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TPS40190DRCTG4 Datasheet(PDF) 8 Page - Texas Instruments

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No. de pieza TPS40190DRCTG4
Descripción Electrónicos  LOW PIN COUNT SYNCHRONOUS BUCK CONTROLLER
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TPS40190DRCTG4 Datasheet(HTML) 8 Page - Texas Instruments

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−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
ISCP(max) +
VILIM(max)
RDS(onMIN)
(1)
ISCP(min) +
VILIM(min)
RDS(onMAX)
(2)
TPS40190
SLUS658A–JULY 2005–REVISED AUGUST 2005
APPLICATION INFORMATION (continued)
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 (kΩ)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
ISCP is the short circuit current
VILIM is the short circuit threshold
RDS(on) is the channel resistance of the high-side MOSFET
8


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