Texas Instruments HPA070 - Manual (Page 15)

SLUU186 − March 2004
15 TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070)
8 List of Materials
Table 1 lists the parts values of the evaluation board. These values can be modified to meet the application
requirements.
Table 1. TPS40055EVM−001 (HPA070) List of Materials
REFERENCE
DESIGNATOR
QTY DESCRIPTION SIZE MFR PART NUMBER
C1, C4 2 Capacitor, ceramic, 470 pF, 50 V, X7R, 10% 805 Vishay VJ0805Y471KXAAT
C12, C14 2 Capacitor, ceramic, 22 µ F, 16 V, X5R, 20% 1812 TDK C4532X5R1C226MT
C15 1 Capacitor, ceramic, 47 µ F, 6.3 V, X5R, 20% 1812 TDK C4532X5R0J476MT
C16, C17(1) 2 Capacitor, POSCAP, 470 µ F, 4 V, 10 m Ω , 20% 7343 (D) Sanyo 4TPD470M
C2, C8, C10,
C11, C18
5 Capacitor, ceramic, 0.1 µ F, 25 V, X7R, 10% 805 Vishay VJ0805Y104KXXAT
C3 1 Capacitor, ceramic, 2.2 nF, 50 V, X7R, 10% 805 Vishay VJ0805Y222KXAAT
C5 1 Capacitor, ceramic, 5.6 nF, 50 V, X7R, 10% 805 Vishay VJ0805Y562KXAAT
C6,C13 2 Capacitor, ceramic, 4.7 nF, 50 V, X7R, 10% 805 Vishay VJ0805Y472KXAAT
C7 1 Capacitor, ceramic, 100 pF, 50 V, NPO, 10% 805 Vishay VJ0805A101KXAAT
C9 1 Capacitor, ceramic, 1 µ F, 16−V, X5R, 10% 805 TDK C2012X5R1C105KT
D1 1 Diode, switching, 10 mA, 85 V, 350 mW SOT23 Vishay−Liteon BAS16
D2 1 Diode, schottky, 3 A, 40 V SMC IR 30BQ040
J1, J2 2 Terminal block, 4-pin, 15 A, 5.1 mm 0.80 x 0.35 OST ED2227
L1(1) 1 Inductor, SMT, 1.7− µ H, 22.3 A, 1.8 m Ω 0.512 x 0.512 Coiltronics HC1−1R7
Q1(1) 1 MOSFET, N−channel, VDS 30 V, RDS 6 m Ω , ID 30 A LFPAK Hitachi HAT2168H
Q2(1) 1 MOSFET, N−channel, VDS 30 V, RDS 4.2 m Ω , ID 40 A LFPAK Hitachi HAT2167H
R1 1 Resistor, chip, 1 k Ω , 1/10−W, 1% 805 Std Std
R10 1 Resistor, chip, 0 Ω , 1/10−W, 5% 805 Std Std
R11 1 Resistor, chip, 0 Ω , 1/10−W, yy% 805 Std Std
R12 1 Resistor, chip, 20 Ω , 1/10−W, 5% 805 Std Std
R2 1 Resistor, chip, 165 k Ω , 1/10−W, 1% 805 Std Std
R3 1 Resistor, chip, 5.49 k Ω , 1/10−W, 1% 805 Std Std
R4 1 Resistor, chip, 243 k Ω , 1/10−W, 1% 805 Std Std
R5 1 Resistor, chip, 10 k Ω , 1/10−W, 1% 805 Std Std
R6 1 Resistor, chip, 71.5 k Ω , 1/10−W, 1% 805 Std Std
R7 1 Resistor, chip, 8.66 k Ω , 1/10−W, 1% 805 Std Std
R8 1 Resistor, chip, 226 Ω , 1/10−W, 1% 805 Std Std
R9 1 Resistor, chip, 16.2 k Ω , 1/10−W, 1% 805 Std Std
TP1, TP4,
TP5, TP7, TP9
5 JACK, test point, red Farnell 240−345
TP2, TP3,
TP6, TP10
4 JACK, test point, black Farnell 240−333
TP8 1 Adaptor, 3.5 mm probe clip 0.2 Tektronix
131−4244−00 or
131−5031−00
U1 1 Wide input synchronous buck controller PWP16 TI TPS40055PWP
−− 1 PCB, 2.85” x 2” x .062 In Std HPA070