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MAX16819, MAX16820

2MHz High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming

High-Brightness Step-Down LED Driver Controllers with High-Side Current-Sensing and Rapid Current-Pulsing Capability
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Active: In Production.

Description

The MAX16819/MAX16820, step-down constant-current high-brightness LED (HB LED) drivers provide a cost-effective solution for automotive interior/exterior lighting, architectural and ambient lighting, LED bulbs such as MR16 and other LED illumination applications.

The MAX16819/MAX16820 operate from a 4.5V to 28V input voltage range and feature a 5V/10mA on-board regulator. A high-side current-sense resistor adjusts the output current and a dedicated PWM input (DIM) enables a wide range of pulsed dimming.

The MAX16819/MAX16820 are well suited for applications requiring a wide input voltage range. The high-side current-sensing and an integrated current-setting circuitry minimize the number of external components while delivering an LED current with ±5% accuracy. A hysteretic control algorithm ensures excellent input-supply rejection and fast response during load transients and PWM dimming. The MAX16819 features a 30% inductor current ripple and the MAX16820 features a 10% current ripple. These devices operate up to 2MHz switching frequency, thus allowing for small component size.

The MAX16819/MAX16820 operate over the -40°C to +125°C automotive temperature range and are available in 3mm x 3mm x 0.8mm, 6-pin TDFN packages.

Data Sheet

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An evaluation board is available: MAX16820EVKIT

Key Features

  • High-Side Current Sense
  • Dedicated Dimming Control Input
  • 20kHz Maximum Dimming Frequency
  • Hysteretic Control: No Compensation
  • Up to 2MHz Switching Frequency
  • ±5% LED Current Accuracy
  • Adjustable Constant LED Current
  • 4.5V to 28V Input Voltage Range
  • Over 25W Output Power
  • 5V, 10mA On-Board Regulator
  • -40°C to +125°C Operating Temperature Range
 

Applications/Uses

  • Architectural, Industrial, and Ambient Lighting
  • Automotive RCL, DRL, and Fog Lights
  • Heads-Up Display
  • Indicators and Emergency Lighting
   

Key Specifications:

LED Drivers
Part Number Regulation Topology Max. No. of LEDs LED Channels LED Configuration ILED per Channel
(A)
PWM Dimming Freq.
(kHz)
Dimming Ratio Dimming Control VDROPOUT
(mV)
VCURR_SENSE
(mV)
POUT
(W)
VIN
(V)
VIN
(V)
ICC
(mA)
LED String Volt.
(V)
Oper. Freq.
(kHz)
Budgetary
Price
max max max typ min max max max See Notes
MAX16819  Inductor Based 6 1 Series 3 20 5000 PWM 500 170 25 4.5 28 1.5 26 2000 $1.30 @1k
MAX16820  200 190
See All LED Drivers (80)

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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.



Diagram

MAX16819, MAX16820: Simplified Diagram
Simplified Diagram

More Information

Topmark Coding MAX16819
Topmark Coding MAX16820
New Product Press Release   2007-02-08 ]
Design Calculator for the MAX16819/MAX16820

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Information Index

Document Ref.: 19-0706 Rev 1; 2007-03-20
This page last modified: 2007-11-19