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U4
Section
ESP32
flexible, but 2m is suggested: 9.2.1.2.7
12
Output capacitor analysis: should use a ceramic and bulk cap https://cdn2.flux...
8
see section 9.2.1.2.2 for FB resistor formula: https://cdn2.flux.ai/flux-commen...
3
Online calculator: https://www.wolframalpha.com/input?i=system+equation+calculat...
15
table 9-1, section 9.2.1.2.8
13
see section 9.2.1.2.1 for ACUV/ACOV divider forumlae https://cdn2.flux.ai/flux-...
4
https://cdn2.flux.ai/flux-comment-files/files/commentFileId-fe36556460cb0f8c0fc5...
10
Inductor selection notes: https://cdn2.flux.ai/flux-comment-files/files/comment...
6
battery sense resistor must be 5m ohm
7
for ripple current less than 0.15A, what should my switching frequency be for my...
16
https://cdn2.flux.ai/flux-comment-files/files/commentFileId-b30e39a390d5dcd00a56...
18
See table 8-2 for Rfsw choices: https://cdn2.flux.ai/flux-comment-files/files/c...
5
choose a battery charging IC for a 13s 5p li-ion battery
1
https://cdn2.flux.ai/flux-comment-files/files/commentFileId-fe36556460cb0f8c0fc5...
9
https://cdn2.flux.ai/flux-comment-files/files/commentFileId-4514849572bd679f0b6c...
11
table 9-1, section 9.2.1.2.8
14
Make a thermistor here
17
PACK+
BREG
REGIN
SCL
SDA
R43
Resistance
300 Ω
3V3
5V
48V
BAT-
C43
Capacitance
1uF
D6
Q9

48V Solar Li-Ion Charger

48V Solar Li-Ion Charger thumbnail
A solar charging PCB for a 13S 5P lithium-ion battery pack.
Charging design parameters:
  • Input voltage range: 40V to 56V
  • Battery voltage range: 39V to 54.6V
  • Input current limit: 12 A
  • Fast-charge current limit: 10 A
  • Switching frequency: 350kHz

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$5.78–$6.11

Digi-Key

$8.24–$8.33

LCSC

$14.69–$14.85

Mouser

$18.80

Verical

$9.23–$10.12

Controls