EL1848IWT-T7 datasheet(7/12 Pages) INTERSIL

Part #	EL1848IWT-T7

Description	White LED Step-Up Regulator

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Manufacturer	INTERSIL [Intersil Corporation]

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7

FIGURE 10A. 3 LEGS OF 3 LEDs IN A SERIES

FIGURE 10B. EFFICIENCY vs IO

FIGURE 10.

FIGURE 11. PACKAGE POWER DISSIPATION vs AMBIENT

TEMPERATURE

FIGURE 12. PACKAGE POWER DISSIPATION vs AMBIENT

TEMPERATURE

Typical Performance Curves (Continued)

All performance curves and waveforms are taken with C1 = 4.7µF, C2 = 1µF, C3 = 0.1µF, L = 33µF, VIN = 3.3V, VCNTL = 1V, R1 =5Ω, 3 LEDs in a

series; unless otherwise specified.

LX

VIN

VOUT

CS

PGND

SGND

CNTL

COMP

4.7µF

0.1µF

1µF

L

15µH

BAT54HT1

VIN

25

16

3

7

4

8

VCTRL

5

Ω

5

Ω

5

Ω

3 LEGS OF 3 LEDs IN A SERIES

95

90

80

75

70

15

35

55

75

IO (mA)

L=SUMIDA CMD13D13-15µH

VIN=4.2V

VIN=2.7V

85

95

JEDEC JESD51-7 HIGH EFFECTIVE

THERMAL CONDUCTIVITY TEST BOARD

1

0.9

0.6

0.4

0.3

0.2

0.1

0

25

50

75

100

125

AMBIENT TEMPERATURE (°C)

85

870mW

θJA=115°C/W

MSOP8/10

0.8

0.5

0.7

JEDEC JESD51-3 LOW EFFECTIVE

THERMAL CONDUCTIVITY TEST BOARD

0.6

0.4

0.3

0.2

0.1

0

255075

100

125

AMBIENT TEMPERATURE (°C)

85

486mW

θJA=206°C/W

MSOP8/10

0.5

EL1848

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