IFlash

(0A to 3A)

VCAP

(2V/div.)

ICharge

(200mA/div.)

TIME (200 ms/div.)

IIN

(200mA/div.)

EOCB

IFlash

(0A to 3A)

TIME (1 Ps/div.)

VSTROBE

(2V/div.)

VIN

(2V/div.)

VCAP

(2V/div.)

ICharge

(200 mA/div.)

TIME (1s/div.)

EOCB

IIN

(200 mA/div.)

IFlash

(0A to 3A)

VCAP

(2V/div.)

ICharge

(200mA/div.)

TIME (20 ms/div.)

IIN

(200mA/div.)

VIN (V)

5.0

4.9

4.8

4.7

4.6

4.5

4.4

4.3

4.2

4.1

4.0

2.5

3.1

3.7

4.3

4.9

5.5

VLED = 1.5V

VLED = 1.8V

VLED = 2.4V

VLED = 2.0V

VIN (V)

5.0

4.9

4.8

4.7

4.6

4.5

4.4

4.3

4.2

4.1

4.0

2.5

3.1

3.7

4.3

4.9

5.5

TA = -30°C

VLED = 2.0V

TA = +25°C

TA = +85°C

10

LM3550

SNVS569C – MAY 2009 – REVISED OCTOBER 2016

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Product Folder Links: LM3550

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Copyright © 2009–2016, Texas Instruments Incorporated

Typical Characteristics (continued)

Unless otherwise specified: TA = 25°C; VIN = 3.6 V; CIN = 4.7 µF, COUT = 2.2 µF, C1 = C2 = 1 µF. Super capacitor = 0.5 F

TDK EDLC272020-501-2F-50.

Figure 24. Indicator Current vs Input Voltage Different VLED

Figure 25. Indicator Current vs Input Voltage Tri-Temp

Figure 26. 5.3-V Mode Super Capacitor Charge

Figure 27. 2 LED, 3-A Flash (1.5 A Each)

Figure 28. 5.3-V Mode Super Capacitor Recharge

Figure 29. Strobe-to-Flash Delay