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PDF GR8876 Data sheet ( Hoja de datos )
| Número de pieza | GR8876 | |
| Descripción | Green-Mode PWM Controller | |
| Fabricantes | grenergy | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de GR8876 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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GR8876
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)
VCC over-voltage clamp
Gate output voltage clamp
Soft driving for reducing EMI
Over-voltage protection (OVP) on Vcc pin
Over-load protection (OLP)
Over-current protection (OCP) on CS pin
500mA driving capability
Applications
Open-frame SMPS
● Switching AC/DC adapter and battery charger
Description
The GR8876 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
resistance can be saved in order to limit the power
cost. 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. GR8876 provides
several protections such as OLP, OVP, and OCP for
fault conditions. The GR8876 improves the
performance and reduces the cost of power
supplies. It is available in both 8-pin SOP and 8-pin
DIP package.
Ordering and Marking Information
DIP-8
GR8876
XXXXX
SOP-8
GR8876
XXXXX
XXXXX – Date Code
XXXXX – Date Code
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.
2009.06 Ver. 1.2 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
GR8876
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
11
10.2
off/V 9.4
UVLO 8.6
7.8
7
-40
0 40
t/℃
Fig.4
80
120
70
68
f/KHzOSC
66
64
62
60
-40 0
40 80 120
t/℃
25
23
f/KHzG 1291
17
15
-40
Fig.5
2009.06 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
0 40
t/℃
Fig.6
80
120
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
GR8876, SOP-8
PC817, DIP-4
TSM103, SOP-8
N.A.
GR8876
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
2009.06 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet GR8876.PDF ] | |
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