Rainbow-electronics LM3813 Manuel d'utilisateur télécharger pdf (Page 3)

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

= 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

ACC

Average Current Accuracy

(Note 7)

at 0.9A current 0.9

0.882 / 0.864 A (min)

0.918 / 0.936 A (max)

Effective Output Noise (rms) 2 mA

LM3812-7.0, LM3813-7.0

= 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

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)

Effective Output Noise (rms) 20 mA

Common Device Parameters

Unless otherwise specified, V

= 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

Quiescent Current Normal Mode, SD = high 100 µA

160 µA (max)

Quiescent Current Shutdown Mode, SD = low 2.5 µA

10 µA (max)

RES

PWM Resolution 0.1 %

Sampling Time 52 ms

40 ms (min)

80 ms (max)

Frequency of PWM Waveform 20 Hz

12.5 Hz (min)

25 Hz (max)

Threshold High Level for SD 1.2 V

1.8 V (min)

Threshold Low Level for SD 1.3 V

0.7 V (max)

LM3812/LM3813

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Rainbow-electronics LM3813 Manuel d'utilisateur Page 3

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