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SFL320
The SFL320 is a high-power-factor flyback PWM controller designed for LED lighting applications. This IC uses transition mode (TM) operation to achieve high efficiency and low EMI. The SFL320 will clear the external EA feedback network before the IC is powered on. The IC also features soft-start control to reduce stress on the MOSFET during power-up. A highly linear analog multiplier is integrated in the SFL320 to achieve low THD and high power factor. A zero-current detector (ZCD) ensures TM operation. A restart timer is suitable for stand-alone applications. The IC also features minimum off-time and maximum frequency clamping to limit power MOS Vds spikes during LED output short circuits. In the SFL320, proprietary "frequency adjustment" helps improve THD performance while ensuring noise-free audio operation. The device integrates VCC overvoltage protection (VCC OVP) for improved system reliability. The SFL320 integrates features and protections such as undervoltage lockout (UVLO), VCC overvoltage protection (OVP), soft-start control, cycle-by-cycle current limiting (OCP), GD clamping, VCC clamping, and leading-edge blanking (LEB). In the SFL320, VCC OVP is an auto-recovery mode protection. The SFL320 is available in SOP-8 and DIP-8 packages.
Category：
- Product Description
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- Commodity name: SFL320
- 封装: SOP8
- 品牌: Saiwei Technology
The SFL320 is a high-power-factor flyback PWM controller designed for LED lighting applications. This IC uses transition mode (TM) operation to achieve high efficiency and low EMI. The SFL320 will clear the external EA feedback network before the IC is powered on. The IC also features soft-start control to reduce stress on the MOSFET during power-up. A highly linear analog multiplier is integrated in the SFL320 to achieve low THD and high power factor. A zero-current detector (ZCD) ensures TM operation. A restart timer is suitable for stand-alone applications. The IC also features minimum off-time and maximum frequency clamping to limit power MOS Vds spikes during LED output short circuits. In the SFL320, proprietary "frequency adjustment" helps improve THD performance while ensuring noise-free audio operation. The device integrates VCC overvoltage protection (VCC OVP) for improved system reliability. The SFL320 integrates features and protections such as undervoltage lockout (UVLO), VCC overvoltage protection (OVP), soft-start control, cycle-by-cycle current limiting (OCP), GD clamping, VCC clamping, and leading-edge blanking (LEB). In the SFL320, VCC OVP is an auto-recovery mode protection. The SFL320 is available in SOP-8 and DIP-8 packages.
◆ Built-in soft start
◆ Extremely low inrush current
◆ Undervoltage lockout with 8V hysteresis
◆ VCC overvoltage protection (OVP)
◆ Clear external EA feedback network before power-up
◆ Transition mode (TM) operation
◆ High linearity analog multiplier
◆ Proprietary 'frequency shaping' for higher PF and lower THD
◆ 3.3µs minimum OFF time
◆ 270kHz maximum frequency clamp
◆ 1.5% internal voltage reference
◆ Restart timer for independent applications
◆ Cycle-by-cycle current limit
◆ Built-in leading edge blanking (LEB)
◆ Audio noise-free operation
◆ Wide VCC voltage range from 10V to 32V
◆ 800mA drive capability
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