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Grenergy |
Preliminary GR8837M
Green-Mode PWM Controller with Hiccup Protection
Features
Current mode control
Standby power below 100mW
Under-voltage lockout (UVLO)
Non-audible-noise green-mode control
100KHz 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 mode
External OTP latch mode
Over-load protection (OLP) -latch Mode
Vcc OVP protection-latch Mode
300mA driving capability
Description
The GR8837M 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 GR8837M improves the performance and
reduces the cost of power supplies. It is with 8-pin
DIP and 6-pin SOT-26 package
Application
Battery Charger
Open frame SMPS
Switching AC/DC Adapter
Ordering and Marking Information
.
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.
2011.04 Ver. A Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
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Pin Configuration
Preliminary GR8837M
GND
1
COMP
2
RTL 3
6 OUT
5 VCC
4 CS
Pin Description
Pin No. Name
Function
1 GND Ground pin
2 COMP Voltage feedback pin, by connecting a photo-coupler to control the duty cycle
Resistor trigger latch off which a high over 3.5V for OVP latch off and a low below
3 RTL
1V for OTP latch
4 CS Current sense pin, connect to sense the MOSFET current
5 VCC Power supply pin
6 OUT The output driver for driving the external MOSFET
Absolute Maximum Ratings
Supply voltage VCC --------------------------------------------------------------------------------------------------------- 30V
COMP, RTL, CS ---------------------------------------------------------------------------------------------------- -0.3 ~ 7V
OUT ----------------------------------------------------------------------------------------------------------- -0.3 ~ VCC + 0.3V
Junction temperature ------------------------------------------------------------------------------------------------------- 150℃
Operating ambient temperature ------------------------------------------------------------------------------ -20℃ ~ 85℃
Storage temperature range ---------------------------------------------------------------------------------- -65℃ ~ 150 ℃
SOT-26 package thermal resistance (junction to ambient) -------------------------------------------------- 250℃/W
Power dissipation (SOT-26, at ambient temperature = 85℃) ------------------------------------------------ 250mW
Power dissipation (DIP-8, at ambient temperature = 85℃) --------------------------------------------------- 650mW
Lead temperature (All Pb free packages, soldering, 10 sec) -------------------------------------------------- 260℃
ESD voltage protection, human body model -------------------------------------------------------------------------- 2KV
ESD voltage protection, machine model ------------------------------------------------------------------------------ 200V
2011.04 Ver. A Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
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