Circuits & Schematics: power supply - 8

71. Very Low-Power Inrush-Current Limiter Protects Hot-Pluggable Apps
    Circuits Power
    .. Pezeshkian Inrush current occurs in many circuits that are hot-plugged into a power supply or battery, causing the input load capacitor to experience a sudden surge of current. This surge can ...
    Nov 10, 2010

72. High Power LED mood Lamp
    Circuits Microcontrollers Usage Light
    .. fading lamp, that looks amazing! The purpose of this page is to try to give some hints building it successful. This high power led mood light is based on PIC16F628 and the ability of this mcu to produce PWM pulses. Varying pulse width we ...
    .. pause on a desired color. Finally we will make some power dissipation measurements to help us select an appropriate power supply unit. Housing for best color diffuse You can use your imagination to find a housing that will be able to ...
    Nov 8, 2010

73. 5 volt charger adapter using LNK616PG controller
    Circuits Supply Power Power Integrations LNK616PG
    .. very simple 5 W constant voltage ,constant current (CV/CC) universal-input power supply for cell phone or similar charger applications can be designed using the LNK616PG product from the ...
    Jan 14, 2011
74. Low-Power, Battery Powered Square Wave Oscillator with Hibernation Mode
    Chau Tran
    Circuits Analogue Design Oscillators Analog Devices ADA4807-2
    .. components. Figure 1. The square wave oscillator. The circuit of Figure 1 employs an ADA4807-2 , which is a dual, low power, low noise, rail to rail voltage feedback amplifier. The first op-amp, A, is the main square waveform ...
    .. oscillate automatically. When the capacitor reaches each threshold, the charging source is switched from the negative power supply to the positive power supply and vice versa. The system is in unstable equilibrium if both the inputs and ...
    Apr 4, 2016
75. Delay Circuitry Controls Supply-Voltage Startup Sequence
    John Betten
    Circuits Supply Vishay SI2308DS Si2337DS
    .. several negative and/or positive voltages. The larger voltages are generally used to ring the phone, and the lower voltages power the phone while it's off-hook. As an example, consider a design that requires output voltages of 51 V, +60 ...
    .. some ICs, supply voltages should be applied in a particular sequence. One example is the subscriber line interface circuit ...
    Dec 13, 2021
76. Isolated-FET Pulse Driver Reduces Size, Power Consumption
    Jaime Castelló José María Espí Rafael García-Gil
    Circuits Power APT APT40GF120JRD
    .. controlled rectifiers and inverters, matrix cycloconverters, and cascaded power stages typically comprise large numbers of power transistors, each with its own driver circuit. The circuit in ...
    .. A single transformer provides galvanic isolation, and the circuit consumes little power from its 15 V primary-side power supply. Tested satisfactorily using several MOSFETs and IGBTs with input capacitances as high as 5 nF, the driver ...
    Mar 30, 2022
77. Micropower Op Amp Drives 8-Channel 18-Bit Simultaneous Sampling ADC without Compromising Accuracy or Breaking the Power Budget
    Circuits Analogue Design Linear Technology LTC2348-18 LT6020
    .. ADC itself, often with a maximum offset spec that is well above that of the ADC. If multiple ADC channels are required, the power dissipation from these drivers quickly rises to unacceptable levels. If 18-bit precision is required (SNR, THD, ...
    .. Technology Design Note 541 The op amps used to drive 18-bit analog-to-digital converters (ADCs) typically draw as much supply current as the ADC itself, often with a maximum offset spec that is well above that of the ADC. If multiple ...
    Apr 4, 2016
78. Circuit safely applies power to ICs
    Circuits Supply Texas Instruments LM3722
    .. circuits normally monitor a microprocessor's supply voltage, asserting reset to the IC during power-up, power-down, and brownout. In this way, the circuit ensures that the supply voltage is stable before the ...
    Nov 13, 2020
79. Why limit your power supply's input range?
    Circuits Supply Texas Instruments TPS61042DRBT
    .. only a cursory look at the input-voltage ratings of your power-supply IC can limit the usable input-voltage range. With careful examination of an IC's operating ...
    Sep 28, 2021
80. Voltage Down-Converter Lets Two-Cell LiPo Battery Power 6-V Devices
    Circuits Supply Power
    .. Martin Lithium-polymer (LiPo) batteries have a higher power density than most other battery technologies. They also deliver a higher nominal voltage per cell: 3.7 V ...
    .. switched dc waveform, such as lamps, relays, some motors, and small heaters. It is not a regulated and filtered power supply. Comparator U1a, one of four in the LM339 , is connected as an astable multivibrator that free-runs at ...
    May 5, 2011

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