LM3550 datasheet(11/37 Pages) TI1

Il numero della parte	LM3550

Spiegazioni elettronici	5A Flash LED Driver with Automatic VLED and ESR Detection for Mobile Camera Systems

PDF	37 Pages

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Produttore elettronici	TI1 [Texas Instruments]

Homepage	http://www.ti.com

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IFlash

(0A to 3A)

TIME (1 Ps/div.)

VSTROBE

(2V/div.)

IFlash = 3A

TIME (20 ms/div.)

VCAP

2V/div.

ICharge

(500 mA/div.)

IIN

(500 mA/div.)

STROBE

EOCB

IFlash

(0A to 3A)

VCAP

(2V/div.)

ICharge

(200mA/div.)

TIME (20 ms/div.)

IIN

(200mA/div.)

IFlash

(0A to 3A)

VCAP

(2V/div.)

ICharge

(200mA/div.)

TIME (200 ms/div.)

IIN

(200mA/div.)

EOCB

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

VIN

(2V/div.)

VCAP

(2V/div.)

ICharge

(200 mA/div.)

TIME (1s/div.)

EOCB

IIN

(200 mA/div.)

LM3550

www.ti.com

SNVS569B – MAY 2009 – REVISED MAY 2013

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,

Indicator Current

vs.

Input Voltage

Tri-Temp

5.3V Mode Super Capacitor Charge

Figure 33.

Figure 34.

2 LED, 3A Flash

(1.5A each)

5.3V Mode Super Capacitor Recharge

Figure 35.

Figure 36.

Strobe to Flash Delay

Edge-Sensitive Strobe

Figure 37.

Figure 38.

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