Datasheet

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General Description

The MAX16815/MAX16828 current regulators operate

from a 6.5V to 40V input voltage range and deliver

up to 100mA (MAX16815) or 200mA (MAX16828) to

high-brightness LED (HB LED) loads. The output current

is adjusted by using an external current-sense resistor

in series with the LEDs. The MAX16815/MAX16828’s

dimming input allows wide-range “pulsed” PWM opera-

tion. An on-board pass element minimizes external com-

ponents while providing ±3.5% output-current accuracy.

The MAX16815/MAX16828 are available in a

thermally enhanced, 3mm x 3mm, 6-pin TDFN package

with exposed pad and in an 8-pin SO package with

exposed pad; they are specified over the automotive

-40°C to +125°C temperature range.

Applications

● Emergency Vehicle Warning Lights

● Signage and Indicators

● Ambient and Architectural Lighting

● LED Bulbs

● Display Backlighting

Features

● 6.5V to 40V Operating Range

● Adjustable LED Current

MAX16815: 35mA to 100mA

MAX16828: 35mA to 200mA

● ±3.5% LED Current Accuracy

● High-Voltage DIM Input for Dimming Interface

● Integrated Pass Element with Low-Dropout Voltage

(0.4V typ)

● 5V Regulated Output with 4mA Source Capability

● Thermal Shutdown

● Output Short-Circuit Protection

● Available in Small, Thermally Enhanced,

3mm x 3mm, 6-Pin TDFN and 8-Pin SO with

Exposed Pad Packages

● -40°C to +125°C Operating Temperature Range

19-4032; Rev 2; 4/14

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

PART TEMP RANGE PIN-PACKAGE

MAX16815ATT+ -40°C to +125°C 6 TDFN-EP*

MAX16815ASA+ -40°C to +125°C 8 SO-EP*

MAX16828ATT+ -40°C to +125°C 6 TDFN-EP*

MAX16828ASA+ -40°C to +125°C 8 SO-EP*

MAX16815

MAX16828

OUT

LEDs

SENSE

0.1µF

6.5V TO 40V

+5V REG

CS+

0.1µF

GND

DIM

PWM

DIMMING

CS-

MAX16815

MAX16828

OUT

LEDs

SENSE

+6.5V TO +40V

+5V REG

CS+

CS-

DIM

PWM DIMMING

GND

MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear

High-Brightness LED Drivers with PWM Dimming

Simplied Diagram

Typical Operating Circuit

Pin Configurations appear at end of data sheet.

Ordering Information

EVALUATION KIT AVAILABLE

Summary of content (11 pages)

PAGE 1
EVALUATION KIT AVAILABLE MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear High-Brightness LED Drivers with PWM Dimming General Description The MAX16815/MAX16828 current regulators operate from a 6.5V to 40V input voltage range and deliver up to 100mA (MAX16815) or 200mA (MAX16828) to high-brightness LED (HB LED) loads. The output current is adjusted by using an external current-sense resistor in series with the LEDs.
PAGE 2
MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear High-Brightness LED Drivers with PWM Dimming Absolute Maximum Ratings IN to GND...............................................................-0.3V to +45V CS+, CS-, V5 to GND..............................................-0.3V to +6V DIM, EN to GND..........................................-0.3V to (VIN + 0.3V) OUT Short Circuited to GND Duration (at VIN = +16V).......................................................
PAGE 3
MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear High-Brightness LED Drivers with PWM Dimming Electrical Characteristics (continued) (VIN = 12V, VEN = 12V (SO only), CV5 = 0.1µF to GND, IV5 = 0, VDIM = 4V, VCS- = 0V (SO only), connect RSENSE = 2Ω (MAX16815) and RSENSE = 1Ω (MAX16828) between CS+ and GND. TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear High-Brightness LED Drivers with PWM Dimming Typical Operating Characteristics (VIN = 12V, TA = +25°C, unless otherwise noted.) MAX16815 ILOAD = 100mA MAX16815 AND MAX16828 ILOAD = 35mA 50 -40 -25 -10 5 20 35 50 65 80 95 110 125 5V REGULATOR OUTPUT (V) 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 MAX16815 toc03 5 10 15 20 25 30 35 40 MAX16815 AND MAX16828 5.1 5.0 4.9 4.
PAGE 5
MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear High-Brightness LED Drivers with PWM Dimming Typical Operating Characteristics (continued) (VIN = 12V, TA = +25°C, unless otherwise noted.
PAGE 6
MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear High-Brightness LED Drivers with PWM Dimming Pin Description TDFN PIN SO NAME FUNCTION 1 6 DIM Pulsed Dimming Input. Drive DIM low to turn off output current (LED current). Drive DIM high to turn on the output current (LED current). DIM is pulled high to VIN when left unconnected — 7 EN Enable Input. Drive EN high to enable the output.
PAGE 7
MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear High-Brightness LED Drivers with PWM Dimming SO Functional Diagram DIM IN 0.8A EN V5 BANDGAP AND 5V REGULATOR 1.2V IREG P OUT THERMAL SHUTDOWN CS+ DIFF AMP GND MAX16815 MAX16828 CS- Detailed Description Applications Information +5V Regulator Programming the LED Current The MAX16815/MAX16828 include a fixed +5V output regulator that delivers up to 4mA of load current throughout the 6.5V to 40V input voltage range. Connect a 0.
PAGE 8
MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear High-Brightness LED Drivers with PWM Dimming D1 STOP D2 TAIL IN OUT R1 MAX16815 MAX16828 R2 D3 IN DIS OUT R3 C1 D4 ICM7555 TH TRG R4* V5 +5V REG LEDs C2 DIM CS+ GND RSENSE GND CS- C2 *R4 < 300k Figure 1. PWM Dimming Operation with ICM7555 Timer Two Brightness Levels for TAIL/STOP Lights Figure 1 shows PWM dimming operation for the MAX16815/MAX16828 with an ICM7555 timer.
PAGE 9
MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear High-Brightness LED Drivers with PWM Dimming STOP LEDs D1 OUT IN TAIL DIM MAX16815 MAX16828 C1 VIN V5 C2 LEDs IN R3 MAX16815 MAX16828 C1 CS+ PWM DIMMING R2 GND Q1 CS+ GND RSENSE Z1 CS- CS- Figure 3. Two-Level Brightness with Current Level Switch for TAIL/STOP Lights Figure 4.
PAGE 10
MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear High-Brightness LED Drivers with PWM Dimming Pin Configurations GND V5 CS+ TOP VIEW 6 5 4 MAX16815 MAX16828 8 OUT 2 7 EN CS- 3 6 DIM 5 GND MAX16815 MAX16828 EP* SO 2 3 OUT IN DIM 1 1 V5 4 EP* + IN CS+ TDFN *EP = EXPOSED PAD Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages.
PAGE 11
MAX16815/MAX16828 High-Voltage, 100mA/200mA Adjustable Linear High-Brightness LED Drivers with PWM Dimming Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 0 2/08 Initial release 1 7/09 Added the SO package to the Ordering Information table, Electrical Characteristics, TOC 2 and TOC 6, Pin Description table, and Functional Diagrams; modified the Simplified Diagram and Figures 1–4 to include the CS- pin; and added the SO-EP Pin Configuration 2 4/14 No /V OPNs; removed automotive refe