Zanflare - Revision history

WikiSysop: /* Buck Converter (Charger) */

2019-03-30T01:04:09Z

Buck Converter (Charger)

← Older revision		Revision as of 01:04, 30 March 2019
Line 26:		Line 26:
	The input is fed through an SS24 schottky diode (2A, 40V, 0.39Vf at 1A) decoupled with a 100uF/16V electrolytic capacitor, plus a 22uF/25V electrolytic capacitor for each cell. The charger consists of a RU30S5H dual P-channel MOSFET, rated for up to 30V, 5A, 56mOhm at Vgs = 4.5V, up to 2W power dissipation, switched at 126kHz with a 47uH inductor and 22uF (?) x 2 MLCC output capacitor. Current is measured through a 0.3 ohm sense resistor.		The input is fed through an SS24 schottky diode (2A, 40V, 0.39Vf at 1A) decoupled with a 100uF/16V electrolytic capacitor, plus a 22uF/25V electrolytic capacitor for each cell. The charger consists of a RU30S5H dual P-channel MOSFET, rated for up to 30V, 5A, 56mOhm at Vgs = 4.5V, up to 2W power dissipation, switched at 126kHz with a 47uH inductor and 22uF (?) x 2 MLCC output capacitor. Current is measured through a 0.3 ohm sense resistor.

	Charge is terminated when the current drops below 110mA in CV mode.		Charge is terminated when the current drops below 110mA in CV mode. There is no rest period before discharge begins.

	===FET Discharger===		===FET Discharger===

WikiSysop: /* Buck Converter (Charger) */

2019-03-30T01:03:52Z

Buck Converter (Charger)

← Older revision		Revision as of 01:03, 30 March 2019
Line 26:		Line 26:
	The input is fed through an SS24 schottky diode (2A, 40V, 0.39Vf at 1A) decoupled with a 100uF/16V electrolytic capacitor, plus a 22uF/25V electrolytic capacitor for each cell. The charger consists of a RU30S5H dual P-channel MOSFET, rated for up to 30V, 5A, 56mOhm at Vgs = 4.5V, up to 2W power dissipation, switched at 126kHz with a 47uH inductor and 22uF (?) x 2 MLCC output capacitor. Current is measured through a 0.3 ohm sense resistor.		The input is fed through an SS24 schottky diode (2A, 40V, 0.39Vf at 1A) decoupled with a 100uF/16V electrolytic capacitor, plus a 22uF/25V electrolytic capacitor for each cell. The charger consists of a RU30S5H dual P-channel MOSFET, rated for up to 30V, 5A, 56mOhm at Vgs = 4.5V, up to 2W power dissipation, switched at 126kHz with a 47uH inductor and 22uF (?) x 2 MLCC output capacitor. Current is measured through a 0.3 ohm sense resistor.

	Charge is terminated when the current drops below ~~50-70mA~~ in CV mode.		Charge is terminated when the current drops below 110mA in CV mode.

	===FET Discharger===		===FET Discharger===

WikiSysop: /* FET Discharger */

2019-03-29T23:47:11Z

FET Discharger

← Older revision		Revision as of 23:47, 29 March 2019
Line 33:		Line 33:
	[[File:Ccr_v20_boost_simple.png\|thumb\|center\|400px\|Simplified boost circuit schematic for the CCR v2.0.]]		[[File:Ccr_v20_boost_simple.png\|thumb\|center\|400px\|Simplified boost circuit schematic for the CCR v2.0.]]

	The battery positive goes through a 0.3 ohm current sense resistor to the drain of a VST012N06HS N-channel MOSFET (55A, 60V, 8.5mOhm at Vgs = 10V, 115W power capability, ~2.7W max dissipation with 40C ambient, equivalent to 0.64A at 4.2V). The PWM rate for the MOSFET is 126 kHz. The peak battery current for a 4.2V Li-Ion battery is approximately ~~14A~~ pulsed, accounting for voltage drops in the FET and current sense resistor.		The battery positive goes through a 0.3 ohm current sense resistor to the drain of a VST012N06HS N-channel MOSFET (55A, 60V, 8.5mOhm at Vgs = 10V, 115W power capability, ~2.7W max dissipation with 40C ambient, equivalent to 0.64A at 4.2V). The PWM rate for the MOSFET is 126 kHz. The peak battery current for a 4.2V Li-Ion battery is approximately 11.6A pulsed, accounting for voltage drops in the FET and current sense resistor.

	Discharge termination is when the Li-Ion battery reaches 2.75V at constant current.		Discharge termination is when the Li-Ion battery reaches 2.75V at constant current.

WikiSysop: /* FET Discharger */

2019-03-29T23:42:46Z

FET Discharger

← Older revision		Revision as of 23:42, 29 March 2019
Line 33:		Line 33:
	[[File:Ccr_v20_boost_simple.png\|thumb\|center\|400px\|Simplified boost circuit schematic for the CCR v2.0.]]		[[File:Ccr_v20_boost_simple.png\|thumb\|center\|400px\|Simplified boost circuit schematic for the CCR v2.0.]]

	The battery positive goes through a 0.3 ohm current sense resistor to the drain of a VST012N06HS N-channel MOSFET (55A, 60V, 8.5mOhm at Vgs = 10V, 115W power capability, ~2.7W max dissipation with 40C ambient, equivalent to 0.64A at 4.2V). The PWM rate for the MOSFET is 126 kHz. The peak battery current for a 4.2V Li-Ion battery is approximately xA pulsed, accounting for voltage drops in the FET and current sense resistor.		The battery positive goes through a 0.3 ohm current sense resistor to the drain of a VST012N06HS N-channel MOSFET (55A, 60V, 8.5mOhm at Vgs = 10V, 115W power capability, ~2.7W max dissipation with 40C ambient, equivalent to 0.64A at 4.2V). The PWM rate for the MOSFET is 126 kHz. The peak battery current for a 4.2V Li-Ion battery is approximately 14A pulsed, accounting for voltage drops in the FET and current sense resistor.

	Discharge termination is when the Li-Ion battery reaches 2.75V at constant current.		Discharge termination is when the Li-Ion battery reaches 2.75V at constant current.

WikiSysop: /* FET Discharger */

2019-03-29T23:34:27Z

FET Discharger

← Older revision		Revision as of 23:34, 29 March 2019
Line 33:		Line 33:
	[[File:Ccr_v20_boost_simple.png\|thumb\|center\|400px\|Simplified boost circuit schematic for the CCR v2.0.]]		[[File:Ccr_v20_boost_simple.png\|thumb\|center\|400px\|Simplified boost circuit schematic for the CCR v2.0.]]

	The battery positive goes through a 0.3 ohm current sense resistor to the drain of a VST012N06HS N-channel MOSFET (55A, 60V, 8.5mOhm at Vgs = 10V, 115W power capability, ~2.7W max dissipation with 40C ambient, equivalent to 0.64A at 4.2V). The PWM rate for the MOSFET is ~~x Hz~~. The peak battery current for a 4.2V Li-Ion battery is approximately xA pulsed, accounting for voltage drops in the FET and current sense resistor.		The battery positive goes through a 0.3 ohm current sense resistor to the drain of a VST012N06HS N-channel MOSFET (55A, 60V, 8.5mOhm at Vgs = 10V, 115W power capability, ~2.7W max dissipation with 40C ambient, equivalent to 0.64A at 4.2V). The PWM rate for the MOSFET is 126 kHz. The peak battery current for a 4.2V Li-Ion battery is approximately xA pulsed, accounting for voltage drops in the FET and current sense resistor.

	Discharge termination is when the Li-Ion battery reaches 2.75V at constant current.		Discharge termination is when the Li-Ion battery reaches 2.75V at constant current.

WikiSysop: /* List of Features */

2019-03-29T23:28:00Z

List of Features

← Older revision		Revision as of 23:28, 29 March 2019
Line 9:		Line 9:
	* Max Current (Discharge): 0.5A		* Max Current (Discharge): 0.5A
	* Efficiency: xx% (charging, single slot at 1A, 3.8V)		* Efficiency: xx% (charging, single slot at 1A, 3.8V)
	* Modes: Charge, Nor Test (C/D/C), Fast Test		* Modes: Charge, Nor Test (C/D/C), Fast Test (D/C)
	* 10mV voltage resolution (3 digits), xHz update rate		* 10mV voltage resolution (3 digits), xHz update rate

WikiSysop: /* List of Features */

2019-03-29T23:26:35Z

List of Features

← Older revision		Revision as of 23:26, 29 March 2019
Line 9:		Line 9:
	* Max Current (Discharge): 0.5A		* Max Current (Discharge): 0.5A
	* Efficiency: xx% (charging, single slot at 1A, 3.8V)		* Efficiency: xx% (charging, single slot at 1A, 3.8V)
	* Modes: Charge, ~~Charge~~ Test (C/D/C), ~~Quick~~ Test ~~(IR)~~		* Modes: Charge, Nor Test (C/D/C), Fast Test
	* ~~xmA current resolution (4 digits), xmV~~ voltage resolution (3 digits), xHz update rate		* 10mV voltage resolution (3 digits), xHz update rate

	==Heatsink Sizing==		==Heatsink Sizing==

WikiSysop: /* Buck Converter (Charger) */

2019-03-29T23:24:41Z

Buck Converter (Charger)

← Older revision		Revision as of 23:24, 29 March 2019
Line 24:		Line 24:
	[[File:Ccr_v20_buck_simple.png\|thumb\|center\|400px\|Simplified buck circuit schematic for the CCR v2.0.]]		[[File:Ccr_v20_buck_simple.png\|thumb\|center\|400px\|Simplified buck circuit schematic for the CCR v2.0.]]

	The input is fed through an SS24 schottky diode (2A, 40V, 0.39Vf at 1A) decoupled with a 100uF/16V electrolytic capacitor, plus a 22uF/25V electrolytic capacitor for each cell. The charger consists of a RU30S5H dual P-channel MOSFET, rated for up to 30V, 5A, 56mOhm at Vgs = 4.5V, up to 2W power dissipation, with a 47uH inductor and 22uF (?) x 2 MLCC output capacitor. ~~This~~ is measured by a 0.3 ohm sense resistor.		The input is fed through an SS24 schottky diode (2A, 40V, 0.39Vf at 1A) decoupled with a 100uF/16V electrolytic capacitor, plus a 22uF/25V electrolytic capacitor for each cell. The charger consists of a RU30S5H dual P-channel MOSFET, rated for up to 30V, 5A, 56mOhm at Vgs = 4.5V, up to 2W power dissipation, switched at 126kHz with a 47uH inductor and 22uF (?) x 2 MLCC output capacitor. Current is measured through a 0.3 ohm sense resistor.

	Charge is terminated when the current drops below 50-70mA in CV mode.		Charge is terminated when the current drops below 50-70mA in CV mode.

WikiSysop: /* Resistor Discharger */

2019-03-29T23:11:39Z

Resistor Discharger

← Older revision		Revision as of 23:11, 29 March 2019
Line 28:		Line 28:
	Charge is terminated when the current drops below 50-70mA in CV mode.		Charge is terminated when the current drops below 50-70mA in CV mode.

	===~~Resistor~~ Discharger===		===FET Discharger===
	A simplified schematic of the circuit that discharges the battery is shown in the thumbnail below:		A simplified schematic of the circuit that discharges the battery is shown in the thumbnail below:

	[[File:Ccr_v20_boost_simple.png\|thumb\|center\|400px\|Simplified boost circuit schematic for the CCR v2.0.]]		[[File:Ccr_v20_boost_simple.png\|thumb\|center\|400px\|Simplified boost circuit schematic for the CCR v2.0.]]

	The battery positive goes through 2 0.12 ohm current sense ~~resistors in parallel, through an SS34 schottky diode~~ (3A, ~~40V~~, 0.~~4Vf~~ at ~~2A)~~, ~~and into 6 5~~.~~1 ohm resistors in parallel (0.85 ohms~~ equivalent~~), switched through an AO3400 N-channel MOSFET rated for up~~ to 5.~~8A drain current, <33mOhm resistance~~ at 4.~~5Vgs, and up to 1.4W power dissipation~~. The PWM rate for the MOSFET is 20 Hz. The peak battery current for a 4.2V Li-Ion battery is approximately 4A pulsed, accounting for voltage drops in the ~~diode,~~ FET, and current sense ~~resistors~~.		The battery positive goes through a 0.3 ohm current sense resistor to the drain of a VST012N06HS N-channel MOSFET (55A, 60V, 8.5mOhm at Vgs = 10V, 115W power capability, ~2.7W max dissipation with 40C ambient, equivalent to 0.64A at 4.2V). The PWM rate for the MOSFET is x Hz. The peak battery current for a 4.2V Li-Ion battery is approximately xA pulsed, accounting for voltage drops in the FET and current sense resistor.

	Discharge termination is when the Li-Ion battery reaches 2.~~70V~~ at constant current~~. There is no rest period after discharge before charging begins~~.		Discharge termination is when the Li-Ion battery reaches 2.75V at constant current.

	===LCD===		===LCD===

WikiSysop: /* Buck Converter (Charger) */

2019-03-29T22:59:43Z

Buck Converter (Charger)

← Older revision		Revision as of 22:59, 29 March 2019
Line 18:		Line 18:
	==Electronics==		==Electronics==
	===Buck Converter (Charger)===		===Buck Converter (Charger)===
			Reverse polarity protection is achieved by use of a low-side N-channel MOSFET (STT8205S) rated for 6A, 20V, 38mOhm at Vgs = 2.5V, up to 1.14W power dissipation.

	A simplified schematic of the buck converter that charges the battery from a 12V supply is shown in the thumbnail below:		A simplified schematic of the buck converter that charges the battery from a 12V supply is shown in the thumbnail below:

	[[File:Ccr_v20_buck_simple.png\|thumb\|center\|400px\|Simplified buck circuit schematic for the CCR v2.0.]]		[[File:Ccr_v20_buck_simple.png\|thumb\|center\|400px\|Simplified buck circuit schematic for the CCR v2.0.]]

	The input is decoupled with a ~~1000uF~~/16V electrolytic capacitor, plus ~~10uF of MLCC~~ for each cell. The charger consists of a EUP3484 340kHz 3A synchronous buck converter, which steps down the 12V to either 3.273V (in Ni* battery mode) or 6.326V (in Li* battery mode), with a 15uH inductor and 220uF 10V electrolytic output capacitor. This is switched through an AO3419 P-channel MOSFET rated for up to 3.5A ~~drain current~~, ~~<102mOhm resistance~~ at 4.~~5Vgs~~, ~~and~~ up to ~~1.4W~~ power dissipation. This ~~~20Hz PWM switched output~~ is ~~then fed through an SS34 schottky diode (3A, 40V,~~ 0.~~4Vf at 2A), and 2 0.12 Ohm current~~ sense ~~resistors in parallel to the battery positive terminal~~.		The input is fed through an SS24 schottky diode (2A, 40V, 0.39Vf at 1A) decoupled with a 100uF/16V electrolytic capacitor, plus a 22uF/25V electrolytic capacitor for each cell. The charger consists of a RU30S5H dual P-channel MOSFET, rated for up to 30V, 5A, 56mOhm at Vgs = 4.5V, up to 2W power dissipation, with a 47uH inductor and 22uF (?) x 2 MLCC output capacitor. This is measured by a 0.3 ohm sense resistor.

	Charge is terminated when the ~~voltage exceeds 4.21V at 87mA average constant~~ current.		Charge is terminated when the current drops below 50-70mA in CV mode.

	===Resistor Discharger===		===Resistor Discharger===