MAX77271 Multimode PA Step-Down Converter with Linear Bypass Mode General Description
... powering the power amplifier (PA) in multistandard handsets such as LTE, WCDMA, TD-SCDMA, GSM, and EDGE. The device integrates a high-efficiency PWM stepdown converter for medium- and low-power transmission with an 85mΩ (typ) low dropout (LDO) bypass regulator, in parallel with the step-down convert ...
... powering the power amplifier (PA) in multistandard handsets such as LTE, WCDMA, TD-SCDMA, GSM, and EDGE. The device integrates a high-efficiency PWM stepdown converter for medium- and low-power transmission with an 85mΩ (typ) low dropout (LDO) bypass regulator, in parallel with the step-down convert ...
SN754410 Quadruple Half-H Driver (Rev. C)
... pairs with drivers 1 and 2 enabled by 1,2EN and drivers 3 and 4 enabled by 3,4EN. When an enable input is high, the associated drivers are enabled and their outputs become active and in phase with their inputs. When the enable input is low, those drivers are disabled and their outputs are off and in ...
... pairs with drivers 1 and 2 enabled by 1,2EN and drivers 3 and 4 enabled by 3,4EN. When an enable input is high, the associated drivers are enabled and their outputs become active and in phase with their inputs. When the enable input is low, those drivers are disabled and their outputs are off and in ...
Digital devices based on lambda diodes
... coming from Es to 0V. In a similar way [3,4], it is possible to design the logical inverter, (see fig. 3.4). Here the both shoulders of the inverter is a lambda-transistors of a first type (fig. 3.1.). This lambda-transistors have a complementary conductivity of forming FETs. When input level voltag ...
... coming from Es to 0V. In a similar way [3,4], it is possible to design the logical inverter, (see fig. 3.4). Here the both shoulders of the inverter is a lambda-transistors of a first type (fig. 3.1.). This lambda-transistors have a complementary conductivity of forming FETs. When input level voltag ...
MAX1725/MAX1726 12V, Ultra-Low I , Low-Dropout Linear Regulators
... For fixed 1.8V, 2.5V, 3.3V, or 5V output voltages, use the MAX1726. The MAX1725 features an adjustable output voltage from 1.5V to 5V, using two external resistors connected as a voltage-divider to FB (Figure 1). The MAX1725 is optimized for operation with R2 = 1.2MΩ. The output voltage is set by th ...
... For fixed 1.8V, 2.5V, 3.3V, or 5V output voltages, use the MAX1726. The MAX1725 features an adjustable output voltage from 1.5V to 5V, using two external resistors connected as a voltage-divider to FB (Figure 1). The MAX1725 is optimized for operation with R2 = 1.2MΩ. The output voltage is set by th ...
Lecture 7: Power Outline Power and Energy
... – Eliminates all switching activity in the block – Requires determining if block will be used ...
... – Eliminates all switching activity in the block – Requires determining if block will be used ...
BU97931FV-LB
... This device is controlled by a 3-wire signal (CSB, SCL, and SD). First, Interface counter is initialized with CSB=“H". Setting CSB=”L” enables SD and SCL inputs. The protocol of 3-SPI transfer is as follows. Each command starts with Command or Data judgment bit (D/C) as MSB data, followed by data D6 ...
... This device is controlled by a 3-wire signal (CSB, SCL, and SD). First, Interface counter is initialized with CSB=“H". Setting CSB=”L” enables SD and SCL inputs. The protocol of 3-SPI transfer is as follows. Each command starts with Command or Data judgment bit (D/C) as MSB data, followed by data D6 ...
MAX6819/MAX6820 SOT23 Power-Supply Sequencers General Description Features
... require one power supply to rise to the proper operating voltage before another supply is applied. Improper sequencing can lead to chip latchup, incorrect device initiation, or long-term reliability degradation. If the various supply voltages are not locally generated (coming from a main system bus, ...
... require one power supply to rise to the proper operating voltage before another supply is applied. Improper sequencing can lead to chip latchup, incorrect device initiation, or long-term reliability degradation. If the various supply voltages are not locally generated (coming from a main system bus, ...
RF MEMS Charge Pump
... The charge pump is a high impedance device which is sensitive to leakage paths between leads that can be caused by flux residue. For this reason, the solder mask should be open only where solder will actually be applied when mounting the TT6820QFN. It is essential that no conductive flux residue be ...
... The charge pump is a high impedance device which is sensitive to leakage paths between leads that can be caused by flux residue. For this reason, the solder mask should be open only where solder will actually be applied when mounting the TT6820QFN. It is essential that no conductive flux residue be ...
Paladin Transducers 250 Series Class 0.5
... Example for 1k Potentiometer: R1 = 1k, R2 = 0, R3 = 1k Example for 5k Potentiometer using only 4k; R1 = 5k, R2 = 1k, R3 = 4k (Remember R1 = R2 + R3) 0/1mA, 0/5mA, 0/10mA, 0/20mA or 4-20mA, 0/1, 0/5, 0/10V D.C. A.C. 110, 120, 220, 240, 380, 415V, 63.5, 139, 208, 277, 440, 480V D.C. 12, 24, 48, 110, 1 ...
... Example for 1k Potentiometer: R1 = 1k, R2 = 0, R3 = 1k Example for 5k Potentiometer using only 4k; R1 = 5k, R2 = 1k, R3 = 4k (Remember R1 = R2 + R3) 0/1mA, 0/5mA, 0/10mA, 0/20mA or 4-20mA, 0/1, 0/5, 0/10V D.C. A.C. 110, 120, 220, 240, 380, 415V, 63.5, 139, 208, 277, 440, 480V D.C. 12, 24, 48, 110, 1 ...
FR015L3EZ Low-Side Reverse Bias / Reverse Polarity Protector
... and VD before VIN starts to rise from 0; and in both Figures 16 and 18, negative input current is seen after FR015L3EZ is fully turned on. These phenomena are a combined effect of parasitic inductance and all the capacitors in the input voltage control circuit enclosed in the broken line as shown in ...
... and VD before VIN starts to rise from 0; and in both Figures 16 and 18, negative input current is seen after FR015L3EZ is fully turned on. These phenomena are a combined effect of parasitic inductance and all the capacitors in the input voltage control circuit enclosed in the broken line as shown in ...
AN INTELLIGENT HOT-SWAP CONTROLLER FOR ATCA FRU
... conditions. When the power supply voltage is said to be in the normal operating range (More than V_Low threshold and Less than V_High threshold) this is indicated by an active V_48_OK supervisory signal. When the power supply voltage is less than V_Too_Low Threshold, the Series FET is turned off af ...
... conditions. When the power supply voltage is said to be in the normal operating range (More than V_Low threshold and Less than V_High threshold) this is indicated by an active V_48_OK supervisory signal. When the power supply voltage is less than V_Too_Low Threshold, the Series FET is turned off af ...
Terminations for Advanced CMOS Logic
... not affect power consumption. Therefore, parallel termination dissipates less AC power. Because of this lower AC power at high frequencies, parallel terminations may consume less power than no termination. Depending upon the load capacitance, signal duty cycle, and line impedance, this frequency can ...
... not affect power consumption. Therefore, parallel termination dissipates less AC power. Because of this lower AC power at high frequencies, parallel terminations may consume less power than no termination. Depending upon the load capacitance, signal duty cycle, and line impedance, this frequency can ...
Switch power
... recharge, and so the transistor's duty cycle increases pulling the inductor towards ground, and because of the increased duty cycle Vout decreases when we really want it to increase. This causes an instability, which is well known for boost converters, and not a problem with buck converters. One way ...
... recharge, and so the transistor's duty cycle increases pulling the inductor towards ground, and because of the increased duty cycle Vout decreases when we really want it to increase. This causes an instability, which is well known for boost converters, and not a problem with buck converters. One way ...
Electrical Control and Ladder Diagrams
... between the electrical contacts and the switch below the contacts. Consider the left-hand contact point a hinge; the switch rotates counterclockwise up when actuated. The NC symbols develop a gap when the switch lifts. The limit switch is drawn on both the electrical and fluid power diagrams, becaus ...
... between the electrical contacts and the switch below the contacts. Consider the left-hand contact point a hinge; the switch rotates counterclockwise up when actuated. The NC symbols develop a gap when the switch lifts. The limit switch is drawn on both the electrical and fluid power diagrams, becaus ...
Mini-SAM II Layout - Simon
... (4) This is the derived subwoofer channel line output of the Mini-SAM II. The typical output level is 10dB. It can be connected to an audio power amplifier. The unbalanced signal should be solder connected with the “+” to the signal wire and the “GND” to the shield. ...
... (4) This is the derived subwoofer channel line output of the Mini-SAM II. The typical output level is 10dB. It can be connected to an audio power amplifier. The unbalanced signal should be solder connected with the “+” to the signal wire and the “GND” to the shield. ...
Electronics For You | If It`s Electronics, It`s Here
... The corner frequency for flicker noise is device dependent; low-noise design demands devices with a low flicker corner. The flicker-noise corner makes bipolar processes the best choice for low-noise oscillator design. GaAs devices cannot compete because their noise corner is from two to three orders ...
... The corner frequency for flicker noise is device dependent; low-noise design demands devices with a low flicker corner. The flicker-noise corner makes bipolar processes the best choice for low-noise oscillator design. GaAs devices cannot compete because their noise corner is from two to three orders ...
J.M. Rivas, O. Leitermann, Y. Han, and D.J. Perreault, “A Very High Frequency dc-dc Converter Based on a Class Phi-2 Resonant Inverter,” IEEE Transactions on Power Electronics , Vol. 26, No. 10, pp. 2980-2992, Oct. 2011.
... model of the diode incorporates 6 nH of lead inductance (between lead and the back of the TO-220 package), and 0.15 Ω of equivalent series resistance. The forward characteristic of each diode is modeled as a constant forward drop (Vd,ON = 507 mV) in series with a resistor (RS = 89.7 mΩ). With the ap ...
... model of the diode incorporates 6 nH of lead inductance (between lead and the back of the TO-220 package), and 0.15 Ω of equivalent series resistance. The forward characteristic of each diode is modeled as a constant forward drop (Vd,ON = 507 mV) in series with a resistor (RS = 89.7 mΩ). With the ap ...
choke_in.pdf
... choke input supplies are largely overlooked in today's atmosphere of large-value, low-cost electrolytic caps... it's much cheaper/lighter to use the brute force approach of massive banks of caps as opposed to a magnetic component like a filter choke. the benefits are all due to the "flywheel" effect ...
... choke input supplies are largely overlooked in today's atmosphere of large-value, low-cost electrolytic caps... it's much cheaper/lighter to use the brute force approach of massive banks of caps as opposed to a magnetic component like a filter choke. the benefits are all due to the "flywheel" effect ...
Pulse-width modulation
Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.