High-Power LED Driver with Integrated High-Side LED

Current Sense and PWM Dimming MOSFET Driver

4

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum On-Time

On-time includes blanking time

100

ns

Duty Cycle

(Note 4)

90

99.5

%

CURRENT PEAK LIMIT COMPARATOR

Trip Threshold Voltage

0.25

0.3

0.35

V

Propagation Delay

50mV overdrive with respect to NDRV

40

ns

OVERVOLTAGE PROTECTION INPUT (OVP+)

OVP+ On Threshold Voltage

1.375

1.435

1.495

V

OVP+ Hysteresis

200

mV

OVP+ Input Leakage Current

-1

+1

µA

HIGH-SIDE LED SHORT COMPARATOR

Off Threshold

4.0

4.3

4.6

V

On Threshold

4.1

4.4

4.7

V

Error Reject Blankout

256

µs

LOW-SIDE LED SHORT COMPARATOR

Off Threshold

0.27

0.30

0.33

V

Error Reject Blankout

5µs

HICCUP TIMER

Hiccup Time

8.2

ms

GATE-DRIVER OUTPUT (NDRV)

NDRV Peak Pullup Current

3

A

NDRV Peak Pulldown Current

3

A

1.2

1.9

Ω

0.9

1.7

Ω

DIMOUT

DIMOUT Peak Pullup Current

25

50

mA

DIMOUT Peak Pulldown Current

25

50

mA

31

Ω

25

Ω

PWMDIM to DIMOUT

Propagation Delay

200

ns

FAULT FLAG (

FLT)

FLT Pulldown Current

2

5

10

mA

FLT Leakage Current

I1I

µA

Thermal Warning On Threshold

+140

°C

Thermal Warning Threshold

Hysteresis

20

°C

Note 4: Not production tested. Guaranteed by design.