Eight-channel LED drivers are compact, accurate and responsive

Intended for use with common anode LEDs, the TB62777FNG and TB62778FNG ICs can deliver up to 50mA per channel, adjustable via a single external resistor, and maximum output voltage of 25V. Output current is tightly toleranced, with a current accuracy of ±3% between channels and ±6% between different devices, ensuring consistent brightness.



Both the TB62777FNG and TB62778FNG feature power-on reset and thermal shutdown functionality, while the TB62778 includes supplementary gain control/ output open and output short detection. The devices operate with a supply voltage between 3.3V and 5.0V.



Internally the devices are based around eight channels of shift registers, latches, AND gates and the constant current outputs. Control data format is serial-in, parallel-out. The devices are fully BiCMOS-compatible and can accommodate 3.3V and 5.0V input signals. Drivers can be cascaded to support serial data transfer rates of 25MHz.



Both devices are supplied in 16-pin SSOP-P225-0.65B packages measuring 5.0mm x 4.4mm x 1.6mm and will operate at temperatures between -40ºC and 85ºC.