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MAX16835
High-Voltage, 350mA, Adjustable Linear High-Brightness LED Driver
350mA LED Driver Provides 3.5% Current Accuracy for Long LED Strings
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Status
Active: In Production.
Description
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.
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Data Sheet
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An evaluation kit is available: MAX16836EVKIT
Key Features
- +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
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Applications/Uses
- 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
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Key Specifications:
| High Brightness LED Drivers |
| Part Number |
Topology |
Device VIN
(V) |
Device VIN
(V) |
LED Channels |
ILED per Channel
(A) |
LED String Volt.
(V) |
Internal Pwr. MOSFETs |
PWM Dimming Freq.
(kHz) |
PWM Dimming Ratio |
EV Kit |
Budgetary Price |
| max |
min |
max |
max |
max |
max |
See Notes |
| MAX16835 |
Linear |
40 |
6.5 |
1 |
0.35 |
38.6 |
Yes |
1 |
200 |
No |
$1.12 @1k |
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See All High Brightness LED Drivers (29)
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Pricing 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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Diagram
Simplified Diagram
More Information
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Information Index
Document Ref.: 19-4028
Rev 1;
2008-06-05
This page last modified: 2008-06-05
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