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SENSITRON SEMICONDUCTOR
TECHNICAL DATA DATASHEET 4310, Rev B
SPDXXD28 SERIES
DC Solid State Power Controller Module
Description:
The Solid State Power Controller (SSPC) Module is a microcontroller-based Solid State Relay rated upto 25A designed to be used in Army, Air force and Navy in 28V DC applications. This module has integrated current sensing with no derating over the full operating temperature range. The module is the electronic equivalent to an electromechanical circuit breaker with isolated control and status. This series is supplied in 3 product families covering 9 current ranges: SPD5D28 Family: - SPD5D28-1: 1A - SPD5D28-3: 3A - SPD5D28-5: 5A SPD15D28 Family: - SPD14D28-7: 7A - SPD14D28-10: 10A - SPD14D28-14: 14A SPD25D28 Family: - SPD25D28-15: 15A - SPD25D28-20: 20A - SPD25D28-25: 25A
Compliant Documents & Standards:
MIL-STD-1275B, Notice1 MIL-STD-704F MIL-STD-217F, Notice 2 Characteristics of 28 Volt DC Electrical Systems in Military Vehicles-4/20/04 Aircraft Electrical Power Characteristics 12 March 2004 Reliability Prediction of Electronic Equipment 28 Feb 1995
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Module Features:
Epoxy Shell Construction Solid State Reliability; Low Weight (20 gms) - High Power Density Same Pin Out as Industry Standard SSPCs in a Smaller Outline Extremely Low Power, No Derating Over the Full Temperature Range 28VDC Input with Very Low Voltage Drop; 60mV, typ. @15A True I2t Protection from 32A to 250A with Nuisance Trip Suppression Instant Trip Protection (50 µsec typ) for Loads Above 250A Unlimited Interrupt Capability; Repetitive Fault Handling Capability Thermal Memory Internally Generated Isolated Supply to Drive the Switch Low Bias Supply Current: 20 mA typ @ 5V DC High Control Circuit Isolation: 750V DC Control to Power Circuit Soft Turn-On to Reduce EMC Issues EMI Tolerant Module Reset with a Low Level Signal; Reset Circuit is Trip-Free TTL/CMOS Compatible, Optically Isolated, Input and Outputs Schmitt-Trigger Control Input for Noise Immunity
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Electrical Features (SPDXXD28 Series):
• 221 West Industry Court Deer Park, NY 11729-4681 Phone (631) 586 7600 Fax (631) 242 9798 • • World Wide Web - http://www.sensitron.com • E-Mail Address - sales@sensitron.com •
SENSITRON SEMICONDUCTOR
TECHNICAL DATA DATASHEET 4310, Rev B
SPDXXD28 SERIES
Table 1 - Electrical Characteristics (at 25 oC and Vbias = 5.0V DC unless otherwise specified)
Control & Status (TTL/CMOS Compatible)
BIAS (Vcc) BIAS (Vcc) Current GATE Status, Load Status Signals CONTROL Signal VT+ (Positive-going input threshold voltage) VT− (Negative-going input threshold voltage) ∆VT Hysteresis (VT+ VT−) Reset 5.0V DC Nominal, 6.5V DC Absolute Maximum 4.5V to 5.5 VDC 20 mA typ 25 mA, max Voh=3.7V, min, at Ioh=-20mA Vol=0.4V, max, at Iol=20mA 2.0V, min, 3.5V, max 1.2V, min, 2.3V, max 0.6V, min, 1.4V, max Cycle CONTROL Signal 0 to 40V DC, 50V DC Absolute Maximum +600V or –600V Spike (< 10 uS) See Table 4 See Table 4 See Trip Curve See Table 4 110% min See Trip Curve 110 µsec typ 110 usec typ 50 usec typ Nil Unlimited 800%, min; 1200%, max
Power
Input Voltage – Continuous – Transient Power Dissipation Current Max Voltage Drop Max current without tripping Trip time Output Rise Time (turn ON) Output Fall Time under normal turn-off Output Fall Time under Fault Min Load Requirement
Protection
Short Circuit Protection Instant Trip
Physical Characteristics Temperature
Operating Temperature Storage Temperature TA = -55 °C to +100 °C TA = -55 °C to +125 °C Up to 30,000 ft Can be installed in an unpressurized area 1.825”L x 1.25”W x 0.38”H Any 20 grams typ 1.1 Mhrs at 25°C Full load
Environmental
Altitude Case Dimensions Operating Orientation Weight MTBF (Estimate: MIL STD 217F)
• 221 West Industry Court Deer Park, NY 11729-4681 Phone (631) 586 7600 Fax (631) 242 9798 • • World Wide Web - http://www.sensitron.com • E-Mail Address - sales@sensitron.com •
SENSITRON SEMICONDUCTOR
TECHNICAL DATA DATASHEET 4310, Rev B Figure 1 - Trip Curve
SPDXXD28 SERIES
Figure 2 - Timing Diagram
• 221 West Industry Court Deer Park, NY 11729-4681 Phone (631) 586 7600 Fax (631) 242 9798 • • World Wide Web - http://www.sensitron.com • E-Mail Address - sales@sensitron.com •
SENSITRON SEMICONDUCTOR
TECHNICAL DATA DATASHEET 4310, Rev B Table 2 - Signal Timing – (-55 oC to 100 oC @ LINE = 28V DC) Parameter CONTROL to GATE Status Delay for Turn On Turn ON Delay Load Current Rise Time Turn ON to LOAD Status Delay CONTROL to GATE Status Delay for Turn Off Turn OFF Delay Load Current Fall Time Turn OFF to LOAD Delay Symbol t0 t1 t2 t3 t4 t5 t6 t7 Min Max 1 200 200 1 1 200 200 1
SPDXXD28 SERIES
50
50
Units ms µs µs ms ms µs µs ms
Note: Current Fall Time from trip dependent on magnitude of overload Figure 3 - Mechanical Dimensions
Table 3 - Pin Definitions Pin Number 1 2 3 4 5 6 7 8 9 10 Pin Name BIAS GND GATE Status LOAD Status CONTROL Input LINE --PWRGND --LOAD Function +5V DC Supply 5V Return Switch Status Load Current Detection On/Off Control +28V DC Supply No Pin 28V Return No Pin Load Connection
• 221 West Industry Court Deer Park, NY 11729-4681 Phone (631) 586 7600 Fax (631) 242 9798 • • World Wide Web - http://www.sensitron.com • E-Mail Address - sales@sensitron.com •
SENSITRON SEMICONDUCTOR
TECHNICAL DATA DATASHEET 4310, Rev B Table 4 – Individual Model Ratings SPD5D28 Family
SPDXXD28 SERIES
Model
Current Rating @ 100OC Power Dissipation
SPD5D28-1
1A 0.01W typ @ 0.6A 25OC 0.035W max @ 1A 25OC 0.04W max @ 1A 100OC 18mV typ @ 0.6A 25OC 35mV max @ 1A 25OC 40mV max @ 1A 100OC
SPD5D28-3
3A 0.04W typ @ 1.8A 25OC 0.14W max @ 3A 25OC 0.16W max @ 3A 100OC 23mV typ @ 1.8A 25OC 46mV max @ 3A 25OC 53mV max @ 3A 100OC
SPD5D28-5
5A 0.09W typ @ 3A 25OC 0.30W max @ 5A 25OC 0.36W max @ 5A 100OC 30mV typ @ 3A 25OC 60mV max @ 5A 25OC 71mV max @ 5A 100OC
Max Voltage Drop
SPD14D28 Family
Model
Current Rating @ 100OC Power Dissipation
SPD14D28-7
7A 0.15W typ @ 4.2A 25OC 0.49W max @ 7A 25OC 0.60W max @ 7A 100OC 35mV typ @ 4.2A 25OC 70mV max @ 7A 25OC 86mV max @ 7A 100OC
SPD14D28-10
10A 0.26W typ @ 6A 25OC 0.87W max @ 10A 25OC 1.10W max @ 10A 100OC 43mV typ @ 6A 25OC 87mV max @ 10A 25OC 110mV max @ 10A 100OC
SPD14D28-14
14A 0.48W typ @ 8.4A 25OC 1.61W max @ 14A 25OC 2.06W max @ 14A 100OC 57mV typ @ 8.4A 25OC 115mV max @ 14A 25OC 147mV max @ 14A 100OC
Max Voltage Drop
SPD25D28 Family
Model
Current Rating @ 100OC Power Dissipation
SPD25D28-16
16A 0.41W typ @ 9.6A 25OC 1.44W max @ 16A 25OC 1.73W max @ 16A 100OC 43mV typ @ 9.6A 25OC 90mV max @ 16A 25OC 108mV max @ 16A 100OC
SPD25D28-20
20A 0.60W typ @ 12A 25OC 2.11W max @ 20A 25OC 2.56W max @ 20A 100OC 50mV typ @ 12A 25OC 105mV max @ 20A 25OC 128mV max @ 20A 100OC
SPD25D28-25
25A 0.90W typ @ 15A 25OC 3.15W max @ 25A 25OC 3.86W max @ 25A 100OC 60mV typ @ 15A 25OC 126mV max @ 25A 25OC 154mV max @ 25A 100OC
Max Voltage Drop
• 221 West Industry Court Deer Park, NY 11729-4681 Phone (631) 586 7600 Fax (631) 242 9798 • • World Wide Web - http://www.sensitron.com • E-Mail Address - sales@sensitron.com •
SENSITRON SEMICONDUCTOR
TECHNICAL DATA DATASHEET 4310, Rev B Figure 4 - Electrical Block Diagram
SPDXXD28 SERIES
Description Figure 4 shows the block diagram of the SPDXXD28 SSPC Series. It uses a SN74LVC3G14 device for digital I/O. This TTL compatible device has a Schmitt-Trigger input to minimize the effects of noise on the input. Its outputs can each drive more than 10 standard TTL loads. It’s also compatible with CMOS inputs and outputs. The SN74LVC3G14 is isolated from the remainder of the module circuitry by three optocouplers. The block labeled “Control & Protection Circuitry” gets power from the DC-DC converter and is referenced to the output of the SSPC. This block contains an amplifier to gain up the voltage developed across the sense resistor. It also contains a microcontroller with on-board timers, A/D converter, clock generator and independent watchdog timer. The microcontroller implements a precision I2t protection curve as well as an Instant Trip function to protect the wiring and to protect itself. It performs all of the functions of multiple analog comparators and discrete logic in one high-reliability component. The code programmed in the microcontroller acquires the output of the internal A/D converter, squares the result and applies it to a simulated RC circuit. It checks the output of the simulated circuit to determine whether or not to trip (turn off the power Mosfets). Because the microcontroller simulates an analog RC circuit, the SSPC has ‘thermal memory’. That is, it trips faster if there had been current flowing prior to the overload than if there hadn’t been current flowing. This behavior imitates thermal circuit breakers and better protects the application’s wiring since the wiring cannot take as much an overload if current had been flowing prior to the overload.
• 221 West Industry Court Deer Park, NY 11729-4681 Phone (631) 586 7600 Fax (631) 242 9798 • • World Wide Web - http://www.sensitron.com • E-Mail Address - sales@sensitron.com •
SENSITRON SEMICONDUCTOR
TECHNICAL DATA DATASHEET 4310, Rev B
SPDXXD28 SERIES
The watchdog timer operates from its own internal clock so a failure of the main clock will not stop the watchdog timer. The code programmed in the microcontroller will periodically reset the watchdog timer preventing it from timing out. If the code malfunctions for any reason, the watchdog timer is not reset and it times out. When the watchdog timer times out, it resets the microcontroller. Since the code is designed to detect levels and not edges, the output of the module, and therefore the output of the SPDXXD28, immediately reflects the command on its input. The Power Mosfets used in the SPDXXD28 Series have been selected for very low Rds(on) and results in low voltage drop and low power dissi
