ZXLD1360 datasheet(2/28 Pages) ZETEX

2 / 28 page

ZXLD1360

Issue 1 - March 2007

www.zetex.com

Absolute maximum ratings (voltages to GND unless otherwise stated)

Electrical characteristics (test conditions: VIN=12V, Tamb=25°C unless otherwise stated)(a)

NOTES:

(a) Production testing of the device is performed at 25°C. Functional operation of the device and parameters specified over

a -40°C to +105°C temperature range, are guaranteed by design, characterization and process control.

(b) 100% brightness corresponds to VADJ = VADJ(nom) = VREF. Driving the ADJ pin above VREF will increase the VSENSE.

threshold and output current proportionally.

Input voltage (VIN)

-0.3V to +30V (40V for 0.5 sec)

ISENSE voltage (VSENSE)

+0.3V to -5V (measured with respect to VIN)

LX output voltage (VLX)

-0.3V to +30V (40V for 0.5 sec)

Adjust pin input voltage (VADJ)-0.3V to +6V

Switch output current (ILX)

1.25A

Power dissipation (Ptot)

(Refer to package thermal de-rating curve on page 16)

Operating temperature (TOP)

-40 to 125°C

Storage temperature (TST)

-55 to 150°C

Junction temperature (Tj MAX)150°C

These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure. Operation

at the absolute maximum ratings, for extended periods, may reduce device reliability.

Thermal resistance

Junction to ambient (R JA)125°C/W

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

VIN

Input voltage

VSU

Internal regulator start-up threshold VIN rising

5.65

VSD

Internal regulator shutdown

threshold

VIN falling

5.55

IINQoff

Quiescent supply current

with output off

ADJ pin grounded

IINQon

Quiescent supply current

with output switching

ADJ pin floating

f = 250kHz

1.8

5.0

VSENSE

Mean current sense threshold

voltage

(Defines LED current setting accuracy)

Measured on ISENSE

pin with respect to VIN

VADJ = 1.25V

100

105

VSENSEHYS Sense threshold hysteresis

±15

ISENSE

ISENSE pin input current

VSENSE = VIN -0.1

1.25

VREF

Internal reference voltage

Measured on ADJ pin

with pin floating

1.25

VREF / T Temperature coefficient of VREF

ppm/K

VADJ

External control voltage range on

ADJ pin for DC brightness control(b)

0.3

2.5

VADJoff

DC voltage on ADJ pin to switch

device from active (on) state to

quiescent (off) state

VADJ falling

0.15

0.2

0.25

VADJon

DC voltage on ADJ pin to switch

device from quiescent (off) state

to active (on) state

VADJ rising

0.20.250.3

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