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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
•
APPLICATIONS
Implantable Cardio Defib
•
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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
BLOCK DIAGRAM
Vhi
in
Peak
Rect
Level
Shifter
Clamp
Switch
IGBT_G
IGBT_E
Simplified Block Diagram
Copyright  2001
Rev. 0.2b, 2002-06-17
PACKAGE ORDER INFO
Package Number
LX1802
Microsemi
Carlsbad Division
5973 Aveniva Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
LX1802
TJ (°C)
10 to 55
1
LX1802
"PLUG" for MED427A-1
CARLSBAD DIVISION
TARGET DATASHEET
PACKAGE PIN OUT
13
4
11
6
(Bottom View)
Note:
Exceeding these ratings could cause damage to the device. All voltages are with respect to
Ground. Currents are positive into, negative out of specified terminal.
5
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ABSOLUTE MAXIMUM RATINGS
Voltage potential......................................................................................... 0.0V to +20.0V
ESD Voltage ................................................................................................................. 2kV
Storage Temperature Range(TSTOR)................................................................10°C to 55°C
Storage humidity...............................................................................................10% to 90%
FUNCTIONAL PIN DESCRIPTION
PIN NAME
PIN NO
16 PIN DIP
DESCRIPTION
IGBT_G
5
Connects to IGBT gate
IGBT_E
6
Connects to IGBT emitter
IN
11
Input AC signal
VDDHI
13
High voltage supply
EXTERNAL COMPONENTS
Symbol
Value
Tolerance
Function
PACKAGE DATA
Copyright  2001
Rev. 0.2b, 2002-06-17
Microsemi
Carlsbad Division
5973 Aveniva Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
2
LX1802
"PLUG" for MED427A-1
CARLSBAD DIVISION
TARGET DATASHEET
OPERATING CONDITIONS
Parameter
Symbol
Vp
f
TAMB
Min
15
5
31
Typ
16
7.5
37
Max
Unit
18
10
43
Volt
MHz
°C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature TA=37°C except where otherwise
noted. Test conditions: VHI=16V, IGBT_E=800V, fin=10MHz, IGBT_G load=3nF.
Parameter
Symbol
Voltage drop limit for IGBT_G
Vdrop
Rise time for IGBT_G
trise,G
Fall time for IGBT_G
Enable time for IGBT_G
tfall,G
ten,G
Disable time for IGBT_G
tdis,G
Test Conditions
-5MHz 0-6V 50% @ pin in
- Vdrop=18V-IGBT_G(pk)
-5MHz 0-6V 50% @ pin in
-10%-90%*IGBT_G(pk)
-90%-10%*IGBT_G(pk)
-Measure enable of 5MHz 0-18V 50% @
pin in to IGBT_G=90%*IGBT_G(pk)
-Measure disable of 5MHz 0-18V 50% @
pin in to IGBT_G=10%*IGBT_G(pk)
Min
LX1801
Typ
Max
Units
1
V
5
us
5
5
us
us
5
us
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Voltage potential
Input frequency
Operating temp
ELECTRICALS
Copyright  2001
Rev. 0.2b, 2002-06-17
Microsemi
Carlsbad Division
5973 Aveniva Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
3
LX1802
"PLUG" for MED427A-1
CARLSBAD DIVISION
TARGET DATASHEET
MECHANICALS
Dim
X
Y
(22, 406)
(930, 400)
MILLIMETERS
MIN
MAX
1.40
0.635
INCHES
MIN
MAX
0.055
0.025
(1208, 400)
Note:
(19, 20)
(1204, 22)
1. Dimensions do not include mold flash or
protrusions;
these
shall
not
exceed
0.155mm(.006”) on any side. Lead dimension
shall not include solder coverage.
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4-Pin Bare Die
(0,0)
Pad Locations are (Xmin, Ymin) and are in um
MECHANICALS
Copyright  2001
Rev. 0.2b, 2002-06-17
Microsemi
Carlsbad Division
5973 Aveniva Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
4