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PDF GR8818A Data sheet ( Hoja de datos )
| Número de pieza | GR8818A | |
| Descripción | Primary Feedback PWM Controller | |
| Fabricantes | grenergy | |
| Logotipo |  |
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Preliminary GR8818A
Primary Feedback PWM Controller for Flyback Application
Features
Primary Feedback Control without Secondary
Feedback Signal
Constant-Voltage(CV) and
Constant-Current(CC) Regulation
Pulse by Pulse Current Limiting
Low Start-Up Current (6uA)
Fixed 40KHz Switching Frequency for Driving
BJT
Built-In Soft Start
Wide VCC Operation Range
VCC Over-Voltage Protection
Output Over-Voltage Protection
Cable Compensation for CV Regulation
SOT-26 Package, with Few External
Components Needed
Description
The GR8818A is an excellent primary side feedback
controller. It’s integrated constant voltage (CV) and
constant current (CC) regulation functions. While it
operates on CV mode, it’s built-in the cable
compensation to compensate the voltage drop of
the DC output cable to improve the load regulation.
It minimizes the components counts and is available
in a tiny SOT-26 package. Those make it an ideal
design for low cost applications.
It provides functions of low startup current, green-
mode power-saving operation,. Also, the GR8818A
is built-in the VCC over-voltage protection and FB
pin to prevent the circuit being damaged from the
abnormal conditions.
Application
Low Power Adapter
Cell Phone Charger
Replacement for Linear Adapter
Ordering and Marking Information
GR8818A
Package Code
C: SOT-26
RoHS Code
G: Green (Halogen Free) Device
L: PB Free Device
Code 1
18A X X
XXX
Code 2
Serial No.
Code 1 8
Year 2008
Code 2 1
Month Jan.
9
2009
2
Feb.
A
2010
3
Mar.
B
2011
4
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.
2012.08 Ver. D Copyright grenergy OPTO, Inc. www.grenergy-ic.com
1
1 page  
Application Information
The GR8818A is a primary feedback PWM
controller for flyback converter application. It is
suitable for low output wattage below 5W and
small size AC/DC converter. It is required only
Preliminary GR8818A
very few external components to achieve
application. The typical application circuit is shown
in below Fig.1.
EMI
AC
Input
Filter
D1
N:1
D2
Ra VCC
OUT
FB
COMP
Rc GND
Rb Cb
Cc
CS
Rs
Cs
Fig.1.
Vout
2012. 08 Ver. D Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet GR8818A.PDF ] | |
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