|
Get just enough boost voltage- 27-May-04 EDN Design Ideas: Adding a current-mirror circuit to a typical boost circuit allows you to select the amount of boost voltage and to ensure a constant difference between the input and the output voltages (Figure 1). This circuit is useful for high-side-drive applications, in which a simple voltage doubler is unacceptable because of the voltage range of the components involved or where the input voltage can vary Design by Kieran O'Malley, On Semiconductor, East Greenwich, RI
Get More Power with a Boosted Triode- 3-Apr-03 EDN Design Ideas: Even though 6L6 beam-power tubes have been around for 66 years, they are still quite popular for use in electric-guitar amplifiers, and its cousin, the 6CA7 (EL34) power pentode, is a favorite among audiophiles. The developers of these tubes designed them for pentode-mode operation, and they deliver maximum audio power in this mode. On the other hand, Design by Dave Cuthbert, Boise, ID
High Efficiency 2-Phase Boost Converter Minimizes Input & Output Current Ripple- DN371 Design Notes__ Linear Technology/Analog Devices
High-Power Boost/SEPIC/Inverting DC/DC Converters with Fault Protection- High-powered boost converters have historically suffered from the shortcoming that a DC path exists between the input and output nodes. Fault conditions, such as output shorts, could easily damage or destroy key components in this path. Other topologies, such as the SEPIC or inverting converters can also suffer from faults__ Linear Technology/Analog Devices App Note, Al Wu Nov 8th 2010
High-voltage Amplifier uses simplified- 14-Oct-04 EDN Design Ideas: Many scientific instruments and sensors need ac high-voltage drive. High-voltage drive is useful for driving electrodes in many applications. Design by Jui-I Tsai, Jun-Ming Shieh, Tai-Shan Liao, and Ching-Cheng Teng, National Chiao Tung University, Taiwan
Increasing Regulator Current- An outboard pass transistor used to increase the current output of a voltage regulator IC. __ Designed by Andy Collison
Li-Ion Powered Driver for 6 White LEDs & OLED Display- The LT3466-1 integrates a high voltage boost converter for OLED Bias (16V AT 30mA) with a high performance white LED driver__ Linear Technology/Analog Devices App Note, Mar 24th 2010
Li-Ion Powered Driver for 6 White LEDs & OLED with Output Disconnect- The addition of an external transistor adds output disconnect to the LT3466-1 boost converter__ Linear Technology/Analog Devices App Note, Mar 24th 2010
Li-Ion to 10 White LEDs & LCD Bias (+/-8V) with Output Disconnect- With two small external switched capacitor networks, the LT3466-1 can provide both positive and negative bias voltages (+/- 8VAT10mA) for an LCD display as well as driving 10 white LEDs__ Linear Technology/Analog Devices App Note, Mar 24th 2010
Li-Ion to 8 White LEDs & +/-15V TFT LCD Bias Supply- The LT3466-1 provides a small, integrated solution for TFT LCD Bias (+/-15VAT10mA) and backlighting (8 white LEDs) in a single package__ Linear Technology/Analog Devices App Note, Mar 24th 2010
Li-Ion to Six White LEDs & OLED/LCD Bias- The LT3498 can provide both the positive bias voltage required for OLED or CCD bias as well as drive multiple white LEDs for display backlighting__ Linear Technology/Analog Devices App Note, Mar 24th 2010
Li-Ion to Two White LEDs & OLED/LCD Bias- The LT3498 can provide both the positive bias voltage required for OLED or CCD bias as well as drive multiple white LEDs for display backlighting__ Linear Technology/Analog Devices App Note, Mar 24th 2010
Low-cost feedback boosts efficiency- 01/21/99 EDN Design Ideas: NOTE: Page includes several designs. Scroll to find this one. To implement a step-up converter with a current output, designers often simply connect the load in place of the top resistor in a resistive-divider feedback network. The bottom resistor then serves as a current-sense resistor. Though simple, this approach is inefficient. Low efficiency Design by John Guy, Maxim Integrated Products, Sunnyvale, CA
Low-cost switcher converts 5 to 24V- 02/16/98 EDN Design Ideas: (File contains several circuits, scroll to find this one) Design by Paul C Florian, Plano, TX
Low-noise step-up supply generates -5.5V output- 10/09/97 EDN Design Ideas: Some two- to three-cell applications require negative potentials higher than the battery voltage. The typical GaAsFET transmitter in a cellular phone, for example, requires a negative bias. Design by Larry Suppan, Maxim Integrated Products, Sunnyvale, CA
LT1070 Design Manual- AN19 Linear Technology This design manual is an extensive discussion of all standard switching configurations for the LT107) 0; including buck, boost, flyback, forward, inverting and "Cuk. " The manual includes comprehensive information on the LT107) 0, the external components used with it, and complete formulas for calculating component values. __ Linear Technology/Analog Devices
LT1074/LT1076 Design Manual- AN44 Linear Technology This note discusses the use of the LT107) 4 and LT107) 6 high efficiency switching regulators. These regulators are specifically designed for ease of use. This App Note is intended to eliminate the most common errors that customers make when using switching regulators__ Linear Technology/Analog Devices
LT1339 Design Manual- AN73 Linear Technology This App Note contains detailed design information to allow the reader to craft switching regulators using the LT1339 high power synchronous DC/DC converter. The note provides expanded pin descriptions for the LT1339 as well as easy-to-use graphical tools__ Linear Technology/Analog Devices
LT1370: a 500kHz 6a Monolithic Boost Converter- DN183 Design Notes__ Linear Technology/Analog Devices
LT1619: Tiny Boost Controller Provides Efficient Solutions for Low Voltage Inputs- DN255 Design Notes__ Linear Technology/Analog Devices
LT8705 80V VIN / VOUT Synchronous 4-Switch Buck-Boost DC/DC Controller-Video Product Brief- The LT®8705 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The part has integrated input current, input voltage, output current and output voltage feedback loops. With a wide 2.8V to 80V input and 1.3V to 80V output range, the__ Linear Technology/Analog Devices App Note, Bruce Haug-Senior Product Marketing Engineer Jun 11th 2013
LTC Design Note: 55V High efficiency buck-boost power manager & multi-chemistry battery charger- EDN Design Ideas: 01/01/2016 A versatile, efficient, multi-chemistry battery charger design operates in buck & boost modes. Design
LTC Design Note: 80V synchronous 4-switch buck-boost controller Delivers hundreds of watts with 99% efficiency- EDN Design Ideas: 12/26/2014 An 80V synchronous 4-switch buck-boost controller that can provide hundreds of watts at up to 99% efficiency with a single inductor. Four servo loops Design
LTC1871 No Rsense Controller is Small & Efficient in Boost Flyback & Sepic Applications- DN296 Design Notes__ Linear Technology/Analog Devices
Make your own LED Headlamp- I have submitted here my process for constructing an LED headlamp. I originally attempted to fit the battery holders for 3 AAA cells along with a tiny PC board for the three LEDs and current limiting resistor all in a tiny altoids tin. No go. I ended up buying a 3 cell holder with switch from Mouser electronics, gluing an elbow/ball joint pivot from a desktop pen set I had pieces from to that battery holder, then bolting the pivot to a Walgreens tiny mint tin (the sugar free ones come in a small oval shaped tin). The LEDs __ Designed by John Evans
One Transistor Provides Short-Circuit Protection- 10/16/03 EDN Design Ideas: In certain DC/DC-converter applications, on-chip, cycle-by-cycle current limit may be insufficient protection to prevent a failure during a short circuit. A nonsynchronous boost converter provide as a direct path from the input to th Design by Keith Szolusha, Linear Technology Corp, Milpitas, CA
Pass Transistor Lowers Dropout Voltage- 02/18/99 EDN Design Ideas: NOTE: File contains several circuits, please scroll to this this one. With linear regulators, you measure dropout voltage, VIN–VOUT, at the minimum input voltage for which the IC sustains regulation. Low dropout means longer battery life, because the load circuit continues to operate while the battery discharges to a lower terminal voltage Design by Matt Schindler, Maxim Integrated Products, Sunnyvale, CA
Photo Flash Charger Minimizes Parts Count- 10/22/98 EDN Design Ideas: Photo-flash and strobe devices operate by discharging a high-voltage capacitor into a bulb. Charging the capacitor from a battery or other low-voltage source requires a step-up DC/DC converter to boost the voltage, typically to 300V. One way to generate the high voltage Design by Steven Chenetz
Positive regulator makes dual negative-output converter- 06/26/03 EDN Design Ideas: Some systems, such as optical networks, require than one negative voltage. A common procedure is to boost the main negative supply of -5V to -10V and then reduce it with a linear regulator to -9V. The -5V itself comes from a positiv Design by Keith Szolusha, Linear Technology Corp, Milpitas, CA
Positive regulator makes negative DC/DC converter- 12/26/02 EDN Design Ideas: Power-supply designers can choose from a plethora of available positive buck regulators that can also serve as negative boost DC/DC converters. Some buck regulators have a negative-feedback reference voltage expressly for this purpose, but ICs that have positive-reference feedback voltages far outnumber these negative-feedback regulators Design by Keith Szolusha, Linear Technology Corp, Milpitas, CA
Protection Feature Enhances Boost Converter- 10/27/94 EDN Design Ideas: A boost-topology switching regulator is the simplest solution for converting a two to three-cell input to a 5V output. Unfortunately, boost regulators have several inherent disadvantages, including a lack of short-circuit protection and shutdown capability. In some battery-operated Design by Dimitry Goder, Linear Technology Corp, Milpitas, CA
Provide High-Side Current-Sensing for White-LED Drivers- 02/19/04 EDN Design Ideas: White LEDs find wide use in backlighting color-LCD screens in most portable devices, such as cellular phones, PDAs, and MP3 players. Multiple LEDs often connect in series to ensure that the same current flows through every LED. To Design by Dimitry Goder, Sipex Corp, San Jose, CA
PWM controller drives LEDs from high-voltage lines- 4-Mar-04 EDN Design Ideas: Powering LEDs from a wide dc range—say, 30 to 380V—without wasting a lot of power in the regulating block, is a difficult task when the LED current needs to be constant. Dedicated LED drivers are available, but they usually implement boost structures and are thus inadequate for high-voltage inputs Design by Christophe Basso, On Semiconductor, Toulouse, France
Relay: Transistor Boosted- This relay driver boosts the input impedance with a regular 2N3904 transistor (or equivalent). Very common driver. It can drive a variety of relays, including a reed-relay, and is non-latching.
Transistor Q1 is a simple common-emitter amplifier that increases the effective sensitivity of the 12 volt relay coil about a 100 times. __ Designed by Tony van Roon VA3AVR
|
