make inductors

The PMIC generally includes a power sequence logic unit (PSLU). The PSLU is designed to manage the system power by controlling multiple functions: the power on or power off characteristics of the various supplies; the battery-charge sources; and internal voltage references (VREF ) required to generate a low-noise, temperature stable baseline for the low dropout (LDO) regulators and other regulating functions.

To put this subject in context, some basic background is instructive. Internet growth is forcing the technology to migrate from simple data services to triple play services. Triple play services include voice, data and video over a single transport infrastructure. This migration requires changes in physical medium that bring service to homes from current cable or satellite TV, to fiber to the premises (FTTP) or xDSL. Among triple play services, video service is particularly challenging because end users want to be able to see their TV program while surfing the web or making a phone call.

A practical example design with test data Figure 2 shows a dual implementation of Figure 1 providing 3.3V and 1.2V at 2A each based on the National LM3475 PFET controller and small Siliconix FETs. The LM3475 comes in a SOT23-5 package and the FETs in SOT23-6 packages.

ALD1148xx/ALD1149xx products are depletion mode EPAD MOSFETs, which are normally-on devices when the gate bias voltage is at 0.0V. The depletion mode threshold voltage is at a negative voltage at which the MOSFET device turns off. Negative threshold values such as –0.40V, -1.30V and –3.50V are offered. Without supply voltage and with Vgs = 0.0V these EPAD MOSFET devices are already turned on and exhibit a controlled on-resistance between the source and drain terminals.

837-026-523-202_Datasheet PDF

To put this subject in context, some basic background is instructive. Internet growth is forcing the technology to migrate from simple data services to triple play services. Triple play services include voice, data and video over a single transport infrastructure. This migration requires changes in physical medium that bring service to homes from current cable or satellite TV, to fiber to the premises (FTTP) or xDSL. Among triple play services, video service is particularly challenging because end users want to be able to see their TV program while surfing the web or making a phone call.

A practical example design with test data Figure 2 shows a dual implementation of Figure 1 providing 3.3V and 1.2V at 2A each based on the National LM3475 PFET controller and small Siliconix FETs. The LM3475 comes in a SOT23-5 package and the FETs in SOT23-6 packages.

ALD1148xx/ALD1149xx products are depletion mode EPAD MOSFETs, which are normally-on devices when the gate bias voltage is at 0.0V. The depletion mode threshold voltage is at a negative voltage at which the MOSFET device turns off. Negative threshold values such as –0.40V, -1.30V and –3.50V are offered. Without supply voltage and with Vgs = 0.0V these EPAD MOSFET devices are already turned on and exhibit a controlled on-resistance between the source and drain terminals.

Dataman

Cincon

Cortina Systems

BeagleBoard.org

Wolfspeed - a Cree company

Circuit Scribe/Electroninks Writeables Inc.

Comchip Technology

Mueller Electric Co.

Eaton

Lascar Electronics

Bulgin

BlueCreation

Tracy - templatemo

Marutsuelec

Knowles Johanson Manufacturing
Linda - templatemo

Precision Brand

Capital Advanced Technologies, Inc.
  • Therefore, a two-pronged strategy has been identified for future fabric development:

    DO Understand which DSP design flow methodology will work best for your designers, especially for those unfamiliar with FPGA design flows. One of the first questions to ask is, How does the algorithm group prefer to prototype the DSP system? Will the group develop in-house models written in the C language that are not based on any specific tool or environment?” If so, there is a great deal of flexibility when choosing a DSP design flow. The team can select a modular approach and create a hardware implementation for each block using a particular chosen method. This preference may determine the best starting point for the FPGA co-processor design.

    Modularity and Reuse

    Samsung Electro-Mechanics
  • DO Understand which DSP design flow methodology will work best for your designers, especially for those unfamiliar with FPGA design flows. One of the first questions to ask is, How does the algorithm group prefer to prototype the DSP system? Will the group develop in-house models written in the C language that are not based on any specific tool or environment?” If so, there is a great deal of flexibility when choosing a DSP design flow. The team can select a modular approach and create a hardware implementation for each block using a particular chosen method. This preference may determine the best starting point for the FPGA co-processor design.

    Modularity and Reuse

    Mid-Term Ethernet Enhancements The mid-term strategy is focused on developing enhanced features in a backwards compatible manner while delivering a modest increase in bandwidth. To do so, several companies have come together to drive enhancements to Ethernet into silicon devices.

    GEMS Sensors
  • Modularity and Reuse

    Mid-Term Ethernet Enhancements The mid-term strategy is focused on developing enhanced features in a backwards compatible manner while delivering a modest increase in bandwidth. To do so, several companies have come together to drive enhancements to Ethernet into silicon devices.

    Sliding-mode or single-loop sigma-delta (ΣΔ) control mixes the inductor current and output voltage information in a single loop, almost like a current-mode converter, giving stable, widely LC-compliant operation without using a frequency compensation circuit because the inherent current loop makes the inductor look like a current source and the LC complex-conjugate pole effectively disappears. However, for filter LC components potentially varying by orders of magnitude, the power path bandwidth is at its lowest point at the worst-case LC filter combination (i.e., highest L and highest C). As a result, the control path must be low bandwidth, deteriorating the circuit’s ability to respond quickly to transient loads [2].

    KNIPEX Tools