UCC28019P datasheet(3/48 Pages) TI

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ELECTRICAL CHARACTERISTICS

UCC28019

SLUS755 – APRIL 2007

Unless otherwise noted, VCC = 15 V

DC, 0.1 µF from VCC to GND, -40°C ≤ TJ = TA ≤ 125°C. All voltages are with respect to

GND. Currents are positive into and negative out of the specified terminal.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VCC Bias Supply

IVCC(start)

Pre-start current

VCC = VCCON– 0.1 V

100

200

µA

IVCC(stby)

Standby current

VSENSE = 0.5 V

1.0

2.1

2.9

IVCC(on_load)

Operating current

VSENSE = 4.5 V, CGATE = 4.7 nF

Under Voltage Lockout (UVLO)

VCCON

Turn on threshold

10.0

10.5

11.0

VCCOFF

Turn off threshold

9.5

UVLO

Hysteresis

0.8

1.0

1.2

Oscillator

TA = 25°C

61.7

65.0

68.3

fSW

Switching frequency,

kHz

– 40°C

≤ T

A ≤ 125°C

PWM

VCOMP = 0 V, VSENSE = 5 V,

DMIN

Minimum duty cycle

ICOMP = 6.4 V

DMAX

Maximum duty cycle

VSENSE = 4.95 V

94%

97%

99.3%

tOFF(min)

Minimum off time

VSENSE = 3 V, ICOMP = 1 V

100

250

600

System Protection

ISENSE threshold, soft over current

VSOC

-0.66

-0.73

-0.79

(SOC) ,

ISENSE threshold, peak current Limit

VPCL

-1.00

-1.08

-1.15

(PCL) ,

VSENSE threshold, open loop

ICOMP = 1 V, ISENSE = 0 V,

VOLP

0.77

0.82

0.86

protection (OLP),

VCOMP = 1 V

Open loop protection (OLP) internal

VSENSE = 0.5 V

100

250

pull-down current

VSENSE threshold, output

VUVD

4.63

4.75

4.87

under-voltage detection (UVD),

VSENSE threshold, output

VOVP

ISENSE = -0.2 V

5.12

5.25

5.38

over-voltage protection (OVP),

Input brown-out detection (IBOP)

VINSBROWNOUT_th

0.76

0.82

0.88

high-to-low threshold

Input brown-out Detection (IBOP)

VINSENABLE_th

1.4

1.5

1.6

low-to-high threshold

IVINS_0 V

VINS bias current

VINS = 0 V

±0.1

µA

ICOMP threshold, external overload

0.6

protection

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