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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 448kB) Download   E-Mail

Description

The MAX16812 is a peak-current-mode LED driver with an integrated 0.2Ω power MOSFET designed to control the current in a single string of high-brightness LEDs (HB LEDs). The MAX16812 can be used in multiple converter topologies such as buck, boost, or buck-boost. The MAX16812 operates over a 5.5V to 76V wide supply voltage range. The MAX16812 features a low-frequency, wide-range brightness adjustment (100:1), analog and PWM dimming control input, as well as a resistor-programmable EMI suppression circuitry to control the rise and fall times of the internal switching MOSFET. A high-side LED current-sense amplifier and a dimming MOSFET driver are also included, simplifying the design and reducing the total component count. The MAX16812 uses peak-current-mode control, adjustable slope compensation that allows for additional design flexibility. The device has two current regulation loops. The first loop controls the internal switching MOSFET peak current, while the second current regulation loop controls the LED current. Switching frequency can be adjusted from 125kHz to 500kHz. Additional features include adjustable UVLO, soft-start, external enable/disable input, thermal shutdown, a 1.238V 1% accurate buffered reference, and an on-chip oscillator. An internal 5.2V linear regulator supplies up to 20mA to power external devices. The MAX16812 is available in a thermally enhanced 5mm x 5mm, 28-pin TQFN-EP package and is specified over the automotive -40°C to +125°C temperature range.

An evaluation kit is available:  MAX16812EVKIT  

Key Features		Applications/Uses
Integrated 76V, 0.2Ω (typ) Power MOSFET 5.5V to 76V Wide Input Range Adjustable LED Current with 5% Accuracy Floating Differential LED Current-Sense Amplifier Floating Dimming N-Channel MOSFET Driver PWM LED Dimming with: PWM Control Signal Analog Control Signal Chopped VIN Input Peak-Current-Mode Control 125kHz to 500kHz Adjustable Switching Frequency Adjustable UVLO and Soft-Start Output Overvoltage Protection 5µs LED Current Rise/Fall Times During Dimming Minimize EMI Overtemperature and Short-Circuit Protection		Automotive Lighting: DRL, Fog Lights Rear Combination Lights Front and Rear Signal Lights Interior Lighting Warning and Emergency Lighting Architectural and Industrial Lighting

Diagram

Simplified Diagram

Evaluation Kits

MAX16812EVKIT

Design Guides

Displays (PDF)

Reliability Reports

Reliability Report: MAX16812.pdf Show FIT data for: MAX16812

Software/Models

none

Ordering Information

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. More: SeeFull Data Sheet or Part 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.

Devices: 1-4 of 4

MAX16812	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX16812ATI/V+T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX16812ATI+			Active	TQFN;28 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0028 (PDF) Use pkgcode/variation: T2855+8*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16812ATI+T			Active	TQFN;28 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0028 (PDF) Use pkgcode/variation: T2855+8*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16812ATI/V+			Active	TQFN;28 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0028 (PDF) Use pkgcode/variation: T2855+8*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

Topmark Coding: MAX16812 New Product Press Release 2007-09-26

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