2830 S. Fairview St. Santa Ana, CA 92704 PH: (714) 979-8220 FAX: (714) 966-5256 Features MM158 PRELIMINARY • 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 DISCHARGE: 200 A CHARGE: 50 A SHORT: 400A BATTERY CELL BYPASS/SHORTING MODULE Maximum Ratings @ 25°C (unless otherwise specified) PART NUMBER Discharge Current Charge Current Non-Rep Peak Surge Current (discharge) Non-Repetitive Peak Surge Current (charge) Operating and Storage Junction Temperature Range Thermal resistance, junction to lead, discharge, measured at lead adjacent to cover Thermal resistance, junction to lead, charge, measured at lead adjacent to cover SYMBOL MAX. UNIT ID IC IDSM ICSM Tj Tstg RΘ jLD 200 50 1000 350 -55 to +175 Amps Amps Amps Amps °C 0.5 °C/W RΘ jLC 1.0 °C/W Mechanical Outline Datasheet# MSC0945.PDF MM158 MSC0945.PDF PRELIMINARY Electrical Parameters, DISCHARGE circuit @ 25°C (unless otherwise specified) DESCRIPTION Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 SYMBOL VD1 VD2 VD3 VD4 VD5 VD6 VD7 CONDITIONS IF= 10 A IF= 50 A IF= 100 A IF= 200 A IF= 400 A IF= 200 A, TA= -55°C IF= 200 A, TA= 125°C MIN TYP. 780 845 875 905 1100 985 790 MAX 830 900 940 975 1070 865 UNIT mV mV mV mV mV mV mV note: see MSARS200S200L data sheet for individual characteristics Electrical Parameters, CHARGE circuit @ 25°C (unless otherwise specified) DESCRIPTION Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 Forward Voltage, note 1 SYMBOL VC1 VC2 VC3 VC4 VC5 VC6 VC7 VC8 VC9 VC10 CONDITIONS IF= 10 mA IF= 50 mA IF= 100 mA IF= 500 mA IF= 5 A IF= 10 A IF= 25 A IF= 50 A IF= 25 A, TA= -55°C IF= 25 A, TA= 125°C MIN TYP. MAX UNIT 1.85 - 1.72 1.9 2.0 2.15 2.43 2.5 2.6 2.75 2.9 2.3 2.1 2.52 2.65 2.8 2.95 - V V V V V V V V V V note: see MSARS50S20Y data sheet for individual characteristics Electrical Parameters, after cell fails open @ full temperature range DESCRIPTION SYMBOL Shorted Current Shorted Current (pulse) Resistance Shorted Cycling Ishort IPshort Rshort Cshort Shorting Time Notes (1) Pulse test, t ≤ 300 µs, duty cycle δ≤ 2% tshort CONDITIONS t=dc t=300ms End to end of leads Discharge=250A Charge=50A t=2 hrs min at full load MIN TYP. MAX 400 1000 250 300 50,000 TBD UNIT A A uΩ cycles secs