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PDF GR8837 Data sheet ( Hoja de datos )
| Número de pieza | GR8837 | |
| Descripción | Green-Mode PWM Controller | |
| Fabricantes | Grenergy | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de GR8837 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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GR8837
Green-Mode PWM Controller with Latch Protection
Features
Current mode control
Standby power below 100mW
Under-voltage lockout (UVLO)
Non-audible-noise green-mode control
65KHz switching frequency
Internal leading-edge blanking
Internal slope compensation
Internal soft start
Gate output voltage clamp
Jitter and soft driving for reducing EMI
External OVP Latch off mode
External OTP Latch off mode
Over-load protection (OLP)-Auto recovery
mode
Vcc OVP protection- latch Mode
300mA driving capability
Application
Switching AC/DC Adapter
Battery Charger
Open frame SMPS
Ordering and Marking Information
Description
The GR8837 is a highly-integrated, low startup
current, current mode PWM controller with
green-mode function. The integrated functions also
include the leading-edge blanking of the current
sensing, internal slope compensation, soft start
OLP, and OCP. Besides, The RTL pin latch function
by injecting a high over 3.5V to provide OVP latch
off and low below 1V to provide OTP latch off
protection. These functions enable the power supply
to easily meet even the strictest power
requirements.
The GR8837 improves the performance and
reduces the cost of power supplies. It is with 8-pin
DIP and 6-pin SOT-26 package
DIP-8
SOT-26
Code 1 8 9 A B
GH
IJ
Year 2008 2009 2010 2011
2016
●●●
Code 2 1 2 3 4
9
2017
A
2018 2019
BC
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.
2011.06 Ver.1.0.Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1
1 page  
OLP SECTION
OLP trip level, Vcomp (OLP)
OLP delay time
PWM SECTION
Maximum duty cycle
RTL SECTION
Over Voltage Protection threshold voltage
OVP Debounce time
Over Temperature Protection threshold voltage
OTP Debounce time
Output current from RTL pin
RTL Pin voltage when floating
GR8837
- 3.5 V
- 60 mS
- 70 75
80 %
3 3.2 3.5 3.8 V
3 100 uS
3 0.95 1 1.05 V
3 100 us
3 75 80 85 uA
3 1.8 2.4 3.0 V
2011.06 Ver.1.0.Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
5
5 Page 
Typical Application Circuit
GR8837
1 GND
VCC
5
2011.06 Ver.1.0.Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet GR8837.PDF ] | |
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