The TEA1705 is a secondary side IC to be used in Switched Mode Power Supplies (SMPS) with high power density. The device offers excellent transient response in primary controlled systems of NXP® Semiconductors, with ultra‑low no‑load power and minimum sized output capacitors. The TEA1705 is intended to be used in power supplies and battery chargers with 5 V output. The TEA1705 operates in combination with the NXP Semiconductors primary‑side controller like the TEA1720xT. The output voltage is continuously monitored and when the output voltage is below the Vdet level, a transient interrupt signal is generated. This signal is transmitted via the transformer to the primary side to wake up the primary controller. This system reduces the volume of the output capacitors, minimizing the BOM cost. It also enables the building of compact chargers.