Datasheet LM3812M-7.0/NOPB - National Semiconductor IC, PWM CONTROLLER — Datenblatt

Detaillierte Beschreibung

Manufacturer: National Semiconductor

Description: IC, PWM CONTROLLER

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Docket:
LM3812/LM3813 Precision Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
February 2005
LM3812/LM3813 Precision Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
General Description
The LM3812/LM3813 Current Gauges provide easy to use precision current measurement with virtually zero insertion loss (typically 0.004).

The LM3812 is used for high-side sensing and the LM3813 is used for low-side sensing. A Delta Sigma analog to digital converter is incorporated to precisely measure the current and to provide a current averaging function. Current is averaged over 50 msec time periods in order to provide immunity to current spikes. The ICs have a pulse-width modulated (PWM) output which indicates the current magnitude and direction. The shutdown pin can be used to inhibit false triggering during start-up, or to enter a low quiescent current mode. The LM3812 and LM3813 are factory-set in two different current options. The sense range is -1A to +1A or -7A to

Specifications:

• Base Number: 3812
• Input Voltage Max: 5.25 V
• Input Voltage: 5 V
• Interface: Serial, SPI
• Mounting Type: SMD
• Number of Pins: 8
• Operating Temperature Range: -40°C to +125°C
• Output Current: 1 mA
• Package / Case: SOIC
• Supply Voltage Range: 2 V to 5.25 V
• RoHS: Yes
• SVHC: No SVHC (19-Dec-2011)

Andere Namen:

LM3812M7.0/NOPB, LM3812M 7.0/NOPB