LT1640H Просмотр технического описания (PDF) - Linear Technology

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производитель

LT1640H

Negative Voltage Hot Swap Controller

Linear Technology 

LT1640L/LT1640H

TEST CIRCUIT

R

V+

5k

5V

VOV

PWRGD/PWRGD VDD

OV

DRAIN

LT1640L/LT1640H

UV

GATE

VUV

VEE

SENSE

Figure 1. Test Circuit

+– 48V

VDRAIN

VSENSE

1640 F01

TIMING DIAGRAMS

2V

OV

0V

GATE

1.223V

1.203V

tPHLOV

tPLHOV

1V

Figure 2. OV to GATE Timing

1V

1640 F02

2V

UV

0V

GATE

1.223V

1.243V

tPHLUV

tPLHUV

1V

Figure 3. UV to GATE Timing

1V

1640 F03

SENSE

GATE

50mV

tPHLSENSE

1V

Figure 4. SENSE to GATE Timing

1640 F04

1.8V

DRAIN

VEE

tPLHPG

1.4V

tPHLPG

PWRGD

1V

1V

VEE

1.8V

DRAIN

0V

tPLHPG

1.4V

tPHLPG

PWRGD

1V

VPWRGD – VDRAIN = 0V

1V

1640 F05

Figure 5. DRAIN to PWRGD/PWRGD Timing

1640lhfb

6

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