User's Manual

DM38500 EVM Part Descriptions
2-3
Reference
Description
Reference Qty Value/Type Number Manufacturer
Part
Number
R1, R12 2 Short
R10, R36 2 200 Ω, ¼ W
R25, R29,
R27
3 10 kΩ, ¼ W
R13 1 2 kΩ, ¼ W
R14 1 1.5 kΩ, ¼ W
R15, R19 2 3.92 kΩ, ¼ W
R16 1 750 Ω, ¼ W
R17 1 7.5 kΩ, ¼ W
R18, R24 2 392 kΩ, ¼ W
R2, R11 2 1 kΩ, ¼ W
R20 1 22.1 kΩ, ¼ W
R21 1 8.25 kΩ, ¼ W
Resistors
R22, R33 2 562 kΩ, ¼ W
Resistors
R23 1 200 kΩ, ¼ W
R26 1 100 Ω, ¼ W
R28 1 100 kΩ, ¼ W
R30 1 30.1 kΩ, ¼ W
R31 1 33.2 kΩ, ¼ W
R32 1 4.75 kΩ, ¼ W
R34 1 221 kΩ, ¼ W
R35 1 16.2 kΩ, ¼ W
R39 1 1 kΩ, 1 W
R4 1 1 Ω, 1 W, ±5%
R5 1 0.33 Ω, 3 W, ±5%
R6, R7 2 20 Ω, ¼ W
R3 1 51 kΩ, 2 W, 400 V
Transformers
T1 1 8 mH, 10 A, 10.8:1 Cooper CTX08−14226
Transformers
T2 1 560−990 µH, 1:1 gate drive Cooper CTX08−14225
ICs
U4 1
BiCMOS PFC/PWM
combination controller
Texas
Instruments
UCC38500N
ICs
U3 1 Opto-isolator 4N36
X1 3
Thermal pad TO−220
(@ Q1, Q2, D8)
X2 1
Thermal pad TO−247
(@ Q3)
Miscellaneous
X3
4
Screw pan head #4−40 X
7/16 (@Q1, Q2, Q3, D8)
X4 4 Nut #4x40
X5 3
Nylon shoulder washer #4
(@Q1, Q2, D8)
X6 1 Bevel washer #4 (@Q3)
PCB PCB 1 Bare board UCC38500 PCB
Notes:
1) The values of these components are to be determined by the user in accordance with the applica-
tion requirements.
2) Unless otherwise specified, all resistors have a tolerance of ±1%.
3) Capacitor C38 is located at reference designator R38 on the PCB.