DC Output Specifications
Part number 6500769,8007021,A53670-007,AD2POWER

The system is operationally supported with either two or three power modules installed in the power subsystem. The power modules operate with their outputs directly paralleled inside the power subsystem. The power supply modules equally share the total load currents within the limits specified. Equal power sharing of paralleled power supply modules is required to prevent life shortening stress concentration in individual power supply modules. Power sharing is accomplished by actively matching the output currents on the high power outputs. The Current Sharing load deviation is defined as:

Load_Deviation = [(Actual_Load - Mean_ Load)/(Mean Load)] * 100%

The +3.3V, +5V, and +12V output currents of paralleled modules maintain a maximum Load Deviation of + 10% at max rated current. At one-half of the rated current, the maximum Load Deviation is + 20%. At less than one-half of the rated current, the maximum Load deviation can be greater than + 20%.

With a redundant power module configuration (2+1), failure of a power module or removal (hot swap) of a power module does not cause DC output transients in excess of the limits specified. Adding an operational power supply module to the power subsystem or extracting a power supply module from the power subsystem does not cause DC output transients in excess of the limits specified. Power module hot swap is not supported with two or less power module configurations.

The power subsystem has a minimum efficiency of 64% to its DC output pins at maximum load currents and at rated nominal input voltages and frequencies. Refer to the second table for the ratings of the four externally enabled outputs.

Input Voltage Requirements

DC Output Ratings

Notes:

  1. The total combined output power of the +3.3 and +5V channels shall not exceed 120 watts (W).
  2. The total combined output power of the +3.3 and +5V channels shall not exceed 230W.
  3. The total combined output power of the +3.3, +5V and +12V channels shall not exceed 430W.
  4. The total combined output power of the +3.3, +5V and +12V channels shall not exceed 800W.

Maximum current drawn on the +12V output from power subsystem shall not exceed 60 amperes (A) for greater than 10 seconds. The steady state voltage limits and DC output currents of the power subsystem are specified in the flowing tables.

Steady State DC Output Voltage Limits

DC Load Range

Sleep Mode DC Load Range

Absolute Worst Case System Power Budget