UCC28600

SLUS646J

– NOVEMBER 2005 – REVISED JULY 2011

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ELECTRICAL CHARACTERISTICS (continued)

VDD = 15 V, 0.1-

μF capacitor from VDD to GND, 3.3-nF capacitor from SS to GND charged over 3.5 V, 500-Ω resistor from

(unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Gain, FB =

QR mode

2.5

V/V

Shutdown threshold

1.13

1.25

1.38

V

CS to output delay time (power limit)

100

175

300

ns

CS to output delay time (over current

50

100

150

fault)

CS discharge impedance

25

115

250

Ω

CS offset

0.35

0.40

0.45

V

CS current

OVP = -300

μA

-165

-150

-135

μA

CS working range

QR mode, peak CS voltage

0.70

0.81

0.92

V

PL threshold

Peak CS voltage + CS offset

1.05

1.20

1.37

Soft Start (SS)

Softstart charge current

-8.3

-6.0

-4.5

μA

Softstart discharge current

2.0

5.0

10

mA

Switching ON threshold

Output switching start

0.8

1.0

1.2

V

Overvoltage Protection (OVP)

Line overvoltage protection

-512

-450

-370

μA

OVP voltage at OUT = HIGH

-125

-25

mV

μA

Load overvoltage protection

3.37

3.75

4.13

V

Thermal Protection (TSP)

130

140

150

°C

Thermal shutdown hysteresis

15

OUT

Rise time

10% to 90% of 13 V typical out clamp

50

75

ns

Fall time

10

20

(2)

(3)

Ensured by design. Not production tested.

4

Copyright

© 2005–2011, Texas Instruments Incorporated