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PDF GL8258 Data sheet ( Hoja de datos )
| Número de pieza | GL8258 | |
| Descripción | Primary Feedback PWM Controller | |
| Fabricantes | grenergy | |
| Logotipo |  |
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Preliminary GL8258
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)
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
Application
Low power adapter
Cell phone charger
Replacement for linear adapter
Description
The GL8258 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 minimizes the components
counts and is available in a tiny SOT-26 package.
Those make it an ideal design for low cost
application.
It provides functions of low startup current, green-
mode power-saving operation,. Also, the GL8258 is
built-in the VCC over-voltage protection and FB pins
to prevent the circuit being damaged from the
abnormal conditions.
Ordering and Marking Information
SOT-26
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.
2011.08 Ver.A Copyright grenergy OPTO, Inc. www.grenergy-ic.com
1
1 page  
Preliminary GL8258
Electrical Characteristics (VCC = 15V, TA = 25°C, unless otherwise specified.)
Parameter
Symbol
Test Conditions
Min Typ Max Units
VCC SECTION
Continuously operating voltage
On threshold voltage
Off threshold voltage
Start-up current
Operating supply current
VOP
VTH-ON
VTH-OFF
Icc-ST
Icc-OP
VCC = 9V
25 V
9.8 10.8 11.8 V
6.3 6.8 7.3 V
2 6 10 uA
0.8 1.5 2.0 mA
OSCILLATOR SECTION
Normal PWM frequency
Green mode min frequency
Minimum frequency at no-load
Maximum duty cycle
Jitter range
FOSC
FOSC-N-MIN
DCYMAX
38.8 40 41.2 KHz
2.5k KHz
312 Hz
65 70 75 %
+/-3 %
ERROR AMPLIFIER
Output source current
Output sink current
Maximum output voltage
Minimum output voltage
Green mode start voltage
Burst mode start voltage
40 uA
40 uA
5V
0.5 V
1.7 V
0.7 V
CURRENT-SENSE SECTION
Input Impedance
Peak current limitation
Propagation delay
1 mΩ
1.0 1.1 1.2 V
150 nS
FB PIN
Feedback input voltage
Vfb variation versus vcc deviation
Input Bias current
FB OVP
IBVS
1.97 2 2.03 v
1%
-0.3 -2 uA
2.4 2.5 2.6 V
OUT SECTION
Output low level
Output high level
VCC = 15V, Io = 20mA
VCC = 15V, Io = 20mA
8
1V
V
Rising time
load capacitance = 1000pF
250 nS
2011.08 Ver.A Copyright grenergy OPTO, Inc. www.grenergy-ic.com
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet GL8258.PDF ] | |
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