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MAX16818
1.5MHz, 30A High-Efficiency LED Driver with Rapid LED Current Pulsing
First High-Efficiency, High-Power LED Driver that Enables Rapid Transient Response, Accurate LED Current Regulation, PWM and Analog Dimming
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Status
Active: In Production.
Description
The MAX16818 pulse-width modulation (PWM) LED driver controller provides high-output-current capability in a compact package with a minimum number of external components. The MAX16818 is suitable for use in synchronous and nonsynchronous step-down (buck) topologies, as well as in boost, buck-boost, SEPIC, and Cuk LED drivers. The MAX16818 is the first LED driver controller that enables Maxim's technology for fast LED current transients of up to 20A/µs and 30kHz dimming frequency.
This device utilizes average-current-mode control that enables optimal use of MOSFETs with optimal charge and on-resistance characteristics. This results in the minimized need for external heatsinking even when delivering up to 30A of LED current. True differential sensing enables accurate control of the LED current. A wide dimming range is easily implemented to accommodate an external PWM signal. An internal regulator enables operation over a wide input voltage range: 4.75V to 5.5V or 7V to 28V and above with a simple external biasing device. The wide switching frequency range, up to 1.5MHz, allows for the use of small inductors and capacitors.
The MAX16818 features a clock output with 180° phase delay to control a second out-of-phase LED driver to reduce input and output filter capacitors size or to minimize ripple currents. The MAX16818 offers programmable hiccup, overvoltage, and overtemperature protection. The MAX16818ETE+ is rated for the extended temperature range (-40°C to +85°C) and the MAX16818ATE+ is rated for the automotive temperature range (-40°C to +125°C). This LED driver controller is available in a lead-free, 0.8mm high, 5mm x 5mm 28-pin TQFN package with exposed paddle.
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Data Sheet
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An evaluation kit is available: MAX16818EVKIT
Key Features
- High-Current LED Driver Controller IC, Up to 30A Output Current
- Average Current Mode Control
- True-Differential Remote-Sense Input
- 4.75V to 5.5V or 7V to 28V Input Voltage Range
- Programmable Switching Frequency or External Synchronization from 125kHz to 1.5MHz
- Clock Output for 180° Out-of-Phase Operation
- Integrated 4A Gate Drivers
- Output Overvoltage and Hiccup Mode Overcurrent Protection
- Overtemperature Thermal Shutdown
- Thermally Enhanced 28-Pin thin QFN Package
- -40°C to +125°C Operating Temperature Range
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Applications/Uses
- Portable and Pocket Projectors
- LCD TVs and Display Backlight
- Front Projectors/Rear Projection TVs
- Automotive, Bus/Truck Exterior Lighting
- Automotive Emergency Lighting and Signage
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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 |
Freq.
(kHz) |
PWM Dimming Freq.
(kHz) |
PWM Dimming Ratio |
EV Kit |
Budgetary Price |
| max |
min |
max |
max |
max |
max |
max |
See Notes |
| MAX16818 |
| Boost/SEPIC | | Buck | | Buck-Boost |
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28 |
7 |
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30 |
100 |
No |
1500 |
30 |
1000 |
Yes |
$2.40 @1k |
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See All High Brightness LED Drivers (25)
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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
Product Guides
Reliability Reports
| Show FIT data for: |
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| Request Reliability Report for: |
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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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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX16818ATI+
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Active |
TQFN;28 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0023 (PDF)
Use pkgcode/variation: T2855+3*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX16818ATI+T
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Active |
TQFN;28 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0023 (PDF)
Use pkgcode/variation: T2855+3*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX16818ETI+
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Active |
TQFN;28 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0023 (PDF)
Use pkgcode/variation: T2855+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX16818ETI+T
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Active |
TQFN;28 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0023 (PDF)
Use pkgcode/variation: T2855+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
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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Information Index
Document Ref.: 19-0666
Rev 2;
2009-03-30
This page last modified: 2010-06-03
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