Toshiba Electronics has introduced a 16-channel LED driver that has a built-in PWM grey scale capability.

Intended for applications such as traffic signs, information boards and other high quality large panel displays requiring control multiple colour LEDs, the driver can deliver output voltages of up to 38V and provide constant currents of between 2mA and 80mA per channel using just a single resistor.

All of the functionality needed to deliver 256-step output brightness control is integrated into the device, while the on-board PWM capability provides 65536-step grey scale control per channel.

The TB62721 is supplied in a SSOP24 package and can operate with input voltages ranging from 3.3V to 5.0V.
 
For more information, see http://www.toshiba-components.com