pancho_hideboo
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Ultra low Power Energy Harvester with MPPT and Charge Management IC, ADP5091/ADP5092 of ADI has cold start-up circuit.
https://www.analog.com/media/en/technical-documentation/data-sheets/ADP5091-5092.pdf
This IC operates in three stages:
(1) cold start
(2) asynchronous boost
(3) synchronous boost
Cold start can be implemented by ring oscillator.
Then Ring oscillator drive High and Low Side MOSFET for booster.
In this case, voltage boost is done bu external inductor during cold start.
However, Cold start block is denoted as "Charge Pump" in ADP5091/ADP5092.
So is this charge pump like Dickson Chargepump ?
I think external inductor is not used during cold start.
High and Low Side MOSFET for booster are dead during cold start.
TI also have similar IC, BQ25570.
https://www.ti.com/litv/pdf/slusbh2g
It seems High and Low Side MOSFET for booster are active during cold start.
How do you think this Cold Start Charge Pump work in ADP5091/ADP5092 ?
https://www.analog.com/media/en/technical-documentation/data-sheets/ADP5091-5092.pdf
This IC operates in three stages:
(1) cold start
(2) asynchronous boost
(3) synchronous boost
Cold start can be implemented by ring oscillator.
Then Ring oscillator drive High and Low Side MOSFET for booster.
In this case, voltage boost is done bu external inductor during cold start.
However, Cold start block is denoted as "Charge Pump" in ADP5091/ADP5092.
So is this charge pump like Dickson Chargepump ?
I think external inductor is not used during cold start.
High and Low Side MOSFET for booster are dead during cold start.
TI also have similar IC, BQ25570.
https://www.ti.com/litv/pdf/slusbh2g
It seems High and Low Side MOSFET for booster are active during cold start.
How do you think this Cold Start Charge Pump work in ADP5091/ADP5092 ?
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