The MAX16805/MAX16806 LED drivers eliminate the
need for microcontrollers or switch-mode converters for
automotive interior dome, map, and courtesy light
applications. An EEPROM-programmable LED current-sense
reference simplifies production by using one
sense resistor to set the LED current for all LED bins. A
dual-mode DIM pin and an on-board 200Hz ramp generator
allow for PWM dimming with an analog or PWM
control signal. The analog control signal at dimming
input DIM allows for the "theater dimming" effect to be
implemented. Fast turn-on/-off times ensure a wide-range
PWM operation, while waveshaping circuitry minimizes
EMI. EEPROM-programmable LED current foldback makes it possible to operate at a high input voltage, while saving the cost and space associated
with having a large heatsink. The MAX16806 works with
an external thermal sensor to maintain maximum LED
junction temperature by folding back the LED current.
The thermal foldback temperature knee and slope are
EEPROM programmable. The MAX16806 SW pin supplies
necessary wetting current to a momentary switch.
Key Features
Applications/Uses
EEPROM or I²C Dynamically Programmable:
LED Current Foldback for High Input Voltage
LED Current Reference
LED Current Thermal Foldback (MAX16806)
On-Board 200Hz Ramp Generator Eliminates the Need for µC PWM Signal
Flexible Analog or PWM Control for PWM or Theater Dimming
Wetting Current and Debounce for Momentary Switch (MAX16806)
5.5V to 40V Input with Up to 39V Output Capability
35mA to 350mA Adjustable LED Current
Waveshaping Minimizes EMI During Dimming
Output Short-Circuit and Overtemperature Protection
Notes: *This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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