Recently, Marktech Optoelectronics, Toshiba's optoelectronic partner in the U.S. expands its LED driver product family with two new high-performance devices from Toshiba - TB62777FNG and TB62778FNG. Their constant current LED drivers delivering a continuous current that can be regulated for superior illumination in the back-lighting of LCD panels, TV displays and notebook PCs, as well as light control for large RGB panel LED displays.
Both TB62777FNG and TB62778FNG are 8-channel, constant current LED drivers with serial-in/serial-out data transfer for dynamic displays. The LED drivers support a 3.3V to 5V supply voltage range and regulate the current source through one external resistor. The constant current output range is 5mA to 40mA; current settings for the TB62778FNG can be adjusted via a 7-bit serial data input. At an output voltage of 0.4V to 4V, the current accuracy between channels is +/-3% and between ICs, +/-6%. The LED drivers provide IC protection features including thermal shutdown. In addition, the TB62778FNG offers output open detection and output short detection. These modes enable the system designer to identify and capture hardware errors.
The TB62777FNG and TB62778FNG satisfy system requirements for high-speed data transmission. Data exchange for dynamic lighting of LED arrays is done at 25MHz over serial-in/serial-out connections of cascaded drivers. Both the TB62777FNG and TB62778FNG are fabricated using Toshiba's leading edge BiCMOS process. They are housed in a lead-free1 SSOP16 package with compact dimensions of 4.4mm (W) by 5.5mm (L).
The TB62777FNG’s samples are now available, and the price is $1.20 each in 1,000 unit quantities. The TB62778FNG is also sampling now, priced at $1.32 each in 1,000 unit quantities.
About Marktech Optoelectronics
Marktech Optoelectronics has been an industry leader in the application and design of LEDs for over 25 years. Toshiba America Electronic Components, Inc. has chosen Marktech to handle all North American technical sales and marketing for their Toshiba LEDs and Toshiba Constant Current LED Drivers. In addition to their Toshiba line Marktech also offers a wide range of standard Discrete, Surface Mount, and Dot Matrix Displays along with a complete line of Photo Sensors.
