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SmallKatBatteryCharger

SmallKatMQP·SmallKatBatteryCharger

SmallKatBatteryCharger PCB layout, top view — open source STM32 board by SmallKatMQP

About the SmallKatBatteryCharger PCB

SmallKatBatteryCharger is an open source STM32 PCB design by SmallKatMQP, published on GitHub. It is a 4-layer board measuring 50 × 50 mm, with 58 components from 35 distinct parts.

Its main chip is the STM32L432KBUx, from the STM32 family. Other key parts include the CSD87312Q3E, BQ24715, BQ29200 and MIC5504-3.3YM5. By type, the board carries 23 resistors, 14 capacitors, 7 connectors, 5 ICs, 5 diodes and 3 transistors.

It belongs with the power & battery designs in this gallery.

Main components on the SmallKatBatteryCharger

CSD87312Q3ESTM32L432KBUxBQ24715BQ29200MIC5504-3.3YM5

SmallKatBatteryCharger bill of materials (BOM)

58 components, 35 distinct parts.

QtyPartRefs
1
CSD87312Q3E
U1
1
STM32L432KBUx
U2
1
BQ24715
U3
1
BQ29200
U4
1
MIC5504-3.3YM5
U6
2
BUK7M33-60EX
Q1, Q2
1
DMP3013SFV
Q4
3
Conn_01x02_Male
J1, J6, J7
1
Conn_01x04_Male
J2
1
Conn_01x04_Male
J3
1
Conn_01x03_Male
J4
1
Conn_01x06_Male
J5
2
D_Schottky_ALT
D1, D2
3
LED
D3, D4, D5
1
2.2uH
L1
5
0.1uF
C1, C7, C9, C10, C12
1
47nF
C2
4
1uF
C3, C8, C15, C16
2
10uF
C4, C5
1
200uF
C6
Show 15 more
QtyPartRefs
1
0.33uF
C11
6
10k
R1, R5, R8, R10, R14, R19
1
430k
R2
1
66.5k
R3
2
4k
R4, R6
2
10m
R7, R16
1
15
R9
1
160
R11
1
260
R12
1
100k
R13
1
6.5k
R15
1
100
R17
1
100
R18
1
10
R20
3
330
R25, R26, R27

SmallKatBatteryCharger design files

The KiCad project lives in the SmallKatMQP/SmallKatBatteryCharger repository on GitHub; these links point at the commit this page was built from.

SmallKatBatteryCharger: common questions

What microcontroller does the SmallKatBatteryCharger use?

The SmallKatBatteryCharger is built around the STM32L432KBUx, from the STM32 family.

How big is the SmallKatBatteryCharger PCB?

The SmallKatBatteryCharger measures 50 × 50 mm, has 4 copper layers and is 1 mm thick.

How many components are on the SmallKatBatteryCharger?

58 components, from 35 distinct parts. The full bill of materials is listed on this page.

Where can I download the SmallKatBatteryCharger design files?

From the SmallKatMQP/SmallKatBatteryCharger repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the SmallKatBatteryCharger design in my own project?

The repository has no license, so all rights stay with SmallKatMQP. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the SmallKatBatteryCharger without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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