400 Watt Medical & ITE Power Supplies

PM400 SERIES

Description

The FSP PM400 series offers AC-DC switching power supplies in a 4 x 7 x 1.58 inch package, delivering 400W continuous power with 7 CFM forced air cooling or 300W with convection cooling. Built on a printed circuit board with U-bracket for support and heat sinking, these units are designed for medical applications and certified to IEC/EN/UL 62368-1, suitable for data networking, industrial, and telecommunication sectors.

Features

BF Class insulation
Operation altitude up to 5000 meters
100-240 VAC input with active PFC
Less than 300 μA leakage current
5VDC at 100mA standby output
EN55011 / EN55032 Class B conducted emissions
Inhibit: TTL low to disable output
Standard PS Off and DC OK signals
High Efficiency 92% typical
Compliant with RoHS requirements

Input Specifications

Input voltage:	90-264 VAC
Input frequency:	47-63 Hz
Input current:	4.2 A (rms) @115 VAC, 60 Hz 2.1 A (rms) @ 230 VAC, 50 Hz
Earth leakage current:	300 μA max. @ 264 VAC, 63 Hz
Touch current:	100 μA max. @ 264 VAC, 63 Hz

Output Specifications

Output voltage/current: See rating chart.
Maximum output power: See rating chart.
Ripple and noise: 1% peak to peak maximum
Remote sense: Compensation for cable losses up to 0.5 V
Over voltage protection: Set at 115-140% of nominal output voltage, automatic recovery
Short circuit protection: Automatic recovery
Over temperature protection: Latching by recycle input to reset
Temperature coefficient: All outputs ±0.04% /°C maximum
Transient response: Maximum excursion of 4%, recovering to 1% of final value within 500 μs after a 25% step load change
Standby power: 5 V at 100 mA maximum
Fan power: 12 V at 250 mA maximum

Environmental Specifications

Operating temperature:	-10°C to +70°C
Storage temperature:	-40°C to +85°C
Relative humidity:	5% to 95% non-condensing
Temperature derating:	Derate from 100% at +50°C linearly to 50% at +70°C, applicable to convection and forced-air cooling conditions.

Safety Standard Approvals

UL ES 60601-1, CSA C22.2 No. 60601-1 (File No. E178020)
TÜV EN 60601-1 (Bauart geprüft - Type tested, Sicherheit - Safety, Regelmäßige Produktions-überwachung - Regular production monitoring)
UL 62368-1, CSA C22.2 No. 62368-1
TÜV EN 62368-1

General Specifications

Switching frequency:	85 KHz (typical)
Efficiency:	Typical 89% @ 115 VAC, 92% @ 230 VAC
Hold-up time:	12 ms minimum at 110 VAC & 400 W
Line regulation:	±0.5% maximum at full load
Inrush current:	20 A @ 115 VAC, or 40 A @ 230 VAC, at 25°C cold start
Withstand voltage:	4000 VAC from input to output (2 MOPP) 1500 VAC from input to ground (1 MOPP) 1500 VAC from output to ground
MTBF:	250,000 hours at full load at 25°C ambient, calculated per MIL-HDBK-217F

EMC Performance

EN55011/ EN55032: Class B conducted, class A radiated
EN61000-3-2: Harmonic distortion, class A and D
EN61000-3-3: Line flicker
EN60601-1-2, EN55024: General EMC immunity standards
EN61000-4-2: ESD, ±15 KV air and ±8 KV contact
EN61000-4-3: Radiated immunity, 9-28 V/m
EN61000-4-4: Fast transient/burst, ±2 KV
EN61000-4-5: Surge, ±1 KV diff., ±2 KV com
EN61000-4-6: Conducted immunity, 10 Vrms
EN61000-4-8: Magnetic field immunity, 30 A/m
EN61000-4-11: Voltage dip immunity, 30% reduction for 500 ms, 100% reduction for 10 ms

Interface Signals

PFD: TTL logic high for normal operation and TTL logic low upon loss of input power. This signal appears at least 1 ms prior to master output dropping 5% below its nominal value. This signal also provides a minimum delay of 100 ms after master output is within regulation.
Inhibit: TTL low to turn off output
DC OK: TTL high when output voltage >95%
PS OFF: TTL high to turn off output

Output Power Derating Curve

A graph illustrating the relationship between ambient temperature and maximum output power percentage. The curve shows that the power supply can deliver 100% of its rated output up to an ambient temperature of 50°C. Beyond 50°C, the output power is derated linearly, reaching 50% at 70°C. The x-axis represents ambient temperature in °C, ranging from -10°C to 70°C. The y-axis represents Output Power in percentage, from 0% to 100%.

Output Voltage/Current Rating Chart

Model	V1	Min. Current	Max. Current at convection	Max. Current at 7 CFM	Tol.	Ripple & Noise	Max. Output Power	Efficiency (typical) 115/230 Vac
PM400-12B	12 V	0.1 A	25.00 A	33.34 A	±2%	120 mV	300 W /400 W	90 /92%
PM400-13B	15 V	0.1 A	20.00 A	26.67 A	±2%	150 mV	300 W /400 W	90 /92%
PM400-13-1B	18 V	0.1 A	16.67 A	22.23 A	±2%	180 mV	300 W /400 W	91 /92%
PM400-14B	24 V	0.1 A	12.50 A	16.67 A	±2%	240 mV	300 W /400 W	89 /91%
PM400-15B	28 V	0.1 A	10.72 A	14.29 A	±2%	280 mV	300 W /400 W	89 /91%
PM400-17B	36 V	0.1 A	8.34 A	11.12 A	±2%	360 mV	300 W /400 W	90 /92%
PM400-18B	48 V	0.1 A	6.25 A	8.34 A	±2%	480 mV	300 W /400 W	90 /93%

Notes:

Change suffix "B" for U-Bracket form to "C" for enclosed form with cover and fan assembly, e.g. PM400-14C.
300 W without moving air or 400 W with 7 CFM forced air provided by user for "B" version, 400 W for "C" version with cover and fan assembly.
Ripple and noise is maximum peak to peak voltage value measured at output within 20 MHz bandwidth, at rated line voltage and output load ranges, and with a 10 μF tantalum capacitor in parallel with a 0.1 μF ceramic capacitor across the output.
All models may be operated at no-load without damage. At no load, output voltage fluctuates beyond 5% due to the burst-mode operation of the control IC in them for energy saving.

Mechanical Specifications

U-bracket Form

Mechanical drawing for the U-bracket form factor of the PM400 series power supply. It shows the overall dimensions: 4.7 inches (119.40 mm) length, 5.5 inches (139.70 mm) width, and 1.15 inches (29.20 mm) height. It indicates mounting holes (A and B) for #6-32 screws and M3x0.5 screws, respectively, with specific locations and counts. Key dimensions like 0.75 inches (19.05 mm) and 0.85 inches (21.50 mm) are also marked.

Enclosed Form

Mechanical drawing for the enclosed form factor of the PM400 series power supply, including a fan. It shows similar overall dimensions to the U-bracket form: 4.7 inches (119.40 mm) length, 5.5 inches (139.70 mm) width, and 1.58 inches (40.20 mm) height. It also indicates mounting holes (A and B) for #6-32 screws and M3x0.5 screws, with specific locations and counts. The presence of a fan assembly is implied by the 'Enclosed Form' designation and the slightly increased height.