UCC28500 数据资料 dataSheet 下载
... SS2: (soft-start for PWM) SS2 is at ground for either enable low or OVP/ENBL below the UVLO2 threshold conditions. When enabled, SS2 charges an external capacitor with a current source. This voltage is used as the voltage error signal during start-up, enabling the PWM duty cycle to increase slowly. ...
... SS2: (soft-start for PWM) SS2 is at ground for either enable low or OVP/ENBL below the UVLO2 threshold conditions. When enabled, SS2 charges an external capacitor with a current source. This voltage is used as the voltage error signal during start-up, enabling the PWM duty cycle to increase slowly. ...
MAX1553/MAX1554 High-Efficiency, 40V Step-Up Converters for 2 to 10 White LEDs General Description
... greater than 10µH), stability, input, and output ripple are improved by connecting a capacitor in parallel with the LEDs (C4 in Figures 1, 2, and 3). To prevent saturation, use an inductor with a current rating that matches the device’s LX current limit. However, if size is particularly important, i ...
... greater than 10µH), stability, input, and output ripple are improved by connecting a capacitor in parallel with the LEDs (C4 in Figures 1, 2, and 3). To prevent saturation, use an inductor with a current rating that matches the device’s LX current limit. However, if size is particularly important, i ...
FPF2310/12/13/13L Dual-Output Adjustable Current Limit Switch FPF23 1
... The thermal shutdown protects the device from internally or externally generated excessive temperatures. Each switch has an individual thermal shutdown protection function and operates independently as adjacent switch temperature increases above 140°C. If one switch is in normal operation and shutdo ...
... The thermal shutdown protects the device from internally or externally generated excessive temperatures. Each switch has an individual thermal shutdown protection function and operates independently as adjacent switch temperature increases above 140°C. If one switch is in normal operation and shutdo ...
electronic power contoller
... Run / Stop input. A control voltage (24V DC) must be applied to terminals 32(+) and 31(-), to enable the unit, or a connec tion made between terminals 32 and 33 by using a switch. A permanent link between terminals 32 and 33 is used for operation without an external enable. The firing pulses are inh ...
... Run / Stop input. A control voltage (24V DC) must be applied to terminals 32(+) and 31(-), to enable the unit, or a connec tion made between terminals 32 and 33 by using a switch. A permanent link between terminals 32 and 33 is used for operation without an external enable. The firing pulses are inh ...
PTC thermistors for overcurrent protection and as inrush
... "Mounting instructions", "Sealing and potting" must be observed. When the thermistor is mounted, there must not be any foreign body between the electrode of the thermistor and the clamping contact. The minimum force and pressure of the clamping contacts pressing against the PTC must be 10 N and 50 k ...
... "Mounting instructions", "Sealing and potting" must be observed. When the thermistor is mounted, there must not be any foreign body between the electrode of the thermistor and the clamping contact. The minimum force and pressure of the clamping contacts pressing against the PTC must be 10 N and 50 k ...
Radiation-hard ASICs for optical data transmission in the ATLAS pixel...
... circuit was made compatible with the array. In Figure 5 we show the VCSEL current generated by the VDC from the various submissions as a function of the external control current Iset. The measurements are consistent with the expectations from the simulations. The current was measured with 10 W in se ...
... circuit was made compatible with the array. In Figure 5 we show the VCSEL current generated by the VDC from the various submissions as a function of the external control current Iset. The measurements are consistent with the expectations from the simulations. The current was measured with 10 W in se ...
Two Transistor Synapse with Spike Timing Dependent Plasticity
... incorporate STDP-like behavior. Furthermore, in order to accurately synthesize even the simplest neural architectures, STDP synapses must be realized in ultra-compact form with very high integration density. As a first step down that path, we have developed a two transistor synapse for implementing ...
... incorporate STDP-like behavior. Furthermore, in order to accurately synthesize even the simplest neural architectures, STDP synapses must be realized in ultra-compact form with very high integration density. As a first step down that path, we have developed a two transistor synapse for implementing ...
BSP75N 60V self-protected low-side Intellifet MOSFET switch Summary
... Drain-source clamp voltage Off-state drain current Off-state drain current Input threshold voltage (*) Input current Input current Input current ...
... Drain-source clamp voltage Off-state drain current Off-state drain current Input threshold voltage (*) Input current Input current Input current ...
A8503 Datasheet - Allegro Microsystems
... device may stay in soft start mode indefinitely, if the output voltage cannot rise to the LED regulation level and the MODE pin is tied high. To avoid this scenario, A8503 has a soft start timeout when the MODE pin is tied low. With the MODE pin low, if the device does not finish soft start during 1 ...
... device may stay in soft start mode indefinitely, if the output voltage cannot rise to the LED regulation level and the MODE pin is tied high. To avoid this scenario, A8503 has a soft start timeout when the MODE pin is tied low. With the MODE pin low, if the device does not finish soft start during 1 ...
Circulating Current Injection Methods Based on
... capacitor voltage balancing task [9]. Capacitor voltage balancing of an MMC does not have the limitations and complexities associated with other multilevel converters [16], [17]. However, it is mutually coupled with the circulating currents within each phase-leg of the MMC. Analysis of the circulati ...
... capacitor voltage balancing task [9]. Capacitor voltage balancing of an MMC does not have the limitations and complexities associated with other multilevel converters [16], [17]. However, it is mutually coupled with the circulating currents within each phase-leg of the MMC. Analysis of the circulati ...
Starting Performance of Synchronous Motors
... This method of calculation, where the torques in the two axes are calculated independent of each other, is only accurate enough when Yd and Yq are of about the same order of magnitude. In practical terms, this means that the damper winding must have complete endrings with connections between the pol ...
... This method of calculation, where the torques in the two axes are calculated independent of each other, is only accurate enough when Yd and Yq are of about the same order of magnitude. In practical terms, this means that the damper winding must have complete endrings with connections between the pol ...
AAT1235 数据资料DataSheet下载
... hysteresis threshold, which determines the inductor ripple current. Peak current is adjusted by the controller until the desired LED output current level is met. The magnitude of the feedback error signal determines the average input current. Therefore, the AAT1235 controller implements a programmed ...
... hysteresis threshold, which determines the inductor ripple current. Peak current is adjusted by the controller until the desired LED output current level is met. The magnitude of the feedback error signal determines the average input current. Therefore, the AAT1235 controller implements a programmed ...
TRIAC
TRIAC, from triode for alternating current, is a genericized tradename for an electronic component that can conduct current in either direction when it is triggered (turned on), and is formally called a bidirectional triode thyristor or bilateral triode thyristor.TRIACs are a subset of thyristors and are closely related to silicon controlled rectifiers (SCR). However, unlike SCRs, which are unidirectional devices (that is, they can conduct current only in one direction), TRIACs are bidirectional and so allow current in either direction. Another difference from SCRs is that TRIAC current can be enabled by either a positive or negative current applied to its gate electrode, whereas SCRs can be triggered only by positive current into the gate. To create a triggering current, a positive or negative voltage has to be applied to the gate with respect to the MT1 terminal (otherwise known as A1).Once triggered, the device continues to conduct until the current drops below a certain threshold called the holding current.The bidirectionality makes TRIACs very convenient switches for alternating-current (AC) circuits, also allowing them to control very large power flows with milliampere-scale gate currents. In addition, applying a trigger pulse at a controlled phase angle in an AC cycle allows control of the percentage of current that flows through the TRIAC to the load (phase control), which is commonly used, for example, in controlling the speed of low-power induction motors, in dimming lamps, and in controlling AC heating resistors.