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| High-Voltage, 350mA, Adjustable Linear High-Brightness LED (HB LED)
Driver | | | |
The MAX16800 current regulator operates from a 6.5V to 40V input voltage range and
delivers up to a total of 350mA to one or more strings of high-brightness LEDs. The output current of the MAX16800
is adjusted by using an external current-sense resistor in series with the LEDs. An enable input allows wide-range
“pulsed” dimming. Wave-shaping circuitry reduces EMI. The differential current-sense input increases noise immunity.
The MAX16800 is well suited for applications requiring high-voltage input and is able to withstand automotive
load-dump events up to 40V. An on-board pass element minimizes external components while providing ±3.5% output
current accuracy. Additional features include a 5V regulated output and short-circuit and thermal protection.
The MAX16800 is available in a thermally enhanced, 5mm x 5mm, 16-pin TQFN package and is specified
over the automotive -40°C to +125°C temperature range.
KEY FEATURES APPLICATIONS
#
+6.5V to +40V Operating Range
# Adjustable Level (35mA to 350mA)
# ±3.5% Output Current
Accuracy
# Integrated Pass Element with Low-Dropout Voltage (0.5V typ)
# Output Short-Circuit
Protection
# +5V Regulated Output with 4mA Source Capability
# Thermal Shutdown
#
Differential LED Current Sense
# High-Voltage Enable Pin for Dimming Interface
# Low Shutdown
Supply Current (12µA typ)
# Low 204mV Current-Sense Reference Reduces Power Losses
# Wave-Shaped
Soft Edges Reduce Radiated EMI During PWM Dimming
# Available in Small, Thermally Enhanced, 5mm x 5mm,
16-Pin TQFN Package
# -40°C to +125°C Operating Temperature Range
# Automotive Exterior:
Tail Lights and CHMSL
# Automotive Interior: Map, Courtesy, and Cluster Lighting
# General
Illumination
# Navigation and Marine Indicators
# Signage, Gasoline Canopies, Beacons
#
Warning Lights for Emergency Vehicles
NOTES AND COMMENTS
MAX16800 requires only small 2
ceramic capacitors at the Vin and +5V Regulator (0.1uF) to operate. It takes 85% less board space than other
solutions |
Martes, 30 Agosto, 2005 - 12:52 | |
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| High-Voltage, 350mA, Adjustable Linear High-Brightness LED (HB LED)
Driver | Entrar/Crear una cuenta | 0 Comentarios |
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| Alguien dijo ... |
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La dosis hace al veneno,
Paracelso (Theophrastus Phillippus Aureolus Bombastus von Hohenheim. 1493-1541).
Médico y químico, interesado en mineralogía y alquimia |
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