Enhance Electronics Co.,LTD _________________________________________________________________________________ Product Specification Active PFC MODEL NO. ENP-3327B This specification describes the requirements of 2 70Watts switching power supply with an FLEX-ATX form-factor , +5V standby voltage, fan control,remote on/off control,dual line input capability and forced air cooling characteristics. ) 1. AC INPUT 1.1 AC input requirements The input voltage, current, and frequency requirements for continuous operation are stated below. Table 1 AC Input Line Requirements Parameter Min Nom. Max Unit Vin(Full range) 90 100-240 265 VACrms 47 63 Hz Vin Frequency 6 3 Arms Iin(Current) Power factor correction (PF)＞0.95 at full load. 1.2 Inrush current regulation 50 A @ 115Vrms o 100 A @ 230Vrms (at 25 C ambient cold start). ) 2. DC OUTPUT 2.1 DC voltage regulation Parameter Range Min Nom. Max Unit +3.3V +/-5％ +3.14 +3.3 +3.47 Volts +5V +/-5％ +4.75 +5 +5.25 Volts +12V1 +/-5％ +11.4 +12 +12.6 Volts +12V2 (Note) +/-5％ +11.4 +12 +12.6 Volts -12V +/-10％ -10.8 -12 -13.2 Volts +5VSB +/-5％ +4.75 +5 +5.25 Volts Note: At +12VDC Peak loading , regulation at the +12VDC output can go to ±10% . AUDIT:___________________CHECK:_____________________DESIGN:_________ 余劉念____ ___ 1 OF 8 2005/12/19 ENP-3300A&B SPEC SPEC REV:2.1 Enhance Electronics Co.,LTD _________________________________________________________________________________ Product Specification 2.2 LOAD RANGE 2.2.1 ENP-3327B(270Watts ) Parameter Min Nom. Max Peak Unit +3.3V 0.5 - 17.0 Amps +5V 0.3 - 18.0 Amps +12V1 1.0 - 7.0 9.0 Amps +12V2 1.0 - 13.0 Amps -12V 0.0 - 0.3 Amps +5VSB 0.0 - 2.5 3.0 Amps Notes: (1) The maximum continuous average DC output power shall not exceed 270W for ENP-3327B. (2) The maximum continuous average load on +5V and +3.3V outputs shall not exceed 120W for ENP-3327B. (3) The maximum peak total DC output power shall not exceed 280W for ENP-3327B. (4) The +5V Standby output shall remain On with the AC input power connected, whether the powersupply DC outputs are disabled (Off) or enabled (On) by the Remote On control signal. (5)When +12V1&+12V2 Load exceed 16A,The min Load of +5V is 1A . (6)Peak Currents may last up to 17 Seconds with not more than one occurrence per minute. 2.3 Output Ripple 2.3.1 Ripple regulation Parameter Ripple&Noise Unit +3.3V 50 mVp-p +5V 50 mVp-p +12V1 120 mVp-p +12V2 120 mVp-p -12V 120 mVp-p +5VSB 50 mVp-p AUDIT:___________________CHECK:_____________________DESIGN:_________ 余劉念____ ___ 2 OF 8 2005/12/19 ENP-3300A&B SPEC SPEC REV:2.1 Enhance Electronics Co.,LTD _________________________________________________________________________________ Product Specification 2.3.2 Definition The ripple voltage of the output shall be measured at the pins of the output connector when terminated in the load impedance specified in Figure 1. Ripple and noise are measured at the connectors with a 0.1uF ceramic capacitor and a 10uF electrolytic capacitor to simulate system loading. Ripple shall be measured under any condition of line voltage, output load, line frequency,operation temperature. 2.3.3 Ripple voltage test circuit Power Supply V out AC Hot 10uF 0.1uF Load V return AC Neutral AC Ground Scope Figure 1. Ripple voltage test circuit General Notes: 1.Load the output with its minimum load current . 2.Connect the probes as shown . 3.Repeat the measurement with maximum load on the output . 2.4 Overshoot Any overshoot at turn on or turn off shall be less than 10% of the nominal voltage value, all outputs shall be within the regulation limit of section 2.0 before issuing the power good signal of section 5.0. 2.5. Efficiency Power supply efficiency typical 78% at normal AC main voltage(230V) and full load on all outputs. Power supply efficiency typical 74% at normal AC main voltage(115V) and full load on all outputs. 270W (loading shown in Amps) Loading . +12V1 .+12V2 .+5V .+3.3V .-12V .+5Vsb . 4 0.3 2.0 Full 11.5 9.4 9 2.6 Remote on/off control When the logic level "PS-ON" is low, the DC outputs are to be enabled. When the logic level is high or open collector, the DC outputs are to be disabled. AUDIT:___________________CHECK:_____________________DESIGN:_________ 余劉念____ ___ 3 OF 8 2005/12/19 ENP-3300A&B SPEC SPEC REV:2.1 Enhance Electronics Co.,LTD _________________________________________________________________________________ Product Specification ) 3.0 PROTECTION 3.1 Over-power protection The power supply will be shutdown and latch off when output power within 110%-165% of rated DC output. 3.2 Over voltage protection The over voltage sense circuitry and reference shall reside in packages that are separate and distinct from the regulator control circuitry and reference.No single point fault shall be able to csuse a sustained over voltage condition on any or all outputs.The supply shall provide latch- mode over voltage protection as defined in table 14 Table 14. Over Voltage Protection Output Min Nom. Max Unit +12V1DC 13.4 15 15.6 Volts +12V2DC 13.4 15 15.6 Volts 5.74 6.3 7 Volts +5VDC 5.74 6.3 7 Volts +5VSB 3.76 4.2 4.3 Volts +3.3VDC 3.3 Short-circuit Protection An output short circuit is defined as any output impedance of less than 0.1 ohms. The power supply shall shut down and latch off for shorting the +3.3 VDC,+5VDC,or+12VDC rails to return or any other rail. Shorts between main output rails and +5VSB shall not cause any damage to the power supply.The power supply shall either shut down and latch off or fold back for shorting the negative rails.+5VSB must be capable of being shorted indefinitely,but when the short is removed, the power supply shall recover automatically or by cycling PS_ON#.The power supply shall be capable of withstanding a continuous short-circuit to the output without damage or overstress to the unit (for example,to components, PCB traces, and connectors) under the input conditions specified in section 0 . NOTES: +5Vsb will be auto-recovery when the fault removed. 3.4 No-load operation No damage or hazardous condition should occur with all the DC output connectors disconnected from the load.The power supply may latch into the shutdown state. 3.5 Over current protection Overload currents applied to each tested output rail cause the output to trip before reaching or exceeding 240VA. For testing pruposes,the overloaded currents should be ramped at a minimum rate of 10 A/s starting from full load . AUDIT:___________________CHECK:_____________________DESIGN:_________ 余劉念____ ___ 4 OF 8 2005/12/19 ENP-3300A&B SPEC SPEC REV:2.1 Enhance Electronics Co.,LTD _________________________________________________________________________________ Product Specification 4.1 Signal timing drawing Figure 2. is a reference for signal timing for main power connector signals and rails. Figure 2. PS-OK Timing Sequence (1) Rise time (0.2ms≦T2≦20ms) (2) Power good signal turn on delay time (100ms