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Description

FULL DATA SHEET (PDF, 156kB) Download   E-Mail 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.

An evaluation kit is available:  MAX16836EVKIT  

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 -40°C to +125°C Operating Temperature Range		Automotive Interior: Map, Courtesy, and Cluster Lighting Automotive Exterior: Tail Lights and CHMSL Warning Lights for Emergency Vehicles Navigation and Marine Indicators General Illumination Signage, Gasoline Canopies, Beacons

Key Specifications:  High Brightness LED Drivers

Part Number

Topology

VIN (V)

VIN (V)

Extended VIN with External Bias

LED Channels

ILED per Channel (A)

LED String Volt.

Internal Pwr. MOSFETs

PWM Dimming Freq. (kHz)

PWM Dimming Ratio

EV Kit

Price

min

max

max

max

max

max

See Notes

MAX16835

Linear Current Regulator

6.5

40

No

1 1

0.35

Vin-1.4V

Yes

1

1:30

No

$0.75 @1k

See All High Brightness LED Drivers (26)

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Document Ref.: 19-4028; Rev 1; 2008-06-05
This page last modified: 2008-06-05