Theory and Designs for Building a White LED Headlamp
... If efficiency of the current white LEDs does not exceed typical incandescent lamps, why bother? In a properly designed headlamp, LEDs are immune from burnout. LEDs make much more efficient use of available battery energy from nearly depleted batteries. When the current to white LEDs is reduced by ½ ...
... If efficiency of the current white LEDs does not exceed typical incandescent lamps, why bother? In a properly designed headlamp, LEDs are immune from burnout. LEDs make much more efficient use of available battery energy from nearly depleted batteries. When the current to white LEDs is reduced by ½ ...
UCC28220 数据资料 dataSheet 下载
... approximately 150 µA of current and forcing pins, SS, CS1, CS2, OUT1, and OUT2 to logic 0 states. If the VDD falls below 8 V after reaching turn-on, it will go back into this low power state. In the case of the UCC28221, the UVLO threshold is 13 V. It is 10 V for the UCC28220. Both versions have a t ...
... approximately 150 µA of current and forcing pins, SS, CS1, CS2, OUT1, and OUT2 to logic 0 states. If the VDD falls below 8 V after reaching turn-on, it will go back into this low power state. In the case of the UCC28221, the UVLO threshold is 13 V. It is 10 V for the UCC28220. Both versions have a t ...
Arrester Reference Voltage
... a DC voltage is applied to the varistor with this characteristic curve, the resulting current will be the same as if it were an impulse with a peak voltage equal to the DC voltage. The test signals used to create this curve are generally 50 or 60 Hz below an amp and impulse above an amp. Some import ...
... a DC voltage is applied to the varistor with this characteristic curve, the resulting current will be the same as if it were an impulse with a peak voltage equal to the DC voltage. The test signals used to create this curve are generally 50 or 60 Hz below an amp and impulse above an amp. Some import ...
Circuit Components Lesson 4
... Series and Parallel Combined Many circuits have a combination of series and parallel resistors. The total resistance of a circuit like this is found by reducing the different series and parallel combinations step-by step to end up with a single equivalent resistance for the circuit. This allows the ...
... Series and Parallel Combined Many circuits have a combination of series and parallel resistors. The total resistance of a circuit like this is found by reducing the different series and parallel combinations step-by step to end up with a single equivalent resistance for the circuit. This allows the ...
Lecture 07 DC and AC Load Line
... the transistor, IC and VCE will both vary around their Q-point values. • When the Q-point is centered, IC and VCE can both make the maximum possible transitions above and below their initial dc values. • When the Q-point is above the center on the load line, the input signal may cause the transistor ...
... the transistor, IC and VCE will both vary around their Q-point values. • When the Q-point is centered, IC and VCE can both make the maximum possible transitions above and below their initial dc values. • When the Q-point is above the center on the load line, the input signal may cause the transistor ...
Lecture 07 DC and AC Load Line - Department of EE
... the transistor, IC and VCE will both vary around their Q-point values. • When the Q-point is centered, IC and VCE can both make the maximum possible transitions above and below their initial dc values. • When the Q-point is above the center on the load line, the input signal may cause the transistor ...
... the transistor, IC and VCE will both vary around their Q-point values. • When the Q-point is centered, IC and VCE can both make the maximum possible transitions above and below their initial dc values. • When the Q-point is above the center on the load line, the input signal may cause the transistor ...
MAX5976A/MAX5976B 2.7V to 18V, 7A, Hot-Swap Solution General Description Features
... The current through the internal power MOSFET is compared to a circuit-breaker threshold. An external resistor between CB and ground sets this threshold. The circuit-breaker comparator is designed so that the load current can exceed the threshold for some amount of time before tripping. The time del ...
... The current through the internal power MOSFET is compared to a circuit-breaker threshold. An external resistor between CB and ground sets this threshold. The circuit-breaker comparator is designed so that the load current can exceed the threshold for some amount of time before tripping. The time del ...
4.5 V to 42 V Input, 5 A, Step Down DC
... The TPS54540-Q1 is a 42 V, 5 A, step-down (buck) regulator with an integrated high side n-channel MOSFET. The device implements constant frequency, current mode control which reduces output capacitance and simplifies external frequency compensation. The wide switching frequency range of 100 kHz to 2 ...
... The TPS54540-Q1 is a 42 V, 5 A, step-down (buck) regulator with an integrated high side n-channel MOSFET. The device implements constant frequency, current mode control which reduces output capacitance and simplifies external frequency compensation. The wide switching frequency range of 100 kHz to 2 ...
Physics 12 to 15 - Dominican
... Syllabus OP49 Test electrical conduction in a variety of materials, and classify each material as a conductor or insulator OP50 Set up a simple electric circuit, use appropriate instruments to measure current, potential difference (voltage) and resistance, and establish the relationship between them ...
... Syllabus OP49 Test electrical conduction in a variety of materials, and classify each material as a conductor or insulator OP50 Set up a simple electric circuit, use appropriate instruments to measure current, potential difference (voltage) and resistance, and establish the relationship between them ...
ADC slides
... Wait for ADDAT Read Mode - start a conversion automatically when the previous result is read ...
... Wait for ADDAT Read Mode - start a conversion automatically when the previous result is read ...
Quiz2_0908
... Two wires, A and B, and a variable resistor, R, are connected in series to a battery. Which one of the following results will occur if the resistance of R is increased? A) The current through A and B will increase. B) The voltage across A and B will increase. C) The voltage across the entire circuit ...
... Two wires, A and B, and a variable resistor, R, are connected in series to a battery. Which one of the following results will occur if the resistance of R is increased? A) The current through A and B will increase. B) The voltage across A and B will increase. C) The voltage across the entire circuit ...
LTM8025 - 36V, 3A Step-Down uModule Converter
... To further optimize efficiency, the LTM8025 automatically switches to Burst Mode® operation in light load situations. Between bursts, all circuitry associated with controlling the output switch is shut down reducing the input supply current to 50μA in a typical application. The oscillator reduces the ...
... To further optimize efficiency, the LTM8025 automatically switches to Burst Mode® operation in light load situations. Between bursts, all circuitry associated with controlling the output switch is shut down reducing the input supply current to 50μA in a typical application. The oscillator reduces the ...
MICROCONTROLLER BASED POWER FACTOR CORRECTION A
... associated with motors and transformers. An incandescent bulb would have a power factor of close to 1.0. A one hp motor has power factor about 0.80. With low power factor loads, the current flowing through electrical system components is higher than necessary to do the required work. These results i ...
... associated with motors and transformers. An incandescent bulb would have a power factor of close to 1.0. A one hp motor has power factor about 0.80. With low power factor loads, the current flowing through electrical system components is higher than necessary to do the required work. These results i ...
Analytical Approach to Design of the Proportional-to-the-Absolute-Temperature
... parameters obtained by the parameter extraction procedures. This section emphasises description of the model part dealing with temperature dependences which influence the collector output (transfer) current and hence should be taken into account in the derivation of the CM currents. The equivalent H ...
... parameters obtained by the parameter extraction procedures. This section emphasises description of the model part dealing with temperature dependences which influence the collector output (transfer) current and hence should be taken into account in the derivation of the CM currents. The equivalent H ...
![1/2" [12.7 mm] Size 5 Diameter Hall Effect Precision](http://s1.studyres.com/store/data/004042290_1-85837aa989ab668504945c657226c3e2-300x300.png)
1/2" [12.7 mm] Size 5 Diameter Hall Effect Precision
... Torque - Starting/Running: Aerospace - Sealed Commercial - Un-sealed Axial Play: ...
... Torque - Starting/Running: Aerospace - Sealed Commercial - Un-sealed Axial Play: ...
MAX5100 +2.7V to +5.5V, Low-Power, Quad, Parallel General Description
... Row and column decoders select the appropriate tab from the resistor string to provide the needed analog voltages. The resistor network converts the 8-bit digital input into an equivalent analog output voltage in proportion to the applied reference voltage input. The resistor string presents a code- ...
... Row and column decoders select the appropriate tab from the resistor string to provide the needed analog voltages. The resistor network converts the 8-bit digital input into an equivalent analog output voltage in proportion to the applied reference voltage input. The resistor string presents a code- ...
DS1868 - Maxim Integrated
... These two 8-bit values are written to a 17-bit I/O shift register which is used to store the two wiper positions and the stack select bit when the device is powered. A block diagram of the DS1868 is presented in Figure 1. Communication and control of the DS1868 is accomplished through a 3-wire seria ...
... These two 8-bit values are written to a 17-bit I/O shift register which is used to store the two wiper positions and the stack select bit when the device is powered. A block diagram of the DS1868 is presented in Figure 1. Communication and control of the DS1868 is accomplished through a 3-wire seria ...
Compact dual output point of load converter based on the PM6680
... The PM6680 contains all the control circuitry needed to implement two independent stepdown synchronous buck regulators using the constant on-time method. The constant ontime method, an improved variant of hysteretic control, provides superior transient response to changes of input voltage and load l ...
... The PM6680 contains all the control circuitry needed to implement two independent stepdown synchronous buck regulators using the constant on-time method. The constant ontime method, an improved variant of hysteretic control, provides superior transient response to changes of input voltage and load l ...
Operational amplifier
An operational amplifier (""op-amp"") is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output. In this configuration, an op-amp produces an output potential (relative to circuit ground) that is typically hundreds of thousands of times larger than the potential difference between its input terminals.Operational amplifiers had their origins in analog computers, where they were used to do mathematical operations in many linear, non-linear and frequency-dependent circuits. The popularity of the op-amp as a building block in analog circuits is due to its versatility. Due to negative feedback, the characteristics of an op-amp circuit, its gain, input and output impedance, bandwidth etc. are determined by external components and have little dependence on temperature coefficients or manufacturing variations in the op-amp itself.Op-amps are among the most widely used electronic devices today, being used in a vast array of consumer, industrial, and scientific devices. Many standard IC op-amps cost only a few cents in moderate production volume; however some integrated or hybrid operational amplifiers with special performance specifications may cost over $100 US in small quantities. Op-amps may be packaged as components, or used as elements of more complex integrated circuits.The op-amp is one type of differential amplifier. Other types of differential amplifier include the fully differential amplifier (similar to the op-amp, but with two outputs), the instrumentation amplifier (usually built from three op-amps), the isolation amplifier (similar to the instrumentation amplifier, but with tolerance to common-mode voltages that would destroy an ordinary op-amp), and negative feedback amplifier (usually built from one or more op-amps and a resistive feedback network).