LM3813 datasheet(3/14 Pages) NSC

부품명	LM3813

상세설명	Precision Current Gauge IC with Ultra Low Loss Sense Element and PWM Output

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제조업체	NSC [National Semiconductor (TI)]

홈페이지	http://www.national.com

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Absolute Maximum Supply Voltage

5.5V

Power Dissipation

(Note 2)

ESD Susceptibility (Note 3)

1.5 kV

Sense Current (peak, for 200 msec) (Note 4)

10A

Sink Current for PWM pin

1mA

Voltage on Pin 5

5.25V

Maximum Junction Temperature

150˚C

Storage Temperature

−65˚C to +150˚C

Lead Temperature (Soldering, 10 sec)

260˚C

Operating Ratings (Note 1)

Input Voltage

2.0V to 5.25V

Sense Current (continuous) (Note 4)

7A

Junction Temperature Range

−40˚C to +125˚C

Electrical Characteristics

LM3812-1.0, LM3813-1.0

V

DD = 5.0V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is 0.1 µF.

Symbol

Parameter

Conditions

Typ

(Note 5)

Limit

(Note 6)

Units

I

ACC

Average Current Accuracy

(Note 7)

at 0.9A current

0.9

A

0.882 / 0.864

A (min)

0.918 / 0.936

A (max)

e

n

Effective Output Noise (rms)

2

mA

LM3812-7.0, LM3813-7.0

V

DD = 5.0V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is 0.1 µF.

Symbol

Parameter

Conditions

Typ

(Note 5)

Limit

(Note 6)

Units

I

ACC

Average Current Accuracy

(Note 7)

at 2.5A current (Note 8)

2.5

A

2.400 / 2.350

A (min)

2.600 / 2.650

A (max)

e

n

Effective Output Noise (rms)

20

mA

Common Device Parameters

Unless otherwise specified, V

DD = 5.0V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is

0.1 µF.

Symbol

Parameter

Conditions

Typ

(Note 5)

Limit

(Note 6)

Units

I

Q1

Quiescent Current

Normal Mode, SD = high

100

µA

160

µA (max)

I

Q2

Quiescent Current

Shutdown Mode, SD = low

2.5

µA

10

µA (max)

D

RES

PWM Resolution

0.1

%

t

S

Sampling Time

52

ms

40

ms (min)

80

ms (max)

f

P

Frequency of PWM Waveform

20

Hz

12.5

Hz (min)

25

Hz (max)

V

TH

Threshold High Level for SD

1.2

V

1.8

V (min)

V

TL

Threshold Low Level for SD

1.3

V

0.7

V (max)

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