ISL97634 Просмотр технического описания (PDF) - Intersil

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Компоненты Описание

производитель

ISL97634

White LED Driver with Wide PWM Dimming Range

Intersil 

ISL97634

Absolute Maximum Ratings (TA = +25°C)

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 Information

Thermal Resistance

θJA (°C/W) θJC (°C/W)

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

77

12

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

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

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and

result in failures not covered by warranty.

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. θJA 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

VIN

Supply Voltage

IIN

Supply Current

PWM/EN = 3V, enabled, not switching

PWM/EN = 0V, disabled

fSW

DMAX

Switching Frequency

Maximum Switching Duty

Cycle

ILIM

RSW(LX)

ILEAK

LX Current

LX Switch ON-Resistance

LX Switch Leakage Current

ILX = 100mA

VLX = 28V

VFB

Feedback Voltage

IFB

FB Pin Bias Current

VFB = 95mV

RSW(FBSW)

VDIODE

FBSW Switch ON-Resistance

Schottky Diode Forward

Voltage

IDIODE = 100mA, TA = +25°C

OVP

Overvoltage Protection

ISL97634IRT14Z

ISL97634IRT18Z

ISL97634IRT26Z

VIL

Logic Low Voltage of

PWM/EN

VIH

Logic High Voltage of

PWM/EN

PWM_on Minimum PWM On-Time

EN_delay EN to Vout Delay

MIN

2.4

1,300

90

400

90

600

14

18

26

1.5

TYP

0.8

1,450

95

470

900

0.01

95

10

1.5

200

MAX

5.5

1.5

1

1,600

1

100

1

850

28

0.6

UNIT

V

mA

µA

kHz

%

mA

mΩ

µA

mV

µA

Ω

mV

V

V

V

V

V

µs

µs

2

FN6264.3

March 7, 2008

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