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What is Advanced Mobile Phone System (AMPS)?
Advanced Mobile Phone System (AMPS) is the most common type of First Generation analogue cellphone network developed by Bell Labs. It was suited for voice rather than data communications and operated in the 800MHz frequency band using frequency division multiple access (FDMA) technology. As of February 18, 2008, carriers in the United States were no longer required to support AMPS.
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2002-05-06 High voltage regulators and linear circuits using DN25
This application note shows how circuits utilizing depletion mode devices can benefit many design applications.
2000-12-08 Handling EMI in switch mode power supply design
This application note describes the nature and sources of EMI noise, and the design techniques used to reduce their shortcomings.
2005-03-17 Driver IC offers improved efficiency
ON Semi's N-Channel MOSFET driver promises to deliver improved efficiency when implemented in forward converters most commonly found in ATX and high-power SMPS.
2011-03-23 Diodes output rectifiers cool applications
Diodes Inc.'s SBR12U100P5, SBR12U120P5 and SBR15U30SP5 Super Barrier Rectifiers offer blocking voltage capabilities of 100V or 120V and suit slim laptop, netbook adapter, LCD and LED TV applications.
1999-12-01 Designing PCBs for embedded switching power supplies
Developing the schematic and debugging the breadboard in switching power supplies is a good start, but the critical challenge is to layout the PCB. Maximize your design by understand the power-supply operation, the circuit limitations, and performance requirements.
2006-10-02 Design tricks for digital amps
Kevin Belnap gives design tips on how to avoid common design problems with an SMPS and digital amplifier.
2009-11-26 Controller brings standby power down to
Fixed frequency operation at high output power with frequency reduction at low output power brings efficiency over the total load range.
2001-03-29 Compact, Low Cost, On-Board Power Supplies Uses No Heat Sink
This paper presents several switch-mode power supply (SMPS) solutions for step-down, step-up, step-up/down and positive-to-negative applications.
2001-07-02 Compact, Low Cost, On-Board Power Supplies Uses No Heat Sink
This paper presents several switch-mode power supply (SMPS) solutions for step-down, step-up, step-up/down and positive-to-negative applications.
2015-06-19 Building a burn-in chamber
Do you ever burn-in any of your projects? Do you use a commercial chamber or have you built your own? In this article, we share how we created our own for burning in power supplies.
2011-03-21 AVX capacitors tout BME technology
AVX Corp.'s new TurboCap capacitors offer a voltage range of 50V to 100V with capacitance value up to 220?F.
2002-04-16 Average simulations of flyback converters with SPICE3
This application note discusses how SPICE simulators are beneficial in investigating power supply systems.
2001-04-04 An overview of switched-mode power supplies
This application note discusses the operation, general parameters and circuit design of switched-mode power supplies (SMPS).
2009-07-07 An efficiency primer for switch-mode, DC-DC converter power supplies
This application note discusses the techniques for calculating and predicting efficiency losses in each component of an SMPS.
2003-07-16 Advanced power loss analysis using oscilloscope
The measurement of power loss at the switching device and inductor/transformer has becomes easier with modern oscilloscopes and power measurement software.
1999-04-08 Advanced and economical household inverter air-conditioner controller solution
This paper presents a detailed description of the indoor MCU control, the outdoor inverter compressor control, the main circuit of the inverter, the interface between IPM (Intelligent Power Module) and MCU, SMPS (Switching Mode Power Supply) and intelligent SPWM algorithm.
2014-11-17 75V MOSFETs boast ultra-low on-state resistance
Aimed at industrial applications, the StrongIRFET MOSFETs feature very high-current carrying capability, soft body diode and 3V typical threshold voltage to improve noise immunity.
2011-07-05 600V rectifiers offer low forward voltage drop
Vishay's 600V rectifiers combine fast and soft recovery time with low forward voltage drop and reverse recovery charge.
2000-12-06 300W, 100kHz converter utilizes economical bipolar planar power transistors
This application note describes the design and performance a 300W forward converter operating at 100kHz utilizing the MJW18010 planar bipolar power transistor, and demonstrates the overall performance achievable with these new transistors.
2000-12-12 130W ringing choke power supply using TDA4601
This application note describes a multiple-output SMPS that delivers a total output power of 130W.
2006-03-23 100V MOSFET reduces part count in SMPSs by 30%
Infineon's new family of 100V MOSFET devices promise to reduce part count in switched mode power supplies by 30 percent, and reduce losses of up to 20 percent.
2002-02-06 Wieland DIN switches claim edge
Wieland Electric's Wipos series of SMPS are said to give design engineers improved features and capabilities over traditional, non-DIN supplies in industrial settings.
2004-05-19 STMicro voltage reference offers controlled output
Designed for computer motherboards and STBs, instrumentation, battery chargers, switch-mode power supplies (SMPS) and battery-operated equipment, the TS3431 low-voltage shunt voltage reference of STMicroelectronics is claimed by the company to provide a precisely controlled output and can be used to replace Zener diodes.
2013-01-31 Rectifiers from IR promise to ease design, cut cost
The IR1169 SmartRectifier ICs are geared for flyback, forward and half-bridge converters used in AC-DC adapter, PC, server and telecom SMPS applications.
2008-07-07 Radiation-hardened MOSFETs simplify design
International Rectifier has expanded its portfolio of RAD-Hard Logic Level gate drive MOSFETs with the introduction of 60V, 100V and 250V MOSFETs for switch mode power supplies (SMPS), satellite power distribution systems and resonant power converters in high-reliability applications.
2005-03-11 ON Semi's latest PFC controllers
The two new PFC controllers from ON Semi are suitable for PFC in power supplies in televisions, flat-screen monitors, and PC desktop and notebook adapter SMPS.
2008-05-15 MOSFET devices come in robust TO-247 package
International Rectifier has expanded its portfolio of 60V, 75V and 100V MOSFETs for SMPS, UPS and industrial applications such as power tools, forklifts and other high power DC drives.
2000-06-15 Minimize power losses of lightly loaded flyback converters with the L5991 PWM controller
This application note deals with the L5991, a PWM controller that is particularly suitable for SMPS and is optimized for flyback topology to reduce power losses. It describes the operation of the device's "Standby function" in detail and states several relationships useful for the design.
2002-05-07 LR7 start-up circuit for efficient switch-mode power supplies
This application note explains how to use the Supertex LR7 as a start-up device for an SMPS, and demonstrates its advantages compared to conventional resistor and Zener diode circuits.
2008-06-30 Low-cost, green-mode PWM controller for flyback converters
The SG6860 controller is a highly integrated PWM controller that is designed to meet the low standby-power needs of 1ow-power SMPS. The proprietary green-mode function provides off-time modulation to linearly decrease switching frequency under light-load conditions.
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