Dinistors. Reference data

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Dinistors. Reference data

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MAX17701 Super Capacitor Synchronous Charge Controller 16.09.2020

Maxim Integrated has released a new charge controller for supercapacitors. The MAX17701 is a high performance, high voltage synchronous buck charger controller for supercapacitors designed to operate over an input voltage range of 4,5V to 60V. It operates over an industrial temperature range of -40 to 125°C and charges the supercapacitor with DC current with +- four%. After charging the supercapacitor, the device regulates the open-circuit output voltage with an accuracy of +-4%. The output voltage is programmable from 1V to (VDCIN - 1,25V).

The MAX17701 Super Capacitor Charger Controller is designed for applications that require backup power storage with precision charging capability. It uses an external nMOSFET for short circuit protection on the power side to prevent the supercapacitor from discharging.

The MAX17701 is equipped with a Safety Timer (TMR) feature to set the maximum charge time allowed in Constant Current (CC) mode. It also contains a comparator that can be used, for example, to detect an output overvoltage event (OVI) and prevent the supercapacitor from overcharging. The MAX17701 is available in a 24mm x 4mm 4-pin TQFN package.

Key features:

Feature set optimized for charging supercapacitors:

Charge current regulation accuracy +- 4%;
Charging current measurement error (ISMON) +- 6%;
Voltage regulation accuracy +- 1%;
Programmable charge current in CC mode (ILIM);
Wide input voltage range from 4,5 to 60 V;
Adjustable output voltage range from 1,25 V to (VDCIN - 4 V);
Adjustable frequency from 125 kHz to 2,2 MHz with external clock synchronization (RT/SYNC).
Reliable operation in adverse conditions:

Input short circuit protection (GATEN);
Safety timer function (TMR);
Output overvoltage protection (OVI);
Overcurrent limit for each cycle;
Programmable EN/UVLO threshold;
Output Fault Monitoring (FLG);
Overheat protection;
Wide ambient operating temperature range from -40°C to 125°C.

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