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SOT-23 Switching Regulator with Integrated 1A Switch Delivers High Current Outputs in a Small Footprint - DN232 Design Notes__ Linear Technology/Analog Devices Speed Regulator for Rotary Tool - microcontroller-based DC motor speed regulator brings control for delicate work. __ Designed by Andrew Morris' Gadget Freak-Case #226
Step-down (buck) regulator with LM2576 - (5V/3A fixed and 1.2-50V/3A variable output) __ hobbyteam @ hobby-hour.com
Step-Down Switching Regulators - AN35 Discusses the LT107) 4, an easily applied step-down regulator IC . Basic concepts and circuits are described along with more sophisticated applications. Six appended sections cover LT107) 4 circuitry detail, inductor and discrete component selection, current measuring techniques, efficiency considerations and other topics (appnote 2/06) __ Linear Technology/Analog Devices
Step-up (boost) regulator schematic with LM2577 - (5V to 12V/800mA) __ hobbyteam @ hobby-hour.com
Supply Savess From Lax Predecessor - 11/23/94 EDN Design Ideas: The lab supply in Fig 1 automatically sets its output voltage to zero whenever you switch it on. Thus, the lab supply can't fry your circuit if the previous user left the voltage turned up too high. The circuit supplies 1 to 25V dc because it uses an LM317 regulator. When you turn on the supply, the bridge develops Design by Tian Jin-gin, Taiyuan Semiconductor Factory, Taiyuan, Shanxi, China
Switchable 15 Watt Resistive Load for 120/240 VAC - Be sure the switch is rated for the voltage and current to which it will be exposed. A fuse on the input would be a nice improvement __ Designed by Dick Cappels
Switching regulator 2 - i introduce the switching regulator which used MC34063A of the MOTOROLA, inc. in this page. This regulator is housed in the DiP (Dual in line Packge) with 8 pins. The 1.5-A output current can be gotten without the heatsink in spite of this size. The input voltage can be used from 3 V to 40 V and can do the function of the Step Up (making the output voltage which is higher than the input voltage) , the Step Down (making the output voltage which is lower than the input voltage) and moreover inverting __ Designed by Seiichi Inoue
Switching regulator charges NiMH
batteries - 12/21/00 EDN Design Ideas: Many NiMH
(nickel-metal-hydride) fast chargers use linear regulators, such as the LM317, in a current-source configuration with a charge-monitor IC . This arrangement dissipates much heat and requires considerable heat sinking, ad Design by Jason Hansen and Jim Hill, On Semiconductor, Phoenix, AZ
Switching Regulator Collection - AN30 Switching regulators are of universal interest. has made a major effort to address this topic. A catalog of circuits has been compiled so that a design engineer can swiftly determine which converter type is best. This catalog serves as a visual index to be browsed through for a specific or general interest. __ Linear Technology/Analog Devices
Switching Regulator Controls CCFT - 02/16/95 EDN Design Ideas: You can control the current in a cold-cathode fluorescent tube (CCFT]and, hence, its brightness with a switching-regulator IC Design by Doug Vargha, Maxim Integrated Products Sunnyvale, CA
Switching regulator drives robot Motor - 05/13/99 EDN Design Ideas: The circuit in Figure 1 shows an example of how you can use an integrated switching regulator (iSR] to efficiently vary the speed of a permanent-magnet dc motor. in this application, the rotating head of a robot senses the presence of an oncoming object (perhaps a human]. if the robot senses an object, it slows the rotationPDF contains many circuits, scroll to find this one. Design by Donald Comiskey, Power Trends Inc, Warrenville, IL
Switching regulator efficiently controls white-LED current - 04/27/06 EDN Design Ideas: Circuit has 93% efficiency and beats 64% efficiency of series resistor approach Design by Clayton Grantham
Switching regulator forms constant-current source - 05/30/02 EDN Design Ideas: Many applications require current sources rather than voltage sources. When you need a high-current source, using a linear regulator is inadvisable, because of the high power dissipation in the series resistor. To solve the wasted-power problem, you can use a switch-mode regulator. The circuit of Figure 1 uses IC 1, an LM2576 adjustable regulator Design by Stefan Strozecki, Institute of Telecommunications, bydgoszcz, Poland
Switching Regulator Generates Both Positive & Negative Supply with a Single Inductor: Design Notes Linear Technology - DN47 Design Notes__ Linear Technology/Analog Devices
Switching Regulator Output goes BeLow VREF - 03/17/94 EDN Design Ideas: The feedback arrangement of typical switching regulators doesn't allow the regulated outputs to go lower than the reference voltage. if you try to lower the output by modifying the feedback network, the compensation components the manufacturer recommends may no longer stabilize the regulator's error amplifier Design by Michael Keagy, Maxim Integrated Products, Sunnyvale, CA
Switching regulator reduces Motor brake's power consumption - 01/04/07 EDN Design Ideas: inexpensive IC replaces relays and power resistsor Design by Alain Minoz, Elekta Instrument AB, Stockholm, Sweden
Switching regulator turns into light source - 07/17/97 EDN Design Ideas: Simple external feedback circuit transforms a switching regulator into a constant-intensity light source Design by Donald V Comiskey Jr, Power Trends Inc, Warrenville , IL
Switching Regulators for Poets - Linear Technology AN25 __ Designed by Jim Williams - Sep 2nd, 1987
Switching-regulator Design lowers noise to 100 µV - 12/04/97 EDN-Design ideas Expending unconscionable amounts of bypass capacitors, ferrite beads, shields, Mumetal, and aspirin to ameliorate noise-induced effects is no longer the only way to tackle switching-regulator noise. Using a low-noise IC , you can now design switching converters with only 100 mV of noise. Size, output-flexibility, and efficiency advantages have made switching regulators common in electronic apparatus. The emphasis on these attributes has resulted in circuitry requiring minimal board area and with 95% efficiency. Although these advantages are welcome, they necessitate compromising other parameters. Design by Design by Jim Williams, Linear Technology Corp
Switching-regulator generates fast pulses - 04/13/06 EDN Design Ideas: Switching-regulator-controller ICs can deliver gate-drive pulses with rise and fall times of less than 2 nsec, making them ideal candidates for laboratory pulse-generators Design by Mitchell Lee, Linear Technology Corp
Switching-regulator supply provides low-noise biasing for varactor diodes - 11/09/00 EDN Design Ideas: Low-voltage systems often need a locally generated high voltage. Even for an application as noise-sensitive as varactor-diode biasing, a carefully planned switching-regulator-based design and layout can provide the necessary bias voltage. Design by Jim Williams and J Phillips and G Vaughn, im Williams, EDN's most revered contributor-At 63 years of age, Williams passed away in June 2011 after a stroke.
Switch-mode supply draws 43-mW standby power - EDN Design Ideas: 06/10/1999 Switch-mode offline supplies offer better efficiency than linear supplies. However, the efficiency of a switchmode power supply (SMPS) seriously degrades with light loads, and commutation losses provoke power dissipation well above 1W even with no load. Design by Christophe Basso and François Lhermite, Motorola SPS, Toulouse, France
Synchronized Regulator Produces Coherent Noise - 03/17/94 EDN Design Ideas: By using a gated-oscillator architecture instead of a clocked-PWM one, gated-oscillator-type switching regulators permit high efficiency over extended ranges of output current. This architecture eliminates the housekeeping currents associated with the continuous operation of fixed-frequency designs. Gated-oscillator regulators simply self-clock at whatever frequency is necessary to maintain the output voltage. Typically, loop-oscillation frequency ranges from a few hertz to the kilohertz region, depending on the load. Design by Jim Williams, Sean Gold, and Steve Pietkiewicz, Linear Technology, Milpitas, CA |
