The REF_ICL8820_LED_43W_JT is a 43W reference design featuring Infineonâs flyback controller ICL8820. The board is a constant voltage (CV) secondary-side regulated (SSR) system and is intended to be used with a constant current (CC) converter for LED lighting applications.
Two-stage topologies are growing because of the convenient scalability of power on the primary side as well as of the features on the secondary side. REF_ICL8820_LED_43W_JT is designed as plug- and-play solution.
As a default setup, the reference design board is assembled with a start-up circuit based on a depletion-mode MOSFETÂ BSS126I on a very small adapter board. This setup offers the lowest standby losses. If low standby consumption is not necessary as an option, the start-up circuit can be changed to a resistive start-up.
This reference design is provided with two regulation circuits. Both circuits are designed as plug and play solutions, but at least one has to be connected to the main board.
The two boards shall show the trade-off between cost; here the TL431 board offers a low-cost solution, and standby performance, while the op-amp board shows an overall 30mW better performance.
With its benchmarking performance in power factor and total harmonic distortion at full-load as well as at low-load conditions ICL8820 enables window drivers and platform designs. Furthermore, the IC combines optimum efficiency and low EMI without compromising light quality.
Being the fully-featured variant of the ICL88xx family, ICL8820 is the perfect fit for on-off LED drivers, low dimming down to 0.1% including dim-to-off. Additionally equipped with an integrated burst mode and jitter function, the controller enables a very low stand-by power < 100mW. The built-in jitter function eases EMI certification without additional circuitry. Thus, ICL8820 is perfect for smart lighting and additionally eases the design of emergency lighting LED drivers at low cost and effort.
