Difference between revisions of "Ryobi40V"

From rev0wiki
Jump to: navigation, search
(Electronics)
 
(3 intermediate revisions by the same user not shown)
Line 6: Line 6:
 
[[File:Ryobi_40VChg_PCB_Bot.jpg|thumb|center|400px|PCB bottom side.]]
 
[[File:Ryobi_40VChg_PCB_Bot.jpg|thumb|center|400px|PCB bottom side.]]
  
The wall wart adapter is a 42V 1.5A rated switching converter, listed at 84W max from AC (though output is max 63W). The wall wart does the necessary CC/CV current limiting, with a ~44.2V open circuit voltage output when no battery is connected. Output is switched to the battery though a MOSFET.  
+
The wall wart adapter is a 42V 1.5A rated switching converter, listed at 84W max from AC (though output is max 63W). The wall wart does the necessary CC/CV current limiting, with a ~44.15V open circuit voltage output when no battery is connected. Output is switched to the battery though a "GS3MR HCH" diode, switched by a AP9575GH-HF P-channel MOSFET (60V 15A 90mΩ @12A).
  
 
Charging Sequence:
 
Charging Sequence:
Line 15: Line 15:
  
 
The charger includes a 5V 1.5A buck based on a MP2487 (4.5-55V in, 220mOhm PFET, 1.5A max). The sticker claims 5V 2.1A output.
 
The charger includes a 5V 1.5A buck based on a MP2487 (4.5-55V in, 220mOhm PFET, 1.5A max). The sticker claims 5V 2.1A output.
 +
 +
There is also a resistor bank of 10 ohms effective (5p 130 ohms SMD series 5p 130 ohms SMD, in parallel with 5p 62 ohms 3-5W through hole), which is switched on to the pack to test IR, through a SW088R06VT N-channel MOSFET (60V 40A 9.2mΩ @20A).
 +
 +
The charger is controlled by an NXP LPC824M201JHI33E 32-bit 30 MHz Cortex M0 MCU.

Latest revision as of 17:57, 13 August 2019

This is a basic analysis of how a Ryobi 40V smart charger (model number OP403) communicates with the battery's BMS to enable the charging FET.

Electronics

Pictures of the charger PCB are below:

PCB top side.
PCB bottom side.

The wall wart adapter is a 42V 1.5A rated switching converter, listed at 84W max from AC (though output is max 63W). The wall wart does the necessary CC/CV current limiting, with a ~44.15V open circuit voltage output when no battery is connected. Output is switched to the battery though a "GS3MR HCH" diode, switched by a AP9575GH-HF P-channel MOSFET (60V 15A 90mΩ @12A).

Charging Sequence:

Battery insertion to charging start sequence.

Data detail:

Data packet detail.

The charger includes a 5V 1.5A buck based on a MP2487 (4.5-55V in, 220mOhm PFET, 1.5A max). The sticker claims 5V 2.1A output.

There is also a resistor bank of 10 ohms effective (5p 130 ohms SMD series 5p 130 ohms SMD, in parallel with 5p 62 ohms 3-5W through hole), which is switched on to the pack to test IR, through a SW088R06VT N-channel MOSFET (60V 40A 9.2mΩ @20A).

The charger is controlled by an NXP LPC824M201JHI33E 32-bit 30 MHz Cortex M0 MCU.