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UCC28250PWR Datasheet(PDF) 40 Page - Texas Instruments |
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UCC28250PWR Datasheet(HTML) 40 Page - Texas Instruments |
40 / 53 page UCC28250 SLUSA29C – APRIL 2010 – REVISED JULY 2011 www.ti.com Design Steps Step 1, Power Stage Design The power stage design in this example is standard and the same as that for symmetrical half bridge converter of voltage mode control. From the standard design, these components are determined. This includes Q1 through Q4, C1, C2, CT1, D1 and D2, D3, T1, T2 and T3, and U6. Their design is standard. Also, design associated to current sensing and protection is also standard. This includes CT1, D1, D2, R5 and C5. Step 2, Feedback Loop Design D3 (TLV431) with U6, R6, R9, R10, R12, R13, C11 and C12 are composed of standard type 3 feedback loop compensation network and output voltage set point. Their design is also standard. Table 1. Specifications for the Design Example PARAMETER MIN TYP MAX UNITS VIN Input voltage 36 48 72 VDC VOUT Output voltage 3.3 POUT Outpu power 75 W IOUT Output load current 23 A COUT Load capacitance 5000 µF fSW Switching frequency 150 kHz PLIMIT Over-power limit 150% η Efficiancy at full load 90% Isolation 1500 V 40 Submit Documentation Feedback Copyright © 2010–2011, Texas Instruments Incorporated Product Folder Link(s): UCC28250 |
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