© 2011 fairchild semiconductor corporation 1 febfsb127h_t001 • rev. 1.0.0 user guide for febfsb127h_t001 evaluation board fsb127h 100khz power switch for atx standby 16w featured fairchild product: fsb127h direct questions or comments about this evaluation board to: “worldwide direct support” fairch...
© 2011 fairchild semiconductor corporation 2 febfsb127h_t001 • rev. 1.0.0 table of contents 1. Overview ................................................................................................................................... 3 2. Board configuration ..........................................
© 2011 fairchild semiconductor corporation 3 febfsb127h_t001 • rev. 1.0.0 this user guide supports the 16w evaluation board for atx standby using fsb127h. It should be used in conjunction with the fsb127h datasheet as well as fairchild’s application notes and technical support team. Please visit fai...
© 2011 fairchild semiconductor corporation 4 febfsb127h_t001 • rev. 1.0.0 3. Schematic figure 2. Evaluation board schematic.
© 2011 fairchild semiconductor corporation 5 febfsb127h_t001 • rev. 1.0.0 4. Pcb layout figure 3. Evaluation board pcb layout.
© 2011 fairchild semiconductor corporation 6 febfsb127h_t001 • rev. 1.0.0 5. Test results 5.1. Brown-in / brownout 5.1.1. Test condition decrease input ac voltage gradually and measure the turn-off threshold. After dc power off, increase input voltage and measure the recovery threshold. 5.1.2. Test ...
© 2011 fairchild semiconductor corporation 7 febfsb127h_t001 • rev. 1.0.0 5.4. Dc output rise time 5.4.1. Test condition load: maximum load and minimum load. Dc-output rise time: 20ms, maximum. 5.4.2. Measured waveforms figure 4. 90v / 60hz maximum load figure 5. 90v / 60hz minimum load figure 6. 26...
© 2011 fairchild semiconductor corporation 8 febfsb127h_t001 • rev. 1.0.0 5.5. Dc transient response 5.5.1. Test condition from 10–90% of maximum and minimum load, with a 2.5a/μs slew rate; 5ms/5ms. 5.5.2. Measured waveforms figure 8. 90v ac / 60hz figure 9. 264v ac / 50hz 5.6. Ripple and noise 5.6....
© 2011 fairchild semiconductor corporation 9 febfsb127h_t001 • rev. 1.0.0 5.7. Capacitive load 5.7.1. Test condition output capacitive load = 12000μf 5.7.2. Measured waveforms 90v / 60hz maximum load 90v / 60hz minimum load 264v / 50hz maximum load 264v / 50hz minimum load.
© 2011 fairchild semiconductor corporation 10 febfsb127h_t001 • rev. 1.0.0 5.8. Power saving 5.8.1. Test condition the input wattage is the input wattage is 5.8.2. Test result fsb127h input watts output watts a. When v in = 230v ac , with 0.5w loading 0.713w 0.5w when v in = 240v ac , with 0.5w load...
© 2011 fairchild semiconductor corporation 11 febfsb127h_t001 • rev. 1.0.0 5.10. Short-circuit protection 5.10.1. Test condition in the event of a short circuit on any dc output, the power supply should be protected from damage. 5.10.2. Test result 90v / 60hz 264v / 50hz minimum load pass pass maxim...
© 2011 fairchild semiconductor corporation 12 febfsb127h_t001 • rev. 1.0.0 5.12. Over-power protection 5.12.1. Test condition an over-current from the output return line does not damage the power supply and the olp protection is enabled. 5.12.2. Test result input voltage 90v 115v 132v 180v 230v 264v...
© 2011 fairchild semiconductor corporation 13 febfsb127h_t001 • rev. 1.0.0 6. Bill of materials component qty part no. Manufacturer reference jumper wire 0.8Ø (mm) 5 jp1, jp2, jp3, jp4, jp5 resistor 1206 0Ω ±5% 2 r19, r20 resistor 1206 100kΩ ±5% 2 r8, r22 resistor 1206 20kΩ ±1% 3 r13, r14, r18 resis...
© 2011 fairchild semiconductor corporation 14 febfsb127h_t001 • rev. 1.0.0 7. Transformer 7.1. Transformer specification ei - 22 n p /2 n 5v n a 1 2 3 4 5 6 10 n p /2 core: ei-22 (ae=37.5mm 2 ) bobbin: ei-22 figure 21. Transformer specification table 1. Winding specifications pins (s → f) wire turns...
© 2011 fairchild semiconductor corporation 15 febfsb127h_t001 • rev. 1.0.0 8. Revision history rev. Date description 0.0.1 11/10/11 initial release warning and disclaimer replace components on the evaluation board only with those parts shown on the parts list (or bill of materials) in the users’ gui...
