Constant current LED driver for large screen LED display

Santa Clara, Calif. — Catalyst Semiconductor, Inc., a provider of analog, mixed-signal devices and non-volatile memory, has expanded its LED Driver lineup to introduce new products for the large-screen LED panel market. The new CAT4016 is a 16-channel, constant current source LED driver designed for billboards, advertising subtitles, meters or other large-size, general-purpose indoor and outdoor LED displays.

The CAT4016's LED channel maintains a steady current state at output voltages as low as 0.4V (when the LED current is 2mA to 100mA), which allows for higher power efficiency in application designs. The LED current can be set by an external resistor. A high-speed, four-wire serial interface with up to 25MHz frequency controls each LED channel through a shift register and latch architecture. A separate serial data output pin allows multiple devices to be used in series via the same serial interface. The CAT4016 also features thermal protection that allows the device to turn off the LED output when the die temperature exceeds the allowable limit.

As a replacement for similar products from Macroblock, Toshiba or other vendors, the CAT4016 offers a wider variety of packages to choose from, including 24-pin SOIC, TSSOP, QSOP and TQFN packages measuring only 4 x 4mm.

Features

16 channel constant current source

Serial interface up to 25MHz

Applicable LED current range is 2mA ~ 100mA

LED current is set by external resistor

The minimum differential pressure when the LED current is 30mA is 300mV

Overheat protection

Package: 24-pin SOIC, TSSOP, QSOP and TQFN (4 x 4mm)

Price and availability

When the order quantity is 10,000 pieces, the unit price of the CAT4016 is $0.54. Samples are available and the expected delivery time is 6-8 weeks after receiving the order.

About Catalyst Semiconductor

Headquartered in Santa Clara, Calif., Catalyst Semiconductor designs and markets analog and mixed-signal products and non-volatile memory. The product line includes digitally programmable potentiometers [DPP?], white and color LED drivers, and DC/DC conversion. , LDO regulator, power monitor, input and output expander, parallel interface EEPROM, Flash and NVRAM. Most Catalyst products have integrated configuration simulation technology to provide a new level of flexible design, low power consumption and small size. Catalyst's device products are commonly used in communications, networking systems, computers, automotive, industrial control, and consumer electronics. Typical applications include LCD displays, automotive instrumentation, optical networks, printers, modems, wireless networks, network cards, DIMM modules, cell phones, Navigation systems, digital satellite signal reception, set-top boxes, and network routers.
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