AL1697

Description

The AL1697 is a high performance, high power factor, high efficiency and high precision buck-boost LED driver for mains dimmable LED lamp applications. The AL1697 topology provides an accurate output current over wide line and load regulation. The wide switching frequency operates at boundary conduction mode (BCM) to ease EMI/EMC design, and testing to meet the latest regulatory standards.

The AL1697 with built in MOSFET solution reduces the bill of material (BOM) cost by eliminating the need of auxiliary winding and an external high voltage MOSFET. The AL1697 has extensive protection features to enhance system safety and reliability. The AL1697 starts reducing output current when the driver’s temperature is higher than the built-in thermal foldback protection trigger point.

Feature(s)

• Two Internal High-Voltage MOSFET Options:
  
  • R_DSON 4Ω and 1.8Ω for Super-Junction
• Tight Current Sense Tolerance : ± 3%
• Low Startup Current: 130μA
• Low Operation Current: 170μA (Switching Frequency at 4kHz)
• Single Winding Inductor
• Wide Range of Dimmer Compatibility
• NEMA SSL6 Dimming Curve Compliant
• Internal Protections
• Undervoltage Lockout (UVLO)
• Leading-Edge Blanking (LEB)
• Cycle-by-cycle Overcurrent Protection (OCP)
• Output Open/Short Protection (OVP/OSP)
• Thermal Foldback Protection (TFP)
• Overtemperature Protection (OTP)
• SO-7 Package

Application(s)

• Mains Dimmable LED Lamps
• Offline LED Power Supply Driver