LM3552 datasheet(6/23 Pages) TI1

部件名	LM3552

功能描述	1A White LED Driver with Flash Timeout Protection

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制造商	TI1 [Texas Instruments]

网页	http://www.ti.com

标志

6 / 23 page

LM3551, LM3552

SNVS371D – AUGUST 2005 – REVISED MAY 2013

www.ti.com

Typical Performance Characteristics (continued)

Unless otherwise specified: TA = +25°C; VIN = 3.6V; L = 4.7µH, (RC = 10kΩ, CC = 4.7nF, CIN = COUT = 10µF for Lumiled LED),

(RC = 27kΩ, CC = 10nF, CIN = 10µF, COUT = 4.7µF for Sharp LED), CFTO = 1µF, CSS= 0.1µF.

LED Torch Current

LED Flash Current

vs.

Input Voltage

Lumiled Flash LED

Figure 8.

Figure 9.

OVP Trip Voltage

Switching Frequency

vs.

Input Voltage

Figure 10.

Figure 11.

Start-Up Waveform

Sharp LED

Lumiled LED

Figure 12. Ch1 = VSD, Ch3 = ILED, Ch4 = IIN

Figure 13. Ch1 = VSD, Ch3 = ILED, Ch4 = IIN

6

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