Extend the Wide Output Voltage Capability of
... voltage. Initially, the value for R2 was chosen to be 25 kΩ, but this value resulted in R1 and R2 being close to 1 MΩ. Therefore, the R2 value was decreased and the R1 value was recalculated. A value near 18.2 kΩ for R2 also would have been acceptable. A zero frequency of 2 kHz then was chosen to de ...
... voltage. Initially, the value for R2 was chosen to be 25 kΩ, but this value resulted in R1 and R2 being close to 1 MΩ. Therefore, the R2 value was decreased and the R1 value was recalculated. A value near 18.2 kΩ for R2 also would have been acceptable. A zero frequency of 2 kHz then was chosen to de ...
DB_MS8886C
... The discharge time tSENS on input pins IN[1:2] attached to the sensing plate capacitance is compared to the discharge time tREF of an internal RC timing element. Both RC timing circuits are periodically charged to VDD[1:2] level via MOS switches and then discharged via a resistor to ground (GND). Th ...
... The discharge time tSENS on input pins IN[1:2] attached to the sensing plate capacitance is compared to the discharge time tREF of an internal RC timing element. Both RC timing circuits are periodically charged to VDD[1:2] level via MOS switches and then discharged via a resistor to ground (GND). Th ...
FSL206MR Green Mode Fairchild Power Switch (FPS™) Features
... soldering defect, the current through the opto-coupler transistor becomes almost zero (refer to Figure 17). Then VFB climbs up in a similar manner to the overload situation, forcing the preset maximum current to be supplied to the SMPS until the overload protection is activated. Because excess energ ...
... soldering defect, the current through the opto-coupler transistor becomes almost zero (refer to Figure 17). Then VFB climbs up in a similar manner to the overload situation, forcing the preset maximum current to be supplied to the SMPS until the overload protection is activated. Because excess energ ...
Chapter 5 - Vicphysics
... VI in = VI out. This means that if the voltage steps down by a factor of 20, then the current must step up the same amount. So the output current will be 20 times the input current. 10 × 20 = 200 Amp. Question 169 Since V = IR, if you use a step-down transformer, you have lowered V to 12 volts. ...
... VI in = VI out. This means that if the voltage steps down by a factor of 20, then the current must step up the same amount. So the output current will be 20 times the input current. 10 × 20 = 200 Amp. Question 169 Since V = IR, if you use a step-down transformer, you have lowered V to 12 volts. ...
Pulse Width Modulation
... in a discharged state. Thus, the Trigger (pin 2) will be LOW, driving the Output (pin 3) to go HIGH. Discharge (pin 7) goes HIGH and shorts to ground. The cycle begins. The HIGH Output will cause C1 capacitor to be charged through the R1 and D1 path. Upon C1 voltage reaching 2/3 of +V, the Threshold ...
... in a discharged state. Thus, the Trigger (pin 2) will be LOW, driving the Output (pin 3) to go HIGH. Discharge (pin 7) goes HIGH and shorts to ground. The cycle begins. The HIGH Output will cause C1 capacitor to be charged through the R1 and D1 path. Upon C1 voltage reaching 2/3 of +V, the Threshold ...
Unit-8Lecture 51 TESTING OF ISOLATORS AND CIRCUIT
... In this section, the testing of isolators and circuit breakers is covered, giving common characteristics for both. While these characteristics are directly relevant to the testing of circuit breakers, they are not much relevant as far as the testing of isolators are concerned since isolators are not ...
... In this section, the testing of isolators and circuit breakers is covered, giving common characteristics for both. While these characteristics are directly relevant to the testing of circuit breakers, they are not much relevant as far as the testing of isolators are concerned since isolators are not ...
MAX3380E/MAX3381E +2.35V to +5.5V, 1µA, 2Tx/2Rx RS-232 Transceivers General Description
... The MAX3380E/MAX3381E achieve a 1µA supply current with Maxim’s AutoShutdown Plus feature, which operates when FORCEOFF is high and FORCEON is low. When these devices do not sense a valid signal transition on any receiver and transmitter input for 30s, the on-board charge pumps are shut down, reduci ...
... The MAX3380E/MAX3381E achieve a 1µA supply current with Maxim’s AutoShutdown Plus feature, which operates when FORCEOFF is high and FORCEON is low. When these devices do not sense a valid signal transition on any receiver and transmitter input for 30s, the on-board charge pumps are shut down, reduci ...
Distribution voltage regulators
... problems with the voltage supplied to their loads. Progressive expansion, load growth and economic considerations eventually impose voltage conditions on these systems that are less than ideal. This can cause electric equipment to operate at reduced efficiency and overall power costs to rise. Increa ...
... problems with the voltage supplied to their loads. Progressive expansion, load growth and economic considerations eventually impose voltage conditions on these systems that are less than ideal. This can cause electric equipment to operate at reduced efficiency and overall power costs to rise. Increa ...
High-Efficiency Step-Down Low Power DC
... converter enters a power save mode (pulse frequency modulation) to keep the efficiency high. In the PWM mode operation, the part operates at a fixed frequency of 750 kHz. At the beginning of each clock cycle, the high side P-channel MOSFET is turned on. The current in the inductor ramps up and is se ...
... converter enters a power save mode (pulse frequency modulation) to keep the efficiency high. In the PWM mode operation, the part operates at a fixed frequency of 750 kHz. At the beginning of each clock cycle, the high side P-channel MOSFET is turned on. The current in the inductor ramps up and is se ...
NSD-2101
... Based on the motor type, an initial drive signal period must be written to the NSD-2101. The period is specified in units of 0.04 usec (based on the nominal internal VCO frequency of 25 MHz). In the case of an SQL-RV-1.8 motor, the period may be 148 (94h) to generate a drive frequency of ~168.9 kHz. ...
... Based on the motor type, an initial drive signal period must be written to the NSD-2101. The period is specified in units of 0.04 usec (based on the nominal internal VCO frequency of 25 MHz). In the case of an SQL-RV-1.8 motor, the period may be 148 (94h) to generate a drive frequency of ~168.9 kHz. ...
Lab 3: Capacitance and RC circuits
... One end of the capacitor is still grounded because it was grounded before and it's been kept electrically isolated since then. The other end is now at +1000 V (relative to ground). In the circuit diagram, the two places labeled with the ground symbol are at the same potential, so this in turn is act ...
... One end of the capacitor is still grounded because it was grounded before and it's been kept electrically isolated since then. The other end is now at +1000 V (relative to ground). In the circuit diagram, the two places labeled with the ground symbol are at the same potential, so this in turn is act ...
MPM3805 - Monolithic Power System
... The MPM3805 is a step-down module converter with built-in power MOSFETs and inductor. The module’s integrated inductor simplifies the power system design and provides easy, efficient use. The DC-DC module comes in a small surfacemount QFN-12 (2.5mmx3.0mmx0.9mm) package and achieves 0.6A continuous o ...
... The MPM3805 is a step-down module converter with built-in power MOSFETs and inductor. The module’s integrated inductor simplifies the power system design and provides easy, efficient use. The DC-DC module comes in a small surfacemount QFN-12 (2.5mmx3.0mmx0.9mm) package and achieves 0.6A continuous o ...
MP3900DK-LF-Z Datasheet
... inductor current, and therefore reduces the stress on the power MOSFET. However, the larger value inductor has a larger physical size, higher series resistance, and/or lower saturation current. A good rule of thumb is to allow the peak-to-peak ripple current to be approximately 30-50% of the maximum ...
... inductor current, and therefore reduces the stress on the power MOSFET. However, the larger value inductor has a larger physical size, higher series resistance, and/or lower saturation current. A good rule of thumb is to allow the peak-to-peak ripple current to be approximately 30-50% of the maximum ...
Conversion of a Marconi Blue Cap LNB into a 3cms 30
... video gain control. A picture should be seen on a receiver. The sound is set up as in the Gunnmod 2 instructions. Some method of monitoring output power is required. An attenuater and a diode detector are ideal. (See various microwave manuals). Alternatively a detector diode held very close to the o ...
... video gain control. A picture should be seen on a receiver. The sound is set up as in the Gunnmod 2 instructions. Some method of monitoring output power is required. An attenuater and a diode detector are ideal. (See various microwave manuals). Alternatively a detector diode held very close to the o ...
Spark-gap transmitter
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""