LM3550 datasheet(8/37 Pages) TI1

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BRC (#)

220

200

180

160

140

120

100

TA = +25°C

VIN = 3.6V, VLED = 3.3V

TA = +85°C

TA = -30°C

VIN (V)

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

TA = -30°C

TA = +85°C

TA = +25°C

Torch Code = 0, VLED = 3.3V

VIN (V)

100

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

VLED = 3.0V

VLED = 3.3V

VLED = 3.6V

ILED = 100 mA

VIN (V)

100

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

VLED = 3.0V

VLED = 3.3V

VLED = 3.6V

ILED = 200 mA

VIN (V)

0.50

0.45

0.40

0.35

0.30

0.25

0.20

2.7

3.3

3.8

4.4

4.9

5.5

TA = +85°C

IOUT = 200 mA, 5.0V Fixed Voltage Mode

TA = -30°C

TA = +25°C

VIN (V)

0.50

0.45

0.40

0.35

0.30

0.25

0.20

2.7

3.3

3.8

4.4

4.9

5.5

TA = +85°C

IOUT = 200 mA, 4.5V Fixed Voltage Mode

TA = -30°C and +25°C

LM3550

SNVS569B – MAY 2009 – REVISED MAY 2013

www.ti.com

Typical Performance Characteristics (continued)

Unless otherwise specified: TA = 25°C; VIN = 3.6V; CIN = 4. 7 µF, COUT = 2.2 µF, C1 = C2 = 1 µF. Super-Capacitor = 0.5F

TDK EDLC272020-501-2F-50,

Input Current

vs.

Input Voltage

5.0V Mode

4.5V Mode

Figure 15.

Figure 16.

LED Efficiency

vs.

Input Voltage

Torch Mode, 100 mA

Torch Mode, 200 mA

Figure 17.

Figure 18.

Torch Current

vs.

Input Voltage

Brightness Code

Code = 0

Figure 19.

Figure 20.

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