Diodes Incorporated AL1698 Dimmable LED Driver
Diodes Inc. AL1698 Dimmable LED Driver is a high performance, high power factor, high efficiency, and high current precision buck-boost and flyback dimmable LED driver for Triac dimmable LED lamp applications. The AL1698 topology provides an accurate output current over the 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 AL1698 LED driver has a built-in high-voltage JFET, which gives the system a fast start-up time and enables users to have an easy and stable VCC supply design. The AL1698 also integrates a 600V/2A high-voltage MOSFET. By eliminating the external high-voltage MOSFET and VCC startup resistors, it can cover 230VAC Triac dimmable applications, reducing the system BOM cost.
The AL1698 has a built-in thermal fold-back protection trigger point to automatically reduce output current. Other protection features enhance the LED lighting system's safety and reliability. The AL1698 dimming curve is compliant with the NEMA SSL6 standard. It applies to a wide range of dimmers, including leading-edge and trailing-edge dimmers, to achieve deep dimming down to 1%.
Features
- ±3% tight current sense tolerance
- 100µA typical low startup current
- 310µA low operation current
- Single winding inductor
- Wide range of dimmer compatibility
- Integration of 600V/2A MOSFET
- Integration of HV JFET
- NEMA SSL6 dimming curve compliant
- Internal protections
- Under Voltage Lockout (UVLO)
- Leading-Edge Blanking (LEB)
- Cycle-By-Cycle Over Current Protection (OCP)
- Output Open/Short Protection (OVP/OSP)
- Thermal Foldback Protection (TFP)
- Over-Temperature Protection (OTP)
Applications
- Mains dimmable LED lamps
- Offline LED power supply
Functional Block Diagram
Associated Product
Diodes Incorporated Offline LED Drivers
Offers accurate, constant output current to provide high level of light quality & avoid flickering.