ISL97634IRT14Z-TK datasheet(2/10 Pages) INTERSIL

Part #	ISL97634IRT14Z-TK

Description	White LED Driver with Wide PWM Dimming Range

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Manufacturer	INTERSIL [Intersil Corporation]

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2

FN6264.2

April 10, 2007

Absolute Maximum Ratings (TA = +25°C)

Thermal Information

Input Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V

LX Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 28V

FBSW Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 28V

All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V

Operating Conditions

Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C

Thermal Resistance

θJA (°C/W) θJC (°C/W)

TDFN Package (Notes 1, 2). . . . . . . . .

77

12

Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +125°C

Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C

Lead Temperature (Soldering 10s) . . . . . . . . . . . . . . . . . . . . +300°C

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the

device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed over temperature of -40°C to +85°C unless otherwise stated. Typ values are for

information purposes only at TJ = TC = TA = +25°C.

NOTE:

1.

θ

JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See

Tech Brief TB379.

2. For

θJC, the “case temp” location is the center of the exposed metal pad on the package underside.

Electrical Specifications

VIN = VPWM/EN = 3V

PARAMETER

DESCRIPTION

CONDITION

MIN

TYP

MAX

UNIT

VIN

Supply Voltage

2.4

5.5

V

IIN

Supply Current

PWM/EN = 3V, enabled, not switching

0.8

1.5

mA

PWM/EN = 0V, disabled

1

μA

fSW

Switching Frequency

1,300

1,450

1,600

kHz

DMAX

Maximum Switching Duty

Cycle

90

95

%

ILIM

LX Current

400

470

mA

RSW(LX)

LX Switch ON-Resistance

ILX = 100mA

900

m

Ω

ILEAK

LX Switch Leakage Current

VLX = 28V

0.01

1

μA

VFB

Feedback Voltage

90

95

100

mV

IFB

FB Pin Bias Current

VFB = 95mV

1

μA

RSW(FBSW)

FBSW Switch ON-Resistance

10

Ω

VDIODE

Schottky Diode Forward

Voltage

IDIODE = 100mA, TA = +25°C

600

850

mV

OVP

Overvoltage Protection

ISL97634IRT14Z

14

V

ISL97634IRT18Z

18

V

ISL97634IRT26Z

26

28

V

VIL

Logic Low Voltage of

PWM/EN

0.6

V

VIH

Logic High Voltage of

PWM/EN

1.5

V

ISL97634

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