Linear Technology released a 2.1MHz DC to DC (DC-DC) converter --LT3492, this element door Designed to operate such as tee Channel constant current LED driver. LT3492 can drive 30 300 mA LEDs with 96% efficiency.

Each channel in the three groups of channels of the component is operated by an independent True Color PWM signal, so that each channel can be independently dimmed at a high dimming rate of 3000:1. Its constant frequency and current mode architecture can ensure stable operation between a wide range of supply and output voltages; The frequency adjustment pin can also allow the user to set the frequency between 330kHz and 2.1MHz to optimize the efficiency and reduce the size of external components to a smaller size.

LT3492 thermal enhanced 4mm × 5mm QFN (or thermal enhanced TSSOP) package provides a very small solution for 50W LED applications. The LT3492 can sense the output current at the high voltage end of the LED for step-down, step-down, or step-up configuration. Through the external sensing resistance, the user can set the output current range of each channel. Each of the three independent drive channels has internal 600 mA, 60 V NPN switching switch At the same time, it has a built-in gate driver to achieve PMOS disconnection. Other functions include open circuit LED protection and overheat limit.

characteristic

• True Color PWMTM dimming provides a dimming ratio of up to 3000:1

• Built in grid driver for PMOS LED disconnection

• Three independent drive channels with 600mA, 60V internal switches

• It can work in step-down, step-up and step-down step-up modes

• CTRL pin can accurately set LED current detection threshold in the range of 10mV to 100mV

• Adjustable frequency: 330kHz to 2.1MHz

• Open circuit LED protection

• Wide input range:

The operating voltage range is 3V to 30V

Transient protection to 40V

• Surface mount components

• 28 pin (4mm x 5mm) QFN and TSSOP package

application

• RGB lighting

• Billboards and large displays

• Automotive and avionics lighting

• Constant current source