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4 layers103.5 × 85 mmLTC3 Charge Controller, the printed circuit board in 3D

LTC3 Charge Controller

psas/launch-tower19

CAD files and software for the launch tower computer (LTC)

Open in PCBKitView on GitHub.kicad_pcb
Size
103.5 × 85 mm
Copper layers
4
Thickness
1.6 mm
Parts
450
Nets
72
Pads
715
Tracks, vias
779, 100
Pours
15
Routed
Yes
KiCad
KiCad 4
Created
23 Feb 2013
Updated
22 May 2026

Overview

LTC3 Charge Controller is an open-source printed circuit board by psas, from the psas/launch-tower repository on GitHub. It is a 4-layer board of 103.5 × 85 mm with 450 parts on 72 nets, routed with 779 tracks and 100 vias.

It is built around the LTC2990CMS, BSC028N06NS and BZT52C13, with the MMBT5550L, ZVN4525E6TA and ZVP3310FTA among its other parts. Its parts include 49 resistors, 37 capacitors, 7 transistors, 5 ICs and 5 diodes.

Main components

6

Parts

450
QtyValueFootprintReferences
8TESTMeasurement_Points:Test_Point_2PadsW1, W2, W3, W4, W5, W6, W11, W12
62.2μCapacitors_SMD:C_1210C9, C11, C12, C14, C20, C21
50.1μCapacitors_SMD:C_0805C3, C26, C31, C34, C37
40Resistors_SMD:R_0805R5, R6, R48, R49
410Resistors_SMD:R_0805R21, R28, R29, R39
4BSC028N06NSPower_Integrations:SO-8Q2, Q3, Q4, Q5
4MountingHole_0.1120in_#4LTC3:MountingHole_0.1120in_number4, , ,
4TEST_1PMeasurement_Points:Measurement_Point_Square-SMD-Pad_SmallW7, W8, W9, W10
30Resistors_SMD:R_0603R15, R25, R34
310kResistors_SMD:R_0805R3, R4, R19
333μCapacitors_SMD:c_elec_10x10C2, C4, C5
34.7μCapacitors_SMD:C_0805C6, C7, C24
20.001μCapacitors_SMD:C_0805C22, C23
20.01μCapacitors_SMD:C_0805C8, C10
210mResistors_SMD:R_1206R20, R38
210μCapacitors_SMD:c_elec_6.3x7.7C33, C35
211.5kResistors_SMD:R_0805R32, R33
212kResistors_SMD:R_0805R44, R46
21μCapacitors_SMD:C_0805C25, C30
2220nCapacitors_SMD:C_0805C13, C15
23.32kResistors_SMD:R_0805R12, R27
24.7μCapacitors_SMD:C_2220C28, C29
2470nCapacitors_SMD:C_0805C18, C32
2549Resistors_SMD:R_0805R23, R24
275kResistors_SMD:R_0805R43, R45
2CMMR1U-02Diodes_SMD:SOD-123D1, D2
2PI2127LTC3:LGA-17U1, U2
10.18μCapacitors_SMD:C_0805C27
10.33μCapacitors_SMD:C_0805C1
11.3kResistors_SMD:R_0805R26
110.2kResistors_SMD:R_0805R37
1100kResistors_SMD:R_0805R40
110uHLTC3:Coilcraft_SER2900L1
1110kResistors_SMD:R_0805R1
1150μCapacitors_ThroughHole:C_Radial_D12.5_L25_P5C36
115ALTC3:Fuseholder_Auto_Blade_Regular_Keystone_3557-2F1
116.5kResistors_SMD:R_0805R11
1196kResistors_SMD:R_0805R9
1200kResistors_SMD:R_0805R30
1215kResistors_SMD:R_0805R13
121kResistors_SMD:R_0805R14
1220pCapacitors_SMD:C_0805C17
1243kResistors_SMD:R_0805R18
125.5kResistors_SMD:R_0805R16
126.1kResistors_SMD:R_0805R41
1294kResistors_SMD:R_0805R36
13.01kResistors_SMD:R_0805R17
135.7kResistors_SMD:R_0805R2
14N25Housings_DIP:DIP-6_W7.62mmU5
153.6kResistors_SMD:R_0805R22
157.6kResistors_SMD:R_0805R35
15mResistors_SMD:R_1206R31
160mResistors_SMD:R_2512R42
168nCapacitors_SMD:C_0805C19
17.68kResistors_SMD:R_0805R8
18.06kResistors_SMD:R_0805R10
18.2nCapacitors_SMD:C_0805C16
193.1kResistors_SMD:R_0805R7
1BZT52C13Diodes_SMD:SOD-123D5
1CONN_01X08Connectors_Molex:Molex_Microfit3_Header_02x04_Straight_43045-0828P1
1GREENLEDs:LED_1206D3
1LT8490LTC3:LT8490U3
1LTC2990LTC3:MSOP-10U4
1MMBT5550LTO_SOT_Packages_SMD:SOT-23Q7
1Molex MicroFitConnectors_Molex:Molex_Microfit3_Header_02x02_Straight_43045-0428P2
1REDLEDs:LED_1206D4
1TBDResistors_SMD:R_0805R47
1XH headerConnectors_JST:JST_EH_B02B-EH-A_02x2.50mm_StraightP5
1XH headerConnectors_JST:JST_EH_B04B-EH-A_04x2.50mm_StraightP6
1XH headerConnectors_JST:JST_XH_B02B-XH-A_02x2.50mm_StraightP3
1ZVN4525E6LTC3:SOT-26Q1
1ZVP3310FTO_SOT_Packages_SMD:SOT-23Q6

The 126 most common of 450 parts.

Questions

How big is the LTC3 Charge Controller PCB?

It measures 103.5 × 85 mm and has 4 copper layers, 1.6 mm thick.

What parts does the LTC3 Charge Controller use?

450 parts, built around the LTC2990CMS, BSC028N06NS, BZT52C13 and MMBT5550L. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the LTC3 Charge Controller KiCad files?

From the psas/launch-tower repository on GitHub, at the commit this page was made from: the board is ltc3/kicad/charge_controller/LTC3_Charge_Controller.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the LTC3 Charge Controller design in my own project?

Its repository states no licence, so its author keeps all rights: ask psas before reusing the design.

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