Integrated Solution Optimized for Single-Stage LED Drivers

International Rectifier Corp (IR) today introduced the highly integrated IRS29831 LEDrivIR™ control IC optimized for single-stage flyback and buck-boost topologies used in LED drivers including LED bulb replacement, LED tube lighting and down lights. Employing accurate primary-side power regulation, the IRS29831 integrates an LED driver, control IC, and power MOSFET utilizing 700V technology, and features high-voltage start up to offer a simple cost-effective single-stage solution while maintaining a high power factor and low THD for improved efficiency.

“The IRS29831 provides an extremely competitive and efficient solution for both isolated and non-isolated Flyback LED drivers. The device offers single stage primary side regulation with a high power factor and low Total Harmonic Distortion (THD) along with open and short circuit protection,” said Peter Green, LED Group Manager, IR’s Energy Saving Products Business Unit.

IRS29831-based LED driver circuits also offer smooth, flicker-free dimming with triac based dimmers. The device can also operate over a wide input voltage range. Protection features include hiccup mode open-load/over-voltage protection, cycle-by-cycle primary over-current limiting, and output short circuit protection.

The IRS29831 also features critical-conduction mode operation with discontinuous and burst modes at light load as well as the ability to allow users to configure isolated designs without an opto-coupler. Available in an 8-pin DIP package, the IRS29831 has a fast startup, low quiescent current, ESD protection and noise immunity. Pricing for the IRS29831 begins at US $1.25 each in quantities of 10,000-units. Production quantities are available immediately. The devices are lead free and RoHS compliant.