MCH2812S

Crane Aerospace & Electronics Power Solutions MCH/MGH Single and Dual DC/DC Converters 28 VOLT INPUT – 1.5 WATT FEATURES • • • • • • • • • • • -55°C to +125°C operation 12 to 50 VDC input Fully isolated Magnetic feedback Fixed frequency 370 kHz typ. Topology – Current Mode Flyback 80 V for up to 120 ms transient protection (70 V for 15 V single and dual models) Inhibit function Indefinite short circuit protection Undervoltage lockout Up to 79% efficiency (MGH models) MODELS VDC OUTPUT SINGLES 5 5.2 (MCH) 12 15 DUALS ±5 ±12 ±15 MCH SERIES™ SINGLE & DUAL DC/DC CONVERTERS With a miniature footprint of just 0.8 square inches, the MCH Series™ of DC/DC converters delivers 1.5 watts of output power while saving significant board real estate. The wide input voltage range of 12 to 50 VDC accepts the varying voltages of military, aerospace, or space bus power and tightly regulates output voltages to protect downstream components. Transient protection of 80 volts for up to 120 milliseconds exceeds the requirements of MIL-STD-704A for the 5, 5.2, and 12 volt single models and the 12 volt dual model. The 15 volt single and dual converters will withstand transients of up to 70 volts for up to 120 milliseconds. INHIBIT FUNCTION When an open collector TTL logic low is applied to the inhibit terminal, pin 7, the converter shuts down and lowers the output voltage to near zero and input current to as low as 2.3 mA. Leaving the terminal open or applying an open collector TTL logic high will enable the converter. PROTECTION FEATURES Undervoltage lockout prevents the MCH Series converters from operating below approximately 8 VDC input voltage to keep system current levels smooth, especially during initialization or re-start operations. All models include a soft-start function to prevent large current draw and minimize overshoot. The converters also provide short circuit protection by restricting the current. CONVERTER DESIGN MCH Series DC/DC converters incorporate a continuous flyback topology with a constant switching frequency of approximately 370 kHz. Current-mode pulse width modulation (PWM) provides output voltage regulation. Output error voltage is magnetically fed back to the input side of the PWM to regulate output voltage. Regulation is also affected by the load; refer to the Electrical Characteristics tables on the following pages. Dual models regulate the negative output with magnetic coupling to the positive output. Up to 80% of the total load may be on one output providing that the other output carries a minimum of 20% of the total load. The dual models can be used at double the output voltage by connecting the load between positive and negative outputs, leaving the common unconnected. (ex: MCH2805D can be used as a 10 VDC output.) MIL-STD-461 Use Interpoint’s FMSA-461 EMI filter to pass the CE03 requirements of MIL-STD-461C. CONVENIENT PACKAGING The MCH Series converters are packaged in hermetically sealed, projection-welded metal cases which provide EMI/RFI shielding. Crane Aerospace & Electronics Electronics Group (Interpoint Brand) PO Box 97005 • Redmond WA 98073-9705 425.882.3100 • electronics@craneae.com www.craneae.com Page 1 of 18 Rev E - 20060508 Crane Aerospace & Electronics Power Solutions MCH/MGH Single and Dual DC/DC Converters 28 VOLT INPUT – 1.5 WATT MGH SERIES™ SINGLE & DUAL DC/DC CONVERTERS The MGH Series™ of DC/DC converters delivers 1.5 watts of output power in a labor saving surface mount package. The wide input voltage range of 12 to 50 VDC accepts the varying voltages of military, aerospace, or space applications. Single output converters feature outputs of 5, 12, or 15 volts while dual output models feature outputs of ±5, ±12, or ±15 volts. Transient protection of 80 volts for up to 120 milliseconds exceeds the requirements of MIL-STD-704A for the 5 and 12 volt single and dual models. The 15 volt single and dual converters will withstand transients of up to 70 volts for up to 120 milliseconds. PROTECTION FEATURES Undervoltage lockout prevents the MGH Series converters from operating below approximately 8 VDC input voltage to keep system current levels smooth, especially during initialization or re-start operations. All models include a soft-start function to prevent large current draw and minimize overshoot. The MGH Series of converters also provide short circuit protection by limiting the current to approximately 125% of full load. MIL-STD-461 Use Interpoint’s FMGA-461 EMI filter to pass the CE03 requirements of MIL-STD-461C. CONVERTER DESIGN MGH Series DC/DC converters incorporate a continuous flyback topology with a constant switching frequency of approximately 370 kHz. Output voltage regulation is accomplished on the primary side using current-mode pulse width modulation (PWM). Regulation is affected by the output load; refer to the specifications tables for more information. For dual output models, up to 80% of the total load may be on one output providing the other output carries a minimum of 20% of the total load. The dual models can be used at double the output voltage by connecting the load between positive and negative outputs, leaving the common unconnected. As an example the MGH2805D (5 volt dual output) can be used as a 10 VDC output. SURFACE MOUNT PACKAGE MGH DC/DC converters can be surface mounted with pick-andplace equipment or manually. It is recommended that the case be attached with flexible epoxy adhesive or silicone which is thermally conductive (>1 watt /meter/°K). Internal components are soldered with SN96 (melting temperature 221°C) to prevent damage during reflow. Maximum reflow temperature for surface mounting the MGH converter is 220°C for a maximum of 30 seconds. SN60, 62, or 63 are the recommended types of solder. Hand soldering should not exceed 300°C for 10 seconds per pin. The hermetically sealed metal cases are available in two different lead configurations. See case B for dimensions and options. INHIBIT FUNCTION When an open collector TTL logic low is applied to the inhibit terminal, pin 18, the converter shuts down and lowers the output voltage to near zero and input current to as low 2.3 mA. Leaving the terminal open or applying an open collector TTL logic high will enable the converter. Positive Input + +Vin Inhibit Shutdown PWM Controller FB + +Vout + Input Common Case Ground Output Common Negative Output Positive Output Dual models only FIGURE 1: MGH BLOCK DIAGRAM www.craneae.com Page 2 of 18 Rev E - 20060508 Crane Aerospace & Electronics Power Solutions MCH/MGH Single and Dual DC/DC Converters 28 VOLT INPUT – 1.5 WATT OPERATING CONDITIONS AND CHARACTERISTICS Input Voltage Range • 12 to 50 VDC continuous • 80 V for 120 msec transient (70 V for 15 V single and dual models) Output Power • 1.5 W Capacitive Load • 200 μF single output models • 100 μF each output, dual output models Lead Soldering Temperature • Reflow 220°C 30 sec. max SN60, 62 or 63 recommended solder • Hand solder 300°C 10 sec. max per lead Storage Temperature Range (Case) • –65°C to +150°C Case Operating Temperature (Tc) • –55°C to +125°C full power • –55°C to +135°C absolute Derating Output Power/Current (Tc) • Linearly from 100% at 125°C to 0% at 135°C Output Voltage Temperature Coefficient • 100 ppm/°C typical Input to Output Capacitance • 100 to 170 pF typical Current Limit • 125% of full load typical Isolation • 100 megohm minimum at 500 V Audio Rejection • 40 dB typical Conversion Frequency (kHz) • 25°C 300 min, 370 typ, 450 max • –55°C to +125°C 270 min, 370 typ, 470 max Inhibit Pin Voltage (unit enabled) • 7 to 12 V Undervoltage Lockout • 8 V input typical INHIBIT Inhibit – TTL Open Collector • Logic low (output disabled) Logic low voltage ≤0.8 V Inhibit pin current 1 mA max • Referenced to input common • Logic high (output enabled) open collector MECHANICAL AND ENVIRONMENTAL Size (maximum) MCH models 0.980 x 0.805 x 0.270 inches (24.89 x 20.45 x 6.86 mm) See case A2 for dimensions. MGH models 1.010 x 0.880 x 0.250 inches (25.65 x 22.35 x 6.35 mm) Shown on page one with “gull wing” lead option, also available with straight leads. See case B for dimensions and options. Weight (maximum) 12 grams typical Screening Standard, ES, or 883 (Class H, QML). See “883, Class H, QML Products – Element Evaluation” and “883, Class H, QML Products – Environmental Screening” for more information. POSITIVE 1 INPUT + 0.47 μF typical +VIN FB + 3 POSITIVE OUTPUT INHIBIT 7 SHUTDOWN PWM CONTROLLER +VOUT + 4 OUTPUT COMMON 6 NEGATIVE OUTPUT DUAL MODELS ONLY INPUT COMMON 2 FIGURE 2: MCH BLOCK DIAGRAM www.craneae.com Page 3 of 18 Rev E - 20060508 Crane Aerospace & Electronics Power Solutions MCH/MGH Single and Dual DC/DC Converters 28 VOLT INPUT – 1.5 WATT PIN OUT MCH MODELS Pin 1 2 3 4 5 6 7 Single Output Positive Input Input Common Positive Output Output Common Case Ground No connection Inhibit Dual Output Positive Input Input Common Positive Output Output Common Case Ground Negative Output Inhibit Squared corner and dot on top of cover indicate pin one. 12 3 4 7 6 5 See case A2 for dimensions. FIGURE 3: MCH PIN OUT PINS NOT IN USE Inhibit (INH1, INH2) Pin 2, 12, 15, 16, 17 (pins with no connection) Leave unconnected Ground to input common PIN OUT MGH MODELS Pin 1 2 3 4, 5 6, 7 8, 9 10, 11 12 13, 14 15, 16, 17 18 Single Output Positive Input No connection Input Common Positive Output Case Ground Output Common Case Ground No connection No connection No connection Inhibit Dual Output Positive Input No connection Input Common Positive Output Case Ground Output Common Case Ground No connection Negative Output No connection Inhibit 1 2 3 4 5 6 7 8 9 TOP VIEW MGH 18 17 16 15 14 13 12 11 10 Differently colored glass bead around pin one or dimple in header (bottom or side of case) indicates pin one. Cover marking is oriented with pin one at the upper right corner. See case B for dimensions and “gull-wing” option. FIGURE 4: MGH PIN OUT To meet specified performance, all pins must be connected except “No Connection” pins. www.craneae.com Page 4 of 18 Rev E - 20060508 Crane Aerospace & Electronics Power Solutions MCH/MGH Single and Dual DC/DC Converters 28 VOLT INPUT – 1.5 WATT MCH Model Selection Table (see next page for MGH options) MODEL NUMBERING KEY SMD NUMBERS STANDARD MICROCIRCUIT DRAWING (SMD) 5962-9569601HXC 5962-9569701HXC 5962-9569801HXC 5962-9570201HXC 5962-9570301HXC 5962-9570401HXC MCH SERIES SIMILAR PART MCH2805S/883 MCH2812S/883 MCH2815S/883 MCH2805D/883 MCH2812D/883 MCH2815D/883 MCH Base Model Input Voltage 28 12 D / 883 Output Voltage (R = decimal point, 3R3 = 3.3 Vout) Number of Outputs (S = single, D = dual) Screening (Standard screening has no designator in this position.) For exact specifications for an SMD product, refer to the SMD drawing. SMDs can be downloaded from: http://www.dscc.dla.mil/programs/smcr Model Selection MCH28 Base model Vout value number of outputs case option screening Choose one from each of the following rows Vout value Number of outputs Case option Screening for singles: 5, 5R2, 12, 15 duals: 5, 12, 15 “R” = decimal point, 3R3 = 3.3 VDC S (single) or D (dual) standard (case A2, leave blank) standard screening, leave blank /ES (ES screening), /883 (Class H, QML) www.craneae.com Page 5 of 18 Rev E - 20060508 Crane Aerospace & Electronics Power Solutions MCH/MGH Single and Dual DC/DC Converters 28 VOLT INPUT – 1.5 WATT MGH Model Selection Table (see previous page for MCH options) MODEL NUMBERING KEY SMD NUMBERS MGH Base Model Input Voltage Output Voltage Number of Outputs (S = single, D = dual) 28 12 S Z / ES STANDARD MICROCIRCUIT DRAWING (SMD) 5962-9569601HYC 5962-9569701HYC 5962-9569801HYC 5962-9570201HYC 5962-9570301HYC 5962-9570401HYC MCH/MGH SERIES SIMILAR PART MGH2805S/883 MGH2812S/883 MGH2815S/883 MGH2805D/883 MGH2812D/883 MGH2815D/883 Gull Wing Lead Option (Straight leaded case has no designator in this position.) Screening (Standard screening has no designator in this position.) For exact specifications for an SMD product, refer to the SMD drawing. For the gull wing lead option, replace the Y in the SMD number (HYC) with a Z (HZC). SMDs can be downloaded from http://www.dscccols.com/programs/smcr Model Selection MGH28 Base model Vout value number of outputs screening Choose one from each of the following rows Vout value Number of outputs Screening singles: 5, 12, 15 “R” = decimal point, 3R3 = 3.3 VDC duals: 5, 12, 15 S (single) or D (dual) standard screening, leave blank /ES (ES screening), /883 (Class H, QML) www.craneae.com Page 6 of 18 Rev E - 20060508 Crane Aerospace & Electronics Power Solutions MCH/MGH Single and Dual DC/DC Converters 28 VOLT INPUT – 1.5 WATT Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified. MCH SINGLE OUTPUT MODELS PARAMETER CONDITIONS OUTPUT VOLTAGE2 Tc = 25°C Tc = –55°C TO +125°C OUTPUT CURRENT V = 12 to 50 VDC IN MCH2805S MCH2812S MCH2815S MIN TYP MAX MIN TYP MAX MIN TYP MAX 4.95 5 5.05 11.88 12 12.12 14.85 15 15.15 4.80 5 5.20 11.52 12 12.48 14.40 15 15.60 — — 300 — — 125 — — 100 0 — — — — — — — — 12 0 — — — — — — 72 69 — — — — –500 –500 — — –500 –500 — — — — — — — 45 65 35 40 350 380 100 115 28 — 5.5 6.0 2.3 2.4 100 130 77 75 1.3 1.4 3.0 3.5 185 185 125 125 170 180 0.75 0.75 7 10 0 0 1.5 150 300 120 120 800 800 200 300 50 80 11 11 3.5 3.5 200 250 — — 2.0 2.3 15 15 500 500 500 600 0 — — — — — — — — 12 0 — — — — — — 74 72 — — — — –700 –800 — — — 1.5 0 — — — — — — — — 12 0 — — — — — — 74 72 — — — — –700 –800 — — — 35 50 70 80 700 760 165 185 28 — 6.0 6.5 2.3 2.4 100 150 79 77 2.3 2.5 4.0 4.0 350 380 140 180 1.5 150 250 350 350 1600 1600 350 450 50 70 12 12 3.5 3.5 200 250 — — 3.7 4.0 20 20 700 800 600 750 850 850 2.5 2.5 40 40 450 450 UNITS VDC mA W mV p-p mV OUTPUT POWER OUTPUT RIPPLE VOLTAGE LINE REGULATION LOAD REGULATION V IN = 12 TO 50 VDC INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT INPUT RIPPLE CURRENT3 EFFICIENCY LOAD FAULT 4,5 STEP LOAD RESPONSE6 STEP LINE RESPONSE6 START-UP 10 kHz - 2 MHz Tc = –55°C TO +125°C V = 12 TO 50 VDC IN Tc = –55°C TO +125°C 10% TO FULL LOAD Tc = –55°C TO +125°C 50% TO FULL1 Tc = –55°C TO +125°C CONTINUOUS TRANSIENT1 120 ms NO LOAD Tc = –55°C TO +125°C INHIBITED Tc = –55°C TO +125°C 10k Hz - 10 MHz Tc = –55°C TO +125°C Tc = 25°C Tc = –55°C TO +125°C POWER DISSIPATION Tc = –55°C TO +125°C RECOVERY1 Tc = -–55°C TO +125°C 50 %–100%– 50% LOAD TRANSIENT Tc = –55°C TO +125°C RECOVERY Tc =–55°C TO +125°C 12 TO 50 TO 12 V IN TRANSIENT1 Tc = –55°C TO +125°C RECOVERY1 Tc = –55°C TO +125°C DELAY Tc = –55°C TO +125°C OVERSHOOT1 Tc = –55°C TO +125°C 50 200 70 300 60 250 70 250 600 1400 640 1400 145 300 160 400 28 50 — 80 6.0 12 6.5 12 2.3 3.5 2.4 3.5 100 200 150 250 79 — 77 — 2.0 3.2 2.2 3.5 3.5 20 3.5 20 350 380 130 130 700 800 500 600 mV VDC V mA mA p-p % W ms mV pk μs 500 –1000 400 1000 –850 400 500 –1000 400 1000 –850 450 4.0 — 0.6 3.0 — 0.47 4.0 — 0.6 3.0 — 0.5 40 — 7 40 — 7 40 — 10 40 — 10 150 — 0 350 — 0 150 — 0 350 — 0 mV pk ms ms mV pk CAPACITIVE LOAD 1 Notes: 1. Guaranteed by design, not tested. 2. Specified at 50% total P . out 3. Lin = 2 μH. 4. Maximum duration of short circuit: 25°C-– 90 seconds, 125°C – 30 seconds. 5. Load fault is a short circuit (