OhmLeds2 - Revision history

Cmpxchg at 19:11, 30 April 2022

2022-04-30T19:11:26Z

← Older revision		Revision as of 19:11, 30 April 2022
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	\|Picture=		\|Picture=
	\|Omschrijving=Designing successor of Ohmleds		\|Omschrijving=Designing successor of Ohmleds
	\|Status=~~Initializing~~		\|Status=Abandonned
	\|Contact=cmpxchg		\|Contact=cmpxchg
	}}		}}

Cmpxchg at 20:29, 6 June 2020

2020-06-06T20:29:12Z

@@ Line 150: / Line 150: @@
 |-
 | Realtek
-| RTL8201F
+| RTL8201F 10/100Mbps Ethernet PHY
 | https://datasheet.lcsc.com/szlcsc/Realtek-Semicon-RTL8201F-VB-CG_C45044.pdf
 |-
@@ Line 168: / Line 169: @@
 megabit ethernet is very simple encoding, but for 100 megabit ethernet, escape sequences are already defined to define framing, and bandwidth limitations due to that frameing.
-==Mains power==
+==Microcontroller==
-Next to power-over-ethernet, mains power might be needed in PoE is not sufficient or just not working due to vendor-specific implementation details. For this, a discrete 230V to 5V, 40 watt powersupply can be designed on the same, 4-layer board.
+This is the application-specific part, it depends on PHY interface.
 ==LED interface==
 volts, ground, and data/clock soldering pads.

Cmpxchg: /* Ethernet PHY */

2020-06-06T20:10:11Z

Ethernet PHY

← Older revision		Revision as of 20:10, 6 June 2020
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	\| https://www.analog.com/en/products/adin1200.html		\| https://www.analog.com/en/products/adin1200.html
	\|-		\|-
			\|}

	===Discrete Ethernet PHY===		===Discrete Ethernet PHY===

Cmpxchg: /* Ethernet PHY */

2020-06-06T20:09:31Z

Ethernet PHY

← Older revision		Revision as of 20:09, 6 June 2020
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	This part does the clock recovery, converting via a small (!) fifo to the clock domain and parallel interface of the MII interface of the microcontroller. This part should be reliable, no 'packets of death' should bring this link down, for example, as reported already in februari 2013 in this article, bringing the link down after triggering on seemingly arbitrary bytes at a specific offset in the ethernet frame: https://www.theregister.com/2013/02/06/packet_of_death_intel_ethernet/		This part does the clock recovery, converting via a small (!) fifo to the clock domain and parallel interface of the MII interface of the microcontroller. This part should be reliable, no 'packets of death' should bring this link down, for example, as reported already in februari 2013 in this article, bringing the link down after triggering on seemingly arbitrary bytes at a specific offset in the ethernet frame: https://www.theregister.com/2013/02/06/packet_of_death_intel_ethernet/

			{\|
			\|-
			\| Realtek
			\| RTL8201F
			\| https://datasheet.lcsc.com/szlcsc/Realtek-Semicon-RTL8201F-VB-CG_C45044.pdf
			\|-
			\| Analog Devices
			\| ADIN 1200 10/100 PHY
			\| 10BASE-Te/100BASE-TX IEEE® 802.3™ compliant
			MII, RMII and RGMII MAC interfaces
			100BASE-TX RGMII latency transmit: <124 ns, receive <250 ns
			100BASE-TX MII latency transmit: <52 ns, receive <248 ns
			\| https://www.analog.com/en/products/adin1200.html
			\|-


	===Discrete Ethernet PHY===		===Discrete Ethernet PHY===

Cmpxchg: /* Ethernet transformers */

2020-06-06T19:59:16Z

Ethernet transformers

← Older revision		Revision as of 19:59, 6 June 2020
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	*an ethernet PHY that does the actual ethernet analog signal conversion		*an ethernet PHY that does the actual ethernet analog signal conversion

	==Ethernet ~~transformers~~==		==PoE Ethernet transformer and circuitry ==
	The STEVAL-POE002V1 SCHEMATIC is available		The STEVAL-POE002V1 SCHEMATIC is available
	https://www.st.com/content/st_com/en/products/evaluation-tools/solution-evaluation-tools/psu-and-converter-solution-eval-boards/steval-poe002v1.html#resource		https://www.st.com/content/st_com/en/products/evaluation-tools/solution-evaluation-tools/psu-and-converter-solution-eval-boards/steval-poe002v1.html#resource

Cmpxchg: /* Ethernet transformers */

2020-06-06T19:56:01Z

Ethernet transformers

@@ Line 30: / Line 30: @@
 ==Ethernet transformers==
-Coilcraft, wurth..
+The STEVAL-POE002V1 SCHEMATIC is available
 ==PoE controller/circuitry==

Cmpxchg: /* PoE controller/circuitry */

2020-06-06T12:25:17Z

PoE controller/circuitry

Cmpxchg: /* PoE controller/circuitry */

2020-06-06T12:24:48Z

PoE controller/circuitry

Cmpxchg: /* PoE controller/circuitry */

2020-06-06T12:24:22Z

PoE controller/circuitry

@@ Line 35: / Line 35: @@
 This is a combination of many cheap passives, and a PoE controller.
 ST has a few options https://www.st.com/content/st_com/en/campaigns/PoE_supply_reference_designs.html
 ==Ethernet PHY==

Cmpxchg: /* Exploring solution space */

2020-06-06T12:15:17Z

Exploring solution space

← Older revision		Revision as of 12:15, 6 June 2020
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	==Exploring solution space==		==Exploring solution space==

	The SPI link between the microcontroller and ethernet controller is unique for the ~~OhmLight~~ setup. Almost all other microcontrollers use a parallel interface to an ethernet PHY, https://en.wikipedia.org/wiki/Media-independent_interface		The SPI link between the microcontroller and ethernet controller is unique for the OhmLed 2013 setup. Almost all other microcontrollers use a parallel interface to an ethernet PHY, https://en.wikipedia.org/wiki/Media-independent_interface
	The idea is to use a microcontroller with such interface.		The idea is to use a microcontroller with such interface.

			I would like to explore the space of such solution, since this also allows for PoE (power over ethernet)

	==Ethernet interfacing==		==Ethernet interfacing==

← Older revision		Revision as of 12:25, 6 June 2020
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	https://www.st.com/content/st_com/en/products/evaluation-tools/solution-evaluation-tools/psu-and-converter-solution-eval-boards/steval-poe002v1.html		https://www.st.com/content/st_com/en/products/evaluation-tools/solution-evaluation-tools/psu-and-converter-solution-eval-boards/steval-poe002v1.html

	PM8805 4-pair IEEE 802.3bt compliant PD interface (ca EUR 5.00 / 100 pcs)		* PM8805 4-pair IEEE 802.3bt compliant PD interface (ca EUR 5.00 / 100 pcs)
	Output stage managed by configurable PM8804 controller (ca EUR 1.05 / 100 pcs)		* Output stage managed by configurable PM8804 controller (ca EUR 1.05 / 100 pcs)
	Output voltage: 5 VDC ±2.5%		* Output voltage: 5 VDC ±2.5%
	Output current: 8 A		* Output current: 8 A

	Works with power supplied from Ethernet LAN cables or local auxiliary sources		* Works with power supplied from Ethernet LAN cables or local auxiliary sources
	Line input voltage range: 40 to 60 VDC		* Line input voltage range: 40 to 60 VDC

	Peak-to-peak output ripple: <50 mV		* Peak-to-peak output ripple: <50 mV
	DC-DC full load efficiency: >91%		* DC-DC full load efficiency: >91%
	Overall full load efficiency: >90%		* Overall full load efficiency: >90%
	Transient response ΔV pk-pk 100% to 50% load step ≈ 700 mV		* Transient response ΔV pk-pk 100% to 50% load step ≈ 700 mV
	Switching frequency ≈ 280 KHz		* Switching frequency ≈ 280 KHz

	==Ethernet PHY==		==Ethernet PHY==

← Older revision		Revision as of 12:24, 6 June 2020
Line 40:		Line 40:
	https://www.st.com/content/st_com/en/products/evaluation-tools/solution-evaluation-tools/psu-and-converter-solution-eval-boards/steval-poe002v1.html		https://www.st.com/content/st_com/en/products/evaluation-tools/solution-evaluation-tools/psu-and-converter-solution-eval-boards/steval-poe002v1.html

	PM8805 4-pair IEEE 802.3bt compliant PD interface (ca EUR 5.00 / 100 pcs)		PM8805 4-pair IEEE 802.3bt compliant PD interface (ca EUR 5.00 / 100 pcs)
	Output stage managed by configurable PM8804 controller (ca EUR 1.05 / 100 pcs)		Output stage managed by configurable PM8804 controller (ca EUR 1.05 / 100 pcs)
	Output voltage: 5 VDC ±2.5%		Output voltage: 5 VDC ±2.5%
	Output current: 8 A		Output current: 8 A

	Works with power supplied from Ethernet LAN cables or local auxiliary sources		Works with power supplied from Ethernet LAN cables or local auxiliary sources
	Line input voltage range: 40 to 60 VDC		Line input voltage range: 40 to 60 VDC

	Peak-to-peak output ripple: <50 mV		Peak-to-peak output ripple: <50 mV
	DC-DC full load efficiency: >91%		DC-DC full load efficiency: >91%
	Overall full load efficiency: >90%		Overall full load efficiency: >90%
	Transient response ΔV pk-pk 100% to 50% load step ≈ 700 mV		Transient response ΔV pk-pk 100% to 50% load step ≈ 700 mV
	Switching frequency ≈ 280 KHz		Switching frequency ≈ 280 KHz

	==Ethernet PHY==		==Ethernet PHY==