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MAX16801A/B/MAX16802A/B Offline and DC-DC PWM Controllers for High-Brightness LED Drivers General Description
MAX16801A/B/MAX16802A/B Offline and DC-DC PWM Controllers for High-Brightness LED Drivers General Description

... When in the bootstrapped mode with a transformer (Figure 5), the circuit is protected against most output short-circuit faults when the tertiary voltage drops below +10V, causing the UVLO to turn off the gate drive of the external MOSFET. This re-initiates a startup sequence with soft-start. When th ...
Chapter 28
Chapter 28

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... conditions are met (see Figure 6): • An external power source is connected AND the cell voltage is above 2.5V. • The cell voltage falls to the restart threshold, 4.0V in the MAX1898EUB42, or 3.9V for the MAX1898EUB41. • The IC is reset by driving the EN/OK pin low and then high again. ...
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... Infineon Technologies Office (www.infineon.com). ...
SGA7489Z 数据资料DataSheet下载
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... infringement of patents, or other rights of third parties, resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time with ...
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... The NTE27C64has a standby mode which reduces the active current from 30mA to 100µA. The NTE27C64 is placed in the standby mode by applying a CMOS high signal to the E input. When in the standby mode, the outputs are in a high impedance state, independent of the G input. Two Line Output Control: Beca ...
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... The TPS2561A-Q1 is a dual-channel, current-limited power-distribution switch using N-channel MOSFETs for automotive applications where short circuits or heavy capacitive loads will be encountered. This device allows the user to program the current-limit threshold between 250 mA and 2.8 A (typ) per c ...
2. Network theorems
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... This theorem provides a mathematical technique for replacing a linear two terminal network by a voltage source in series with resistance Rth. According to Thevenin’s theorem “Any linear two terminal network, containing energy source and resistances, can be replaced by an equivalent circuit consistin ...
Resistors in Series and Parallel DI lab
Resistors in Series and Parallel DI lab

... the first, this will further slow down traffic. The two consecutive bridges create more resistance than a single bridge. Calculating the total resistance for an electric circuit can be done using Ohm’s law. By measuring the current leaving the source of potential (battery) and also measuring the tot ...
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... ground by an internal N-channel MOSFET which is capable of driving an LED. When the charge current drops below the End-of-Charge threshold for more than 120µs, the N-channel MOSFET turns off and a weak 25µA current source to ground is connected to the CHRG pin. This weak 25µA pull-down remains until ...
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...  To rewrite currents in terms of node voltages.  The difference in the node voltages across a resistor is equal to its resistance times the current flowing through the resistor.  Ohm’s Law does not apply to current or voltage sources. So we can not rewrite IV or II. ...
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... ideal ammeter would present no resistance to a circuit. Real multimeters do not achieve this ideal, so their readings will very closely match theoretical, calculated values for a circuit, but never with absolute precision. ...
10ppm/°C, 1μA, 1.25V Shunt Voltage Reference
10ppm/°C, 1μA, 1.25V Shunt Voltage Reference

... A 0.1µF load capacitor is recommended to maintain stability under varying load conditions. A minimum 0.01µF load capacitor is required for stable operation. Start-up time for the REF1112 will be affected, depending on the value of load capacitance and the bias currents being used. A 1µF power-supply ...
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Current mirror

A current mirror is a circuit designed to copy a current through one active device by controlling the current in another active device of a circuit, keeping the output current constant regardless of loading. The current being 'copied' can be, and sometimes is, a varying signal current. Conceptually, an ideal current mirror is simply an ideal inverting current amplifier that reverses the current direction as well or it is a current-controlled current source (CCCS). The current mirror is used to provide bias currents and active loads to circuits. It can also be used to model a more realistic current source (since ideal current sources don't exist).The circuit topology covered here is one that appears in many monolithic ICs. It is a Widlar mirror without an emitter degeneration resistor in the follower (output) transistor. This topology can only be done in an IC as the matching has to be extremely close and cannot be achieved with discretes.Another topology is the Wilson mirror. The Wilson mirror solves the Early effect voltage problem in his design.
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