LM3648 datasheet(9/37 Pages) TI2

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VIN (V)

2.5

2.75

3.25

3.5

3.75

4.25

4.5

4.75

1.875

1.9

1.925

1.95

1.975

2.025

2.05

2.075

2.1

2.125

D017

TA = +25qC

TA = +85qC

TA = -40qC

VIN (V)

2.5

2.75

3.25

3.5

3.75

4.25

4.5

4.75

3.75

3.8

3.85

3.9

3.95

4.05

4.1

4.15

4.2

4.25

D017

D018

TA = +25qC

TA = +85qC

TA = -40qC

VIN (V)

2.5

2.75

3.25

3.5

3.75

4.25

4.5

4.75

1.4

1.6

1.8

2.2

2.4

2.6

2.8

D013

TA = -40qC

TA = +25qC

TA = +85qC

VIN (V)

2.5

2.75

3.25

3.5

3.75

4.25

4.5

4.75

1.4

1.6

1.8

2.2

2.4

2.6

2.8

D014

TA = -40qC

TA = +25qC

TA = +85qC

LM3648, LM3648TT

www.ti.com

SNVSA68D – OCTOBER 2014 – REVISED NOVEMBER 2016

Product Folder Links: LM3648 LM3648TT

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Typical Characteristics (continued)

TA = 25°C, VIN = 3.6 V, HWEN = VIN, CIN = COUT = 2 × 10 µF and L = 1 µH, unless otherwise noted.

ƒSW = 2 MHz

Flash

VLED = 4.5 V

Brightness Code = 0x3F

ICL = 2.8 A

Figure 18. Inductor Current Limit vs Input Voltage

ƒSW = 4 MHz

Flash

VLED = 4.5 V

Brightness Code = 0x3F

ICL = 2.8 A

Figure 19. Inductor Current Limit vs Input Voltage

Figure 20. 2-MHz Switching Frequency vs Input Voltage

Figure 21. 4-MHz Switching Frequency vs Input Voltage

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