MAX1687 Step-Up DC-DC Converters with Precise, Adaptive Current Limit for GSM General Description
... The MAX1687/MAX1688 step-up DC-DC converters deliver up to 2W from a single Li-Ion or three NiMH cells. The devices are ideal for burst-load applications such as GSM cell phones and wireless LANs, where the RF power amplifiers require short, high current bursts. The MAX1687/MAX1688 reduce battery su ...
... The MAX1687/MAX1688 step-up DC-DC converters deliver up to 2W from a single Li-Ion or three NiMH cells. The devices are ideal for burst-load applications such as GSM cell phones and wireless LANs, where the RF power amplifiers require short, high current bursts. The MAX1687/MAX1688 reduce battery su ...
LT1575/LT1577 - Ultrafast Transient Response
... The current generation of microprocessors place stringent demands on the power supply that powers the processor core. These microprocessors cycle load current from near zero to amps in tens of nanoseconds. Output voltage tolerances as low as ±100mV include transient response as part of the specifica ...
... The current generation of microprocessors place stringent demands on the power supply that powers the processor core. These microprocessors cycle load current from near zero to amps in tens of nanoseconds. Output voltage tolerances as low as ±100mV include transient response as part of the specifica ...
Efficient Excitation Signals for the Fast Impedance Spectroscopy
... Research and Education through the institutional funding IUT19-11. ...
... Research and Education through the institutional funding IUT19-11. ...
Design Example –7.1.
... conventional way to satisfy (at least to approach to) this condition is to use a low loss (high Q) resonance circuit as the resonator of the oscillator. For on-chip resonance circuits there is a possibility to equate ω(max) and ω(Re). It can be seen from (7.4) that for rC rL , ω(Re) becomes equal ...
... conventional way to satisfy (at least to approach to) this condition is to use a low loss (high Q) resonance circuit as the resonator of the oscillator. For on-chip resonance circuits there is a possibility to equate ω(max) and ω(Re). It can be seen from (7.4) that for rC rL , ω(Re) becomes equal ...
Single-Cell Li-Ion Charge Mgmt IC w/Timer
... The bq2400x measures battery temperature using an external thermistor. For safety reasons, the bq2400x inhibits charge until the battery temperature is within the user-defined thresholds. Alternatively, the user can monitor the input voltage to qualify charge. The bq2400x series then charge the batt ...
... The bq2400x measures battery temperature using an external thermistor. For safety reasons, the bq2400x inhibits charge until the battery temperature is within the user-defined thresholds. Alternatively, the user can monitor the input voltage to qualify charge. The bq2400x series then charge the batt ...
Series and Parallel Circuits
... This is because the circuit’s electric energy source, the battery or generator, raises the potential an amount equal to the potential drop produced when the current passes through the resistors. ...
... This is because the circuit’s electric energy source, the battery or generator, raises the potential an amount equal to the potential drop produced when the current passes through the resistors. ...
Aalborg Universitet Wang, Huai; Liu, Wenchao; Chung, Henry
... energy storage device such as a capacitor. The gate signals for the switches S1-S4 in the FB are generated by a PWM modulator. It should be noted that the power stage could also be implemented by a half-bridge for loads with unidirectional current flow. The voltage ripple ΔvC on C is sampled by a sc ...
... energy storage device such as a capacitor. The gate signals for the switches S1-S4 in the FB are generated by a PWM modulator. It should be noted that the power stage could also be implemented by a half-bridge for loads with unidirectional current flow. The voltage ripple ΔvC on C is sampled by a sc ...
MAX5082/MAX5083 1.5A, 40V, MAXPower Step-Down DC-DC Converters General Description
... switch. The input voltage range is 4.5V to 40V for the MAX5082 and 7.5V to 40V for the MAX5083. The output is adjustable from 1.23V to 32V and can deliver up to 1.5A of load current. Both devices utilize a voltage-mode control scheme for good noise immunity in the high-voltage switching environment ...
... switch. The input voltage range is 4.5V to 40V for the MAX5082 and 7.5V to 40V for the MAX5083. The output is adjustable from 1.23V to 32V and can deliver up to 1.5A of load current. Both devices utilize a voltage-mode control scheme for good noise immunity in the high-voltage switching environment ...
The ABC`s of Fire Alarm Systems - Section I
... switch. A trouble condition will light one or more yellow LEDs on the panel and cause an audible signal, (usually a piezoelectric device) to sound. The audible signal can be silenced by operating the ‘Trouble Silence’ switch on the panel. Since the panel is locked, the trouble sounder can only be si ...
... switch. A trouble condition will light one or more yellow LEDs on the panel and cause an audible signal, (usually a piezoelectric device) to sound. The audible signal can be silenced by operating the ‘Trouble Silence’ switch on the panel. Since the panel is locked, the trouble sounder can only be si ...
memristors - 123seminarsonly.com
... solve for the energy dissipation during a single switching event. This power characteristic differs fundamentally from that of a metal oxide semiconductor transistor, which is a capacitor-based device. Unlike the transistor, the final state of the memristor in terms of charge does not depend on bias ...
... solve for the energy dissipation during a single switching event. This power characteristic differs fundamentally from that of a metal oxide semiconductor transistor, which is a capacitor-based device. Unlike the transistor, the final state of the memristor in terms of charge does not depend on bias ...
MC34262, MC33262 Power Factor Controllers
... The MC34262/MC33262 are active power factor controllers specifically designed for use as a preconverter in electronic ballast and in off−line power converter applications. These integrated circuits feature an internal startup timer for stand−alone applications, a one quadrant multiplier for near uni ...
... The MC34262/MC33262 are active power factor controllers specifically designed for use as a preconverter in electronic ballast and in off−line power converter applications. These integrated circuits feature an internal startup timer for stand−alone applications, a one quadrant multiplier for near uni ...
Multimeter
.JPG?width=300)
A multimeter or a multitester, also known as a VOM (Volt-Ohm meter or Volt-Ohm-milliammeter ), is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter would include basic features such as the ability to measure voltage, current, and resistance. Analog multimeters use a microammeter whose pointer moves over a scale calibrated for all the different measurements that can be made. Digital multimeters (DMM, DVOM) display the measured value in numerals, and may also display a bar of a length proportional to the quantity being measured. Digital multimeters are now far more common but analog multimeters are still preferable in some cases, for example when monitoring a rapidly varying value. A multimeter can be a hand-held device useful for basic fault finding and field service work, or a bench instrument which can measure to a very high degree of accuracy. They can be used to troubleshoot electrical problems in a wide array of industrial and household devices such as electronic equipment, motor controls, domestic appliances, power supplies, and wiring systems.Multimeters are available in a wide range of features and prices. Cheap multimeters can cost less than US$10, while laboratory-grade models with certified calibration can cost more than US$5,000.