charge pump


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charge pump

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 floating gates before rewriting them. See voltage multiplier.


A Voltage Doubler Pump
These circuit diagrams show how switches S1 and S2 flip the voltage to the positive side of capacitor C1 to charge it to 5v and then to the negative side to multiply the voltage to 10v. The charge at C2 is available to another circuit (Vout) or to a resistance load (RL). If more voltage were required, the output of C2 would go to a third capacitor and so on. The switches are actually transistors, but the circuit symbols for the transistors are simplified in this diagram.
References in periodicals archive ?
The CAT3643 is the only charge pump available in an eXtra-thin 2.
May 18 /PRNewswire/ -- Advanced Analogic Technologies, Inc, (AnalogicTech), a developer of innovative power management solutions, announced today the AAT3190, a new charge pump controller which provides regulated positive and negative voltage biases for portable applications.
NASDAQ:CATS) a supplier of analog, mixed-signal and non-volatile memory semiconductors, announced that analogZONE has selected Catalyst's Quad-Mode[TM] CAT3636 adaptive fractional charge pump as a winner of the analogZONE 2006 "Product of the Year" award in the "Most Innovative LED Driver" category.
The MUSBPHY provides an optional integrated charge pump to reduce cost and board space requirements.
DALLAS, March 30 /PRNewswire/ -- Extending efforts to support every power requirement for next-generation portable color displays, Texas Instruments Incorporated (TI) announced today its first organic light emitting diode (OLED) display power conversion integrated circuit (IC) and a new white LED charge pump for backlight applications.
PowerTrimPaK IP Blocks LTRIM's PowerTrimPaK includes the following available IP blocks: - Battery Charge Monitoring(x) - Battery Charger(x) (with laser tunable RSENS) - Charge Pump Converter for Flash Memory Voltage - Charge Pump Converter for LED or LCD Supply - DC-DC Buck/Boost Converter - DC-DC Buck - step down converter - DC-DC Boost - step up converter - Inverted Charge Pump Converter for memory Back Bias - LDO (Low Drop Out) Voltage Regulator(x) - Power Management Controller (digital) - Reverse Battery Protection - Temperature Sensor(x) - Voltage References(x) (x)IP blocks that can be further tuned with LTRIM's laser fine-tuning to achieve better accuracy and performance.
Existing charge pump solutions, for example, have a power efficiency rating as low as 40 percent under low battery voltage conditions, which means that less than half of the input power is converted to output power, thereby further draining the battery.
California Micro Devices (Nasdaq: CAMD), today announced the industry's first integrated charge pump and linear low dropout regulator solution for high-quality audio applications in notebook PCs and consumer electronics.
NCP5602 and NCP5612 Charge Pump White LED Drivers Feature Programmable Dimming, Achieve 87 Percent Peak Efficiency and Deliver Consistent Brightness for Handheld and Consumer Applications
All devices in the AAT3151/2/3/6 family require only four external components: two small 1uF ceramic capacitors for the charge pump flying capacitors, one 1uF ceramic input capacitor, and one 0.
SEMTECH'S HIGHLY-INTEGRATED CHARGE PUMP PLATFORM PROVIDES SMALLEST SOLUTION FOR LCD BACKLIGHT, LED FLASH AND CAMERA MODULE POWER IN CELLULAR PHONES