LM3501 datasheet(13/26 Pages) TI1

Part #	LM3501

Description	Synchronous Step-up DC/DC Converter for White LED Applications

PDF	26 Pages

Scroll/Zoom	100%

Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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13 / 26 page

LM3501

www.ti.com

SNVS230B – MAY 2004 – REVISED MAY 2005

Typical Performance Characteristics (continued)

Start-Up (LM3501-16)

SHDN Pin Duty Cycle Control Waveforms

3 LEDs, RLED = 22Ω, VIN = 3.0V, CNTRL = 2.7V

LM3501-16, 3 LEDs, RLED = 22Ω, VIN = 3.0V, SHDN frequency = 200

1) SHDN, 1 V/div, DC

2) IL, 100 mA/div, DC

3) ILED, 20 mA/div, DC

T = 100 µs/div

4) VOUT, 10 V/div, DC

T = 1 ms/div

Typical VOUT Ripple, OVP Functioning (LM3501-16)

Typical VOUT Ripple, OVP Functioning (LM3501-21)

VOUT open circuit and equals approximately 15V DC, VIN = 3.0V

VOUT open circuit and equals approximately 20V DC, VIN = 3.0V

3) VOUT, 200 mV/div, AC

1) VOUT, 200 mV/div, AC

T = 1 ms/div

T = 400 µs/div

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LM3501 Datasheet(PDF) 13 Page - Texas Instruments