LM3554 datasheet(12/43 Pages) TI1

Part #	LM3554

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

PDF	43 Pages

Scroll/Zoom	100%

Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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12 / 43 page

LM3554

SNVS549A – JUNE 2009 – REVISED APRIL 2011

www.ti.com

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.

Indicator Current

VIN, VLEDI = 2V

(Torch Brightness Register bits[7:6] = 01)

(Torch Brightness Register bits[7:6] = 10)

Indicator Current

NTC Comparator Trip Threshold

VIN, VLEDI = 2V

(Torch Brightness Register bits[7:6] = 11)

VIN

Startup into Flash Mode

Startup into Torch Mode

Single LED

Single LED, Hardware Torch Mode, 90mA Torch Setting

IFLASH = 1.2A

ITORCH = 180mA

Channel 1: VOUT (2V/div)

Channel 4: ILED (500mA/div)

Channel 4: ILED (100mA/div)

Channel 2: IL (500mA/div)

Channel 3: STROBE (5V/div)

Channel 3: TX1 (5V/div)

Time Base: (100µs/div)

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LM3554 Datasheet(PDF) 12 Page - Texas Instruments