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LX1802 Datasheet

  • LX1802

  • PLUG for MED427A-1

  • 146.99KB

  • 5頁

  • MICROSEMI

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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鈥檚
website:
http://www.microsemi.com
鈥?/div>
鈥?/div>
鈥?/div>
W W W.
Microsemi
.COM
鈥?/div>
APPLICATIONS
Implantable Cardio Defib
BLOCK DIAGRAM
Vhi
in
Peak
Rect
Level
Shifter
Clamp
Switch
IGBT_G
IGBT_E
Simplified Block Diagram
LX1802
LX1802
PACKAGE ORDER INFO
Package Number
T
J
(擄C)
LX1802
10 to 55
Copyright
錚?/div>
2001
Rev. 0.2b, 2002-06-17
Microsemi
Carlsbad Division
5973 Aveniva Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
1

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