LM3556 datasheet(9/31 Pages) TI1

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100 ms/DIV

2V/DIV

VOUT

500 mA/

DIV

IIN

STROBE

ILED

2V/DIV

1A/DIV

100ms/DIV

2V/DIV

VOUT

500mA/

DIV

IIN

STROBE

ILED

2V/DIV

1A/DIV

2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2

3.34

3.36

3.38

3.40

3.42

3.44

3.46

3.48

3.50

3.52

VIN (V)

25°C

- 40°C

85°C

1 ms/DIV

1V/DIV

VOUT

1A/DIV

IIN

VIN

ILED

2V/DIV

1A/DIV

2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2

1.95

2.00

2.05

2.10

2.15

2.20

2.25

2.30

VIN (V)

25°C

- 40°C

85°C

2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4

2.4

2.5

2.6

2.7

2.8

2.9

3.0

3.1

VIN (V)

25°C

- 40°C

85°C

LM3556

www.ti.com

SNVS796C – AUGUST 2011 – REVISED APRIL 2013

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

Input Current Limit

Over-Temperature and VIN

Current Limit = 1.9A

Current Limit = 2.5A

Figure 14.

Figure 15.

Input Current Limit

Over-Temperature and VIN

Startup Plot with part in Boost Mode

Current Limit = 3.1A

Current Limit = 1.7A

Figure 16.

Figure 17.

Strobe with Edge-Triggered Signal (400ms)

Strobe with Level-Triggered Signal (400ms)

Figure 18.

Figure 19.

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