LM3554 datasheet(13/43 Pages) TI1

Nome de Peças	LM3554

Descrição Electrónicos	Synchronous Boost Converter with 1.2A Dual High Side LED Drivers and I2C Compatible

PDF	43 Pages

Scroll/Zoom	100%

Fabricante Electrônico	TI1 [Texas Instruments]

Página de início	http://www.ti.com

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13 / 43 page

LM3554

www.ti.com

SNVS549A – JUNE 2009 – REVISED APRIL 2011

Typical Performance Characteristics (continued)

VIN = 3.6V, LEDs are Lumiled PWF-4, COUT = 10µF, CIN = 4.7µF, L = FDSE0312-2R2 (2.2µH, RL = 0.15Ω), TA = +25°C unless

otherwise specified.

Torch Mode to Flash Mode Transition

TX1 Interrupt Operation, TX1 Rising

Single LED

ITORCH = 295mA, IFLASH = 1.2A

IFLASH = 1.2A, ITORCH = 180mA

Channel 1: VOUT (5V/div)

Channel 1: VOUT (2V/div)

Channel 4: ILED (500mA/div)

Channel 2: IL (1A/div)

Channel 3: STROBE (5V/div)

Channel 3: TX1 (5V/div)

Time Base: (100µs/div)

Time Base: (20µs/div)

TX1 Interrupt Operation, TX1 Falling

Single LED

Line Transient

IFLASH = 1.2A, ITORCH = 180mA

(LED Mode, Single LED, IFLASH = 1.2A)

Channel 1: VOUT (2V/div)

Channel 3: VIN (1V/div)

Channel 4: ILED (500mA/div)

Channel 2: IL (1A/div)

Channel 3: TX1 (5V/div)

Time Base: (400µs/div)

Time Base: (20µs/div)

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