Texas Instruments SIMPLE SWITCHER® 1.35A Boost Regulator Evaluation Module LM2698EVAL LM2698EVAL Datenbogen
Produktcode
LM2698EVAL
Maximum Output Current
Table 1. Bill of Materials (BOM)
Component
Value
Description
Model Number
C
OUT
10 µF
Output Capacitor
TMK432BJ106MM (Taiyo Yuden)
C
IN
22 µF
Input Capacitor
LMK432BJ226MM (Taiyo Yuden)
C
C
4.7nF
Compensation Capacitor
VJ0805Y472MXAAT (Vishay)
C
BYP
0.1 µF
Bypass Capacitor
VJ0805Y104KXAAT (Vishay)
D
1A, 20 V
Schottky Power Diode
MBRM120LT3 (ON-Semiconductor)
L
10 µH
Power Inductor
CDRH6D38-100 (Sumida)
R
C
24.9k
Compensation Resistor
CRCW 0805 2492 FRT1 (Vishay)
R
FB1
30.1k
Top Feedback Resistor
CRCW 0805 3012 FRT1 (Vishay)
R
FB2
3.48k
Bottom Feedback Resistor
CRCW 0805 3481 FRT1 (Vishay)
Table 2. Jumper Settings
Jumper
Setting
Description
J1
600 kHz
600 kHz switching frequency
1.25 MHz
1.25 MHz switching frequency
J2
Run
LM2698 is regulating
SD
LM2698 is shutdown
3
Maximum Output Current
The current limit of the LM2698 is with respect to the switch current. This means that the maximum output
current to the load is dependent on duty cycle. With a fixed V
current to the load is dependent on duty cycle. With a fixed V
OUT
, the maximum output current will be a
function of V
IN
, as shown in
.
Figure 2. Maximum Output Current vs Input Voltage
3
SNVA040C – September 2001 – Revised April 2013
AN-1202 LM2698 Demo Board
Copyright © 2001–2013, Texas Instruments Incorporated