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GR8875R Schematic ( PDF Datasheet ) - grenergy

Teilenummer GR8875R
Beschreibung Green-Mode PWM Controller
Hersteller grenergy
Logo grenergy Logo 




Gesamt 14 Seiten
GR8875R Datasheet, Funktion
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






GR8875R Datasheet, Funktion
Preliminary GR8875 Series
Rising Time, Load Capacitance = 1000pF
Falling Time, Load Capacitance = 1000pF
VGATE-Clamp (VCC = 25V )
PWM SECTION
Maximum Duty Cycle
Soft Start Time (Freq=65kHz)
*Latch PIN FUNCTION OPTION (See below Fig.1)
Over Voltage Protection Threshold Voltage
OVP Debounce, Fs = 65kHz
Over Temperature Protection Threshold Voltage
OTP Debounce, Fs = 65kHz
Output Current from RTL Pin
Clamped Voltage
VCC De-latch Voltage
Below equations are for reference only.
5 150 nS
5 50 nS
5 11 13 15 V
70 75 80 %
6 mS
3 3.2 3.5 3.8 V
3 100 uS
3 0.95 1.05 1.15 V
3 100 uS
3 92 100 108 uA
3 2.2 V
3.4 V
Equation 1:
Equation 2:
[0.9v × RHV +1K ]
Vac on(RMS) =
1K
2
[ 0.8v × RHV +1K ]
Vac off (RMS ) =
1K
2
2011.12 Ver. F Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
6

6 Page









GR8875R pdf, datenblatt
Package Information
DIP-8
Preliminary GR8875 Series
SYMBOL
MILLIMETERS
MIN.
MAX.
A 5.33
A1 0.38
A2 2.92 4.95
b 0.36 0.56
b2 1.14 1.78
c 0.20 0.35
D 9.01 10.16
D1 0.13
E 7.62 8.26
E1 6.10 7.11
e 2.54 BSC
eA 7.62 BSC
eB 10.92
L 2.92 3.81
Note: 1. Followed from JEDEC MS-001 BA.
DIP-8
MIN.
0.015
0.115
0.014
0.045
0.008
0.355
0.005
0.300
0.240
0.115
INCHES
0.100 BSC
0.300 BSC
MAX.
0.210
0.195
0.022
0.070
0.014
0.400
0.325
0.280
0.430
0.150
2. Dimension D, D1 and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not
exceed 10 mil.
2011.12 Ver. F Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
12

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