Texas Instruments AN-1650 LM34919, Руководство пользователя, Страница: 5 / 11

FB
SW
R4
BST
VCC
ISEN
SGND
VIN
R1
43.2k
SS
RTN
Gnd
D1
A1
A2
On
Timer
Minimum
Off
Timer
Logic
Regulation
Comparator
B3
A3
Current Limit
Detect
D3
C3
0.39
:
C1
IN
Gnd
C2
R5
1 P F
8
V to
40V
RON/SD
C6
0.022 P
F
0.1 P
F
C3 1 P F
0.1
P
F
C4
B1
V
IN
V
OUT
C10
C5
D1
D2
C1
2.49k
R3
2.49k
R2
C9
P F 10 P F 10
5V
LM34919
15 P H L1 R6 0
:
C8 C7
2.5V
0.022
P F
O
U
T
PU
T
SW
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Minimum Load Current
Figure 5. Complete Evaluation Board Schematic
Table 1. Bill of Materials
Item Description Mfg., Part Number Package Value
C1, C2 Ceramic Capacitor TDK C3216X7R1H105M 1210 1.0 µF, 50V
C3 Ceramic Capacitor TDK C1608X7R1H104K 0603 0.1 µF, 50V
C4 Ceramic Capacitor TDK C1608X7R1H104K 0603 0.1 µF, 50V
C5, C6 Ceramic Capacitor TDK C1608X7R1H223K 0603 0.022 µF, 50V
C7, C8 Ceramic Capacitor TDK C3216X7R1C106K 1206 10 µF, 16V
C9 Ceramic Capacitor Unpopulated 0603
C10 Ceramic Capacitor Unpopulated 0603
D1 Schottky Diode Zetex ZLLS2000 SOT23-6 40V, 2.2A
L1 Power Inductor Bussman DR73-150 7.6 mm x 7.6 mm 15 µH, 1.8A
R1 Resistor Vishay CRCW06034322F 0603 43.2 k Ω
R2, R3 Resistor Vishay CRCW06032491F 0603 2.49 k Ω
R4 Resistor Panasonic ERJ3RQFR39 0603 0.39 Ω
R5 Resistor Unpopulated 0603
R6 Resistor Vishay CRCW08050000Z 0805 0 Ω Jumper
U1 Switching Regulator LM34919 10 Bump DSBGA
5 SNVA250A – June 2007 – Revised April 2013 AN-1650 LM34919 Evaluation Board
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