Applications: WEIGHT: grams (typical)

Transcription

1 RADIATION TOLERANT VDC A POWER MOSFET OPTOCOUPLER Mii Features: This Design Tested to krad (Si) Total Dose Hermetically Sealed in Surface Mount Package Low On-resistance A Continuous Output Current Performance over - C to + C Optically Coupled Input/Output Isolation Tested to VDC Shock and Vibration Resistant Applications: Satellite/Space Systems Military/High Reliability Systems Power Distribution/Switching Solenoid Driver Stepper Motor Driver Switching Heaters DESCRIPTION The is a radiation tolerant Power MOSFET Optocoupler designed for military and space applications. This light-weight device is resistant to damage from severe shock and vibration, and is immune to contact related problems inherent in electro-mechanical relays. The device is enclosed in a hermetic metal package to ensure reliability in harsh environments. Effective isolation of VDC between control and load circuits is achieved through the use of optical coupling. Functionally, the device operates as a single-pole single-throw, normally open ( Form A) DC solid-state relay. The SSR is actuated by an input current of to ma, which can be supplied from standard logic types such as opencollector TTL. Output is provided by a power MOSFET exhibiting very low R DS(ON) and capable of carrying a continuous current of amperes. This design has demonstrated it will function with minimal degradation after exposure to krad (Si) total dose. This device is available in a variety of quality levels from COTS to class K including any custom screening requirements. The basic data sheet part is environmentally screened to H level in accordance with Table C-IX of MIL-PRF-8. RADIATION TOLERANT This device contains radiation hardened components and/or other features that provide a level of radiation tolerance. Micropac does not guarantee any level of radiation hardness. Specific lot testing is required to determine the level of radiation hardness. Micropac does not offer this device as compliant to Appendix G (RHA Requirements) of MIL-PRF-8. ABSOLUTE MAXIMUM RATINGS Output Voltage... VDC Continuous Output current... A Peak Output Current ()... A Storage Temperature Range...-6ºC to +ºC Operating Junction Temperature... -ºC to +ºC Lead Solder Temperature for seconds...ºc Continuous Input Current... ma Peak Input Current ()... ma Reverse Input Voltage... 6 VDC Power Dissipation ()... W Linear Derating Factor.... W/ C WEIGHT:... grams (typical) Pg. of 7

2 Radiation Tolerant VDC A Power MOSFET Optocoupler RECOMMENDED OPERATING CONDITIONS: Parameter Symbol Min. Max. Units Output Voltage V O (OFF) VDC Continuous Output Current I O (ON) A Input Current (on) I F (ON) ma Input Voltage (off) V F (OFF) VDC Operating Case Temperature T C - C ELECTRICAL SPECIFICATIONS (Pre-Irradiation) T C = - C to + C unless otherwise specified Parameter Sym. Min. Typ.* Max. Units Test Conditions Notes Output On-Resistance R (ON)..6 Ω Output Leakage Current I O (OFF) < µa I F = ma I O = A Pulse width = ms Duty cycle % V F = VDC V O = VDC Input Forward Voltage V F..7. VDC I F = ma Input Reverse Breakdown Voltage V R 6 VDC I R = µa Input-Output Leakage I I-O µa Turn-On Time t ON. 8. ms Turn-Off time t OFF. ms Rise Time t R. 6. ms Fall Time t F.9. ms RH %, t = s V I-O = VDC T C = C I F = ma I O = A Pulse width = ms, Figures, Figures, Duty cycle % 6, Figure Thermal Resistance (junction-case) θ JC C/W Output Off-Capacitance C O (OFF).8 nf Input Capacitance C IN 7 pf Input-Output Capacitance C I-O.6 pf * All typical values are at T C = C V O = 8 VDC f = MHz V F = V f = MHz V I-O = V f = MHz Pg. of 7

3 Radiation Tolerant VDC - A Power MOSFET Optocoupler Notes:. Non-repetitive, pulse width ms, T C = C (see Figure 6).. Non-repetitive, pulse width µs, T C = C.. Case Temperature T C = C (see Figure 7).. Input pins shorted together and output pins shorted together.. Input-output potential applied momentarily, not an operating condition. 6. Rise time is measured from % to 9% of load current (9% to % of V O ). Fall time is measured from 9% to % of load current (% to 9% of V O ). CAUTION: Care should be taken so as not to exceed the maximum power dissipation and maximum junction temperature when repetitively switching loads. INPUT ON OFF OUTPUT ON OFF Figure. Truth Table Figure. Terminal Connections +V C +DC SUPPLY R S R LOAD -VC TOP VIEW OUTPUT GND Figure. Terminal Connections Pg. of 7

4 Radiation Tolerant VDC - A Power MOSFET Optocoupler Z O = t R = t F = ns PULSE GENERATOR V LOAD = V R L = V O MONITOR C L = pf (INCLUDES PROBE AND FIXTURE CAPACITANCE) I F MONITOR (mv/ma) % % I F V O 9% % t ON toff Figure. Switching Waveforms and Test Circuits Turn-on Time (ms) ma ma ma Turn-off Time (ms) Figure. Turn-on Time vs. Case Temperature for Different Values of I F (typical data). Figure. Turn-off Time vs. Case Temperature with I F = to ma (typical data). Pg. of 7

5 Radiation Tolerant VDC - A Power MOSFET Optocoupler Maximum Peak Output Current (A) Maximum Average Power Dissipation (W) Figure 6. Maximum Non-repetitive Output Current vs. Case Temperature (pulse width ms). Figure 7. Maximum Average Output Power Dissipation vs. Case Temperature. TOTAL DOSE TEST RESULTS Disclaimer: The data of representative units irradiated in Cobalt-6 chamber is only typical of one lot of solid state relays. Micropac does not guarantee performance of its SSR to these radiation levels. Individual lots have to be screened to guarantee the performance. Turn-On Time, ms Rise Time, ms Figure 8. Turn-On Time vs Total Dose Figure 9. Rise Time vs Total Dose at V out = V, R load = Ω, at V out = V, R load = Ω, I in = ma, % duty cycle. I in = ma, % duty cycle. Pg. of 7

6 Radiation Tolerant VDC - A Power MOSFET Optocoupler.. Turn-Off Time, ms. Fall Time, ms... Figure. Turn-Off Time vs Total Dose Figure. Fall Time vs Total Dose at V out = V, R load = Ω, at V out = V, R load = Ω, I in = ma, % duty cycle. I in = ma, % duty cycle.. 8 On-Resistance, ohm.. Output Leakage Current, na 6 Figure. On-Resistance vs Total Dose Figure. Output Leakage Current vs Total Dose at I F = ma, I out = ma for s. at V F = V, V out = V. Pg. 6 of 7

7 Radiation Tolerant VDC - A Power MOSFET Optocoupler Input Forward Voltage, VDC Input Reverse Voltage, VDC 8 6 Figure. Input Forward Voltage vs Total Dose at I F = ma. Figure. Input Reverse Voltage vs Total Dose at I R = µa..7 CASE OUTLINE ±...8 Ø.8 (X).. MAX. ±. DIA ( PLCS).9 REF.6 ±. Pg. 7 of 7