IFlash = 3A

(100% Flash)

TIME (20 ms/div.)

VALS = 100 mV

ICharge

(500 mA/div.)

IIN

(500 mA/div.)

STROBE

IFlash = 2.1A

(70% Flash)

TIME (20 ms/div.)

VALS = 500 mV

ICharge

(500 mA/div.)

IIN

(500 mA/div.)

STROBE

IFlash = 3A

TIME (40 ms/div.)

VCAP

2V/div.

ICharge

(500 mA/div.)

IIN

(500 mA/div.)

STROBE

EOCB

IFlash = 3A

TIME (40 ms/div.)

VCAP

2V/div.

ICharge

(500 mA/div.)

IIN

(500 mA/div.)

STROBE

EOCB

IFlash = 3A

TIME (20 ms/div.)

VCAP

2V/div.

ICharge

(500 mA/div.)

IIN

(500 mA/div.)

STROBE

EOCB

IFlash = 3A

TIME (20 ms/div.)

VCAP

2V/div.

ICharge

(500 mA/div.)

IIN

(500 mA/div.)

STROBE

EOCB

11

LM3550

www.ti.com

SNVS569C – MAY 2009 – REVISED OCTOBER 2016

Product Folder Links: LM3550

Submit Documentation Feedback

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 30. Edge-Sensitive Strobe

Figure 31. Level-Sensitive Strobe

Figure 32. Flash With FGATE = 0

Figure 33. Flash With FGATE = 1

VALS = 100 mV

Figure 34. ALS Detect Zone 0

VALS = 500 mV

Figure 35. ALS Detect Zone 1