# charge pump efficiency equation

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• ### Calculating Essential Charge-Pump Parameters |

2006-7-1 · Finally, we calculate the charge-pump circuit's efficiency. By definition, efficiency equals power delivered to the output divided by power consumed at the input. Since we have a device that is switching and whose voltage waveforms vary with time, we are interested in the ratio of the average power at input and output, as opposed to the ratio of instantaneous powers.

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• ### Pump Efficiency - an overview | ScienceDirect Topics

The equation for calculating the pump efficiency is expressed as follows: (5-42) EFF = ( 80 − 0.2855 H + 3.78 × 10 − 4 H Q − 2.38 × 10 − 7 H Q 2 + 5.39 × 10 − 4 H 2 − 6.39 × 10 − 7 H 2 Q + 4 × 10 − 10 H 2 Q 2 ) ( 1 100 )

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• ### charge pump - power efficiency's definition - Electrical ...

2021-2-6 · To go back to your equation. The input power (what goes in) is equal to the output power (what goes out) plus the imperfection of the system (what is lost). P_{in} = P_{out} + P_{loss} You merely change P_{in} in your first equation (\frac{P_{out}}{P_{in}}) to get your second equation.

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• ### Clever Circuit Improves Efficiency of Charge Pump

2020-8-17 · Divide-By-2 Inverting Charge Pump Circuit. Positive Supply: 15V linear regulated to 5V = 33% efficient; Negative Supply: 15V inverted and divided by 2; V OUT = 6.25V. In Case 2, the charge pump is slightly less efficient due to the Schottky diodes, but the linear regulator efficiency increases to approximately 80%, greatly increasing overall efficiency.

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• ### Discrete Charge Pump Design

2011-8-6 · cycle for the switch node can be found using Equation 1. (1) Where: h= converter efficiency at a specified load The duty cycle is important in the charge pump application because it places different charge times on the flying and storage capacitors. Additionally, the duty cycle increases with lower efficiency values. 2 Charge Pump Doubler Circuit

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• ### An Optimum Design of Clocked AC-DC Charge Pump

Two different definitions for power efficiency were used for comparison: (1) the ratio of DC output power of a clocked AC-DC charge pump (P OUT CP) to the maximum available output power of VET (P OUT_MAX ET), i.e., overall power efficiency η SYS ≡ P OUT CP /P OUT_MAX ET; (2), the ratio of P OUT CP to the input power of the charge pump (P IN CP), i.e., charge pump power efficiency η CP ≡ P …

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• ### What is a charge pump and why is it useful? (Part 1)

2017-3-31 · Charge pump efficiency is fairly high, in the range of 90 to 95%. Part 2 looks at some additional aspect of charge pumps, including their capacitors, non-doubling variations, internal and external clocks, filtering and regulation, and embedded charge pumps.

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• ### SP7685 1.2A Buck/Boost Charge Pump

Charge Pump Equivalent Resistance (x2 mode) 4ΩV FB = 0.0V, V IN= 3.6V Charge Pump Equivalent Resistance (x1 mode) 0.4 0.7 Ω V IN = 3.6V FB Reference Voltage 45 50 55 mV ♦ FLASH = GND 138 150 162 mV ♦ FLASH = High, R SET = 53.6kΩ. FB Reference Voltage Range 100 400 mV ♦ FLASH = High. Guaranteed by design. FB Pin Current 0.5 μA V FB = 0.3V

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• ### Guide to Integrated Charge Pump DC-DC Conversion

2021-5-13 · Figure 4. This regulated charge pump maintains a constant switching frequency. The IC's internal switching frequency is controlled with current into its shutdown pin. The governing equation is taken from the device's data sheet: R EXT = 45000(V IN - 0.69V)/f …

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• ### Design of High Efficiency Step-Down Switched Capacitor

2005-3-1 · At time nT, the charge pump stays at the end of the gain phase, and the charges in the capacitors Ch and Cf are Qch(nT) =Ch*Vout(nT) (3.1) Qcf (nT) =Cf *Vout(nT) (3.2)

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• ### TC1240/TC1240A - Microchip Technology

2012-11-29 · EQUATION 5.2 Charge Pump Efficiency The overall power efficiency of the charge pump is affected by four factors: 1. Losses from power consumed by the internal oscillator, switch drive, etc. (which vary with input voltage, temperature and oscillator frequency). 2. I2R losses due to the on-resistance of the MOSFET switches on-board the charge ...

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• ### Pump Efficiency - an overview | ScienceDirect Topics

In this equation • the pump efficiency depends on the pump flow rate Q pump (which is equal to the demanded flow rate) and in the case of variable speed operation on the rotational speed n (see Sections 4.2 and 5.2 Section 4.2 Section 5.2). in the case of a grid-fed motor the drive efficiency η drive is equal to the motor efficiency η motor and depends on the mechanical power P mech (see ...

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• ### Efficiency of Innovative Charge Pump versus Clock ...

2016-10-20 · MOSFETs sizes and theirs influence to efficiency and the output voltage. Complex optimization of the charge pump circuit will follow in further text. Keywords: 2-phase Charge Pump, non-volatile memory, efficiency, switch size determination. 1. INTRODUCTION. The Dickson Charge Pump (DCP) [1] belongs to well-known charge pump architectures.

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• ### Power Efficiency Optimization of Fully Integrated Dickson ...

2010-5-21 · The power efficiency can then be calculated by evaluating the following equation: intot I cc V out I out V, ⋅ ⋅ η= If the number of charge pump stages n is large enough, meaning that n + 1 n, the expression for the power efficiency becomes: out I cc f C V cc f CV out I cc V T V ⋅ ⋅ ⋅ + ⋅ ⋅ − − ≅ α η 1 1

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• ### Charge-Pump and Step-Up DC-DC Converter Solutions

2012-8-28 · charge-pump and inductor step-up converter solutions for powering white LEDs in series or parallel configurations. Regulated-voltage or regulated-current controllers are used. Trade-offs in size, efficiency, battery life, and LED-matching are discussed. ... In Equation 1 substitute the desired operating current, I, the nominal voltage for VD at ...

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• ### Gate control strategies for high efficiency charge

Simulations of 8-stage charge pumps in a 0.13 μm standard CMOS technology show that for an input supply voltage of 1.2 V, the proposed charge pump circuit reaches a power efficiency of 58.72% ...

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• ### (PDF) A dynamic analysis of the Dickson charge pump

An output voltage-current equation of charge pump DC-DC voltage multiplier using diodes is provided to cover wide clock frequency and output current ranges for designing energy harvester operating ...

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• ### Voltage Doubler Design and Analysis - TI.com

2011-12-10 · consumed by the charge pump circuitry. Equation (3)shows the charge transfer relation. Transfer Loss Cext ∆VP =QTransfer =Cloop ∆Vloop (3) When current is demanded to change the loop voltage, some current is lost to overhead. The ratio of overhead current to the actual current delivered to the loop filter is referred to as the efficiency ...

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• ### Guide to Integrated Charge Pump DC-DC Conversion

2021-5-13 · Regulated-Charge-Pump Design Idea An improved design for maintaining a switching frequency that is constant and independent of the input voltage is shown in Figure 4. Figure 4. This regulated charge pump maintains a constant switching frequency. The IC's internal switching frequency is controlled with current into its shutdown pin.

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• ### SP7685 1.2A Buck/Boost Charge Pump

The SP7685 is a current-regulated charge pump ideal for powering high brightness LEDs for camera flash applications. The charge pump can be set to regulate two current levels for FLASH and TORCH modes. The SP7685 automatically switches modes between step-up and step-down ensuring that LED current does not depend on the forward voltage. A low

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• ### Pump Efficiency - an overview | ScienceDirect Topics

In this equation • the pump efficiency depends on the pump flow rate Q pump (which is equal to the demanded flow rate) and in the case of variable speed operation on the rotational speed n (see Sections 4.2 and 5.2 Section 4.2 Section 5.2). in the case of a grid-fed motor the drive efficiency η drive is equal to the motor efficiency η motor and depends on the mechanical power P mech (see ...

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• ### efficiency - Can a charge-pump be 100% efficient,

2021-4-6 · In our charge pump there is not infinite charging/discharging time so resistance does affect efficiency but as resistance tends to zero efficiency (for a finite voltage difference) tends towards a finite number less than 100%. The charge transferred on each switching cycle is related to the change in voltage on the capacitor by the capacitance.

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• ### TC1240/TC1240A - Microchip Technology

2012-11-29 · EQUATION 5.2 Charge Pump Efficiency The overall power efficiency of the charge pump is affected by four factors: 1. Losses from power consumed by the internal oscillator, switch drive, etc. (which vary with input voltage, temperature and oscillator frequency). 2. I2R losses due to the on-resistance of the MOSFET switches on-board the charge ...

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• ### Power Efficiency Optimization of Fully Integrated Dickson ...

2010-5-21 · The power efficiency can then be calculated by evaluating the following equation: intot I cc V out I out V, ⋅ ⋅ η= If the number of charge pump stages n is large enough, meaning that n + 1 n, the expression for the power efficiency becomes: out I cc f C V cc f CV out I cc V T V ⋅ ⋅ ⋅ + ⋅ ⋅ − − ≅ α η 1 1

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• ### How To Calculate Hydraulic Pump and Motor

2015-2-2 · Overall efficiency is simply the product of volumetric and mechanical/hydraulic efficiency. So continuing with the above example, the overall efficiency of the pump is 0.9 x 0.91 x 100 = 82%. Overall efficiency is used to calculate the drive power required by a pump at a given flow and pressure.

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• ### NCP1729 - Switched Capacitor Voltage Inverter

light loads, and drops according to the equation below: VDROP Iout Rout Vout (Vin VDROP) Charge Pump Efficiency The overall power conversion efficiency of the charge pump is affected by four factors: 1. Losses from power consumed by the internal oscillator, switch drive, etc. (which vary with input voltage, temperature and oscillator frequency). 2.

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• ### es Pump Efficiency Solutions - Cal Poly

2018-4-28 · Pump Efficiency Solutions 4 keep each pump closest to its best efficiency point thus lowering the input power to each pump. The outputs of the program are simply the number of pumps that should be operating the pumps frequency. The program must be flexible enough to allow for process variation due to different pump

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• ### MAX1720 - Switched Capacitor Voltage Inverter with

loads, and drops according to the equation below: VDROP Iout Rout Vout (Vin VDROP) Charge Pump Efficiency The overall power conversion efficiency of the charge pump is affected by four factors: 1. Losses from power consumed by the internal oscillator, switch drive, etc. (which vary with input voltage, temperature and oscillator frequency). 2.

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• ### Switched Capacitor Voltage Converters

2016-11-1 · The overall power efficiency of the charge pump is affected by four factors: 1. Losses from power consumed by the internal oscillator, switch drive, etc. (which vary with input voltage, temperature and oscillator frequency). 2. I2R losses due to the on-resistance of the MOSFET switches on-board the charge pump. 3. Charge pump capacitor losses ...

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• ### Efficiency Electrolysis - Siemens

2021-4-14 · The efficiency of the electrolysis systems is critical both technically and ... thereby reducing voltage efficiency in accordance with Equation 8. ... distance the charge carriers have to traverse between the anode and the cathode, the smaller the voltage drop is,

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• ### efficiency - Can a charge-pump be 100% efficient,

2021-4-6 · In our charge pump there is not infinite charging/discharging time so resistance does affect efficiency but as resistance tends to zero efficiency (for a finite voltage difference) tends towards a finite number less than 100%. The charge transferred on each switching cycle is related to the change in voltage on the capacitor by the capacitance.

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• ### Obsolete Device TC1221/TC1222 - Microchip Technology

2014-3-25 · to the equation below: VDROP = IOUT x ROUT VOUT = – (VIN – VDROP) 4.2 Charge Pump Efficiency The overall power efficiency of the charge pump is affected by four factors: 1. Losses from power consumed by the internal oscillator, switch drive, etc. (which vary with input voltage, temperature and oscillator frequency). 2.

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• ### Power efficiency evaluation in Dickson and voltage

2006-10-1 · Dickson charge pump , , , is widely used in mixed mode circuits, smart power ICs and non-volatile memory chips to generate the required high voltages. Two cascaded stages of a CMOS integrated Dickson scheme are shown in Fig. 2.Since the maximum voltage increment provided by a single stage is (ideally) equal to V DD, a Dickson charge pump is typically obtained as the cascade …

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• ### How To Calculate Hydraulic Pump and Motor

2015-2-2 · Overall efficiency is simply the product of volumetric and mechanical/hydraulic efficiency. So continuing with the above example, the overall efficiency of the pump is 0.9 x 0.91 x 100 = 82%. Overall efficiency is used to calculate the drive power required by a pump at a given flow and pressure.

Get Price
• ### EMI-friendly Optimization of the Multiphase DC-DC ...

2016-9-11 · “All-pMOS 50-V charge pump using low voltage capacitors,” IEEE Tran. on ind. Electronics, Vol. 60, No. 10, 2013 * Capacitor Area Optimization (cont’d) Optimization target: higher output current for given capacitor area CTOT Set of equation can be written: Leading to the capacitor parameters: These equations can be inserted in the ...

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• ### Switched-Capacitor Voltage Doublers

2010-12-15 · listed in Table 1. The charge-pump output resistance is a function of C1 and C2’s ESR and the internal switch resistance, as shown in the equation for ROUT in the Efficiency Considerations section. Minimizing the charge-pump capacitor’s ESR mini-Efficiency ...

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• ### Efficiency Electrolysis - Siemens

2021-4-14 · The efficiency of the electrolysis systems is critical both technically and ... thereby reducing voltage efficiency in accordance with Equation 8. ... distance the charge carriers have to traverse between the anode and the cathode, the smaller the voltage drop is,

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• ### Well-to-Wheel Efficiency Analysis

2011-6-3 · Efficiency Well Charge Tank Fuel Tank Fuel tank at vehicle Wheel Automotive Data WG Data Evaluation WG Analysis of demonstration data Review of published demonstrated data (FY 2003 ~) Data reviewed by JEVA study (~ FY 2002) Demonstrated data are used if they are to be in public domain

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• ### Motor Efficiency, Selection, and Management

2018-3-29 · Motor Efficiency, Selection, and Management A Guidebook for Industrial Efficiency Programs In the fiercely competitive global marketplace, minimizing operational costs can mean the difference

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• ### Integrated charge excitation triboelectric

2019-3-29 · An exponential charge accumulation property is obtained for the self-charge excitation TENG (SCE-TENG), which shows ultra-fast charge excitation efficiency (reaching saturation state within 50 s ...

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• ### Algorithm for Automatic Design of Maximum-Efficiency ...

2003-5-28 · From the above equation, it can be seen that, for any given value of the charge pump parameters (number of stages and, hence, open-circuit output voltage, operating frequency, and capacitor and transistor sizes), power efficiency is a function of IOUT (more specifically, η has a maximum for an output current

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• ### Modelling of maximum power efficiency of charge

2014-8-1 · The loss estimation in a switched‐capacitor DC–DC converter has caused much controversy because of the uncertainty of the contribution of device parasitics to the power efficiency of …

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• ### Fully Integrated Dickson Charge Pumps with Optimized

2010-9-8 · charge the parasitic capacitance Cp in each stage. The parameter α is the ratio of the parasitic capacitance Cp to the nominal capacitor value C: C p C The power efficiency can then be calculated by evaluating the following equation: in tot I cc V out I out V, If the number of charge pump …

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• ### How To Calculate Hydraulic Pump and Motor

2015-2-2 · Overall efficiency is simply the product of volumetric and mechanical/hydraulic efficiency. So continuing with the above example, the overall efficiency of the pump is 0.9 x 0.91 x 100 = 82%. Overall efficiency is used to calculate the drive power required by a pump at a given flow and pressure.

Get Price
• ### es Pump Efficiency Solutions - Cal Poly

2018-4-28 · Pump Efficiency Solutions 4 keep each pump closest to its best efficiency point thus lowering the input power to each pump. The outputs of the program are simply the number of pumps that should be operating the pumps frequency. The program must be flexible enough to allow for process variation due to different pump

Get Price
• ### White LED Driver with 1X /1.5X High-Efficiency Charge

2012-10-11 · High-Efficiency Charge Pump DESCRIPTION The EUP2794 is a low noise, constant frequency charge pump that uses a dual mode load switch (1X) and fractional (1.5X) conversion to maximize efficiency for white LED applications. The EUP2794 delivers up …

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• ### DETERMINING WELL EFFICIENCY BY MULTIPLE STEP

2015-1-15 · and the value of C is the slope of the line. The equation su.IQ = 0.012 + 0.00012Q was determined from which .?«,- = 0.012Q I 0.00012ß2 which is the form of Jacob's equation (l) and is the approximate equation for the drawdown in Well NAU-3 for a pumping period of two hours. Figure 4 shows a plot of this equation and the observed

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• ### Efficiency Electrolysis - Siemens

2021-4-14 · The efficiency of the electrolysis systems is critical both technically and ... thereby reducing voltage efficiency in accordance with Equation 8. ... distance the charge carriers have to traverse between the anode and the cathode, the smaller the voltage drop is,

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• ### Getting the Most Efficiency Out of Hydraulics |

2020-3-9 · Piston pump—closed loop: In a closed loop pump system, a charge-pump feeds the oil into the hydraulic pump rather than gravity. Closed-loop systems are used in mobile equipment because the charge pressure prevents efficiency losses caused by not having enough oil coming into the pump.

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• ### INGLE-CELL REGULATED Q-PUMP DRAWS OW UIESCENT

2017-1-17 · regulated Q-pump described here, which boosts a single alkaline or NiMH cell to 2.5 V using a two-stage Q-Pump. The “wings” of a Q-pump are the flying capacitors that connect first to the input, then to the output. If the capacitor is stacked on the input voltage, it forms a voltage doubler. In the case of a regulated charge pump with a fixed

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• ### Algorithm for Automatic Design of Maximum-Efficiency ...

2003-5-28 · From the above equation, it can be seen that, for any given value of the charge pump parameters (number of stages and, hence, open-circuit output voltage, operating frequency, and capacitor and transistor sizes), power efficiency is a function of IOUT (more specifically, η has a maximum for an output current

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• ### Getting the Most Efficiency Out of Hydraulics |

2020-3-9 · Piston pump—closed loop: In a closed loop pump system, a charge-pump feeds the oil into the hydraulic pump rather than gravity. Closed-loop systems are used in mobile equipment because the charge pressure prevents efficiency losses caused by not having enough oil coming into the pump.

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• ### A robust high-efficiency cross-coupled charge pump

the charge pump eliminates all of the reversion power loss and reduces the ripple voltage. The proposed charge pump has a better performance even in scenarios where the main clock signals are mismatched. The proposed charge pump circuit was simulated using spectre in the TSMC 0.18 lm CMOS process.

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• ### Phys. Rev. B 87, 245423 (2013) - Thermoelectric ...

2013-6-19 · Charge is pumped against the bias as long as I ¯ < 0. (b) Work per unit time done on the dc source and (c) efficiency of the double-dot pump for the same pumping cycles considered in (a). The efficiency is defined according to Eq. . In all panels, U = 20 k B T, t c = 10 k B T, Γ L = Γ R = Γ 2, ℏ Γ = k B T 4, and T L = T R = T.Reuse ...

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• ### Engine Intake Charge Management - DieselNet

2020-1-22 · Abstract: Managing the supply of air and other components of the cylinder’s intake charge to the combustion chamber is an important process to ensure consistent and reliable performance of modern engines.Intake charge management encompasses all aspects that affect the quantity, composition, temperature, pressure, bulk motion and cleanliness of the cylinder’s contents at the start …

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• ### How to read and use Pump Performance Curves -

As a result, there is a point of optimal efficiency where the pump can operate at highest ratio of output power input power. This point is known as the best efficiency point for that pump and clearly visible on 'Pump Efficiency Curve' plotted on the same chart, against operating flow rate.

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• ### Design and Performance Analysis of Centrifugal Pump

stage centrifugal pump. Impeller is designed on the basic of design flow rate, pump head and pump specific speed. So, the design data are required to design the centrifugal pump. For design calculation, the design parameters are taken as follows: Flow rate, Q = 0.00293 m3/s Head, H = 10 m Pump …

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• ### Sizing Optimization and Experimental Verification of a ...

2.1. Water Pump Power Requirement Model. The reference evapotranspiration of the greenhouse crop is calculated using the following equation []: where ET 0 is the reference evapotranspiration (mm h −1), Δ is the saturation slope of the vapor pressure curve at temperature T m (kPa °C −1), R n is the monthly average daily net radiation at the grass surface (MJ m −2 h −1), G is the ...

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• ### Lithium Ion Battery Round Trip Efficiency-battery ...

2019-7-31 · Lithium ion battery round trip efficiency is the amount of energy that the battery can deliver relative to the amount of energy injected into it during the immediately presiding charge. In other words, this phenomenon can be referred to as the ratio of energy required to charge a battery compared to the available energy during discharge.

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• ### DC-DC Conversion Without Inductors - Maxim Integrated

2012-8-28 · regulator, regulated charge pump, unregulated charge pump, voltage divider, voltage doubler, regulated inverter, buck-boost, regulator, charge pump power dissipation TUTORIAL 725 DC-DC Conversion Without Inductors Jul 22, 2009 Abstract: Charge pumps are often the best choice for powering an application that requires both low power and low cost.

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