The CAT4016 is a 16 channel constant current driver for LED billboard and other general display applications. LED channel currents are programmed together via an external RSET resistor. Low output voltage operation on the LED channels as low as 0.4V (for 2 to 100mA LED current) allows for more power efficient designs. A high-speed 4-wire serial interface of up to 25MHz clock frequency controls each individual channel using a shift register and latch configuration. A serial output data pin (SOUT) allows multiple devices to be cascaded and programmed via one serial interface. The device also includes a blanking control pin (BLANK) that can be used to disable all channels independently of the interface. Thermal shutdown protection is incorporated in the device to disable the LED outputs if the die temperature exceeds a set limit.
The CAT4016 LED driver provides 16 constant‑current sink channels that can be programmed via a single external RSET resistor. It operates from a 3.0 V to 5.5 V supply and supports LED currents from 2 mA up to 100 mA per channel, with a low 0.4 V dropout voltage.
A high‑speed 4‑wire serial interface (up to 25 MHz) allows individual channel control and cascading of multiple devices. The device includes a BLANK pin for disabling all channels and thermal shutdown protection that activates at 160 °C. It is offered in RoHS‑compliant SOIC, TSSOP, QSOP and TQFN packages.
| Number of LED channels | 16 |
|---|---|
| LED current range | 2 mA to 100 mA |
| Maximum LED output current per channel | 150 mA |
| Serial interface clock frequency | up to 25 MHz |
| Thermal shutdown temperature | 160 °C |
| LED dropout voltage (minimum) | 0.4 V |
| Operating temperature range | -40 °C to +85 °C |
Each LED channel can handle up to 150 mA according to the absolute maximum ratings.
The serial interface can operate up to 25 MHz clock frequency.