Transcript MOSFET for VGA Card Rm.1602,Blk A,New Trade Plaza No.6 Ping St. Shatin.H.K. E-mail:

華瑞股份有限公司
CHINO-EXCEL TECHNOLOGY CORP.
MOSFET for VGA Card
Rm.1602,Blk A,New Trade Plaza
No.6 Ping St. Shatin.H.K.
E-mail: [email protected]
TEL:852 -2649 8901
FAX:852- 2649 9164
www.cetsemi.com
VGA Card
•VGA Card Function Block
•GPU Introduction
•常用 DC/DC 轉換方式
•Linear Regulator 的優缺點
•Buck Regulator 的優缺點
•VGA Card Power Solution
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VGA Card Function Block
VGA Card
M/B
DDR
DC/DC
Display
Port
GPU
DC Fan
GPU : Graphics Process Unit
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CPU
AGP Slot
North Bridge
DDRΠ
GPU Introduction
GPU
Process
Memory Interface
Frame Buffer
GPU
Process
Memory Interface
Frame Buffer
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NV34
Ge Force FX 5200
0.13um
128bit
128MB / DDRⅡ
nVIDIA
NV31
Ge Force FX 5600
0.13um
256bit
256MB / DDRⅡ
NV35
Ge Force FX 5600
0.13um
256bit
256MB / DDR
RV280
Radeon 9200
0.15um
128bit
128MB / DDRⅡ
ATi
RV250
Radeon 9600
0.15um
128bit
128MB / DDRⅡ
RV350
Radeon 9800
0.15um
256bit
256MB / DDRⅡ
常用 DC/DC 轉換方式
降壓轉換器
( Step Down Regulator )
線性轉換器
( Linear Regulator )
圖(一)
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切換式的轉換器
( Buck Regulator )
圖(二)
Linear Regulator 的優缺點
Linear Regulator :
MOSFET 的消耗功率(P) = 輸出輸入電壓差(V) * 輸出電流值(Io)
所以, 選擇元件應考慮封裝尺寸較大的 TO-263 或 TO-252 以達到
較好的散熱規格.
優點 : 電路架構簡單 , 輸出雜訊低 , 快速暫態響應 , 整體成本低 .
缺點 : 效率差 .
Remark:
使用 MOSFET 控制 IC : TI ( TL431, TL432 ) .
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Buck Regulator的優缺點
Buck Regulator :
MOSFET 的 消耗功率(P) = 靜態導通損耗 + 動態切換損耗,
所以, 選擇元件除應考慮導通電阻較小外, 尚需考慮 Qg, Tr, Tf 值也小
以達到有較好的特性.
優點 : 效率高, 低靜態電流, 靈活電源管理機制.
缺點 : 零件多, 成本高.
Remark:
使用 MOSFET 控制 IC : Intersil ( ISL6529, HIP6012 ), NS ( LM2636M ),
ON SEMI ( CS51031 ), IR ( IRU3037A )
SEMTECH ( SC1175) 等等.
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VGA Card Power Solution (1)
nVIDIA :
PWM
MOSFET
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nVIDIA
NV34 / NV31 / NV35
Reference Solution
CET Solution
ISL6529
X
HIP6012
X
CEM4410A
CEM4804
CEU3700
CES2324
CES7002A
Package
SO14
SO14
SO8
SO8
TO252
SOT23
SOT23
VGA Card Power Solution (2)
ATi :
PWM
MOSFET
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RV280
Reference Solution
CS51031
LM2636M
IRU3037A
IRU3037ACS
IRU3037CS
SC1175
ATi
RV250
CET Solution
X
X
X
X
X
X
CEM4435
CEM9424
CEM9424
CEM9926
CEU3700
CEM9410
CEM4410A
CEM4804
CES7002A
RV350
Package
SO8
SO20
SO8
SO8
SO8
SO20
SO8
SO8
SO8
SO8
TO252
SO8
SO8
SO8
SOT23
MOSFET Selection for VGA Card
P/N
CEB21A3
CEB603AL
CEB703AL
CEU85A3
CEU75A3
CEU83A3
CEU3040
CEU3050
CEU3060
CEU3070
CEU3080
CEU3700
CEU21A3
CEU603AL
CEM8912
CEM3258
CES2305
CES2313
CES2308
CES2312
CEM4892
CEM3082
CEM3178
CEM2163
CEM9424
CEM4311
CEM4435A
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BVDSS
30V
30V
30V
25V
25V
30V
30V
30V
30V
30V
30V
30V
30V
30V
30V
30V
-30V
-30V
20V
20V
30V
30V
30V
-20V
-20V
-30V
-30V
VGS
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±20V
±8V
±8V
±20V
±20V
±20V
±8V
±8V
±20V
±20V
VGS(th)
0.8V~2.5V
1V~3V
1V~3V
1V~3V
1V~3V
1V~3V
1V~3V
1V~3V
1V~3V
1V~3V
1V~3V
1V~2.5V
0.8V~2.5V
1V~3V
1V~3V
1V~3V
-1V~ -3V
-1V~ -3V
0.5V~1V
0.5V~1V
1V~3V
1V~3V
1V~3V
-1V~-3V
-1V~-3V
-1V~-3V
-1V~-3V
RDS
36m-45m@10V
17m-22m@10V
14m-17m@10V
6m@10V
9m@10V
6m@10V
4.2~5m@10V
6m@10V
6.6m@10V
7.8~9.5m@10V
10m@10V
73m-95m@10V
36m-45m@10V
18m-22m@10V
24m-28m@10V
22~28m@10V
50m@-10V
60m@-10V
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[email protected]
12m(10V)
8.5~10.5m(10V)
18~22m(10V)
16~20m(-4.5V)
20~25m(-4.5V)
18m(-10V)
20m(-10V)
ID
25A
25A
40A
80A
65A
80A
85A
80A
75A
62A
57A
12A
20A
20A
7A
7A
-4.2A
-3.6A
5.4A
4.5A
12A
12A
7.6A
-8.9A
-7.7A
-9.3A
-8A
Type
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
P
P
N
N
N
N
N
P
P
P
P
Package
TO-263
TO-263
TO-263
TO-252
TO-252
TO-252
TO-252
TO-252
TO-252
TO-252
TO-252
TO-252
TO-252
TO-252
SO8D
SO8D
SOT-23
SOT-23
SOT-23
SOT-23
SO-8
SO-8
SO-8D
SO-8
SO-8
SO-8
SO-8
Application
DDR / AGP / VGA Card
DDR / AGP / VGA Card
DDR / AGP / VGA Card
DDR / AGP / VGA Card
DDR / AGP / VGA Card
DDR / AGP / VGA Card
DDR / AGP / VGA Card
DDR / AGP / VGA Card
DDR / AGP / VGA Card
DDR / AGP / VGA Card
DDR / AGP / VGA Card
DDR / VGA Card / AGP
DDR / VGA Card / AGP
DDR / VGA Card / AGP
VGA Card
VGA Card
VGA Card
VGA Card
VGA Card
VGA Card
VGA Card
VGA Card
VGA Card
VGA Card
VGA Card
VGA Card
VGA Card
華瑞股份有限公司
CHINO-EXCEL TECHNOLOGY CORP.
THANK YOU !
Rm.1602,Blk A,New Trade Plaza
Rm.1602,Blk A,New Trade Plaza
No.6
No.6Ping
PingSt.St.Shatin.H.K.
Shatin.H.K.
E-mail:
[email protected]
Http://www.goldfullsemi.com
TEL:852
8901
TEL:852-2649
-2649
8901
FAX:8529164
FAX:852-2649
2649
9164
www.cetsemi.com