LM3643YFFR datasheet(8/39 Pages) TI

Il numero della parte	LM3643YFFR

Spiegazioni elettronici	Synchronous Boost Dual LED Flash Driver with 1.5-A High-Side Current Sources

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Produttore elettronici	TI [Texas Instruments]

Homepage	http://www.ti.com

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VIN (V)

2.5

3

3.5

4

4.5

5

5.5

0.16

0.17

0.18

0.19

0.2

D027

LED1, TA = -40GC

LED2, TA = -40GC

LED1, TA = +25GC

LED2, TA = +25GC

LED1, TA = +85GC

LED2, TA = +85GC

VIN (V)

2.5

3

3.5

4

4.5

5

5.5

0

0.2

0.4

0.6

0.8

1

1.2

D007

TA = -40GC

TA = +25GC

TA = +85GC

VIN (V)

2.5

3

3.5

4

4.5

5

5.5

0.16

0.17

0.18

0.19

0.2

D025

TA = -40GC

TA = -+25GC

TA = +85GC

VIN (V)

2.5

3

3.5

4

4.5

5

5.5

0.16

0.17

0.18

0.19

0.2

D026

TA = -40GC

TA = -+25GC

TA = +85GC

VIN (V)

2.5

3

3.5

4

4.5

5

5.5

0.93

0.94

0.95

0.96

0.97

0.98

0.99

1

1.01

1.02

1.03

1.04

1.05

1.06

1.07

D023

TA = -40GC

TA = +25GC

TA = +85GC

VIN (V)

2.5

3

3.5

4

4.5

5

5.5

0.68

0.69

0.7

0.71

0.72

0.73

0.74

0.75

0.76

0.77

0.78

D024

LED1, TA = -40GC

LED2, TA = -40GC

LED1, TA = +25GC

LED2, TA = +25GC

LED1, TA = +85GC

LED2, TA = +85GC

LM3643, LM3643A

SNVS967A – AUGUST 2014 – REVISED NOVEMBER 2014

www.ti.com

Typical Characteristics (continued)

Ambient temperature is 25°C, input voltage is 3.6 V, HWEN = VIN, CIN = COUT = 2 × 10 µF and L = 1 µH, unless otherwise

noted .

ILED = 1 A

ƒSW = 2 MHz

Flash

ILED = 730 mA

ƒSW = 2 MHz

Flash

Figure 12. LED1/2 Current vs Input Voltage

Figure 13. LED1 and LED2 Current vs Input Voltage

ILED = 179 mA

ƒSW = 2 MHz

Torch

ILED = 179 mA

ƒSW = 4 MHz

Torch

Figure 14. LED Current vs Input Voltage

Figure 15. LED Current vs Input Voltage

ILED = 179 mA

ƒSW = 2 MHz

Torch

HWEN = 0 V

I2C = 0 V

Figure 16. LED1 and LED2 Current vs Input Voltage

Figure 17. Shutdown Current vs Input Voltage

8

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