Toshiba Develops AC/DC Offline LED Controller IC

Toshiba (TOKYO:6502) today announced the development of an AC/DC offline LED controller IC employing a single converter PFC*1 for LED lighting and lighting equipment. The samples are currently available and the company will move to commercialization in July.

The new product is an isolated flyback LED power controller that was developed to meet demanding design criteria: support for triac dimming; high PFC and fewer external parts by achieving active PFC with a single converter; and no use of opto-couplers and detectors for average LED current control of the second side of the transformer. The power factor value (PF) is more than 0.8-0.9 with standard 120-220V AC, and the accuracy of LED output current is +/-5%.

LED lighting, now replacing incandescent, offers low power consumption and a long operating life. Toshiba is developing products that feature control of higher power LED, that support dimming and higher PF, and that deliver more accurate output current with higher efficiency.

*1 Power Factor Correction: A function which is applied to improve the efficiency of electric power transmission system.

Main Features of New IC

• Support for triac dimming
• no use of opto-couplers and detector for average LED current control
• fewer external parts due to a PFC with a single converter
• bottom switch control of main MOSFET contributes to lower noise and lower power consumption
• LED output current accuracy less than +/-5% under 8-22V power supply.
• built-in detector of opening or shorting of the LED

Parts number - TC62D902FG
Sample Release - March of 2013
Sample Price - 100Yen
Mass Production - July of 2013

Main Specification of New Product

Wafer Technology - CD0.13-40V
Function - AC/DC offline LED power controller
Switching method - Isolated flyback
Supply voltage - Vac 85-264V
Output - Up to 20W, drive 3-8 LED in series, up to 1A.
Package - SOP-8

Source: http://www.toshiba.co.jp/