LYTSwitch-6 LED drivers feature high efficiency and low standby power
Smart lighting applications are set to benefit from Power Integrations LYTSwitch-6 family of safety-isolated LED-driver ICs.
The new ICs deliver flicker-free output up to 65W, and feature up to 94% efficiency and as little as 15mW standby power, with configuration options for two-stage or single-stage PFC support.
Targeting smart residential and commercial fixtures and low-profile ceiling troffers, LYTSwitch-6 ICs also exhibit fast transient response, which allows for cross regulation performance of parallel LED strings without additional regulator hardware, and allows easy-implementation of a pulse-width-modulation (PWM) dimming interface.
LYTSwitch-6 ICs include both constant-voltage (CV) and constant-current (CC) operation, enabling lighting manufacturers to reduce the number of product variants, resulting in manufacturing and logistics savings, according to the company.
The new ICs are protected by an advanced thermal foldback system which prevents overheating while delivering as much light as thermally possible in any circumstance or installation.
LYTSwitch-6 ICs feature a built-in 650 V or 725 V MOSFET and secondary-side FluxLink control which eliminates the need for an optocoupler and provides highly accurate output with better than three per cent CV and CC over line, load and temperature.
Power conversion for the flyback stage is more than 94 per cent efficient, achieved by using synchronous rectification and quasi-resonant switching which enables high power output without a heatsink. For example, a 35W, 12V, 2.92A design with an additional PFC circuit has been demonstrated to be more than 89 per cent efficient.
Devices offer low standby power — less than 15mW in universal AC input conditions – even with line voltage sensing, which allows the IC to protect itself from mains voltage surges and swells.
“LYTSwitch-6 ICs are ideally suited to smart lighting applications with multiple outputs,” said Hubie Notohamiprodjo, director of product marketing for LED lighting at Power Integrations. “By eliminating heatsinks and optocouplers and reducing the size of the output capacitor by as much as 30%, component count and system size are also reduced.”