Integrated Driver Targets LED Panel Displays

Toshiba Electronics Europe (TEE) has launched the TC62D776, a high-accuracy integrated LED driver that incorporates 16-channel constant-current outputs for LED panel display applications. Suitable for LED panel displays requiring brightness consistency across multiple LEDs, the TC62D776 maintains constant currents of between 1.5mA and 90mA. High-accuracy control is achieved as a result of channel-to-channel and IC-to-IC output tolerances of +/- 1.5 per cent.

The IC operates from a supply voltage of between 3.0V and 5.5V and is rated for output voltages up to 17V. Current can be adjusted in 128 steps with a serial data transfer rate of up to 25MHz ensuring high-speed LED control. The device requires minimum external components, according to TEE. Current is controlled by a single external resistor while integrated functionality includes thermal shutdown, automatic error detection (output open and output short - OOD and OSD) and power-on-reset (PoR).

In addition, an output delay capability allows a short delay to be incorporated between channels, preventing the possibility of over-current conditions when all LEDs are switched on simultaneously. Incorporating CMOS-compatible I/O interfaces, the TC62D776 can accommodate input signal voltage levels of 3.3V and 5.0V. The IC is pin-compatible with other members of Toshiba's constant-current LED driver family and is available in options of 24-pin SSOP, HTSSOP24 and QSOP packages. The driver is designed for optimum efficiency and features a standby current consumption of 1uA.

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