AL1698K

Description

The AL1698K is a high efficiency, high performance, high power factor, and high current precision boost, buck-boost, and flyback dimmable LED driver for triac dimmable LED lamp applications. The device provides an accurate output current over wide line and load regulation. It can achieve higher than 90% efficiency by using a boost topology to meet the latest lighting regulatory high efficiency requirements. The wide switching frequency operates at Boundary Conduction Mode (BCM) to ease EMI/EMC design and testing.

The AL1698K LED driver has a built-in high voltage JFET, which provides the system with fast start-up time and enables users an easy and stable VCC supply design. The LED driver integrates a 600V/2A high voltage MOSFET. It can cover both 120V_AC and 230V_AC triac dimmable applications with eliminating the external high voltage MOSFET, which will reduce the system BOM cost. The device has built-in thermal fold-back protection trigger point to automatically reduce output current. Other protection features enhance LED lighting system's safety and reliability.

The device's dimming curve is compliant with the NEMA SSL6 standard. It also applies to a wide range of dimmers, including leading edge and trailing edge dimmer, to achieve deep dimming down to 1%.

The AL1698K is available in the SO-7 package.

Feature(s)

• High Efficiency > 90% (Boost Topology)
• Tight Current Sense Tolerance: ± 3%
• Low Operation Current: 310µA
• Single Winding Inductor
• Wide Range of Dimmer Compatibility
• Integration of 600V/2A MOSFET
• Integration of HV JFET
• NEMA SSL6 Dimming Curve Compliant
• Internal Protections
  • Undervoltage Lockout (UVLO)
  • Leading-Edge Blanking (LEB)
  • Cycle-By-Cycle Overcurrent Protection (OCP)
  • Overvoltage Protection (OVP)
  • Output Short Protection (OSP)
  • Thermal Foldback Protection (TFP)
  • Overtemperature Protection (OTP)
• SO-7 Package
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative.

https://www.diodes.com/quality/product-definitions/

Application(s)

• Mains dimmable LED lamps
• Offline LED power supply drivers