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參數(shù)資料
| 型號(hào)： | G525A1 |
| 廠商： | Global Mixed-mode Technology Inc. |
| 英文描述： | USB High-Side Power Switch Advance Information |
| 中文描述： | 的USB高側(cè)電源開關(guān)進(jìn)展信息 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大小： | 243K |
| 代理商： | G525A1 |
Ver: 1.2
Nov 11, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
7
G525A
Global Mixed-mode Technology Inc.
Figure 3. Inrush Current-Limit Application
EN, the enable Input
EN, with 0.2V hysteresis, must be driven logic high or
logic low for a clearly defined input. Floating the input
may cause unpredictable operation. EN should not be
allowed to go negative with respect to GND.
Soft Start
The G525A is high impedance when off and slowly
becomes a low impedance as it turns on. This reduces
inrush current and related voltage drop that results
from charging a capacitive load, satisfying the USB
voltage drop requirements, for bus-powered applica-
tions as shown in Figure 2.
The soft start circuit shown in Figure 3 can be utilized
to meet USB transient regulation specifications with
large load capacitances (CBULK >10F). The G525A
will provide inrush current limiting for these applica-
tions.
Transient Overcurrent Filter
Figure 4. Transient Filter
The inrush current from the connection of a heavy ca-
pacitive load may cause the fault flag to fall for a short
duration while the switch is in a constant-current mode,
for charging the capacitance. If needed, a simple 1ms
RC low-pass filter in series with the fault flag circuit
will prevent erroneous overcurrent reporting (see Fig-
ure 4).
EN
FLG
GND
NC
OUT
IN
OUT
NC
USB
Function
USB
Controller
V
BUS
Cable
4.7
F
GND
USB Hub
C
BULK
G525A
USB Peripheral
18
2
7
3
6
4
5
EN
FLG
GND
NC
OUT
IN
OUT
NC
USB
Function
USB
Function
USB
Controller
USB
Controller
V
BUS
Cable
4.7
F
GND
USB Hub
C
BULK
G525A
USB Peripheral
18
2
7
3
6
4
5
OVERCURRENT
To USB
0.1 F
10k
V
＋
1
2
3
4
5
6
7
8
G525A
EN
FLG
GND
NC
OUT
IN
OUT
NC
OVERCURRENT
0.1 F
10k
V
＋
1
2
3
4
5
6
7
8
G525A
EN
FLG
GND
NC
OUT
IN
OUT
NC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| G525A2 | USB High-Side Power Switch Advance Information |
| G528A | USB High-Side Power Switch Advance Information |
| G528AP1U | USB High-Side Power Switch Advance Information |
| G528AP1UF | USB High-Side Power Switch Advance Information |
| G528P1U | USB High-Side Power Switch Advance Information |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| G525A2 | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:USB High-Side Power Switch Advance Information |
| G526 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dual USB High-Side Power Switch |
| G526-1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dual USB High-Side Power Switch |
| G526-2 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dual USB High-Side Power Switch |
| G528 | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:USB High-Side Power Switch Advance Information |
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