AL5815W5-7 Diodes Incorporated

AL5815/AL5816 60V LINEAR LED CONTROLLER Description Pin Assignments AL5815 Top View The AL5815 and AL5816 are 5-terminal adjustable constant current linear LED controllers offering excellent temperature stability and current capability. They can work with a wide input voltage range from ENB 1 5 VCC 4.5V to 60V. With its low 200mV current sense FB voltage, it controls the regulation of LED current with minimum power dissipation compared with traditional linear LED drivers. This makes it ideal for GND 2 medium to high current LEDs. The device has an internal output drive up to 15mA, which enables it to drive external Bipolar transistors or MOSFETs. It also provides the 3 4 FB OUT capability to drive longer LED chains with low drop out voltage and multiple LED channels. SOT25 AL5815 and AL5816 have their LED current adjusted and controlled by a sense resistor connected across FB pin and GND. The voltage AL5816Top View across this resistor is controlled to a precise 0.2V thus controlling the current. PWM 1 5 VCC The AL5815 has an enable (ENB) pin. Bringing ENB low to enable the device and turn on external transistor. Bringing ENB high puts the device into a low quiescent current shutdown state. The AL5815 has GND 2 a turn on delay built in which makes sure there is not a high current surge at startup. The average LED current can be adjusted by applying a low frequency PWM signal less than 200Hz to the ENB pin. FB 3 4 OUT If PWM dimming higher than 200Hz is required the AL5816 has replaced the enable pin with a PWM pin. This device can run at SOT25 frequencies greater than 200Hz. The AL5815 and AL5816 are available in SOT25 package. Applications Commercial and Industrial Lighting Features Exterior Lighting Appliance Lights Wide Input Voltage Range from 4.5V to 60V Low Reference Voltage (V = 0.2V) FB 4% Reference Voltage Tolerance Up to 15mA Driver Capability for Bipolar Transistor Low Standby Current for AL5815 PWM Dimming Frequency Higher than 200Hz for AL5816 Input Under Voltage Lock-out Over Temperature Shutdown Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See AL5815/AL5816 Typical Applications Circuit VIN VIN AL5815 AL5815 VCC OUT VCC OUT Q1 Q1 C1 C2 C1 C2 0.1F 10F ENB 0.1F 10F ENB OFF OFF ON ON FB GND GND FB R R S S GND GND V IN V IN AL5816 AL5816 VCC OUT VCC OUT Q1 Q1 C1 C2 C1 C2 0.1F 10F PWM 0.1F 10F PWM GND FB FB GND RS R S GND GND Pin Descriptions Pin Number Pin Name Function ENB (AL5815) Chip Enable, Active Low (Can be Used for Low Frequency Dimming) 1 PWM (AL5816) PWM Signal for High Frequency Dimming of the LED 2 GND Ground 3 FB Feedback Input, Regulates to 200mV Nominal 4 OUT Driving Output to External Transistors 5 VCC Input Supply Power Functional Block Diagram 2 of 12 AL5815/AL5816 July 2018 Diodes Incorporated www.diodes.com Document number: DS39991 Rev. 3 - 2 NEW PRODUCT