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Buck Configuration High-Power LED Driver - Microchip Application Note Published
4-Jan-06 (app note added 6/06) |
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Buck/Boost-Based LED Drivers using the HV9910 - Supertex Semiconductors (app note
added 6/06) |
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Calculating Power Dissipation for Differential Line Drivers - National
Semiconductor Application Note (app note added 6/06) |
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Cascaded converter boosts LED drive capability - 08/16/07 EDN-Design Ideas: A
two-stage boost converter can drive a string of 20 to 30 LEDs.....(design idea added
09/07) |
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Cheap PWM IC Makes Synchronous Gate Driver - 02/04/99 EDN-Design Ideas: A system
with a µP, memory, and peripherals usually requires several power-supply voltages.
Designers typically use local switching regulators to produce desired voltage
rails. One of most common topologies, synchronous buck regulator, converts
a 5 or 12V bus.....(design idea added 6/06) |
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Chipiplexing efficiently drives multiple LEDs using few microController Ports -
11/27/08 EDN-Design Ideas: , "Chipiplexing" approach simultaneously drives two
LEDs.....(design idea added 08/09) |
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Circuit Adapts Differential Input to Drive Coax - 05/08/97 EDN-Design Ideas: -Uses
an HFA1100 or HFA1105 to convert a balanced input signal to a single-ended output
signal, uses positive feedback to characteristic-impedance matching while increasing
the available output swing, as compared with using a simple series termination
resistor.....(design idea added 3/03) |
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Circuit delivers dimming Control for White LED Driver - 10/28/04 EDN-Design Ideas:
The demand for power in color cell-phone handsets is constantly increasing. New
applications steadily emerge, making it imperative to reduce power consumption in the
design. Examination of usage data shows that more than 50% of the power consumed is in
providing backlighting for the color screen. People use the phones for playing games
and MP-3s and a multitude of other heavy-duty, multimedia f.....(design idea added
1/05) |
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Circuit Drives 9 Volt Solenoids from 3 Volt Battery - 08/17/95 EDN-Design Ideas:
(design idea added 6/06) |
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Circuit Drives Latching Relays - 02/01/96 EDN-Design Ideas: (design idea added
6/06) |
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Circuit Drives Mixed Types & Quantities of LEDs10/03/02 EDN-Design Ideas: Portable
systems often use LEDs of different colors and in varying quantities of each color.
Some examples are white for the display backlight, green for keypad illumination, and
red for power. Typically, the LEDs derive power from at least.... |
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Circuit efficiently drives inductive loads - 05/25/00 EDN-Design
Ideas:.....(design idea added 2/06) |
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Circuit for Driving MicroController Friendly PWM Generators - Microchip
Application Note Published 27-Jun-05 (app note added 6/06) |
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Circuit for measuring Motor speed uses low cost components - 11/08/07 EDN-Design
Ideas: A microcontroller-based circuit provides both an LCD readout and an analog
motor-speed output.....(design idea added12/07) |
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Circuit Forms Simple Low Cost 1 Kv Driver - 05/13/04 EDN-Design Ideas:
High-voltage drivers have recently received much attention, because they play an
important role in driving piezoelectric and electro-optical components, for example.
Figure 1 shows a simple, low-cost, 1-kV driver. The circuit uses offline,
current-mode-control techniques and a flyback switching-power-supply
design....…..(design idea added 1/05) |
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Circuit Makes Universal VCSEL Driver - 07/10/03 EDN-Design Ideas: are commercially
available infrared semiconductor lasers with λ≅850 nm. Short-cavity-length,
high-quality Bragg mirrors impart properties to VCSELs that differ from those that
earlier Fabrey-Perot lasers impart. The emission characteristics—optical power, Pλ,
versus diode current..... VCSELs (vertical-cavity surface-emitting
lasers) VCSELs (vertical-cavity surface-emitting lasers)are
commercially available infrared semiconductor lasers with λ≅850 nm.
Short-cavity-length, high-quality Bragg mirrors impart properties to VCSELs that
differ from those that earlier Fabrey-Perot lasers impart. The emission
characteristics—optical power, Pλ, versus diode current.....(design idea added 1/05) |
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Circuit provides effective LCD drive - 09/28/00 EDN-Design Ideas:.....(design idea
added 11/05) |
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Circuit tests VCOM Drivers - 11/11/04 EDN-Design Ideas: Flat-panel LCD monitors
offer excellent image quality and more compact form factor than CRTs—hence, their
steadily increasing popularity. Unfortunately, the complexity of their manufacturing
process makes LCD monitors considerably more expensive than CRTs. The amplifier that
drives VCOM, the voltage on the backplane of the LCD panel, must be able to drive
large capacitive loads, deliver h.....(design idea added 11/04) |
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Circuits drive Single Coil Latching Relays - 11/13/08 EDN-Design Ideas: Five
driver circuits operate single-coil latching relays.....(design idea added 08/09) |
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Code Provides Adjustable Differential Drive for Robots - 10/16/03 EDN-Design
Ideas: Intelligently modifying the motor-drive commands to a robot can give you
control finesse during competitions. Moving a joystick hard right, for example, might
have different effects, depending on the robot's speed and direction. Software running
on an inexpensive.....(design idea added 1/05) |
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Compact laser diode driver provides protection for precision instrument use -
04/03/08 EDN-Design Ideas: A compact, cathode-grounded laser-diode driver provides
protection against ESD damage, start-up spikes, overshoot, and possible fluctuation
due to external optical feedback.....(design idea added 09/08) |
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Complementary LED Drive - Microchip Application Note Published 6-Nov-98 (app
note added 6/06) |
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Composite VGA encoder/decoder eases display upgrade - 09/28/06 EDN-Design Ideas:
Upgrade an RGB video system without adding cables.....(design idea added 06/07) |
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Constant Current Constant Voltage Converter Drives White LEDs - 09/02/04 EDN-Design
Ideas: LEDs usually take their drive from a constant dc-current source to maintain
constant luminescence. Most dc/dc converters, however, deliver a constant voltage by
comparing a feedback voltage to an internal reference via an internal error
amplifier.....(design idea added 1/05) |
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Constant-Current DC/DC LED Driver in ThinSOT - Linear Technology LT1932 (app note
added 2/05) |
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Controller Provides Multiple Alarm Driver Formats - 01/15/98 EDN-Design Ideas:
DC/DC converters for use inside the telephone handset require operation from the
high-source-impedance phone line. Additionally, the CCITT specifications call for
maximum on-hook power consumption of 25 mA. The dc/dc converter in Figure 1 is
70%-efficient at an input power of 25 mA, providing 5V at 3.4 mA. Controlled, low-peak
switch current ensures that the 48V input line experiences no excessive voltage drops
during switching.....(design idea added 06/06/06) |
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Current mirror drives multiple LEDs from a low supply voltage - 12/05/08 EDN-Design
Ideas: , A pulsed current mirror comprising discrete transistors drives LEDs
from a low voltage, avoiding thermal runaway.....(design idea added 08/09) |
