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MAX16816
Programmable Switch-Mode LED Driver with Analog-Controlled PWM Dimming
Programmable High-Power LED Driver Simplifies Design, Allows for Wide-Range Dimming Control, and Minimizes EMI
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Status
All versions are Not Recommended for New Designs. See Ordering Information for recommended replacements.
Description
The MAX16816 is a current-mode, high-brightness LED (HB LED) driver designed to control two external n-channel MOSFETs for single-string LED current regulation. The MAX16816 integrates all the building blocks necessary to implement fixed-frequency HB LED drivers with wide-range dimming control and EEPROM-programmable LED current binning with a factor of up to 1.6. This device is configurable to operate as a stepdown (buck), step-up (boost), or step-up/step-down (buck-boost) current regulator.
Current-mode control with adjustable leading-edge blanking simplifies control-loop design. Adjustable slope compensation stabilizes the current loop when operating at duty cycles above 50%. The MAX16816 operates over a wide input voltage range and is capable of withstanding automotive load-dump events. Multiple MAX16816 devices can be synchronized to each other or to an external clock. The MAX16816 includes a floating dimming driver for brightness control with an external n-channel MOSFET in series with the LED string.
HB LEDs using the MAX16816 can achieve efficiencies of over 90% in automotive applications. The MAX16816 also includes a 1.4A source and 2A sink gate driver for driving switching MOSFETs in high-power LED driver applications, such as front light assemblies. Dimming control allows for wide PWM dimming range at frequencies up to 5kHz. Higher dimming ratios (up to 1000:1) are achievable at lower dimming frequencies.
The MAX16816 provides user-programmable features through on-chip nonvolatile EEPROM registers. Adjustable features include a programmable soft-start, LED current (binning), external MOSFET gate driver supply voltage, slope compensation, leading-edge blanking time, and disabling/enabling of the RT oscillator.
The MAX16816 is available in a 32-pin TQFN package with exposed pad and operates over the -40°C to +125°C automotive temperature range.
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Data Sheet
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Key Features
- EEPROM-Programmable LED Current Binning
- Wide Input Range: 5.9V to 76V with Cold Start Operation to 5.4V
- Integrated Floating Differential LED Current-Sense Amplifier
- Floating Dimming Driver Capable of Driving an n-Channel MOSFET
- 5% or Better LED Current Accuracy
- Multiple Topologies: Buck, Boost, Buck-Boost, SEPIC
- Resistor-Programmable Switching Frequency (125kHz to 500kHz) and Synchronization Capability
- 200Hz On-Board Ramp Allows Analog-Controlled PWM Dimming and External PWM Dimming
- Output Overvoltage, Overcurrent, and LED Short Protection
- Enable/Shutdown Input with Shutdown Current Below 45µA
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Applications/Uses
- Automotive Exterior: Rear Combination Lights (RCL), Daytime Running Lights (DRL), Fog and Front Lighting, High-Beam/Low-Beam/Turn Lights
- General Illumination
- Navigation and Marine Indicators
- Neon Replacement, Emergency Lighting
- Signage and Beacons
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Diagram
Typical Operating Circuit
Product Guides
Reliability Reports
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Recommended Replacement |
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX16816ATJ+
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NRND |
MAX16833
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TQFN;32 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0014 (PDF)
Use pkgcode/variation: T3255M+4*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX16816ATJ+T
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NRND |
MAX16833
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QFN;
Land Pattern: Not Available
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-40°C to +125°C
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See data sheet
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Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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More Information
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Information Index
Document Ref.: 19-1054
Rev 0;
2008-01-24
This page last modified: 2009-08-26
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