LM3814M-1.0 datasheet(8/14 Pages) NSC

Teilenummer	LM3814M-1.0

Bauteilbeschribung	Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output

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Hersteller	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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Typical Application Circuits In the application circuits, the 0.1µF ceramic capacitor between pins 1 and 8

is used for bypassing, and the 0.1µF ceramic capacitor between pins 3 and 4 is used for filtering. Shutdown (SD) is tied to

VDD through a 10k

Ω resistor. (Continued)

DS101013-7

FIGURE 3. Paralleling LM3814 for Higher Load Current

I

TOTAL = 2.2(D1−0.5)IMAX + 2.2(D2−0.5)IMAX

where D

1 is the duty cycle of PWM1 and D2 is the duty cycle of PWM2.

Please refer to the Product Operation section for more information.

DS101013-8

FIGURE 4. High Voltage Operation — V

IN Greater Than 5.25V (High Side Sense)

(PWM output is referred to Pin 7)

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