Power Matters™

Rad-Tolerant PWM Controllers

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Microsemi is the inventor of PWM controllers, in the market since 1975 with the SG1524. Microsemi's radiation hardened PWM controller family for isolated applications includes products fit for Military-space applications.

Microsemi’s Space/Military radiation hardened PWM controllers operate from -55 to +125oC and are available in the following package options:
F: Flatpack, 20-pin,Ceramic
J: DIP, 16/18-pin, Ceramic
L: LCC, 20-pin, Ceramic
Y: DIP, 8-pin, Ceramic

The -883B, -DESC and -JAN suffixes indicate compliance with the 883B, DESC and JAN military/space standards respectively.

P/N Radiation Tolerance Mode Topologies Vsup
(V)
Vref
Acc.
(%)
Duty 
Cyc.
(%)
Gate
Driv
(mA)
Vsen
(V)
Iq
(mA)
Soft
Start
UVLO
(V)
UVLO
Hyst
(V)
Istart
max
(mA)
Int.
Freq.
(kHz)
Ext.
Sync
(kHz)
 SGR1845 100kRad  Curr.  Flyback
Forward
Buck
Push-Pull 
17-30  0-48  200  17 Yes  8.4   0.8 0.1-500  0.1-500 
SGR1846 100kRad Curr. Flyback
Forward
Buck
Push-Pull
8-
40
1 0-
48
200 0.5 21 Yes 7.7 0.75 1-
500
1-
500