PCB Design for Cinema Camera Power Distribution

flux

  • Connected U2:RTN, R12:P2, C14:P2, R14:P2, R16:P2, R10:P2, U2:MODE to ^TPS_RTN
  • Disconnected U2:RTN, R12:P2, C14:P2, R14:P2, R16:P2, R10:P2, U2:MODE

flux

  • Set C13's Capacitance to "22uF"
  • Set C13's Voltage Rating to "10V"
  • Set C13's Role Details to "AMS1117 output stability capacitor, >=22uF placed close to VOUT and SGND"
  • Set C14's Capacitance to "22nF"
  • Set C14's Role to "Timing"
  • Set C14's Role Details to "TPS26600 dVdT capacitor from dVdT to RTN; 22nF gives controlled output ramp per TI example"
  • Set R12's Resistance to "5.36kohms"
  • Set R12's Tolerance to "1%"
  • Set R12's Role Details to "TPS26600 ILIM resistor to RTN; 5.36k sets maximum supported ~2.23A overload limit"
  • Set R13's Resistance to "715kohms"
  • Set R13's Tolerance to "1%"
  • Set R13's Role Details to "TPS26600 UVLO/OVP upper divider element for ~18V UVLO and ~30V OVP reference network"
  • Set R14's Resistance to "20kohms"
  • Set R14's Tolerance to "1%"
  • Set R14's Role Details to "TPS26600 UVLO/OVP middle divider element feeding UVLO node"
  • Set R15's Resistance to "30.1kohms"
  • Set R15's Tolerance to "1%"
  • Set R15's Role Details to "TPS26600 UVLO/OVP lower divider element feeding OVP node to RTN"
  • Set R16's Resistance to "0ohms"
  • Set R16's Role Details to "Placeholder/strap to tie OVP lower reference to TPS_RTN if using default/derived OVP scheme; verify against final divider top..."

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Project Specification: RED KOMODO-X Power IO Distribution
Goal
Design a 75×66mm 2-layer FR4 1.6mm PCB with 2oz copper on both layers for a professional RED KOMODO-X cinema camera power and IO distribution device. External panel connectors connect by soldered flying leads only; the PCB uses edge solder-pad terminals, not connector footprints.
Architecture
Diagram



  
    
  
  
    
  





















































V-mount plate B plus B minus SMBUS ID
SMAJ18A TVS
6-pin DC input V plus GND SCL SDA
SMAJ18A TVS
AO3401A P-FET
AO3401A P-FET
LTC4412 OR controller
TPS26600 master switch
Latching panel switch
Switched main bus
AMS1117-3.3
3.3V logic rail
Direct unfused D-tap outputs
6A resettable breaker
Aux rail
Camera EXT power
2-pin LEMO accessory ports
Fischer R/S
SI2302 tally switch
Camera EXT IO
Timecode
Genlock
4-pin CTRL LEMO
EXT passthrough
V-mount SMBUS
BLM18 ferrite beads and node_100k pullups
33 ohm series resistors to V-mount output plate
Required Components
  • LTC4412IS6 OR controller, TPS26600PWPR master switch, AMS1117-3.3 LDO
  • AO3401A P-channel MOSFETs ×2, SI2302 tally MOSFET
  • SMAJ18A ×2, SMAJ5.0A ×1, BAT54 ×1, BLM18AG601SH1D ×2
  • 100uF 25V electrolytic bulk, 100nF 0402 ×10, 10uF 0402 ×4, 0402 resistors ×18, 0603 LEDs ×3
  • Four M3 mounting holes 5mm inset from corners
  • Edge solder-pad terminals for all external flying leads
Layout Requirements
  • Board: 75×66mm rectangle, FR4, 1.6mm, 2-layer, 2oz copper both sides
  • Top: components and signal traces
  • Bottom: ground plane with power pours and via stitching on power nodes
  • Power input components bottom edge
  • ORing and TPS26600 lower center
  • AMS1117 and signal/IO components upper half
  • Edge solder pads grouped by function with pad labels
  • Signal and power ground pours split and connected at a single star point near the lower-left main power input
Notes and Assumptions
  • Since panel connectors are external, PCB external interfaces are implemented as solder pads with named nets.
  • A library-compatible BLM18AG601 series ferrite bead is used for the requested Murata BLM18AG601SH1D function.
  • The resettable 6A breaker is represented in the schematic as a labeled series element/terminal path for the aux rail unless an exact breaker footprint is added later.
  • TPS26600 design note: the selected TPS26600PWPR is a 2.23A-max eFuse when RILIM is set to 5.36k. This is below a true 6A camera/aux distribution path, so the schematic uses the selected device but this current-rating mismatch must be reviewed before production if the main bus is expected to carry camera plus accessory current above roughly 2A.
  • TPS26600 RTN note: RTN is kept as a separate support-component reference net for ILIM, dVdT, MODE, SHDN bias, and UVLO/OVP divider returns; it is not intentionally shorted to PGND so reverse-polarity behavior is not defeated.
  • AMS1117 stability note: the 3.3V output capacitor is set to 22uF minimum per AMS1117 stability guidance and should be placed close to VOUT/SGND.

  • Goal

  • Architecture

  • Required Components

  • Layout Requirements

  • Notes and Assumptions

Documents

Assets

Kailh LP Choc PC Keycap.step

Kailh LP Choc PC Keycap.step

Kailh LP Choc PC Keycap3D Model
image.png

image.png

imageThumbnail
RB-67-0-CEMENT.stp

RB-67-0-CEMENT.stp

RB-67-0-CEMENT
svg

Raspberry-Pi logo.svg

Raspberry-Pi logoDefault

RED KOMODO-X Power IO Distribution

RED KOMODO-X Power IO Distribution thumbnail
2-layer 75×66mm RED KOMODO-X power and IO distribution board with dual input ORing, protected switched bus, 3.3V logic rail, edge solder-pad flying-lead terminals, and split ground star-point architecture.

Properties

creativecommons.org/licenses/by/4.0/

Consumer Electronics

18

V

Battery

75×66mm FR4 1.6mm 2-layer PCB, 2oz copper top/bottom, bottom ground plane with power/signal split and star point near lower-left main input; external panel connectors use edge solder pads only.

Pricing & Availability

Distributor

Qty 1

Arrow

$5.14–$9.60

Digi-Key

$5.04–$8.56

HQonline

$1.67–$1.88

LCSC

$4.29–$4.76

Mouser

$13.11–$13.47

TME

$3.41

Verical

$2.82–$8.26

Controls