin
Over-Load Protection (OLP)
Flexible Latch Shutdown Combination: OVP;
OVP+OTP
500mA Driving Capability
SOP-8 /SOP-7/DIP-8 Green Package
Ordering and Marking Information
Applications
Adaptor/ Open Frame Power Supply
LCD Monitor/TV Power Supply
Description
The GR8875 series is a highly-integrated, low
startup current, current mode PWM controller with
green-mode function, high-voltage start up circuit,
and provides several protections such as OLP, OVP,
and OCP for fault conditions. A high-voltage current
source supplies the start up current and the
traditional start up resistance can be saved in order
to reduce the start up power loss. The controller
also includes the leading-edge blanking of the
current sensing, internal slope compensation and
cycle-by-cycle peak current limiting. It is also
integrated soft driving for reducing EMI, gate output
voltage clamp function for protecting power
MOSFET.
SOP-7 /SOP-8 / DIP-8
Code 1 8 9 A B
GH IJ
Year 2008 2009 2010 2011
2016 2017 2018 2019
Code 2 1 2 3 4 ● ● ● 9 A B C
Month Jan. Feb. Mar. Apr.
Sep. Oct. Nov. Dec.
Grenergy OPTO Inc. reserves the right to make changes to improve reliability or manufacture ability without notice, and advise customers
to obtain the latest version of relevant information to verify before placing orders.
2011.12 Ver. F Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1


GR8875L 데이터시트, 핀배열, 회로
Pin Description
Preliminary GR8875 Series
Pin Symbol
Description
Latch trigger pin, which a high over 3.5V for OVP latch off and a low below 1.05V
1 RTL
for OTP latch
2 COMP Voltage feedback pin, by connecting a photo-coupler to control the duty cycle.
3 CS Current sense pin, connect to sense the MOSFET current
4 GND Ground
5 OUT The output driver for driving the external MOSFET
6 VCC Power supply pin
7 NC Unconnected pin
This pin provides the startup current. When UVLO (on) is tripped, this HV loop will
8 HV
be off and limit the power loss on the startup circuit.
Family Code GR8875
Frequency 65KHz
OLP/SCP Auto-Recovery
VCC OVP Latch
Latch Pin Latch
GR8875L
GR8875R
65KHz
65KHz
Latch
Auto-Recovery
Latch
Auto-Recovery
Latch
Latch
GR8875H
100KHz
Auto-Recovery
Auto-Recovery
Latch
2011.12 Ver. F Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
2




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GR8875L controller

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