Diodes Incorporated — Analog and discrete power solutions
SO 7

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AL16937 (NRND)

NRND = Not Recommended for New Design

BUCK Dimmable LED Driver

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Description

The AL16937 is a high performance, high power factor, high efficiency, and high current precision buck dimmable LED driver for triac dimmable LED lamp applications. The AL16937 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 AL16937 LED driver integrates 400V/3A MOSFET, which is suitable for 120Vac applications. The AL16937 has the 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 AL16937 dimming curve is compliant with the NEMA SSL6 standard. The AL16937 applies to a wide range of dimmers, including leading edge and trailing edge dimmer, to achieve deep dimming down to 1%.

The AL16937 is available in SO-7 package.

Feature(s)

  • Tight Current Sense Tolerance: ± 3%
  • Low Startup Current: 100µA Typical
  • Low Operation Current: 210µA (Switching Frequency at 4kHz)
  • Single Winding Inductor 
  • Wide Range of Dimmer Compatibility
  • Integration of 400V/3A MOSFET
  • NEMA SSL6 Dimming Curve Compliant 
  • Internal Protections
  • Under Voltage Lockout (UVLO)
  • Leading-Edge Blanking (LEB)
  • Cycle-By-Cycle Over Current Protection (OCP)
  • Output Short Protection (OSP)
  • Thermal Foldback Protection (TFP)
  • Over-Temperature Protection (OTP)
  • SO-7 Package

Application(s)

  • Mains Dimmable LED Lamps
  • Offline LED Power Supply Driver

Product Specifications

Product Parameters

Accuracy (%) 5
Dimming Triac
Efficiency (%) 85
Frequency (kHz) 200
LED Current (mA) N/A
Maximum DC VDD (VDC) 18
Maximum Input AC Voltage (VAC) 145
Minimum Input AC Voltage (VAC) 85
SupplyCurrent (mA) N/A
Temperature Range (°C) -40 to 150

Related Content

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Technical Documents

Calculators

Evaluation Boards and User Guides

Recommended Soldering Techniques

TN1.pdf

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2567 2022-03-30 2022-09-30 Device End of Life (EOL)