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- Texas Instraments 48-V to 3.3-V Forward Converter with Active Clamp Reset Model SLUU178A User's Guide

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10 References
References
Table 2. List of Materials (continued)
QT
REF DESCRIPTION MFR PART NUMBER
Y
R1 1 Resistor, chip, 8.45 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-8451-F
R2 1 Resistor, chip, 57.6 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-5762-F
R3 1 Resistor, chip, 76.8 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-7682-F
R4, R10, R15, R16,
7 Resistor, chip, 2.21 Ω , 1/10 W, 1%, 805 Vishay CRCW0805-2R21-F
R20, R23, R24
R5 1 Resistor, chip, 158 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-1583-F
R6 1 Resistor, chip, 1.82 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-1821-F
R7, R8, R12 3 Resistor, chip, 1 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-1001-F
R9 1 Resistor, chip, 11.8 Ω , 1/10 W, 1%, 805 Vishay CRCW0805-11R8-F
R11 1 Resistor, chip, 26.7 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-2672-F
R13 1 Resistor, chip, 2 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-2001-F
R14 1 Resistor, chip, 10 Ω , 1/10 W, 1%, 805 Vishay CRCW0805-10R0-F
R17, R18 2 Resistor, chip, 499 Ω , 1/10 W, 1%, 805 Vishay CRCW0805-4990-F
R19 1 Resistor, chip, 665 Ω , 1/10 W, 1%, 805 Vishay CRCW0805-6650-F
R21, R22 2 Resistor, chip, 10 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-1002-F
R25 1 Resistor, chip, 51.1 Ω , 1/10 W, 1%, 805 Vishay CRCW0805-51R1-F
R26 1 Resistor, chip, 28.7 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-2872-F
R27 1 Resistor, chip, 12.1 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-1212-F
R28 1 Resistor, chip, 4.99 k Ω , 1/10 W, 1%, 805 Vishay CRCW0805-4991-F
T1 1 Transformer, current sense, 10-A, 1:100, SMD Pulse P8208
T2 1 Transformer, high-frequency planar, planar Pulse PA0810
IC, current mode active clamp PWM controller,
U1 1 TI UCC2891D
SO-16
U2 1 IC, phototransistor, CTR 100%-300%, SOP-4 Vishay SFH690BT
1. UCC2891 Current Mode Active Clamp PWM Controller, Datasheet, (SLUS542)
2. Designing for High Efficiency with the UCC2891 Active Clamp PWM Controller, by Steve Mappus,
Application Note (SLUA299)
18 Using the UCC2891 Active Clamp Current Mode PWM Controller SLUU178A – November 2003 – Revised December 2006
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