Sunnyvale, Calif. Supertex Inc. has introduced the CL3xx family of three LED driver ICs the CL320, CL325, and CL330 each consisting of three channels of constant current output that are designed to drive three LED strings at currents of 20 mA, 25 mA, and 30 mA each, respectively. They are specifically designed for applications in low-cost LED backlighting LCD panels, indicator lamps, decorative lights as well as general lighting.
The only external component required by the CL3xx LED drivers is a single ceramic bypass capacitor, which makes PCB designs extremely simple, said Supertex. In addition, the same capacitor may be shared with several drivers. Separate Enable pins for each channel allow pulse width modulated (PWM) dimming, three-step linear dimming, or individual disconnection of any faulty LED string.
Over-temperature protection circuitry shuts down all channels when the die temperature reaches 135°C. Normal operation resumes when die temperature drops by 30°C. The parts feature a 90-V standoff voltage and a fixed drive current with a ±6% tolerance over a VOUT range of 4-15 V.
All products in the CL3xx family are available in 8-lead, power SOIC packages (CL320SG-G, CL325SG-G, CL330SG-G). The parts are green and RoHS compliant.
Pricing: $0.90 each for the CL320SG-G, $0.91 each for the CL325SG-G, and $0.92 each for the CL330SG-G, all in quantities of 1,000.
Availability: Samples are available from stock. Lead time for production quantities is four to six weeks ARO.
Product information: CL3xx family
Supertex, Inc., 1-408-222-8888, www.supertex.com