Texas Instruments Evaluation Module for Single-Chip Charger and DC/DC Converter IC for Portable Applications BQ25017EVM BQ25017EVM Datenbogen
Produktcode
BQ25017EVM
www.ti.com
1.6
Recommended Output Inductor and Capacitor Values of the DC-DC Converter
Recommended Output Inductor and Capacitor Values of the DC-DC Converter
Output
DC-DC Converter
Converter Load
Output
Inductor Peak
Part #
Capacitance, C
Output Voltage
Current (mA)
Inductance, L (
μ
H)
Current (mA)
(
μ
F)
20
292–620
0.33–0.169
26–23
bq25010/15
0.7 V
(1)
50
220
0.47
57.5
100
120
0.82
115
20
120
0.82
23
bq25011
or
or
3.3 V
(2)
50
47
2.2
57.5
bq25010/15
100
22
4.7
115
20
175
0.56
23
bq25012/17
or
or
1.8 V
(3)
50
68
1.5
57.5
bq25010/15
100
33
3.3
115
(1)
The product of output inductance L and capacitance C is recommended to be around 10
-10
to better match the built-in
compensator.
(2)
The current ripple is recommended to be about 30% to achieve a high efficiency. Therefore, the inductance can be adjusted
according to the typical load current.
according to the typical load current.
(3)
For bq25010, the output voltage is variable over a wide range. It may require a higher inductance for the worst case to maintain
30% current ripple. Depending on specific applications, an inductance with up to 60% current ripple may be acceptable.
30% current ripple. Depending on specific applications, an inductance with up to 60% current ripple may be acceptable.
SLUU214A – December 2004 – Revised June 2007
Introduction
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