10 layers120.4 × 90 mm
Bmc reference carrier board
antmicro/dc-scm-osm-l-carrier-card
DC-SCM Card supporting OSM-L System on Modules
568 parts13Apache-2.0
4 layers99.5 × 58 mm
Novepad
projectgus/novepad9Adapter board from Kosagi Novena to "iPad 3" 2048x1536 display. Prototype stage.
- Size
- 99.5 × 58 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 155
- Nets
- 180
- Pads
- 703
- Tracks, vias
- 2,994, 371
- Pours
- 13
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 23 Oct 2014
- Updated
- 2 Dec 2014
Overview
Novepad is an open-source printed circuit board by projectgus, from the projectgus/novepad repository on GitHub. It is a 4-layer board of 99.5 × 58 mm with 155 parts on 180 nets, routed with 2,994 tracks and 371 vias.
It is built around the TPS61181RTE, LMR10510YSD and IT6251, with the BLM18KG121TH1 among its other parts. Its parts include 57 capacitors, 35 resistors, 6 inductors, 4 ICs and 4 connectors. It belongs with the lEDs and displays and interfaces and adapters boards of this library.
Main components
4
TPS61181RTE
WQFN-16-EP(3x3)-40℃~+85℃ 1% 1MHz 25mA 38V 5V~24V 6 Boost Built-in DC-DC Over Voltage Protection、Over-Temperature Protection (OTP)、Short-Circuit Protection PWM WQFN-16-EP(3x3) LED Drivers ROHSTexas InstrumentsLED Drivers
LMR10510YSD
WSON-6-EP(3x3)-40℃~+125℃@(TJ) 1 1A 3MHz 3V~5.5V 4.3mA 600mV~4.5V Adjustable Buck Buck Built-in No WSON-6-EP(3x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
IT6251
UncategorisedITE Tech
BLM18KG121TH1
0603-55℃~+125℃ 1 120Ω@100MHz 30mΩ 3A ±25% 0603 Ferrite Beads ROHSMurataFerrite Beads
README
README.mdDevelopment of an adapter board design for Kosagi Novena LVDS interface to connect to the "iPad 3" QXGA 2048x1536 eDP LCD panel (aka LG LP097QX1-SPC1 and related models). Possibly also a touch screen interface to suit that display...
INITIAL PROTOTYPE STAGE, NOT A THING YET
Very closely modelled on Bunnie's existing Novena eDP adapter, with additions. LVDS connection cable from Novena should be the same on both boards.
Designed using KiCad (2014-07-25, any recent version should be OK to open the files). Gerbers are available from the releases page.
Additions to the Novena eDP design
- Backlight driver (2x TI TPS61181)
- Touch screen controller Focaltech FT5816LPC with i2c and USB interfaces. There's a strong chance this will never work (lack of public documentation on controller or digitizer).
- 4 eDP lanes out of IT6251 eDP converter instead of the 2 used on Novena eDP board.
Notes
- Has a lot of numbered test points and 0R resistors due to undocumented or unknown factors.
- Has cut trace jumpers for some key power connections, can be cut to measure power consumption.
Board Stackup
4 layer board, 1oz copper (35um). Desired stackup is:
- Front copper
- 0.2mm prepreg
- GND (Inner1)
- 1.2mm prepreg
- VCC (Inner2)
- 0.2mm prepreg
- Back
(This matches standard 4 layer stackup for my usual prototype PCB supplier, Hackvana).)
The 100 ohm differential microstrip traces (LVDS, eDP) are routed as 0.2mm trace / 0.15mm spacing (~8/6 imperial), at least where possible. This yields estimates in the range of 99.5-102ohm differential impedance depending on who you ask (assuming Er 4.4, calculated using TNT Field Solver and Jean Nicolle's impedance calculator.
Resources
Novena designs
Yay OSHW!
iPad display/connectors
- http://emerythacks.blogspot.com.au/2013/04/connecting-ipad-retina-lcd-to-pc.html
- http://mikesmods.com/mm-wp/?s=ipad+3
Photos of IT6251
You know a chip is going to be fun when photos of PCBs that use it become a useful resource to complement the datasheet.
Parts
155| Qty | Value | Footprint | References |
|---|---|---|---|
| 33 | CONN_1 | novepad:SMD_TEST_POINT | TP201, TP202, TP203, TP204, TP205, TP206, TP301, TP302, TP303, TP304, TP305, TP306, TP307, TP308, TP309, TP401 +17 |
| 27 | 100nF 25V X5R | SMD_Packages:SMD-0402_c | C301, C302, C303, C305, C306, C309, C310, C311, C313, C314, C317, C318, C323, C324, C325, C326 +11 |
| 11 | 100R 1% | SMD_Packages:SMD-0402_r | R301, R302, R303, R304, R305, R306, R307, R308, R309, R310, R311 |
| 6 | 10uF 10V X5R | FT:1206 | C501, C502, C503, C504, C505, C506 |
| 5 | 1uF 10V | FT:0603 | C403, C404, C406, C407, C409 |
| 4 | 10K | FT:0603 | R312, R314, R401, R406 |
| 4 | 27pF | FT:0603 | C321, C322, C405, C408 |
| 4 | 4.7uF 25V | FT:0805 | C201, C203, C207, C208 |
| 4 | VAL** | novepad:STENCIL8_HOLE | STENCIL8_HOLE, STENCIL8_HOLE, STENCIL8_HOLE, STENCIL8_HOLE |
| 3 | 1nF 25V X5R | SMD_Packages:SMD-0402_c | C304, C308, C312 |
| 3 | BLM18KG121 | FT:0603 | L401, L502, L503 |
| 3 | DFLS160-7 | novepad:POWERDI123_DIODE | D201, D202, D501 |
| 3 | SJ | FT:SJ_SHORTED | SJ101, SJ102, SJ501 |
| 2 | 0R DNP | FT:0603 | R201, R407 |
| 2 | 100nF | FT:C0402 | C205, C206 |
| 2 | 10K DNP | FT:0603 | R313, R405 |
| 2 | 10uH NR4018T100M | novepad:NR4018_IND | L201, L202 |
| 2 | 1M | FT:0603 | R315, R409 |
| 2 | 1uF 25V | FT:0603 | C202, C204 |
| 2 | 1uF 25V X5R | SMD_Packages:SMD-0402_c | C315, C507 |
| 2 | 22R | FT:0603 | R403, R404 |
| 2 | 51R | FT:0603 | R202, R203 |
| 2 | 68K 1% | FT:0603 | R204, R205 |
| 2 | TPS61181 | novepad:QFN50P300X300X80-17N | U201, U202 |
| 1 | 0R | FT:0603 | R402 |
| 1 | 100K | FT:0603 | R319 |
| 1 | 100K DNP | FT:0603 | R318 |
| 1 | 100nF 10V | FT:C0402 | C402 |
| 1 | 10K 1% | FT:0603 | R501 |
| 1 | 10R | FT:0603 | R408 |
| 1 | 10uF 10V | FT:1206 | C401 |
| 1 | 12MHz 18pF | FT:HC49UP | X401 |
| 1 | 2.2uH CDRH3D23NP-2R2PC | novepad:CDRH3D23_IND | L501 |
| 1 | 20K 1% | FT:0603 | R502 |
| 1 | 27MHz 50ppm, 8-18pF, ESR < 80ohm | FT:HC49UP | X301 |
| 1 | 33R 1% | FT:0603 | R317 |
| 1 | 820R 1% | FT:0603 | R316 |
| 1 | FT5816LPC | novepad:QFP40P1600X1600X100-129N | U401 |
| 1 | IT6251 | novepad:QFN50P900X900X100-65N | U301 |
| 1 | LMR10510YSD | novepad:WSON6 | REG502 |
| 1 | LP097QX1_CONN | MOLEX_502250_8051 | J102 |
| 1 | MOLEX_502250-8037 | novepad:MOLEX_502250_8037 | J402 |
| 1 | MOLEX_502250-8037 | MOLEX_502250_8037 | J401 |
| 1 | NCP1117ST18T3G DNP | FT:SOT223 | REG501 |
| 1 | NOVENA_LCD_CONN | MOLEX_51926_5494 | J101 |
| 1 | NTPA7220LBMB0 1A 22R INRUSH LIMITER | novepad:PTH_2HOLE_5MM | TH201 |
| 1 | val** | FT:LOGO_OSHW_silkscreen_2mm | LOGO_OSHW_silkscreen_2mm |
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Questions
How big is the Novepad PCB?
It measures 99.5 × 58 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Novepad use?
155 parts, built around the TPS61181RTE, LMR10510YSD, IT6251 and BLM18KG121TH1. 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 Novepad KiCad files?
From the projectgus/novepad repository on GitHub, at the commit this page was made from: the board is novepad.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Novepad design in my own project?
Its repository states no licence, so its author keeps all rights: ask projectgus before reusing the design.