Microsemi Corporation MM158 Datasheet
2830 S. Fairview St.
Santa Ana, CA 92704
PH: (714) 979-8220
FAX: (714) 966-5256
PRELIMINARY
Features
• Designed for use with NiH battery cells on spacecraft
• Thermally activated non-dissipative permanent battery bypass
• Charge/discharge diodes are replaced by a permanent
low resistance short to bypass cell after open failure
• Compact, rugged construction offers weight and cost savings
• Can modify leads, available in different lengths
• Radiation tolerant to 300 Mrad total dose
• Discrete diodes screened and qualified per Microsemi PS11.50
• Multiple shorting points for redundant short activation
Maximum Ratings @ 25°C (unless otherwise specified)
PART NUMBER SYMBOL MAX. UNIT
MM158
DISCHARGE: 200 A
CHARGE: 50 A
SHORT: 400A
BATTERY CELL
BYPASS/SHORTING
MODULE
Discharge Current ID 200 Amps
Charge Current IC 50 Amps
Non-Rep Peak Surge Current (discharge) IDSM 1000 Amps
Non-Repetitive Peak Surge Current (charge) ICSM 350 Amps
Operating and Storage Junction Temperature Range Tj
Tstg
Thermal resistance, junction to lead, discharge,
measured at lead adjacent to cover
Thermal resistance, junction to lead, charge,
measured at lead adjacent to cover
RΘjLD
RΘjLC
-55 to +175
0.5
1.0
°C
°C/W
°C/W
Mechanical Outline
Datasheet# MSC0945.PDF
MM158
MSC0945.PDF
Electrical Parameters, DISCHARGE circuit @ 25°C (unless otherwise specified)
PRELIMINARY
DESCRIPTION SYMBOL CONDITIONS MIN TYP. MAX UNIT
Forward Voltage, note 1 VD1 IF= 10 A 780 830 mV
Forward Voltage, note 1 VD2 IF= 50 A 845 900 mV
Forward Voltage, note 1 VD3 IF= 100 A 875 940 mV
Forward Voltage, note 1 VD4 IF= 200 A 905 975 mV
Forward Voltage, note 1 VD5 IF= 400 A 1100 mV
Forward Voltage, note 1 VD6
Forward Voltage, note 1 VD7
note: see MSARS200S200L data sheet for individual characteristics
IF= 200 A, TA= -55°C
IF= 200 A, TA= 125°C
Electrical Parameters, CHARGE circuit @ 25°C (unless otherwise specified)
DESCRIPTION SYMBOL CONDITIONS MIN TYP. MAX UNIT
Forward Voltage, note 1 VC1 IF= 10 mA - 1.72 - V
Forward Voltage, note 1 VC2 IF= 50 mA - 1.9 - V
Forward Voltage, note 1 VC3 IF= 100 mA 1.85 2.0 2.1 V
Forward Voltage, note 1 VC4 IF= 500 mA - 2.15 - V
Forward Voltage, note 1 VC5 IF= 5 A 2.43 2.52 V
Forward Voltage, note 1 VC6 IF= 10 A 2.5 2.65 V
Forward Voltage, note 1 VC7 IF= 25 A 2.6 2.8 V
Forward Voltage, note 1 VC8 IF= 50 A 2.75 2.95 V
Forward Voltage, note 1 VC9
Forward Voltage, note 1 VC10
IF= 25 A, TA= -55°C
IF= 25 A, TA= 125°C
985 1070 mV
790 865 mV
2.9 - V
2.3 V
note: see MSARS50S20Y data sheet for individual characteristics
Electrical Parameters, after cell fails open @ full temperature range
DESCRIPTION SYMBOL CONDITIONS MIN TYP. MAX UNIT
Shorted Current Ishort t=dc 400 A
Shorted Current (pulse) IPshort t=300ms 1000 A
Resistance Rshort End to end of leads 250 300
Shorted Cycling Cshort Discharge=250A
Charge=50A
t=2 hrs min
Shorting Time tshort at full load TBD secs
Notes
(1) Pulse test, t ≤ 300 µs, duty cycle δ ≤ 2%
50,000 cycles
uΩ
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