MAX16824_13 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – High-Voltage, Three-Channel Linear High-Brightness LED Drivers

EVALUATION KIT AVAILABLE
MAX16824/MAX16825
High-Voltage, Three-Channel Linear
High-Brightness LED Drivers
General Description
The MAX16824/MAX16825 three-channel LED drivers
operate over a 6.5V to 28V input voltage range. These
devices provide three open-drain constant-current-sink-
ing outputs that are rated to 36V and deliver up to
150mA of current to each string of high-brightness LEDs
(HB LEDs). The current at each output is programmable
by means of an external current-sense resistor. The
MAX16824 features three PWM inputs that control the
duty cycle of the output current, allowing a wide LED
dimming range to be implemented. The PWM inputs
also function as on/off control for each corresponding
output. The MAX16825 offers a 4-wire serial interface, a
3-bit shift register, and a 3-bit transparent latch. The ser-
ial interface allows a microcontroller to configure the out-
put channels using four inputs (DIN, CLK, LE, OE) and a
data output (DOUT). DOUT allows multiple drivers to be
cascaded and operated together.
The MAX16824/MAX16825’s on-board pass elements
minimize the need for external components, while at the
same time, providing ±5% LED current accuracy.
Additional features include a +5V (±5%) regulated output
with 4mA output current capability and thermal protection.
The MAX16824/MAX16825 are available in a thermally
enhanced 16-pin TSSOP-EP package and specified over
the -40°C to +125°C temperature range.
Applications
Industrial Lighting
Architectural and Decorative Lighting
Mood Lighting
Indoor and Outdoor LED Video Displays
Automotive Lighting
LCD Display Backlighting
VIN
CIN
UP TO 36V
3 _IN
OUT1 ¹
7
MAX16824
PWM1
8
OUT2 ¹⁶
PWM2
9
PWM3
4 _REG
CREG
11 _GND
12
OUT3
CS1 ²
CS2 ¹⁵
13
CS3
RCS3
RCS2
RCS1
Features
o 6.5V to 28V Operating Range
o Outputs Connected to 36V Supply for Long LED
Strings
o Three 36V-Rated Output Channels with
Independently Adjustable LED Current
o 150mA Output Current Per Channel
o ±5% LED Current Accuracy
o PWM Dimming
Three Independent Dimming Control Inputs
(MAX16824)
4-Wire Serial Interface LED Current Chopping
(MAX16825)
o +5V (±5%) Regulated Output with 4mA Source
Capability
o Fast Transient Dimming Response
o 200mV Current-Sense Reference Reduces Power
Loss
o Thermal Shutdown
o -40°C to +125°C Operating Temperature Range
o Thermally Enhanced, 16-Pin TSSOP Exposed Pad
Package
Ordering Information
PART
TEMP RANGE PIN PACKAGE
MAX16824AUE+ -40°C to +125°C 16 TSSOP-EP*
MAX16824AUE/V+ -40°C to +125°C 16 TSSOP-EP*
MAX16825AUE+ -40°C to +125°C 16 TSSOP-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
/V denotes an automotive qualified part.
Pin Configurations appear at end of data sheet.
Typical Operating Circuits
VIN
UP TO 36V
CIN
MICROCONTROLLER
CREG
3 _IN
6
CLK
7
DIN
8
LE
9
OE
4
REG
11
GND
OUT1 ¹
MAX16825
OUT2 ¹⁶
12
OUT3
2
CS1
15
CS2
13
CS3
RCS2
RCS1
RCS3
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-1107; Rev 3; 1/13