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LX1802

Microsemi Corporation
Part Number LX1802
Manufacturer Microsemi Corporation
Description PLUG for MED427A-1
Published Mar 30, 2005
Detailed Description LX1802 "PLUG" for MED427A-1 CARLSBAD DIVISION TARGET DATASHEET DESCRIPTION KEY FEATURES Low peak current consumption: <...
Datasheet PDF File LX1802 PDF File

LX1802
LX1802

Overview
LX1802 "PLUG" for MED427A-1 CARLSBAD DIVISION TARGET DATASHEET DESCRIPTION KEY FEATURES Low peak current consumption: <2mA 2 Small form factor 0.
889 mm Solder bumped die The MSC-LX1802 is the IC2 "Plug" for the MED427A-1 module.
The "Plug" chip has peak rectifier, level shifter, and switch.
This full wave peak rectifier converts the peak to peak AC input waveform to a DC level.
The charge builds up on both terminals of the storage capacitor to step up the DC level during a full wave input signal.
The charge dissipates via a resistor when the AC input signal stops.
The level shifter is a source follower transistor with a resistive load.
The input connects to the peak rectifier output and the output connects to IGBT_G.
If the input voltage is below threshold, the output (IGBT_G) equals IGBT_E voltage.
If the input voltage exceeds the threshold voltage of the transistor, the output steps up to the bootstrap voltage Vhi+IGBT_E at the IGBT_G output.
The switch supplements the discharge of the capacitor in the peak rectifier when the AC input signal stops.
The switch remains open when there is an AC signal since a virtual ground forms at its input and prevents a channel from forming in the active device.
The opposite occurs when the AC signal stops and the input builds a potential greater than a threshold voltage.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.
microsemi.
com • • • W W W.
Microsemi .
COM • APPLICATIONS Implantable Cardio Defib BLOCK DIAGRAM Vhi in Peak Rect Level Shifter Clamp Switch IGBT_G IGBT_E Simplified Block Diagram LX1802 TJ (°C) 10 to 55 PACKAGE ORDER INFO Package Number LX1802 Copyright  2001 Rev.
0.
2b, 2002-06-17 Microsemi Carlsbad Division 5973 Aveniva Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541 1 LX1802 "PLUG" for MED427A-1 CARLSBAD DIVISION TARGET DATASHEET ABSOLUTE MAXIMUM RATINGS Voltage potential.
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