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GR8762 반도체 회로 부품 판매점

Power Factor Controller IC



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Grenergy
GR8762 데이터시트, 핀배열, 회로
GR8762
Power Factor Controller IC for High Power Factor
Features
Low Startup Current
Low Quiescent Current
Under-Voltage Lockout with Hysteresis
Zero Current Detector for Critical Conduction
Mode
Dynamic and Static Output Over-Voltage
Protection
Gate Output Maximum Voltage Clamped
Internal Restart Timer
1% Internal Reference Voltage
Internal Leading-Edge Blanking
+/-500mA Totem Pole Output with Active Shut
Down
Applications
Power Supply PFC Pre-Regulator
LED Lighting Application
Desktop PC
Electronics Ballast for Fluorescent Lamp
Description
The GR8762 is a current-mode PFC controller
operating in critical conduction mode. The
sinusoidal current is taken from the single phase line
supply and stabilized DC voltage is available at the
output. The IC includes a highly liner multiplier
which can reduce AC input current distortion, that
allows wide-range-mains operation with an
extremely low THD, even over a large load range.
The output voltage is controlled by an error amplifier
and an internal voltage reference. An effective
two-step (dynamic and static) OVP enables to safely
handle over voltages either occurring at start-up or
resulting from load disconnection. The totem-pole
output stage capable of ±500mA driving capability is
suitable for big MOSFET or IGBT. It is available in
both 8-pin DIP and 8-pin SOP package.
Ordering and Marking Information
DIP-8/SOP-8
Code 1 8 9 A B
Year 2008 2009 2010 2011 ● ● ●
Code 2 1 2 3 4
Month Jan. Feb. Mar. Apr.
G
2016
9
Sep.
H
2017
A
Oct.
I
2018
B
Nov.
J
2019
C
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.
2012.04 Ver.1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1


GR8762 데이터시트, 핀배열, 회로
Pin Configuration
TOP VIEW
GR8762
Pin Description
Pin Symbol
Description
Voltage error amplifier Inverting Input. VSEN is connected via a resistive divider to
1 VSEN the boost converter output, With a capacitor connected to COMP, The internal error
amplifier acts as an integrator.
Voltage error amplifier output. This is the first multiplier input. If the current flowing
2 COMP into this pin is exceeding an internal threshold, the multiplier output voltage is
reduced to prevent the MOSFET from over-voltage damage.
Multiplier input, which is the second multiplier input and is connected via a resistive
3 MUL
divider to the rectifier output voltage.
Current sense input, which is connected to a sense resistor controlling the
4 CS MOSFET source current .A leading edge blanking circuitry, suppresses voltage
spits when turning the MOSFET on.
Zero current detector input, which is connected to an auxiliary winding monitoring
5 ZCD
the zero crossing of the inductor current.
6 GND Ground
Gate drive output, which is the output of a totem-pole circuitry for direct driving a
7 DRV
MOSFET.
Positive voltage supply. If VCC exceeds the UVLO (on) threshold, the IC is
8 VCC switched on. When VCC falls below the UVLO (off) threshold, it is switched off and
power consumption is very low. VCC is internally clamped to 28V.
2012.04 Ver.1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
2




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GR8762 controller

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Power Factor Controller IC - Grenergy