LM2754 datasheet(8/19 Pages) TI1

Part #	LM2754

Description	LM2754 800mA Switched Capacitor Flash LED Driver with Time-Out Protection

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Manufacturer	TI1 [Texas Instruments]

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LM2754

SNVS463A – SEPTEMBER 2006 – REVISED MAY 2013

www.ti.com

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

Unless otherwise specified: TA = 25°C, VDx = 1V, V(IN, INSW) = 3.6V, VEN = VIN, VT/F = VTX = VSEL = 0V, CIN = C1 = C2 = 2.2µF,

COUT = 4.7µF. Capacitors are low-ESR multi-layer ceramic capacitors (MLCC's).

Battery Ripple, Gain = 1.5x

Battery Ripple, Gain = 2x

VIN = Li-Ion Battery at 3.7V, Load = 400mA, LED = PWF1;

VIN = Li-Ion Battery at 3.7V, Load = 400mA; LED = PWF1;

CH1 (MID-TOP): VOUT; Scale: 20mV/Div, AC Coupled;

CH2 (MID-BOTTOM): VIN; Scale: 50mV/Div, AC Coupled;

CH3 (TOP): VIN; Scale: 1V/Div, DC Coupled;

CH4 (BOTTOM): IIN; Scale: 500mA/Div;

CH4 (BOTTOM): IIN; Scale: 500mA/Div; Time scale: 1µs/Div

Time scale: 1µs/Div

Figure 11.

Figure 12.

Startup and Shutdown Response

Torch Mode (400mA)

VIN = 3.6V, Load = 400mA, LED = PWF1;

CH1 (TOP): VOUT; Scale: 1V/Div, DC Coupled;

CH4 (MIDDLE): IIN; Scale: 200mA/Div

CH3 (BOTTOM): IOUT; Scale: 200mA/Div ;

Time scale: 100ms/Div

Figure 13.

8

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