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Toshiba Electronics Europe has an LED driver that can maintain constant currents of between 1.5mA and 90mA.
The 16-channel TC62D722 driver has a built-in PWM grey scale capability. This means that 256-step output brightness control can be achieved with the addition of just a single resistor.
The on-board PWM capability offers 16-, 14-, 12- and 10-bit operation to deliver up to 65536-step grey scale control per channel.
Operating from a supply voltage of between 3.0V and 5.5V, the TC62D722 is rated for output voltages up to 17V.
Channel-to-channel current accuracy is specified as ±1.5%, as is IC-to-IC accuracy. As a result the brightness of large displays built around multiple LED chains and drivers can be maintained within tight tolerances.
The TC62D722 features CMOS-compatible I/O interfaces and is available in 24-pin SSOP, HTSSOP24 and QSOP packages.