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PDF GR8837A Data sheet ( Hoja de datos )
| Número de pieza | GR8837A | |
| Descripción | Green-Mode PWM Controller | |
| Fabricantes | Grenergy | |
| Logotipo |  |
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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
1 page  
Preliminary GR8837A
Typical Performance Characteristics
10.8
10.7
7.0
6.9
10.6 6.8
10.5 6.7
10.4
10.3
-40
12.0
10.0
0 40 80 120 125
Temperature (℃)
Fig. 1 UVLO (on) vs. Temperature
6.6
6.5
-40
2.2
2.0
0 40 80 120 125
Temperature (℃)
Fig. 2 UVLO (off) vs. Temperature
8.0 1.8
6.0 1.6
4.0
2.0
-40
0 40 80
Temperature (℃)
120 125
Fig. 3 VDD Start up current vs. Temperature
1.4
1.2
-40 0 40 80 120 125
Temperature (℃)
Fig. 4 Operating current vs. Temperature
4.0
3.8
3.6
3.4
3.2
3.0
-40
0 40 80
Temperature (℃)
120 125
Fig. 5 OLP Tri-p Level vs. Temperature
0.90
0.89
0.88
0.87
0.86
0.85
-40
0 40 80
Temperature (℃)
120 125
Fig. 6 Maximum Input Voltage of CS pin vs. Temperature
2011.03 Ver. D.Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
5
5 Page 
Package Information
SOT-26
Preliminary GR8837A
SYMBOL
A
A1
A2
b
c
D
E
E1
e
e1
L
θ
MILLIMETERS
MIN.
MAX.
1.45
0.00 0.15
0.90 1.30
0.30 0.50
0.08 0.22
2.70 3.10
2.60 3.00
1.40 1.80
0.95 BSC
1.90 BSC
0.30
0o
0.60
8o
SOT-26
MIN.
0.000
0.035
0.012
0.003
0.106
0.102
0.055
0.012
0o
INCHES
0.037 BSC
0.075 BSC
MAX.
0.057
0.006
0.051
0.020
0.009
0.122
0.118
0.071
0.024
8o
Note: 1. Followed from JEDEC TO-178 AB.
2. Dimension D and E1 do not include mold flash, protrusions or gate burrs. Mold flash, protrusions or
gate burrs shall not exceed 10 mil per side
2011.03 Ver. D.Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet GR8837A.PDF ] | |
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