LM3508TLXSLASHNOPB datasheet(8/20 Pages) TI1

Part #	LM3508TLX/NOPB

Description	Synchronous Magnetic Constant Current White LED Driver

PDF	20 Pages

Scroll/Zoom	100%

Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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8 / 20 page

LM3508

SNVS494C – APRIL 2007 – REVISED MAY 2013

www.ti.com

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

VIN = 3.6V, RSET = 10Ω, L = TDK VLF3012AT-220MR33 (22µH), LEDs are OSRAM (LW M67C), COUT = CIN = 1µF, TA =

+25°C, unless otherwise noted.

Over Voltage Limit vs VIN (VOUT Falling)

Start-Up Waveform

4 LEDs, ILED = 30mA, VIN = 3.6V

Channel 1: VOUT (10V/div)

Channel 2: EN (2V/div)

Channel 4: IIN (200mA/div)

Time Base: 100µs/div

Figure 19.

Figure 20.

Over-Voltage Protection Function

Line-Step Response

VIN = 3.6V, VOUT = 18.86V

VIN = 3.6V, 4 LEDs

Channel 1: VOUT (1V/div)

Channel 1: VOUT (AC Copupled, 1V/div)

Channel 4: IIN (500mA/div)

Channel 3: VIN (AC Coupled, 500mV/div)

Time Base: 400µs/div

Channel 4: ILED (DC Coupled, 5mA/div)

Time Base: 200µs/div

Figure 21.

Figure 22.

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LM3508TLX/NOPB Datasheet(PDF) 8 Page - Texas Instruments