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FSDM0365RN Datasheet(PDF) 14 Page - Fairchild Semiconductor |
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FSDM0365RN Datasheet(HTML) 14 Page - Fairchild Semiconductor |
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14 / 20 page  FSDH321, FSDL321 14 10W PC Auxiliary Power, 150~375VDC Input Power supply: It shows a auxiliary power for PC. Efficiency at 10W, 150/ 375VDC is ≥70%. The PC application has the standard of standby power con- sumption, under 1W at the output load, 0.5W and height input voltage, 230VAC. For this the FSDH321 also has the burst operating function like the any other green mode FPS like FSDM0265RN or FSDM0365RN and so on. This skill reduces the MOSFET switching numbers and power MOS- FET switching loss. This design takes advantage of self pro- tection without external components and high switching frequency, 100kHz. The frequency makes using a small size transformer core possible. The EE16 or EE1625 can be used for 10W application. This is achieved by preventing the green FPS from switching when the input voltage goes below a level needed to main- tain output regulation, and keeping it off until the input volt- age goes above the under-voltage threshold, when the AC is turned on again. For example with the resistor, R101, 680k Ω, the threshold voltage is around 150VAC(210VDC) at the room temperature. Leakage inductance clamping is provided by R102 and C101, keeping the DRAIN voltage below 650 V under all conditions. And R102 dissipates power to prevent rising of DRAIN Voltage caused by leakage inductance. The fre- quency modulation feature of FSDH321 allows the circuit shown to meet CISPR2AB with simple EMI filtering. The secondary is rectified and smoothed by D201. Similarly D102 and D103 are also rectifiers for main power control IC and FSDH321 respectively. The 5V output voltage require two capacitors in parallel to meet the ripple current require- ment. Switching noise filtering is provided by L201. The output is regulated by the reference (TL431) voltage in sec- ondary. It is sensed via R203 and R204. Resistor R201 pro- vides bias for TL431 and R202 sets the overall DC gain. R2012, C202 and R203 provide loop compensation. Typical application circuit 1. PC Auxiliary Power Circuit (10W Output Power) T1 EE1625 7 10 D201 SB360 C201 1000uF 16V C203 470uF 16V L201 10uH 5V (+/-5%) 2A C101 10nF 630V 1 2 4 5 R102 100kΩ Ω Ω Ω 1W D101 UF 4007 C104 22nF C103 10uF 50V D103 1N4937 R104 10Ω Ω Ω Ω R202 330Ω Ω Ω Ω R201 1kΩ Ω Ω Ω R203 2kΩ Ω Ω Ω C202 100nF R204 2kΩ Ω Ω Ω PC301 H11A817A IC201 KA431 3 Vfb Vcc Drain GND 6 140~375 VDC INPUT IC101 FSDx321 6,7,8 1 2 3 R103 10Ω Ω Ω Ω D102 1N4937 C102 47uF 50V M Vcc C301 2.2nF Vstr 5 R101 680kΩ Ω Ω Ω 1W 10W PC Auxiliary Power Circuit |
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Similar Description - FSDM0365RN |
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