Having been named as a UBM Electronics ACE Awards 2012
Finalist for “Energy Technology of the Year,” MAX17710 always delivers
optimal tools.
Avnet onDemand has added a video to its channel explaining
the ample benefits of MAX17710. Advantages listed in the MAX17710 video
include, but are not limited to:
- a complete system for charging and protecting micropower-storage cells,
- the IC can manage poorly regulated sources, and
- the device also includes a boost regulator circuit for charging the cell from a source as low as 0.75V (typ). An internal regulator protects the cell from overcharging.
Simply put, MAX17710 makes charging and protecting painless.
To make the process easy, you can place an order immediately
or continue gathering information after the video.
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Hi! I recently purchased the MAX17710 and I am going to use it to charge the MEC201-7P from Infinite Power Solutions. I currently have an rf to dc converter which outputs voltages typically from 5 to 7 volts. Do I still need to use the boost circuit of the PMIC? How long would it possibly charge the MEC having 0.7mAh capacity? Thank you!
No, you don’t need to use the boost. When the harvested power source is >4V, it is meant to be directly tied to CHG pin. It will then directly charge the MEC through internal switch. If the voltage is too high, it will internally regulated to 4.15V before connect to MEC. HOWEVER, CHG pin has an internal shunt that will be activated at 5.2V. The absolute maximum voltage CHG pin can handle is 6V (from datasheet). Your 5~7V input is too high. How much current do you think your dc converted source can provide? CHG internal shunt can handle 50mA. To protect max17710, you need to reduce this input voltage (through a diode maybe). Also, it is better to control it to be below 5.2V because you don’t want your energy get wasted in the shunt. You could also damage the shunt if current is >50mA.
The charging time is mainly depend on how much current your source can provide. Since MAX1710 is a linear charger, the input current directly reflect to be the charger current provided that the shunt is not activated.