ISL97682IRTZ-EVALZ datasheet(5/17 Pages) INTERSIL

Part #	ISL97682IRTZ-EVALZ

Description	Compact 2-3-4-Ch LED Drivers with Phase Shift Control

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Manufacturer	INTERSIL [Intersil Corporation]

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ISL97682, ISL97683, ISL97684

5

FN7689.1

May 16, 2012

5.

Absolute Maximum Ratings

Thermal Information

VIN, EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 28V

VDC, PWMI, FPWM/DirectPWM, FSW, RSET, COMP, OVP . . . -0.3V to 5.5V

CH1 to CH4, LX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 45V

PGND, AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V

Above voltage ratings are all with respect to AGND pin

Operating Conditions

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

Thermal Resistance (Typical)

θJA (°C/W)

θJC (°C/W)

16 LD TQFN (Notes 4, 5) . . . . . . . . . . . . . . .

51

4.6

Thermal Characterization (Typical)

PSIJT (°C/W)

16 Ld TQFN (Note 6). . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.11

Maximum Continuous 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.

NOTES:

4.

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.

5. For

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

6. PSIJT is the PSI junction-to-top thermal characterization parameter. If the package top temperature can be measured with this rating then the die

junction temperature can be estimated more accurately than the

θJC and θJC thermal resistance ratings.

Electrical Specifications All specifications below are characterized at TA = -40°C to +85°C; VIN = 12V, EN = 5V, RSET = 20kΩ,

unless otherwise noted. Boldface limits apply over the operating temperature range, -40°C to +85°C.

PARAMETER

DESCRIPTION

CONDITION

MIN

(Note 7)

TYP

MAX

(Note 7)

UNIT

GENERAL

VIN

Backlight Supply Voltage, (Note 8)

TA = +25°C

4.0

26.5

V

IVIN

VIN Active Current

EN = 3.3V

5

mA

IVIN_STBY

VIN Shutdown Current

EN = 0V, TA = 25°C

5

µA

VOUT

Output Voltage

4.0V < VIN ≤ 26.5V

45

V

VUVLO

Undervoltage Lockout Threshold

2.2

2.5

V

VUVLO_HYS

Undervoltage Lockout Hysteresis

100

mV

LINEAR REGULATOR

VDC

LDO Output Voltage

VIN > 6V

4.6

4.8

5

V

VLDO

VDC LDO Dropout Voltage

VIN = 5V, IVDC = 20mA

30

200

mV

ENLow

Guaranteed Range for EN Input Low Voltage

0.5

V

ENHi

Guaranteed Range for EN Input High Voltage

1.5

V

tEN(Low)

EN low time before shut-down

29.5

ms

BOOST SWITCHING REGULATOR

SS

Soft-start

100% LED Duty Cycle

7

ms

SWILimit

Boost FET Current Limit

1.4

1.8

2.3

A

rDS(ON)

Internal Boost Switch ON-Resistance

500

m

Ω

Eff_peak

Peak Efficiency

VIN = 24V, 48 LEDs, 30mA

each, L = 10µH with DCR

≤100mΩ, TA = +25°C

90.1

%

VIN = 12V, 48 LEDs, 30mA

each, L = 10µH with DCR

≤

100m

Ω, TA = +25°C

87

%

DMAX

Boost Maximum Duty Cycle

VFSW < 2.4V (FSW =600kHz)

92

%

VFSW > 2.4V

(FSW =1.0MHz)

85

%

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