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GR8837A Schematic ( PDF Datasheet ) - Grenergy

Teilenummer GR8837A
Beschreibung Green-Mode PWM Controller
Hersteller Grenergy
Logo Grenergy Logo 




Gesamt 14 Seiten
GR8837A Datasheet, Funktion
Preliminary GR8837A
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)-Hiccup
300mA driving capability
Application
Switching AC/DC Adapter
Battery Charger
Open frame SMPS
Description
The GR8837A is a highly-integrated, low startup
current, current mode PWM controller with
green-mode function. This function enables the
power supply to easily meet even the strictest
power conservation requirements. The integrated
functions also include the leading-edge blanking
of the current sensing, internal slope com-
pensation, and soft start. OLP, OCP. The RTL pin
latch function by injecting a high over3.5V to
provide OVP latch off and low below 1V to provide
OTP latch off protection. To protect the external
power MOSFET from being damaged by supply
over voltage, the GR8837A OUT pin voltage is
clamped to about 13V.
The GR8837A improves the performance and
reduces the cost of power supplies. It is with 8-pin
DIP and 6-pin SOT-26 package.
Ordering and Marking Information
GR8837A
Package Code
J: DIP-8
C: SOT-26
RoHS Code
G: Green (Halogen Free) Device
L: PB Free Device
DIP-8
SOT-26
GR8837A
X X XXX
Code 1
Code 2
Serial No.
Code 1
37A X X
XXX
Code 2
Serial No.
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.
2011.03 Ver. D.Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1






GR8837A Datasheet, Funktion
Preliminary GR8837A
68
67
66
65
64
63
-40
0 40 80
Temperature ()
120 125
Fig. 7 Frequency vs. Temperature
2
5
24
23
22
21
20
-40
0 40 80
Temperature ()
120 125
Fig. 8 Green Mode Frequency vs. Temperature
2011.03 Ver. D.Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
6

6 Page









GR8837A pdf, datenblatt
Package Information
DIP-8
Preliminary GR8837A
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.
2011.03 Ver. D.Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
12

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