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PDF GR8876A Data sheet ( Hoja de datos )
| Número de pieza | GR8876A | |
| Descripción | Green-Mode PWM Controller | |
| Fabricantes | grenergy | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de GR8876A (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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GR8876A
Green-Mode PWM Controller with Integrated Protections
Features
High-voltage (500V) startup circuit
Current mode PWM
Very low startup current (<20uA)
Under-voltage lockout (UVLO)
Non-audible-noise green-mode control
Programmable switching frequency
Cycle-by-cycle peak current limiting
Internal leading-edge blanking
Internal slope compensation
Internal 4ms soft start (Fs = 65KHz)
Gate output voltage clamp
Soft driving for reducing EMI
Over-voltage protection (OVP) on Vcc pin
Over-load protection (OLP)
500mA driving capability
Ordering and Marking Information
Applications
Open-frame SMPS
● Switching AC/DC adapter
Description
The GR8876A is a highly-integrated, low startup
current, current mode PWM controller with
green-mode function and high-voltage start up
circuit. A high-voltage current source supplies the
start up current and the traditional start-up resistor
can be saved in order to reduce the power
dissipation due to start-up resistor. The controller
also includes the leading-edge blanking of the
current sensing, internal slope compensation and
cycle-by-cycle peak current limiting. It is also
integrated soft driving for reducing EMI, gate output
voltage clamp function for protecting power
MOSFET. GR8876A provides several protections
such as OLP, OVP, and OCP for fault conditions.
The GR8876A improves the performance and
reduces the cost of power supplies. It is available in
both 8-pin SOP,7-pin SOP and 8-pin DIP package.
DIP-8/SOP-8/SOP-7
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.
2010.10 Ver. 1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1
1 page  
Typical Performance Characteristics
1.8
1.6
Current/mA
1.4
1.2
HV 1
0.8
0.6
-40
0 40
t/℃
Fig. 1
80
120
GR8876A
0.85
0.84
off/V0.83
Vcs0.82
0.81
0.8
-40
0 40
t/℃
Fig. 2
80
120
17
16.2
on/V15.4
UVLO14.6
13.8
13
-40
0
℃40 80
t/
120
Fig. 3
70
68
f/KHzOSC
66
64
62
60
-40
0 40 80
t/℃
Fig. 5
120
11
10.2
off/V 9.4
UVLO 8.6
7.8
7
-40
0 40
t/℃
Fig. 4
80
120
25
23
f/KHzG 1291
17
15
-40
0 40
t/℃
Fig. 6
80
120
2010.10 Ver. 1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
5
5 Page 
Bom List (Cont.)
33 PCB
34 Q1
35 Q2
36 Q3
37 R1A, R1B
38 R2, R7, R8, R11, R14, R17, R32
39 R3A, R3B
40 R4A, R4B, R5A, R5B
41 R6, R33, R34
42 R9
43 R10
44 R12
45 R13
46 R15A, R15B
47 R16
48 R18
49 R19
50 R20
51 R21
52 R22
53 R23
54 R24
55 R25, R26
56 R28
57 R29,R30
58 R31
59 T1
60 U1
61 U2
62 U3
63 ZD1
FR4, 102mm*39.0mm*1.0mm
FPQF10N60,T0220
N.A.
N.A.
％1M, 5 , SMD1206
N.A.
N.A.
％68K, 5 , SMD1206
0R, SMD0805
％0.33R, 1W, 1 , Rcs
％2.2R, 5 , SMD1206
％100K, 1 , SMD0805
％33R, 5 , SMD0805
％22R, 5 , SMD1206
0.0170R, 4.0mm
％68K, 1 , SMD0805
％62K, 5 , SMD0805
％100R, 5 , SMD0805
％1.5K, 5 , SMD0805
％10R, 5 , SMD0805
％2.2K, 5 , SMD0805
％16.5K, 1 , SMD0805
％5K, 1 , SMD0805
％15K, 5 , SMD0805
％4.3K,1 , SMD0805
％1.5K, 1 , DIP
P0T-3019, 550uH
GR8876A, SOP-8
PC817, DIP-4
TSM103, SOP-8
N.A.
GR8876A
1
1
2
4
3
1
1
1
1
2
1
1
1
1
1
1
1
1
2
1
2
1
1
1
1
1
2010.10 Ver. 1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet GR8876A.PDF ] | |
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