New version LED driver available from Soanar
LT3595 LED driver
The LT3595 from Linear Technology is a high performance LED driver designed to drive 16 independent channels of up to ten LEDs at currents of up to 50mA. Series connection of the LEDs provides identical LED currents, resulting in uniform brightness.
A single external resistor sets the LED current for all 16 channels and dimming is controlled for each channel by pulse width modulating the individual PWM pins.
Relative current matching among the 16 drivers is 8% and the PWM dimming range is 5000:1.
Using appropriate external components recommended by Linear Technology Corporation, the LT3595 can drive a 10-LED string down to 15mA LED current while operating in continuous conduction mode.
The LT3595 available from Soanar can accommodate input supply voltages between 4.5V and 45V and achieves a typical efficiency of 92%. It is supplied in a 5mm x 9mm x 0.75mm 56-pin QFN package.
Features:
- 16-channel buck mode LED driver
- 4.5V to 45V input supply range
- Up to 50mA LED current per channel
- 100mA, 45V internal switches
- 8% relative LED current match at 20mA
- 5000:1 true colour PWM dimming range
- LEDs disconnected in shutdown
- Internal Schottky diodes
- Low quiescent current
- 2MHz switching frequency
- Pin-selectable master LED current
- Typical efficiency 92%
- Open LED detection and thermal protection
- 56-pin 5mm x 9mm x 0.75mm QFN package
Applications:
- LED video billboards
- LCD televisions
- Stadium and advertising displays
4-Dec-2007