Datasheet Diodes AL5815 — Даташит

AL5815/AL5816
60V LINEAR LED CONTROLLER Description Pin Assignments
AL5815 пј€Top Viewпј‰ NEW PRODUCT 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
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
medium to high current LEDs. ENB 1 5 VCC GND 2 The device has an internal output drive up to 15mA, which enables it
to drive external Bipolar transistors or MOSFETs. It also provides the
capability to drive longer LED chains with low drop out voltage and
multiple LED channels. FB 3 4 OUT
SOT25 AL5815 and AL5816 have their LED current adjusted and controlled
by a sense resistor connected across FB pin and GND. The voltage
across this resistor is controlled to a precise 0.2V thus controlling the
current. AL5816пј€Top Viewпј‰ PWM 1 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
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. GND 2
FB 3 If PWM dimming higher than 200Hz is required the AL5816 has …