DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 2
Technical content
©SiFirst Technology - 1 - Confidential SiFirst_DS_320_V1.2 SFL320
FEATURES
◆ Built-in Soft Start ◆ Very Low Startup Current ◆ Under Voltage Lockout with 7.7V Hysteresis ◆ VCC Over Voltage Protection (OVP) ◆ Clear External EA Feedback Network before Power On ◆ Transition Mode (TM) Operation ◆ Highly Linear Analog Multiplier ◆ Proprietary “Frequency Adjusting” for Higher PF and Low THD ◆ 3.3us Min. OFF Time ◆ 270KHz Max Frequency Clamp ◆ Trimmed 1.5% Internal Voltage Reference ◆ Restart Timer for Stand-alone Applications ◆ Cycle-by-Cycle Current Limiting ◆ Built-in Leading Edge Blanking (LEB) ◆ Audio Noise Free Operation ◆ 10V to 32V Wide Range of VCC Voltage ◆ 800mA Drive Capability
APPLICATIONS
◆ LED Lighting Application ◆ Single Stage High PF Flyback AC/DC SMPS GENERAL DESCRIPTION SFL320 is a high power factor flyback PWM controller special for LED lighting applications. The IC adopts transition mode (TM) operation for high efficiency and low EMI. SFL320 will Clear External EA Feedback Network before IC power on. The IC also has Soft Start control to soften the stress on the MOSFET during power on period. In SFL320, a highly linear analog multiplier is integrated to achieve low THD and high power factor. The zero current detector (ZCD) ensures TM operation. A restart timer is for stand alone applications. The IC also has the function of Min. OFF time and Max. Frequency Clamp to limits power MOS Vds spike when LED output is short. In SFL320, the proprietary “ Frequency Adjusting ” can help to improve THD performance, while ensures audio noise free operation. A VCC Over Voltage Protection (VCC OVP) is integrated to improve system reliability. SFL320 integrates functions and protections of Under Voltage Lockout (UVLO), VCC Over Voltage Protection (OVP), Soft Start Control, Cycle-by-cycle Current Limiting (OCP), GD Clamping, VCC Clamping, Leading Edge Blanking (LEB), etc. In SFL320, VCC OVP is auto-recovery mode protection. SFL320 is available in SOP-8 and DIP-8 packages. TYPICAL APPLICATION EMI Filter CS GATEZCDVCC GND MULT FB COMP SFL100 High Power Factor Flyback PWM Controller SiFirst Confidential
©SiFirst Technology - 2 - Confidential SiFirst_DS_320_V1.2 SFL320 Pin Configuration FB COMP 3MULT VCC GD GND DIP8/ SOP8 5CS ZCD
Ordering Information
Part Number Top Mark Package Tape & Reel SFL320SG SFL320SG SOP8 Green SFL320SGT SFL320SG SOP8 Green Yes SFL320DP SFL320DP DIP8 RoHS Marking Information YWW: Year&Week code YWW: Year&Week code SiFirst Confidential