◆ The SF6562 is a transition mode (TM) power factor correction (PFC) controller for AC-DC switch-mode power supplies and lighting applications. ◆ The SF6562 integrates a high-linearity analog multiplier and THD optimizer, achieving ultra-low THD and near-unity power factor. A zero-current detector (ZCD) ensures TM operation. A restart timer is suitable for stand-alone applications. ◆ The SF6562 employs a proprietary "frequency adjustment" function to help improve THD performance while ensuring audio noise-free operation. The device integrates a VCC overvoltage protection (VCC OVP) function to enhance system reliability. The IC also features proprietary soft-start control to mitigate stress on the MOSFET during power-up. ◆ In the SF6562, the output overvoltage protection (OVP) and error amplifier (EA) thresholds are adjusted to a tight range and are internally temperature compensated. ◆ The SF6562 integrates functions and protections such as undervoltage lockout (UVLO), VCC overvoltage protection (OVP), soft-start control, cycle-by-cycle current limit (OCP), GD clamp, VCC clamp, leading edge blanking (LEB), system open-loop protection (OLP), and output OVP. ◆ In the SF6562, all protections are auto-recovery mode protections. ◆ The SF6562 is available in SOP-8 and DIP-8 packages.

◆ Transition Mode (TM) Operation

◆ VCC Overvoltage Protection (OVP)

◆ Soft Start Control

◆ Proprietary Soft Start Control

◆ Proprietary "Frequency Adjustment" for higher PF and lower THD

◆ High linearity analog multiplier with THD optimizer

◆ Low start-up and operating current

◆ 1.4% internal voltage reference

◆ High accuracy output overvoltage protection threshold with low temperature drift

◆ Undervoltage lockout with hysteresis

◆ Restart timer for independent applications

◆ Disable function

◆ Cycle-by-cycle current limit

◆ Built-in Leading Edge Blanking (LEB)

◆ Audio noise-free operation

◆ Wide VCC voltage range from 10V to 31V

◆ 800mA drive capability

◆ System open-loop protection

Applications

◆ Switching Power Supplies

◆ Lighting Applications