HP dc73 Technical Reference Guide: HP Compaq dc7800 Series Business Desktop Co - Page 84
CMT Power Distribution
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Power and Signal Distribution 7.2.3 CMT Power Distribution The CMT form factor uses a power supply unit internal to the system chassis. Figure 7-4 shows the block diagram for power generation in the CMT. Front Bezel Power Button Power On System Board CPU, slots, Chipsets, Logic, & Voltage Regulators +3.3 VDC 5 AUX +5 VDC +12 VDC +12 VccP Fan PS On Spd [1] -12 VDC +3.3 VDC +5 VDC +12 VDC Drives 90 - 264 VAC Power Supply Unit NOTE: [1] Not present on CMT. Figure 7-4. CMT Power Generation, Block Diagram Table 7-3 lists the specifications for the 365-watt power supply used in the CMT form factor. Table 7-3. CMT 365-Watt Power Supply Unit Specifications Input Line Voltage: 115-230 VAC (auto-ranging) Line Frequency Input (AC) Current +3.3 VDC Output +5.08 VDC Output +5.08 AUX Output +12 VDC Output +12 VDC Output (Vcpu) -12 VDC Output Range or Tolerance Min. Current Max. Surge Loading [1] Current Current [2] 90-264 VAC 47-63 Hz -+ 4 % + 3.3 % + 3.3 % + 5 % + 5 % + 10 % ---0.10 A 0.30 A 0.00 A 0.20 A 0.00 A 0.00 A --6.0 A 24.0 A 19.0 A 3.00 A 12.0 A 14.5 A 0.15 A ---24.0 A 19.0 A 3.00 A 14.5 A 17.5 A 0.15 A Max. Ripple ---50 mV 50 mV 50 mV 120 mV 200 mv 200 mV NOTES: Total continuous output power should not exceed 365 watts. Maximum surge power should not exceed 385 watts.. Maximum combined power of +5 and +3.3 VDC is 160 watts. [1] Minimum loading requirements must be met at all times to ensure normal operation and specification compliance. [2] Maximum surge duration for +12Vcpu is 1 second with 12-volt tolerance +/- 10%. 7-4 www.hp.com Technical Reference Guide