LM3478EVAL National Semiconductor, LM3478EVAL Datasheet

no-image

LM3478EVAL

Manufacturer Part Number
LM3478EVAL
Description
BOARD EVALUATION LM3478
Manufacturer
National Semiconductor
Datasheets

Specifications of LM3478EVAL

Main Purpose
DC/DC, Step Up
Outputs And Type
1, Non-Isolated
Voltage - Output
12V
Current - Output
1.5A
Voltage - Input
4.5 ~ 5.5V
Regulator Topology
Boost
Board Type
Fully Populated
Utilized Ic / Part
LM3478
Lead Free Status / RoHS Status
Not applicable / Not applicable
Power - Output
-
Frequency - Switching
-
© 2002 National Semiconductor Corporation
LM3478/LM3488 Evaluation
Board
Introduction
The LM3478 and LM3488 are current mode, low side N
channel FET controllers. They can utilized in numerous con-
figurations including a Boost, Flyback or SEPIC (Single
Ended Primary Inductor Converter). This evaluation board
demonstrates the flexibility of the LM3478 in a boost topol-
ogy. The operating conditions for the evaluation board are
listed below:
Component
C
C
C
C
R
R
R
R
C
C
R
R
C
Q1
OUT1
U1
D1
R
L1
OUT
SEN
SEN
BYP
FB1
FB2
DR
C1
C2
S1
FA
IN
C
Tantalum, 220µF/10V
Tantalum, 150µF/16V
AN200235
No Connect
No Connect
0.01µF/25V
0.1µF/25V
0.1µF/25V
30V/11A
100V/3A
84.5kΩ
0.010Ω
40.2kΩ
3.3µH
Value
10kΩ
604Ω
1kΩ
0Ω
FIGURE 1. Circuit Diagram
TABLE 1. Bill of Materials
National Semiconductor
Application Note 1204
Chance Dunlap
July 2002
4.5V ≤ V
V
0A ≤ I
The circuit and bill of materials for this design are given
below:
OUT
LM3478
DO3316P-332 (Coilcraft)
FDS6690A (Fairchild)
MBRS340T3 (Motorola)
595D227X9010R2 (Sprague)
595D157X9016R2 (Sprague)
VJ0805Y104KXXA (Vitramon)
VJ0805Y104KXXA (Vitramon)
VJ0805Y103KXXA (Vitramon)
CRCW08058452 (Vitramon)
CRCW08051002 (Vitramon)
CRCW08051001 (Vitramon)
(Dale, 1%, 1W, R01F, 2512)
CRCW0805600R0 (Vitramon)
CRCW08056040 (Vitramon)
CRCW08054022 (Vitramon)
OUT
= 12V
IN
≤ 1.5A
≤ 5.5V
Model Number
www.national.com
20023502

Related parts for LM3478EVAL

LM3478EVAL Summary of contents

Page 1

... C SEN R FB1 R FB2 SEN © 2002 National Semiconductor Corporation National Semiconductor Application Note 1204 Chance Dunlap July 2002 4.5V ≤ V ≤ 5. 12V OUT 0A ≤ I ≤ 1.5A OUT The circuit and bill of materials for this design are given below: FIGURE 1. Circuit Diagram TABLE 1 ...

Page 2

Performance Benchmark data has been taken from the evaluation board using the LM3478. Figure 2 shows an efficiency measure- ment taken at the maximum load of 1.5A with Vin at 5V. FIGURE 2. Efficiency vs Load The open loop frequency ...

Page 3

Layout Fundamentals (Continued) FIGURE 4. Front Side FIGURE 5. Back Side 3 20023504 20023505 www.national.com ...

Page 4

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

Related keywords