Power Supply - Revision history

Admin at 20:16, 10 October 2021

2021-10-10T20:16:21Z

Admin: /* BalthazarPSU2 */

2020-12-22T17:56:26Z

BalthazarPSU2

Admin: /* BalthazarPSU2 */

2020-12-22T08:51:40Z

BalthazarPSU2

Admin at 08:42, 22 December 2020

2020-12-22T08:42:30Z

Admin: /* New PCB module for Balthazar has been developed. */

2020-12-22T08:41:05Z

New PCB module for Balthazar has been developed.

Admin at 11:13, 17 November 2020

2020-11-17T11:13:36Z

Admin: /* New PCB module for Balthazar has been developed. */

2020-11-17T09:13:08Z

New PCB module for Balthazar has been developed.

Admin: /* New PCB module for Balthazar has been developed. */

2020-11-11T12:01:33Z

New PCB module for Balthazar has been developed.

Admin: /* New PCB module for Balthazar has been developed. */

2020-05-24T10:36:49Z

New PCB module for Balthazar has been developed.

Admin: /* New PCB module for Balthazar has been developed. */

2020-05-19T16:34:18Z

New PCB module for Balthazar has been developed.

@@ Line 1: / Line 1: @@
 == Power Supply ==
-Power Supply is an important internal part of any laptop and in our case we are trying to redesign it a bit to be more efficient and also try to add stable current "comb" that will comply to all ACPI requirements.
+Power Supply is an important internal part of any laptop and in our case, we are trying to redesign it a bit to be more efficient and also try to add a stable current "comb" that will comply with all ACPI requirements.
 === Balthazar PSU ===
@@ Line 7: / Line 7: @@
 Based on the above, these are the outlines:
-. Universal power adapter – 12Vdc/5A (60VA max) – the most usual laptop power connector /
+. Universal power adapter – 12Vdc/5A (60VA Max) – the most usual laptop power connector /
-either exterior or inserted into chasis skeleton
+either exterior or inserted into chassis skeleton
 . Input RFI filter
 . Buck/ boost converter - 5-15V -> 5.1V (which is VSYS voltage on mainboard)
-. LiPo battery pack single cell charger -> from SYS voltage 5.1V
+. LiPo battery pack single-cell charger -> from SYS voltage 5.1V
-. Large LiPo battery pack (10000mAh) – single cells / in parallel = 3.6V – three terminal
+. Large LiPo battery pack (10000mAh) – single cells / in parallel = 3.6V – three-terminal
 connector (-Vbat=gnd, thermistor NTC_TS, +Vbat=3.6V)
-. Options: charge to/from/use external 5V battery pack (Usb-A and/or Usb-C connectors),
+. Options: charge to/from/use external 5V battery pack (USB-A and/or USB-C connectors),
 solar panel charger, ...
 . VSYS voltage is the main motherboard voltage line – use appropriate buck or boost
-converters on all separate functional modules (cpu, graphics, ram, etc.)
+converters on all separate functional modules (CPU, graphics, ram, etc.)
@@ Line 29: / Line 29: @@
 The valid adapter range is from 3.5 V (VVBUS_CONVEN) to 24 V (ACOV) with at least 500-mA
-current rating. When CHRG_OK goes HIGH, the system is powered from adapter through the
+current rating. When CHRG_OK goes HIGH, the system is powered from the adapter through the
-charger. When adapter is removed, the system is connected to battery through BATFET. Typically
+charger. When the adapter is removed, the system is connected to the battery through BATFET. Typically
 the battery depletion threshold should be greater than the minimum system voltage so that the
 battery capacity can be fully utilized for maximum battery life (meaning: rather use 2S battery
-pack).Four external N-channel MOSFETs are used for a synchronous switching battery charger. The gate
+pack). Four external N-channel MOSFETs are used for asynchronous switching battery chargers. The gate
-drivers are internally integrated into the IC with 6 V of gate drive voltage. 30 V or higher voltage
+drivers are internally integrated into the IC with 6 V of the gate drive voltage. 30 V or higher voltage
 rating MOSFETs are preferred for 19 V - 20 V input voltage.
 === Input Capacitor ===
-Input capacitor should have enough ripple current rating to absorb input switching ripple current.
+The input capacitor should have enough ripple current rating to absorb input switching ripple current.
-The worst case RMS ripple current is half of the charging current when duty cycle is 0.5 in buck
+The worst-case RMS ripple current is half of the charging current when the duty cycle is 0.5 in buck
-mode. If the converter does not operate at 50% duty cycle, then the worst case capacitor RMS
+mode. If the converter does not operate at 50% duty cycle, then the worst-case capacitor RMS
 current occurs where the duty cycle is closest to 50%. Low ESR ceramic capacitor such as X7R or
 X5R is preferred for input decoupling capacitor and should be placed to the drain of the high side
-MOSFET and source of the low side MOSFET as close as possible. Voltage rating of the capacitor
+MOSFET and source of the low side MOSFET as close as possible. The voltage rating of the capacitor
-must be higher than normal input voltage level. 25 V rating or higher capacitor is preferred for 19 V
+must be higher than the normal input voltage level. 25 V rating or higher capacitor is preferred for 19 V
 - 20 V input voltage. Minimum 4 - 6 pcs of 10-μF 0805 size capacitor is suggested for 45 - 65 W
 adapter design.
@@ Line 80: / Line 80: @@
 Buck/ boost dc/dc converters (these are on the mainboard)
-This is solution by pinebookpro v2.1 (uses RK3399 SOC – powered by 1.8V)
+This is the solution by pinebookpro v2.1 (uses RK3399 SOC – powered by 1.8V)
 [[File:Balt pinebookpro PSU.png|thumb|center]]
@@ Line 86: / Line 86: @@
 === New PCB module for Balthazar has been developed. ===
-Power supply unit based on battery charger (Texas Instruments) chip from any available source (12V / 4A mains adapter or USB power bank) and two separate buck/ boost converters for 3.3V or 5V for the necessary computer blocks (the LCD and the processor board). The board also has  a stereo D-class audio power amplifier powered directly from battery (and/or adapter) 3.6 to 4.2V - so as not to dwell on the two much more important stabilised sources.
+Power supply unit based on battery charger (Texas Instruments) chip from any available source (12V / 4A mains adapter or USB power bank) and two separate buck/ boost converters for 3.3V or 5V for the necessary computer blocks (the LCD and the processor board). The board also has a stereo D-class audio power amplifier powered directly from the battery (and/or adapter) 3.6 to 4.2V - so as not to dwell on the two much more important stabilized sources.
 <gallery>
@@ Line 98: / Line 98: @@
 Features:
-     • LiIo / LiPo battery charger 3A with wide range of input options
+     • LiIon / LiPo battery charger 3A with a wide range of input options
      • mains adapter 4.9-17V/3A, USB power bank 5V power sources
      • two independent dc-dc buck/ boost converters (each 3.3V/4A or 5V/3A)
@@ Line 107: / Line 107: @@
      • manual audio mute switch
-Bathazar PSU schematic in:
+Balthazar PSU schematic in:
 [[:File:BathazarPSU-Schematic03.pdf|.PDF]]
@@ Line 115: / Line 115: @@
 [[:File:BalthazarPSU-Bill.ods|.ODS]]
-PCB ready for prototype as KiCad files are available at our [https://github.com/balthazar-space Github] pages.
+PCB is ready for prototype as KiCad files are available at our [https://github.com/balthazar-space Github] pages.
-Those will be regularly updated as schematics and PCBs are continuously improved and optimised.
+Those will be regularly updated as schematics and PCBs are continuously improved and optimized.
 === BalthazarPSU2 ===
-[https://github.com/balthazar-space/balthazarPSU2 Module BalthazarPSU2] is a combined battery charger, buck-boost converter, stereo power amplifier and USB 2.0 hub.
+[https://github.com/balthazar-space/balthazarPSU2 Module BalthazarPSU2] is a combined battery charger, buck-boost converter, stereo power amplifier, and USB 2.0 hub.
-A somehow revised version of BalthazarPSU module, this one has an added USB 2.0 hub based on Microchip USB2514B which was much more readily available in Europe than GL3520 chip.
+A somehow revised version of the BalthazarPSU module, this one has an added USB 2.0 hub based on Microchip USB2514B which was much more readily available in Europe than the GL3520 chip.
 <gallery>
@@ Line 130: / Line 130: @@
 </gallery>
-For more on schematics, elements, bill of materials visit our [https://github.com/balthazar-space/balthazarPSU2 Github] page.
+For more on schematics, elements, Bill of Materials visit our [https://github.com/balthazar-space/balthazarPSU2 Github] page.

← Older revision		Revision as of 17:56, 22 December 2020
Line 129:		Line 129:
	File:BalthazarPSU2-2.png\|thumb\|		File:BalthazarPSU2-2.png\|thumb\|
	</gallery>		</gallery>
		+
		+	For more on schematics, elements, bill of materials visit our [https://github.com/balthazar-space/balthazarPSU2 Github] page.

← Older revision		Revision as of 08:51, 22 December 2020
Line 124:		Line 124:
	[https://github.com/balthazar-space/balthazarPSU2 Module BalthazarPSU2] is a combined battery charger, buck-boost converter, stereo power amplifier and USB 2.0 hub.		[https://github.com/balthazar-space/balthazarPSU2 Module BalthazarPSU2] is a combined battery charger, buck-boost converter, stereo power amplifier and USB 2.0 hub.
	A somehow revised version of BalthazarPSU module, this one has an added USB 2.0 hub based on Microchip USB2514B which was much more readily available in Europe than GL3520 chip.		A somehow revised version of BalthazarPSU module, this one has an added USB 2.0 hub based on Microchip USB2514B which was much more readily available in Europe than GL3520 chip.
		+
		+	<gallery>
		+	File:BalthazarPSU2-1.png\|thumb\|
		+	File:BalthazarPSU2-2.png\|thumb\|
		+	</gallery>

@@ Line 119: / Line 119: @@
 Those will be regularly updated as schematics and PCBs are continuously improved and optimised.
-== BalthazarPSU2 ==
+=== BalthazarPSU2 ===
 [https://github.com/balthazar-space/balthazarPSU2 Module BalthazarPSU2] is a combined battery charger, buck-boost converter, stereo power amplifier and USB 2.0 hub.

@@ Line 118: / Line 118: @@
 Those will be regularly updated as schematics and PCBs are continuously improved and optimised.
   Go to:
   [[I/O_USB|I/O hub]]  or [[Keyboard|Keyboard]]

← Older revision		Revision as of 11:13, 17 November 2020
Line 118:		Line 118:

	Those will be regularly updated as schematics and PCBs are continuously improved and optimised.		Those will be regularly updated as schematics and PCBs are continuously improved and optimised.
		+
		+
		+	Go to:
		+	[[I/O_USB\|I/O hub]] or [[Keyboard\|Keyboard]]

@@ Line 88: / Line 88: @@
 Power supply unit based on battery charger (Texas Instruments) chip from any available source (12V / 4A mains adapter or USB power bank) and two separate buck/ boost converters for 3.3V or 5V for the necessary computer blocks (the LCD and the processor board). The board also has  a stereo D-class audio power amplifier powered directly from battery (and/or adapter) 3.6 to 4.2V - so as not to dwell on the two much more important stabilised sources.
+<gallery>
-[[File:Pcb-psu-proto06.png|thumb|left]]
+File:Pcb-psu-proto06.png|thumb|
-[[File:Pcb-psu-proto05.png|thumb|left]]
+File:Pcb-psu-proto05.png|thumb|
 Details on PSU module
@@ Line 115: / Line 118: @@
 Those will be regularly updated as schematics and PCBs are continuously improved and optimised.

@@ Line 112: / Line 112: @@
 [[File:BalthazarPSU-Bill.ods|thumb|left]]
 PCB ready for prototype as KiCad files are available at our [https://github.com/balthazar-space Github] pages.
 [[File:Pcb-psu-proto07.png|thumb|left]]
 [[File:Pcb-psu-proto04.png|thumb|left]]