The MAX16835 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 (HB LEDs). The output current of the MAX16835 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 MAX16835 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 MAX16835 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/Uses
+6.5V to +40V Operating Range
Adjustable LED Current (35mA to 350mA)
±3.5% Output Current Accuracy
Integrated Pass Element with Low-Dropout Voltage (0.55V 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 (35µA typ)
Low 200mV Current-Sense Reference Reduces Power Losses
Wave-Shaped Edges Reduce Radiated EMI During PWM Dimming
Available in Small, Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN Package
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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