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TP4056
TP4056

... Vcc(Pin 4): Positive Input Supply Voltage VIN is the power supply to the internal circuit. When VIN drops to within 30mv of the BAT pin voltage, TP4056 enters low power sleep mode, dropping BAT pin’s current to less than 2uA. BAT(Pin5): Battery Connection Pin. Connect the positive terminal of the ba ...
BU941ZP
BU941ZP

... BU941ZP BU941ZPFI ...
NUBM05 - Laser Module Laser Module
NUBM05 - Laser Module Laser Module

...  The LD Bank described in this brochure is intended to be used for ordinary electronic equipment (such as office equipment, communications equipment, measurement instruments and household appliances). Consult Nichia’s sales staff in advance for information on the applications in which exceptional q ...
The Two-Phase, Full-Wave Rectifier
The Two-Phase, Full-Wave Rectifier

AN729: Replacing Traditional Optocouplers with Si87xx Digital
AN729: Replacing Traditional Optocouplers with Si87xx Digital

Detectores de metais portateis
Detectores de metais portateis

... Security inspection of customs, public securities. ...
LP-18BC Desk Top Power Supply Owners Guide
LP-18BC Desk Top Power Supply Owners Guide

... DuraComm warrants to the initial end user, each power supply manufactured by DuraComm to be free from defects in material and workmanship, when in normal use and service for a period of three years from the date of purchase, from an authorized DuraComm dealer. Should a product manufactured by DuraCo ...
U3e L8 3-12 Electricity and Magnetism 1
U3e L8 3-12 Electricity and Magnetism 1

MAX16838 Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Controller
MAX16838 Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Controller

... An internal current-mode switching DC-DC controller supports the boost or SEPIC topologies and operates in an adjustable frequency range between 200kHz and 2MHz. The current-mode control provides fast response and simplifies loop compensation. The MAX16838 also features an adaptive output-voltage ad ...
Evaluates:  MAX1873 MAX1873 Evaluation Kit General Description Features
Evaluates: MAX1873 MAX1873 Evaluation Kit General Description Features

... removed from jumper JU1, because it is pulled up to VREF through resistor R8 (10kΩ). Refer to Table 1 for JU1 configurations. To set the charge current at the ICHG/EN pin, replace the voltage-divider resistors R8 and R9 so that the input voltage is set between 700mV and VREF. An external op amp or D ...
RF-UNIT-V
RF-UNIT-V

... - If magnetic field greater than critical value, then electron return to cathode without reaching of anode ...
TRANSFORMER TYPES Potential Transformers
TRANSFORMER TYPES Potential Transformers

intake structures uptake 316(b) regulations
intake structures uptake 316(b) regulations

... current”. This is a true statement. It’s important to understand how much, or in reality, how little current it takes to affect the human body. Approximately, 10% of occupational deaths each year are the result of electrical “contacts”. Many of these electrocutions are the result of electrical feedb ...
3D ICs: An Opportunity for Fully-Integrated, Dense and - Hal-CEA
3D ICs: An Opportunity for Fully-Integrated, Dense and - Hal-CEA

... well studied to alleviate this problem. This approach offers easier on-chip integration thanks to the high capacitance density in recent CMOS technologies [2], [11]. However, SCCs also have different drawbacks such as efficiency dependence on conversion ratio and large input current pulse i.e. a pot ...
BUL741
BUL741

... High voltage fast-switching NPN power transistors Features ...
MAX4880 Overvoltage-Protection Controller with Internal Disconnect Switch General Description
MAX4880 Overvoltage-Protection Controller with Internal Disconnect Switch General Description

... with an internal current-limited switch that can be configured as a low-cost battery charger. When the input voltage exceeds the overvoltage trip level (5.7V), or drops below the undervoltage-lockout level (4.2V), the MAX4880 turns off the external n-channel MOSFET and asserts an undervoltage/overvo ...
Unit 43: Current, voltage and resistance Dr. Basil Hamed Technical
Unit 43: Current, voltage and resistance Dr. Basil Hamed Technical

... transformers, which reduce its voltage and increase its amperage. The supply may be stepped up to over 400,000 volts at the point where it enters the large transmission lines (long-distance power lines) leaving the power station. It is normally then stepped down in stages, first passing through a wi ...
High Voltage Gain Interleaved Boost Converter
High Voltage Gain Interleaved Boost Converter

1. General Description General Features
1. General Description General Features

... 5. The voltage above Vs should be applied to the lamps for more than 1second for start-up. Otherwise, the lamps may not be turned on. 6. The output of the inverter must have symmetrical(negative and positive) voltage waveform and symmetrical current waveform.(Unsymmetrical ratio is less than 10%) Pl ...
Using Digital Potentiometers in Adjustable Step-Down DC-DC
Using Digital Potentiometers in Adjustable Step-Down DC-DC

... 2. The potentiometer signals of the DS3903 are allowed to operate from 0V to 5.5V as long as the DS3903 is powered, independent of the DS3903's VCC supply level. Most digital potentiometers require the potentiometer terminals to remain between 0V and VCC. This would require the output voltage of the ...
6 – 10 Watt Stereo Audio Amplifier (Code 3143)
6 – 10 Watt Stereo Audio Amplifier (Code 3143)

... Follow the printed circuit overlay with reference to the circuit diagram where necessary. Add the lowest height components to the board first, starting with the resistors. Be careful to get the electrolytic capacitors in the correct way around and all parts in their correct positions. Be careful whe ...
Experiment to verify Faraday’s Law of Electro-Magnetic- Induction 7EM
Experiment to verify Faraday’s Law of Electro-Magnetic- Induction 7EM

Data Sheet  Features
Data Sheet Features

... The AP3032 is a boost DC-DC converter which uses a constant frequency, current mode control scheme to provide excellent line and load regulation. Operation can be best understood by referring to the Figure 21. At the start of each oscillator cycle, switch Q1 turns on. The switch current will increas ...
LUMARK®
LUMARK®

... FL-1=Fixture Loop SHK=Hook with Safety Screw PC3=3' Cord with NEMA Plugs (120V-L515P, 208V-L6-15P, 240V-L6-15P, 277V-L7-15P, 347V-L37-20P and 480V-L8-20P) Other Lengths Available. Requires FH-1 or FL-1. Use with ...
Simulation Using WinSPICE - West Virginia University
Simulation Using WinSPICE - West Virginia University

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Buck converter



A buck converter is a voltage step down and current step up converter.The simplest way to reduce the voltage of a DC supply is to use a linear regulator (such as a 7805), but linear regulators waste energy as they operate by dissipating excess power as heat. Buck converters, on the other hand, can be remarkably efficient (95% or higher for integrated circuits), making them useful for tasks such as converting the main voltage in a computer (12V in a desktop, 12-24V in a laptop) down to the 0.8-1.8V needed by the processor.
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