MAX16819 Maxim Integrated Products, MAX16819 Datasheet

MAX16819

Manufacturer Part Number

MAX16819

Description

(MAX16819 / MAX16820) step-down constant-current high-brightness LED drivers

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX16819.pdf (10 pages)

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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 applica-

tions requiring a wide input voltage range. The high-side

current-sensing and an integrated current-setting circuit-

ry minimize the number of external components while

delivering an LED current with ±5% accuracy. A hys-

teretic 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 fre-

quency, thus allowing for small component size.

The MAX16819/MAX16820 operate over the -40°C to

+125°C automotive temperature range and are avail-

able in 3mm x 3mm x 0.8mm, 6-pin TDFN packages.

19-0706; Rev 0; 12/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

High-Side Current Sense and 5000:1 Dimming

Architectural, Industrial, and Ambient Lighting

Automotive RCL, DRL, and Fog Lights

MR16 and Other LED Bulbs

Indicators and Emergency Lighting

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________________________________________________________________ Maxim Integrated Products

2MHz High-Brightness LED Drivers with

General Description

MAX16819

MAX16820

Pin Configuration

TDFN

Applications

♦ High-Side Current Sense

♦ Dedicated Dimming Control Input

♦ 20kHz Maximum Dimming Efficiency

♦ 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

Note: All devices are specified over the -40°C to +125°C oper-

ating temperature range.

+ Denotes lead-free package.

* EP = Exposed paddle.

MAX16819ATT+T

MAX16820ATT+T

PART

Typical Operating Circuit

SENSE

CSN

DIM

6 TDFN–EP*

6 TDFN-EP*

PIN-PACKAGE

Ordering Information

MAX16819

MAX16820

GND

DRV

PKG CODE

T633-2

VCC

Features

MARK

+ATB

+ATC

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