Practical LED driver circuit. With the feasibility demonstrated, I designed the previous voltage multiplier LED driver. The output current may be scaled simply via adjusting the capacitor values. All ...

International Rectifier’s IRS29831 LEDrivIR integrates an LED driver controller and a 700-V MOSFET optimized for single-stage flyback and buck-boost topologies used in LED drivers, including LED bulb ...

Arraying LEDs and picking a driver IC. For this example design, 100 LEDs will be used and each dissipates 1W. An intermediate DC bus of 48V is a good choice because off-the-shelf AC-DC power supplies ...

LED driver outputs may also be damaged or destroyed by short circuits. Most LED drivers include built-in safety features, including thermal shutdown, as well as open and short LED detection. However, ...

Suppose we want to drive an LED string with 400 mA. Drivers U1 and U2 ... The second driver must have an identical circuit. Tie the driver outputs together to get the full LED current.

LED DRIVER CIRCUITS The design in Figure 3 represents a constant current chopper driver that provides a dc current with 10% ripple to an LED string used to edge light an LCD.

The typical low-voltage (24 V) lighting system uses a two-wire cable to connect the lamps to the off-line power supply, often located at some distance from the lamps. These systems can control ...