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ZSPM4523 데이터시트(PDF) 17 Page - Integrated Device Technology

부품명 ZSPM4523
상세설명  High-Efficiency Solar PV MPPT Regulator
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제조업체  IDT [Integrated Device Technology]
홈페이지  http://www.idt.com
Logo IDT - Integrated Device Technology

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ZSPM4523 Datasheet
© 2016 Integrated Device Technology, Inc.
17
January 29, 2016
4
Application Circuits
4.1.
Typical Application Circuits
Figure 4.1
Application Circuit
GND
EN
SW
NFLT
VOUT
SCL
PGND
COUT
LOUT
RSENSE
VIN
SDA
Photovoltaic Cells
VSENSE
Super Cap
RPULLUP
(optional)
VDD
RPULLUP
(optional)
VDD
CIN
VDD
CVdd
ZSPM4523
4.2.
Selection of External Components
Note that the internal compensation is optimized for a 4.7µF output capacitor (COUT) and a 4.7µH output inductor
(LOUT). Table 1.3 provides recommended ranges for most of the following components.
4.2.1.
COUT Output Capacitor
To keep the output ripple low, a low ESR (less than 35m
Ω) ceramic capacitor is recommended for the 4.7µF
output filter capacitor. The ESR should not exceed 100m
Ω.
4.2.2.
LOUT Output Inductor
For best performance, an inductor with a saturation current rating higher than the maximum VOUT load requirement
plus the inductor current ripple should be used for the 4.7µH output filter inductor.
4.2.3.
CIN Bypass Capacitor for Input from Photovoltaic Source
For best performance, a low ESR ceramic capacitor should be used for the 10µF input supply bypass capacitor. If
it is not a low ESR ceramic capacitor, a 0.1µF ceramic capacitor should be added in parallel to CIN.
4.2.4.
CVDD Bypass Capacitor for VDD Internal Reference Voltage Output
For best performance, a low ESR ceramic capacitor should be used for the100nF bypass capacitor from the VDD
pin to ground.


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