Matrix Power Company
MB xxx-3U series
Specification Document
TABLE OF CONTENTS
1. Scope
2. Applicable document:
3. Electric specification:
3.1 AC input requirement:
3.1.1 AC input requirement
3.1.2 Over current protection
3.1.3 Inrush current limiting
3.1.4 Input under voltage
3.1.5 Electrical fast transient/burst
3.2 DC output requirements:
3.2.1 DC voltage regulation
3.2.2 remote sense
3.3 power distribution:
3.3.1 Output requirement
3.3.2 Efficiency
3.3.3 Output ripple and noise
3.3.4 Output transient response
3.3.5 +5Vdc and +3.3Vdc power sequencing
3.3.6 voltage hold-up time
3.4 Timing / housekeeping / control
3.4.1 Power_OK
3.4.2 Power_ON
3.4.3 +5Vsb
3.4.4 Power ON time
3.4.5 Rise time
3.4.6 Overshoot at turn_on/turn_off
3.4.7 Reset after shutdown
3.4.8 +5vsb at power down
3.5 Output protection:
3.5.1 Over voltage protection
3.5.2 Short circuit protection
3.5.3 No load operation
3.5.4 Over current protection
3.5.5 Over load protection
3.5.6 Output bypass
2
4. Mechanical requirement:
4.1 Label and marking
4.2 Physical dimension
4.3 Air flow / fan
4.4 Connector
5. Environment requirement
5.1 Environment requirement
5.2 Thermal shook (shipping)
5.3 Humidity
5.4 Altitude
5.5 Mechanical shock
5.6 Vibration
6. Electromagnetic compatibility
7. Reliability
7.1 Mean time between failure (MTBF)
7.2 Compatibility
7.3 Safety requirement
3
1. S
COPE
:
This document outlines the power supply specification of MB-3Useries.
2. Applicable Documents:
See ATX Specification Version 2.03/_12V version 2.3 and Intel ATX Power Supply Design
Guide EPS/SSI Version 2.91.
3. Electric specification:
The electrical requirements that follow are to be met over the environmental ranges specified in
Section 5 unless otherwise noted.
3.1 AC input requirement:
3.1.1 AC input requirement:
a. The power supply shall be capable of supplying full rated output power over two
input voltages ranges rated 115Vac and 230Vac RMS nominal at 0℃ ~ 50℃.
b.
Input voltage range Input frequency range Selecting
85Vac ~ 135Vac 47Hz ~ 63Hz Select switch
170Vac ~ 265Vac 47Hz ~ 63Hz Select switch
c. Auto range: **option.
d. PFC function **optional
*For Active PFC Vin=100~240Vac full-range, PF=0.95min.
*For Passive PFC Vin=115/230Vac by-switch, PF=0.85 typ.
3.1.2 AC over current Protection:
The power supply shall incorporate primary fusing for input overcurrent protection. Fuses
should be slow-blow type or equivalent to prevent nuisance trips.
3.1.3 Inrush Current Limiting:
Maximum inrush current from power-on (with power on at any point on the AC Sine) and
including, but not limited to, three line cycles, shall be limited to a level below the surge
rating of the input line cord, AC switch if present, bridge rectifier, fuse, and EMI filter
components. Repetitive ON/OFF cycling of the AC input voltage should not damage the
power supply or cause the input fuse to blow.
3.1.4 Input under voltage:
The power supply shall contain protection circuitry such that the application of an input
voltage below the minimum specified in Section 3.1, Table 1, shall not cause damage to
the power supply.
3.1.5 Electrical fast transient/burst:
No unsafe operation is allowed under any condition. No user-noticeable performance
degradation up to +- 1 kV Mains, +- 500V Signal Cable, is allowed. Automatic or manual
recovery is allowed for other conditions.
4
3.2 DC Output Requirements
3.2.1 DC Voltage Regulation
The DC output voltages shall remain within the regulation ranges shown in Table 3 when
measured at the load end of the output connectors under all line, load, and environmental
conditions. The voltage regulation limits shall be maintained under continuous operation
for a period of time equal to or greater than the MTBF specified in Section 7.2 at any
steady state temperature and operating conditions specified in Section 5.
Table 3: DC Output Voltage Regulation
Output Range Min. Nom. Max. Unit
+12Vdc ±5% +11.40 +12.00 +12.60 Volts
+5Vdc +5-4% +4.80 +5.00 +5.25 Volts
+3.3Vdc +5-4% +3.17 +3.30 +3.46 Volts
-5Vdc ±5% -4.75 -5.00 -5.25 Volts
-12Vdc ±10% -11.40 -12.00 -13.20 Volts
+5Vsb ±5% +4.75 +5.00 +5.25 Volts
3.2.2 Remote Sensing
a. For the +12V, +5 V and +3.3 V, the power supply shall use remote sensing wires to
achieve regulation at the output connector to compensate for voltage drop of cable,
connector, and PCB trace. If the remote connection is lost to any of these outputs, then
internal resistive feedback causes the power supply to regulate and prevent OVP.
b. The power supply should have remote sense return (Returns) to regulate out ground drops
for all output voltages, +12V, +3.3V, and +5V. The power supply will uses remote sense
(+3.3Vs, +5Vs, +12Vs) to regulate out drops in the system for the +3.3V, and +5V
outputs. Remote sense must be able to regulate out a minimum of 250mV of drop on the
+3.3V and +5V outputs. The remote sense return (Returns) must be able to regulate out a
minimum of 100mV of drop in the power ground return. The current in any remote sense
line shall be less than 10mA to prevent voltage sensing errors. The power supply must
operate within specification over the full range of voltage drops from the power supply's
output connector to the remote sense points.
3.3 Power Distribution:
5
Loading...