DEMO MANUAL DC2150A LTC4366-2/LT4363-2 28V MIL-STD-1275D Surge Stopper DESCRIPTION Demonstration circuit 2150A uses the LTC®4366-2 and LT4363-2 surge stoppers to satisfy MIL-STD-1275D. This specification, created by the United States Department of Defense, sets down requirements of electrical systems powered from a military vehicle’s 28V power supply. DC2150A’s output voltage is limited to 44V when faced with MIL-STD-1275D’s onerous surge, spike, and ripple conditions. In most circumstances, satisfying MIL-STD1275D is as simple as placing this circuit in front of a 44V tolerant device. The default version, DC2150A-C, provides a minimum of 4A to the output in all conditions except the ±7V ripple condition (14Vpeak-to-peak). During the ripple condition, DC2150A-C provides a minimum of 2.8A to the load. Exceeding 2.8A during the input ripple condition may cause DC2150A-C to timeout and shutoff in less than PERFORMANCE SUMMARY MIL-STD-1275D’s one minute ripple ride-through requirement. DC2150A’s MOSFETs are protected against output overloads by current limiting. Sustained overvoltage or overcurrent conditions cause the circuit to turn off after a timer delay. It automatically retries after a cooldown cycle. DANGER! HIGH VOLTAGE TESTING SHOULD BE PERFORMED BY QUALIFIED PERSONNEL ONLY. AS A SAFETY PRECAUTION AT LEAST TWO PEOPLE SHOULD BE PRESENT DURING HIGH VOLTAGE TESTING. Design files for this circuit board are available at http://www.linear.com/demo/DC2150A L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Specifications for DC2150A-C are at TA = 25°C PARAMETER CONDITIONS Input Supply Operating MIN TYP MAX 8 28 40 500ms Surge 100 Survival (with Optional TVS Removed) –250 UNITS V V 250 V Output Regulation Voltage 41 43.6 46 V Current Limit 4.4 5 5.6 A dc2150af 1 DEMO MANUAL DC2150A QUICK START PROCEDURE Connect a 28V supply to the input and connect a load at the output. A good output load choice is a 10Ω power resistor rated at more than 200W. If the banana jacks are used, no connections are necessary at the turrets. The green LED turns on to indicate that the output is powered. lower voltages, but component tolerances, especially the MOSFET threshold voltages, prevent guaranteed operation below 8V. Next, raise the input voltage above 50V. The output shuts off as the circuit detects a high input voltage. Once the input is brought back to 28V, the output power is automatically reapplied after a cooldown timer cycle. Be patient, it can take 30 seconds for power to be reapplied. If the load at the output sinks less than 28mA, place jumper JP1 in the 1kΩ position to preload the output (be aware that preload resistors R34 and R35 may become hot as they dissipate nearly 2W when the input is at 44V). With less than 28mA of load current, MIL-STD-1275D’s repeated 100V/50ms input surge test causes capacitors C1-C12 to remain charged at 67V for an extended period of time while the output voltage is regulated to 44V. This is not harmful, but it may cause the LT4363 to timeout and shutoff Q4. MIL-STD-1275D Requirements Refer to Linear Technology Journal article, High Voltage Surge Stoppers Ease MIL-STD-1275D Compliance by Replacing Bulky Passive Components, and the MIL-STD1275D, Characteristics of 28 Volt DC Electrical Systems in Military Vehicles, United States Department of Defense Interface Standard for a thorough description of requirements. Now, lower the input voltage to 8V. The output remains powered. In fact, the output remains powered to even ASSEMBLY OPTIONS and ride through the 100V/50ms repeated surges specified in the MIL-STD-1275D recommended tests. These versions are not guaranteed to ride through the worst-case 500ms envelope in the MIL-STD-1275D specifications. No damage will occur, but these versions may shut off when faced with the full 100V/500ms worst-case envelope. Versions DC2150A-C and DC2150A-D provide at least 4A of current to the load and ride through the 100V/50ms repeated surges and the full worst-case 100V/500ms surge. (Refer to the MIL-STD-1275D standard and Linear Technology Journal article, High Voltage Surge Stoppers Ease MIL-STD-1275D Compliance by Replacing Bulky Passive Components, for a more thorough description of these requirements.) Versions DC2150A-A and DC2150A-C provide 1A and 2.8A during the ripple condition, respectively. Versions DC2150A-B and DC2150A-D shutoff immediately when ripple occurs on the input, but they have a reduced bill of materials cost. DC2150A is available from Linear Technology as DC2150A-C. This C version provides 4A to the load during all conditions except the ripple condition, where 2.8A is available to the load for up to one minute. Exceeding 2.8A during the ripple condition may cause the circuit to timeout in less than one minute. DC2150A-C provides uninterrupted power to the load during both the 100V/500ms worst-case surge envelope of MIL-STD-1275D and the repeated 100V/50ms recommended test. (Figure 1 shows DC2150A-C riding through the 100V/500ms surge. Figure 2 shows it riding through the repeated 100V/50ms surges. Figure 5 shows DC2150A-C providing uninterrupted power during a ±7V input ripple event.) Schematics and a bill of materials are provided for three additional assembly options. Versions DC2150A-A and DC2150A-B provide a minimum of 2A of current to the load Table 1. DC2150A Assembly Options MAX LOAD MAX LOAD DURING RIPPLE 100V/50ms SURGE (FIVE REPEATS) 100V/500ms SURGE DC2150A-A 2A 1A Yes No DC2150A-B 2A N/A Yes No DC2150A-C 4A 2.8A Yes Yes DC2150A-D 4A N/A Yes Yes STUFFING OPTION dc2150af 2 DEMO MANUAL DC2150A CIRCUIT OPERATION Unless otherwise specified, the description of circuit operation that follows applies to the default assembly option DC2150A-C. 100V/500ms Surge In MIL-STD-1275D, the worst-case MOSFET power dissipation condition occurs during the 100V input surge. The circuit shown in the schematic diagram regulates the output voltage to 44V. As a result, the circuit must drop 56V from the 100V input to the 44V output. In this MILSTD-1275D solution, to increase power available at the output, two series MOSFETs are used. The first MOSFET’s (Q3’s) source is regulated to 66V by the LTC4366, while the second MOSFET’s (Q4’s) source is regulated to 44V by the LT4363. This reduces the power that must be dissipated in either single MOSFET. Figures 1 and 2 show the results measured during surge testing. The oscilloscope waveform in Figure 1 shows this circuit operating through the full 100V/500ms MIL-STD1275D surge requirement. Figure 2 shows this circuit operating through the less stringent 100V/50ms pulses described in MIL-STD-1275D’s recommended tests. ±250V Spike and Reverse Input Protection The 250V spike condition is handled by MOSFET Q3. It is rated to withstand over 300V from drain to source, blocking the 250V spike condition seen at the input. MILSTD-1275D specifies that the input energy is limited to 15mJ which is easily handled by this MOSFET. Figure 3 shows the results of the 250V spike measured during MIL-STD-1275D testing. Similarly, the –250V spike test result is shown in Figure 4. In this condition, diode D4 is reverse biased during the –250V spike, blocking the spike from Q4 and the output. RLOAD = 10Ω 100V 250V SPIKE VIN 28V 43V 20V/DIV VIN 28V 50V/DIV VOUT 27V 4.3A 20V/DIV IOUT 2A/DIV 2.7A RLOAD = 10Ω VOUT 27V 50V/DIV IOUT 2.7A 5A/DIV 100ms/DIV 1µs/DIV Figure 1. MIL-STD-1275D 100V/500ms Surge Test Figure 3. Positive Input Spike IOUT 2.7A 5A/DIV VOUT 27V 50V/DIV 28V V 100V IN 50V/DIV VIN 28V 20V/DIV 27V VOUT 27V 20V/DIV IOUT 2A/DIV 2.7A 43V −250V SPIKE 4.3A RLOAD = 10Ω RLOAD = 10Ω 500ms/DIV 1µs/DIV Figure 2. MIL-STD-1275D 100V/50ms Surge Repeated Five Times Figure 4. Negative Input Spike dc2150af 3 DEMO MANUAL DC2150A CIRCUIT OPERATION D4 additionally provides reverse polarity protection, preventing negative input voltages from showing up at the output. (The LTC4366 surge stopper in front of D4 is capable of withstanding reverse voltages and the –250V spike without additional protection.) An optional bidirectional TVS (Transient Voltage Suppressor) is present at the input to provide extra protection. Its 150V breakdown voltage does not affect circuit operation below 100V. For applications where a TVS is not desirable at the input, this optional component can be removed. Note that the output voltage trace (VOUT) during the MILSTD-1275D spike tests in Figures 3 and 4 shows high frequency ringing which is a measurement artifact of the large currents that flow in supply and ground traces when the 0.1µF test circuit capacitor is discharged directly at the circuit input with all resistances and inductances minimized. ±7V Ripple Satisfying the ripple specification of MIL-STD-1275D requires several more components. Diode D4 in combination with capacitors C1-C12 form an AC rectifier. This rectified signal appears at the RIPCAP node. The LT4363 in combination with sense resistor R3 limits the maximum current to 5A (typical). If the rising edge of the input ripple waveform attempts to pull up the output capacitor with more than 5A, the LT4363 momentarily limits the current by pulling down on Q4’s gate. To quickly restore the gate voltage, the small charge pump formed by components D5, D6, C24, C25, and C26 supplements the LT4363’s internal charge pump to quickly pull up MOSFET Q4’s gate. Even still, the available load current must be reduced to 2.8A during this ripple condition. Figure 5 shows that the output remains powered during ripple testing. 35V VIN 5V/DIV 28V 21V 34V VOUT 5V/DIV 27.15V 20.3V IOUT 1A/DIV 2.715A RLOAD = 10Ω 10ms/DIV Figure 5. 14VP-P Input Ripple Condition Finally, thermal protection is implemented by components R25, R26, R27, Q6-1, Q6-2,Q5-1 and thermistor R29. If the temperature at Q4’s heat sink exceeds 105°C, the LT4363’s UV pin is pulled down by Q5-1 to force off MOSFET Q4 and limit its maximum temperature. Starting Mode Initial Engagement Surge It should also be noted that with the specified components, this circuit is only guaranteed to work down to a minimum of 8V during the starting mode initial engagement surge rather than the minimum 6V specified in MIL-STD-1275D. DC2150A Assembly Options Assembly options DC2150A-B and DC2150A-D eliminate capacitors C1-C12 to reduce total solution cost. In those assembly options, C25, C27, R31, R32, D7-1, and D7-2 inject a small current into the LT4363’s TIMER on each rising edge of the input ripple (which appears at the SOURCE1 node). In the face of ripple, those components will force the LT4363 to timeout quickly and turn off Q4. dc2150af 4 DEMO MANUAL DC2150A PCB LAYOUT DC2150A is designed to withstand input voltages from 250V to –250V when the optional 150V bidirectional TVS DP1 is removed. The maximum positive input voltage is limited by the 300V BVDSS rating of the input MOSFET (Q1 on DC2150A-A/DC2150A-B, and Q3 on DC2150A-C/ DC2150A-D). The negative input voltage is limited by the series diode (D1 on DC2150A-A/DC2150A-B, and D4 on DC2150A-C/DC2150A-D). Upstream of the RIPCAP node, spacings and component package sizes have been chosen to support the high voltages that may be present. Traces and components downstream of the RIPCAP node are limited to less than 67V by Q1/Q3 and the LTC4366. Negative voltages are blocked from traces and components downstream of the RIPCAP node by D1/D4. Top Silkscreen dc2150af 5 DEMO MANUAL DC2150A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 1 C13 CAP., X7R, 0.1µF, 100V 10% 1210 KEMET, C1210C104K1RAC7025 2 1 C14 CAP., X7R, 0.1µF, 500V 10% 1210 KEMET, C1210C104KCRACTU 3 0 C15, C28 CAP., OPT, 2220 OPTION 4 1 C17 CAP., X7R, 0.047µF, 100V 10% 0805 TDK, C2012X7R2A473K125AA 5 1 C18 CAP., ALUM., 68µF 50V 20% SMT SUN ELECT., 50CE68LX 6 1 C19 CAP., X7R, 0.1µF, 100V 10% 0805 TDK, C2012X7R2A104K125AA 7 1 C20 CAP., X7R, 0.47µF, 100V 10% 0805 AVX, 08051C474KAZ2A 8 1 C22 CAP., X7R, 1µF, 16V 10% 0805 TDK, C2012X7R1C105K085AC 9 1 C25 CAP., X7R, 1µF, 250V 10% 2220 TDK, C5750X7R2E105K230KA 10 1 DP1 DIODE, TVS, OPT., SMB VISHAY, P65MB150CA-E3/52 11 0 DP2 DIODE, TVS, OPT., SMC OPTION 12 1 D2 DIODE, SWITCHING, SOT-323 DIODES INC., BAS21W-7-F 13 1 D3 DIODE, SCHOTTKY, 30V 200mA, SOT-23 DIODES INC., BAT54-7-F 14 1 D9 LED, GREEN, DIFFUSED, 0805 AVAGO, HSMG-C170 15 4 E1, E3, E6, E7 BANANA JACK, NON-INSULATED KEYSTONE, 575-4 16 3 E2, E5, E11 TEST POINT, TURRET, 0.061, PBF MILL-MAX, 2308-2-00-80-00-00-07-0 17 4 E4, E8, E9, E10 TEST POINT, TURRET, 0.094, PBF MILL-MAX, 2501-2-00-80-00-00-07-0 18 1 JP1 HEADER, 2X2 PIN, 0.079CC SULLINS, NRPN022PAEN-RC 19 4 MP1, MP2, MP3, MP4 STANDOFF, NYLON 0.5" KEYSTONE, 8833 (SNAP ON) 20 2 Q5, Q6 TRANSISTOR, DUAL NPN, SOT-363 DIODES INC., MMDT5551-7-F 21 2 R1, R2 RES., CHIP, HIGH POWER, 100Ω, 3/4W, 5% 1210 VISHAY, CRCW1210100RJNEAHP 22 1 R4 RES., CHIP, 237k, 1/4W, 1% 1206 VISHAY, CRCW1206237KFKEA 23 1 R5 RES., CHIP, 100Ω, 1/8W, 1% 0805 YAGEO, RC0805FR-07100RL 24 1 R6 RES., CHIP, 10Ω, 1/8W, 5% 0805 VISHAY, CRCW080510R0JNEA 25 1 R7 RES., CHIP, 10k, 1/4W, 5% 1206 PANASONIC, ERJ-8GEYJ103V 26 1 R8 RES., CHIP, 30.1Ω, 1/8W, 1% 0805 VISHAY, CRCW080530R1FKEA 27 1 R9 RES., CHIP, 12.1k, 1/8W, 1% 0805 VISHAY, CRCW080512K1FKEA 28 1 R10 RES., CHIP, 1k, 1/2W, 1% 1210 VISHAY, CRCW1210KOOFKEA 29 2 R11, R13 RES., CHIP, 332k, 1/8W, 1% 0805 VISHAY, CRCW0805332KFKEA 30 1 R12 RES., CHIP, 649k, 1/4W, 1% 1206 VISHAY, CRCW1206649KFKEA 31 3 R14, R26, R27 RES., CHIP, 301k, 1/8W, 1% 0805 VISHAY, CRCW0805301KFKEA 32 2 R15, R19 RES., CHIP, 10k, 1/8W, 1% 0805 VISHAY, CRCW080510K0FKEA 33 3 R16, R17, R18 RES., CHIP, 18.2k, 1/2W, 1% 1210 VISHAY, CRCW121018K2FKEA 34 1 R20 RES., CHIP, 100k, 1/8W, 1% 0805 VISHAY, CRCW0805100KFKEA 35 0 R23 RES., CHIP, OPT, 0805 OPTION 36 1 R28 RES., CHIP, 1k, 1/8W, 5% 0805 NIC, NRC10J102TRF 37 1 R33 RES., CHIP, 9.31k, 1/2W, 1% 1210 PANASONIC, ERJ-14NF9311U dc2150af 6 DEMO MANUAL DC2150A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 38 2 R34, R35 RES., CHIP, 2k, 1W, 1% 2010 VISHAY, CRCW20102K00FKEFHP 39 0 R36 RES., CHIP, 10M, 1/4W, 5% 1206, OPTION PANASONIC, ERJ-8GEYJ106V (OPTION) 40 1 U1 IC, HIGH VOLTAGE SURGE STOPPER, TS8 LINEAR TECH., LTC4366HTS8-2#TRMPBF 41 1 U2 IC, HIGH VOLTAGE SURGE STOPPER WITH CURRENT LIMIT, SOIC LINEAR TECH., LT4363HS-2#PBF 42 1 XJP1 SHUNT, 2mm SAMTEC, 25N-BK-G DC2150A-A Required Circuit Components 1 1 DC2150A DC2150A GENERAL BOM 2 12 C1-C12 CAP., X7S, 10µF, 100V 20% 2220 TDK, C5750X7S2A106M230KB 3 1 C16 CAP., X7R, 0.022µF, 100V 10% 1206 KEMET, C1206C223K1RACTU 4 1 C21 CAP., X7R, 0.22µF, 25V 10% 0805 KEMET, C0805C224K3RACTU 5 0 C23, C27 NOT USED 6 2 C24, C26 CAP., X7R, 1µF, 250V 10% 2220 TDK, C5750X7R2E105K230KA 7 1 D1 DIODE ARRAY, TO-263 VISHAY, UHB20FCT-E3/4W 8 0 D4, D7, D8 NOT USED 9 2 D5, D6, D10 DIODE ARRAY, SOT23 DIODES INC., MMBD3004S-7-F 10 0 HS1, HS2, HS3 NOT USED 11 1 Q1 TRANS., MOSFET N-CH., 300V, TO-263 IXYS, IXTA36N30P 12 1 Q2 TRANS., MOSFET N-CH., 75V, TO-263 FAIRCHILD, FDB045AN08A0 13 0 Q3, Q4 NOT USED 14 1 R3 RES., CHIP, CURRENT SENSE, 0.020Ω, 1/2W, 1% 1206 IRC, LRC-LRF-1206LF-01-R020F 15 1 R21 RES., CHIP, 5.6M, 1/8W, 5% 0805 PANASONIC, ERJ-6GEYJ565V 16 1 R22 RES., CHIP, 0Ω, 1/8W, 0805 YAGEO, RC0805JR-070RL 17 1 R24 RES., CHIP, 20k, 1/8W, 5% 0805 VISHAY, CRCW080520K0JNEA 18 1 R25 RES., CHIP, 4.75k, 1/8W, 1% 0805 VISHAY, CRCW08054K75FKEA 19 1 R30 THERMISTOR, PTC, 470Ω , 0603 EPCOS, B59601A0105A062 20 0 R29, R31, R32 NOT USED dc2150af 7 DEMO MANUAL DC2150A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER DC2150A-B Required Circuit Components 1 1 DC2150A DC2150A GENERAL BOM 2 0 C1-C12 NOT USED 3 1 C16 CAP., X7R, 0.022µF, 100V 10% 1206 KEMET, C1206C223K1RACTU 4 1 C21 CAP., X7R, 0.22µF, 25V 10% 0805 KEMET, C0805C224K3RACTU 5 0 C23, C24, C26 NOT USED 6 1 C27 CAP., X7R, 0.033µF, 16V 10% 0805 KEMET, C0805C333K4RACTU 7 1 D1 DIODE ARRAY, TO-263 VISHAY, UHB20FCT-E3/4W 8 0 D4, D5, D6, D10 NOT USED 9 1 D7 DIODE ARRAY, SOT23 CENTRAL SEMI., CMPSH-3SE 10 1 D8 DIODE, ZENER 3.3V 500mW SOD-123 DIODES INC., MMSZ5226B-7-F 11 0 HS1, HS2, HS3 NOT USED 12 1 Q1 TRANS., MOSFET N-CH., 300V, TO-263 IXYS, IXTA36N30P 13 1 Q2 TRANS., MOSFET N-CH., 75V, TO-263 FAIRCHILD, FDB045AN08A0 14 0 Q3, Q4 NOT USED 15 1 R3 RES., CHIP, CURRENT SENSE, 0.020Ω, 1/2W, 1% 1206 16 0 R21, R22, R24, R29 NOT USED 17 1 R25 RES., CHIP, 4.75k, 1/8W, 1% 0805 VISHAY, CRCW08054K75FKEA 18 1 R30 THERMISTOR, PTC, 470Ω , 0603 EPCOS, B59601A0105A062 19 1 R31 RES., CHIP, 10k, 1/2W, 5% 1210 PANASONIC, ERJ-14YJ103U 20 1 R32 RES., CHIP, 100k, 1/8W, 5% 0805 YAGEO, RC0805JR-07100KL IRC, LRC-LRF-1206LF-01-R020F dc2150af 8 DEMO MANUAL DC2150A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER DC2150A-C Required Circuit Components 1 1 DC2150A DC2150A GENERAL BOM 2 12 C1-C12 CAP., X7S, 22µF, 100V 20% 2220 TDK, CKG57NX7S2A226M500JH 3 1 C16 CAP., X7R, 0.015µF, 100V 10% 1206 KEMET, C1206C153K1RACTU 4 1 C21 CAP., X7R, 2.2µF, 25V 10% 0805 TDK, CGA4J3X7R1E225K125AB 5 1 C23 CAP., X7R, 10µF, 16V 10% 0805 SAMSUNG, CL21B106KOQNNNE 6 2 C24, C26 CAP., X7R, 1µF, 250V 10% 2220 TDK, C5750X7R2E105K230KA 7 0 C27 NOT USED 8 0 D1, D7, D8 NOT USED 9 1 D4 DIODE ARRAY, TO-247 VISHAY, FEP30GP-E3/45 10 3 D5, D6, D10 DIODE ARRAY, SOT23 DIODES INC., MMBD3004S-7-F 11 3 HS1, HS2, HS3 HEATSINK, VERTICAL MOUNT ASSMANN WSW COMPONENTS, V8813X 12 0 Q1, Q2 NOT USED 13 1 Q3 TRANS., MOSFET N-CH., 300V, TO-3P IXYS, IXTQ88N30P 14 1 Q4 TRANS., MOSFET N-CH., 100V, TO-3P IXYS, IXTQ170N10P 15 1 R3 RES., CHIP, CURRENT SENSE, 0.010Ω, 1/2W, 1% 1206 IRC, LRC-LRF-1206LF-01-R010F 16 1 R21 RES., CHIP, 5.6M, 1/8W, 5% 0805 PANASONIC, ERJ-6GEYJ565V 17 1 R22 RES., CHIP, 6.19k, 1/8W, 1% 0805 VISHAY, CRCW08056K19FKEA 18 1 R24 RES., CHIP, 20k, 1/8W, 5% 0805 VISHAY, CRCW080520K0JNEA 19 1 R25 RES., CHIP, 1k, 1/8W, 1% 0805 VISHAY, CRCW08051K00FKEA 20 1 R29 THERMISTOR, PTC, 100Ω, RADIAL LEAD EPCOS, B59901D100A40 21 0 R30, R31, R32 NOT USED dc2150af 9 DEMO MANUAL DC2150A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER DC2150A-D Required Circuit Components 1 1 DC2150A DC2150A GENERAL BOM 2 0 C1-C12, C24, C26 NOT USED 3 1 C16 CAP., X7R, 0.015µF, 100V 10% 1206 KEMET, C1206C153K1RACTU 4 1 C21 CAP., X7R, 2.2µF, 25V 10% 0805 TDK, CGA4J3X7R1E225K125AB 5 1 C23 CAP., X7R, 10µF, 16V 10% 0805 SAMSUNG, CL21B106KOQNNNE 6 1 C27 CAP., X7R, 0.033µF, 16V 10% 0805 KEMET, C0805C333K4RACTU 7 0 D1, D5, D6, D10 NOT USED 8 1 D4 DIODE ARRAY, TO-247 VISHAY, FEP30GP-E3/45 9 1 D7 DIODE ARRAY, SOT23 CENTRAL SEMI., CMPSH-3SE 10 1 D8 DIODE, ZENER 3.3V 500mW SOD-123 DIODES INC., MMSZ5226B-7-F 11 3 HS1, HS2, HS3 HEATSINK, VERTICAL MOUNT ASSMANN WSW COMPONENTS, V8813X 12 0 Q1, Q2 NOT USED 13 1 Q3 TRANS., MOSFET N-CH., 300V, TO-3P IXYS, IXTQ88N30P 14 1 Q4 TRANS., MOSFET N-CH., 100V, TO-3P IXYS, IXTQ170N10P 15 1 R3 RES., CHIP, CURRENT SENSE, 0.010Ω, 1/2W, 1% 1206 IRC, LRC-LRF-1206LF-01-R010F 16 1 R22 RES., CHIP, 6.19k, 1/8W, 1% 0805 VISHAY, CRCW08056K19FKEA 17 1 R25 RES., CHIP, 1k, 1/8W, 1% 0805 VISHAY, CRCW08051K00FKEA 18 1 R29 THERMISTOR, PTC, 100Ω, RADIAL LEAD EPCOS, B59901D100A40 19 1 R31 RES., CHIP, 10k, 1/2W, 5% 1210 PANASONIC, ERJ-14YJ103U 20 1 R32 RES., CHIP, 100k, 1/8W, 5% 0805 YAGEO, RC0805JR-07100KL 21 0 R21, R24, R30 NOT USED dc2150af 10 A B C E10 GND E7 GND E6 INPUT U1 3 Q1 * N/A 4A 4A -C -D 5 N/A 2.8A 1A 2A 5X MAX LOAD DURING 100V/50ms 100V/500ms SURGE SURGE RIPPLE 2A IL ASSEMBLY TYPES SHDN 2 Q3* R5 100 3 C14 0.1uF C21 * TP1 2 2 R1 100 1210 LTC4366HTS8-2 R4 237K 1206 DP2 OPT 1 -A -B STUFFING OPTION DP1 TVS INPUT 1 2 INPUT E9 1 2 2 1 HS1 * 1 1 VDD TIMER 3 8 GATE 1 6 C16* R16 18.2K 1210 R17 18.2K 1210 D3 BAT54 FB R7 10K 1206 R36 10M 1206 (OPTION) E5 C24* 2 3 SOURCE1 D5 * R18 18.2K 1210 2 1 D7 * C8 * C7 * C12 * C9 * C6 * C3 * 2 1 Q6-2 1 2 3 1 MP2 MP3 MP4 Q5-2 2 R26 301K D1* D4* T HS2* 5 3 2 2 3 1 E2 R28 1K Q5-1 R20 100K TP3 R14 301K C28 OPT 2220 D10 * CUSTOMER NOTICE R30* 0603 R24 * 1 1 2 3 R19 10K R13 332K C19 0.1uF R10 1K 1210 8 R8 30.1 3 SHDN OV UV THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE 2 3 1 U2 - ECO R22 * DATE: N/A SIZE 16 12 13 4 3 FLT + 04/25/2014 E3 GND C18 68uF E1 1 SHEET 1 DEMO CIRCUIT 2150A 2 OF 1 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only E11 E4 R35 2K 2010 OUTPUT R34 2K 2010 NONE C15 OPT 2220 GND R23 OPT E8 OUTPUT D9 GREEN R33 9.31K 1210 2 1 1K DATE 04/25/2014 APPROVED DAN EDDLEMAN JP1 PRELOAD 1 MIL-STD-1275D TECHNOLOGY C23 * R21 * FLT ENOUT FB R15 10K R11 332K PRODUCTION DESCRIPTION REVISION HISTORY IC NO. LTC4366HTS8-2 TITLE: SCHEMATIC TP4 R3 * 1206 2 REV LT4363HS-2 C22 1.0uF R6 10 OHM APPROVALS 9 10 2 D2 BAS21W 2 Q4 * C13 0.1uF R2 100 1210 Q2 * C17 0.047uF HS3* 2 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. M.HAWKINS VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL DAN APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED EDDLEMAN CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. T TP2 Q6-1 5 C26* 2 3 RIPCAP D6 * R27 301K R29 AFFIXED TO HS3 R29 * THRU-HOLE R25 * 2. ALL RESISTORS ARE 0805 PACKAGE U.O.N. STANDOFFS, 4 PLCS 4 C11 * C5 * C4 * C10 * C2 * D8 * C1 * 3 C27 * 1. FOR COMPONENTS DESIGNATED WITH *, REFER TO BOM FOR APPROPRIATE PART NUMBER FOR EACH ASSEMBLY TYPE. NOTES: MP1 C20 0.47uF R12 649K 1206 R9 12.1K C25 1.0uF R32 * R31 * 1210 3 1 HIGH VOLTAGE THIS SIDE 5 VSS 4 7 OUT BASE 1 D 3 1 6 1 2 3 4 1 6 VCC 4 6 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 1 2 SNS 2 3 3 4 4 15 GND 11 GATE TIMER 1 OUT NC NC NC NC 3 5 14 7 2 1 5 A B C D DEMO MANUAL DC2150A SCHEMATIC DIAGRAM dc2150af 11 DEMO MANUAL DC2150A DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation dc2150af 12 Linear Technology Corporation LT 0714 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2014