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| 型号： | TPS40190DRCRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 360 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件页数： | 24/25页 |
| 文件大小： | 615K |
| 代理商： | TPS40190DRCRG4 |
www.ti.com
Relative
Change
50
25
0
25
50
75
100
0.7
0.8
0.9
1.0
1.1
1.3
1.2
Short Circuit
Threshold
Voltage
FET
Resistance
TJ Junction Temperature °C
I
SCP(max) +
V
ILIM(max)
R
DS(onMIN)
(1)
I
SCP(min) +
V
ILIM(min)
R
DS(onMAX)
(2)
SLUS658B – JULY 2005 – REVISED AUGUST 2007
RELATIVE SHORT CIRCUIT THRESHOLD CHANGE
vs
TEMPERATURE
Figure 3.
Table 1. Short Circuit Threshold Voltage Selection
Short Circuit Protection
Nominal Current Limit
Resistance
Voltage
RCOMP (k)
VILIM (mV )
10.8 to 13.2
460
OPEN
320
3.6 to 4.4
160
The range of short circuit current thresholds that can be expected is given by Equation 1 and Equation 2.
where
I
SCP is the short circuit current
V
ILIM is the short circuit threshold
R
DS(on) is the channel resistance of the high-side MOSFET
8
Copyright 2005–2007, Texas Instruments Incorporated
Product Folder Link(s): TPS40190
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