LM2731XMF_NOPB datasheet(14/16 Pages) TI1

номер детали	LM2731XMF_NOPB

подробное описание детали	LM2731 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23

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VIN (V)

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V

OUT = 5V

V

OUT = 8V

V

OUT = 10V

V

OUT = 12V

VIN (V)

0

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V

OUT = 5V

V

OUT = 8V

V

OUT = 10V

V

OUT = 12V

V

OUT = 18V

ILOAD(max) = (1 - DC) x (ISW(max) - DC (VIN - VSW))

2fL

TI Confidential - NDA Restrictions

LM2731

SNVS217F – MAY 2004 – REVISED NOVEMBER 2012

www.ti.com

CALCULATING LOAD CURRENT

As shown in the figure which depicts inductor current, the load current is related to the average inductor current

by the relation:

ILOAD = IIND(AVG) x (1 - DC)

(7)

Where "DC" is the duty cycle of the application. The switch current can be found by:

ISW = IIND(AVG) + ½ (IRIPPLE)

(8)

Inductor ripple current is dependent on inductance, duty cycle, input voltage and frequency:

IRIPPLE = DC x (VIN-VSW) / (f x L)

(9)

combining all terms, we can develop an expression which allows the maximum available load current to be

calculated:

(10)

The equation shown to calculate maximum load current takes into account the losses in the inductor or turn-OFF

switching losses of the FET and diode. For actual load current in typical applications, we took bench data for

various input and output voltages for both the "X" and "Y" versions of the LM2731 and displayed the maximum

load current available for a typical device in graph form:

Figure 33. Max. Load Current (typ) vs VIN - "X"

Figure 34. Max. Load Current (typ) vs VIN - "Y"

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Аналогичный номер детали - LM2731XMF_NOPB

производитель	номер детали	датащи	подробное описание детали
Texas Instruments	LM2731XMF/NOPB	1Mb / 29P	[Old version datasheet] 0.6/1.6-MHz Boost Converters With 22-V Internal FET Switch in SOT-23

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Аналогичное описание - LM2731XMF_NOPB

производитель	номер детали	датащи	подробное описание детали
Texas Instruments	LM2731YMFX	629Kb / 16P	[Old version datasheet] LM2731 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23
Texas Instruments	LM2731	1Mb / 22P	[Old version datasheet] 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23
National Semiconductor ...	LM2731	528Kb / 16P	0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23
	LM2731	432Kb / 16P	0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23
	LM2733	406Kb / 16P	0.6/1.6 MHz Boost Converters With 40V Internal FET Switch in SOT-23
Texas Instruments	LM2731	1Mb / 29P	[Old version datasheet] 0.6/1.6-MHz Boost Converters With 22-V Internal FET Switch in SOT-23
	LM2733YMF-NOPB	1Mb / 22P	[Old version datasheet] LM2733 0.6/1.6 MHz Boost Converters With 40V Internal FET Switch in SOT-23
	LM2733	1Mb / 26P	[Old version datasheet] 0.6 and 1.6-MHz Boost Converters With 40-V Internal FET Switch in SOT-23
National Semiconductor ...	LM27313	337Kb / 12P	1.6 MHz Boost Converter With 30V Internal FET Switch in SOT-23
National Semiconductor ...	LM2733	507Kb / 13P	0.6/1.6 MHz Boost Converters With 40V Internal FET

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LM2731XMF_NOPB датащи(PDF) 14 Page - Texas Instruments

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Аналогичный номер детали - LM2731XMF_NOPB

Аналогичное описание - LM2731XMF_NOPB

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