TPS51218

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SLUS935B

– MAY 2009 – REVISED FEBRUARY 2012

ELECTRICAL CHARACTERISTICS (continued)

over recommended free-air temperature range, V5IN=5V. (Unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

PROTECTION: CURRENT SENSE

TRIP source current

9

10

11

μA

TRIP current temperature

On the basis of 25

°C

4700

ppm/

°C

coeffficient

Current limit threshold setting

0.2

3

V

range

355

375

395

Current limit threshold

185

200

215

mV

17

25

33

–395

–375

–355

Negative current limit threshold

–215

–200

–185

mV

–33

–25

–17

Positive

3

15

Adaptive zero cross adjustable

mV

range

Negative

–15

–3

PROTECTION: UVP AND OVP

OVP trip threshold

OVP detect

115%

120%

125%

OVP propagation delay time

50-mV overdrive

1

μs

Output UVP trip threshold

UVP detect

65%

70%

75%

Output UVP propagation delay

0.8

1

1.2

ms

time

Output UVP enable delay time

From Enable to UVP workable

1.0

1.2

1.4

ms

UVLO

Wake up

4.20

4.38

4.50

V5IN UVLO threshold

V

Shutdown

3.7

3.93

4.1

THERMAL SHUTDOWN

145

Thermal shutdown threshold

°C

10

(3)

Ensured by design. Not production tested.

Copyright

© 2009–2012, Texas Instruments Incorporated

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