The circuit below will trickle charge a four cell pack of AA or AAA NiMH batteries. The circuit draws current from the +5v available a USB connection and pumps about 70ma of current into the battery.

Charge pump circuits represent a pivotal technology in modern power management systems, utilising capacitors switched at high frequencies to convert a low input voltage into a higher, regulated output ...

The voltage doubler described in this Design Idea is a modification of the Dickson charge pump. Unlike that circuit, it needs no DC input voltage, but only a digital clock whose peak value is ideally ...

What is a charge pump? A charge pump provides dc-dc voltage conversion using a switch network to charge and discharge two or more capacitors. The basic charge pump switch network toggles between ...

An electronic circuit that uses capacitors in series to increase the DC source voltage when needed. For example, in EEPROM and flash memory chips, charge pumps create a higher voltage to erase the ...

The Charge Pump (CP) based Phase-Locked Loop (PLL) includes a Phase Frequency Detector (PFD), a CP, a Low Pass Filter (LPF), a Voltage Controlled Oscillator (VCO) and a DIVider (DIV). A high current ...

Typically, efficiency considerations drive a designer's final decision when selecting an application's battery-power-management strategy. The choices for this strategy are switched-power converters ...