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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.
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
Applications
PART
TEMP RANGE
PIN PACKAGE
Industrial Lighting
Architectural and Decorative Lighting
Mood Lighting
Indoor and Outdoor LED Video Displays
Automotive Lighting
LCD Display Backlighting
MAX16824 AUE+ -40°C to +125°C 16 TSSOP-EP*
MAX16824AUE/V+ -40°C to +125°C 16 TSSOP-EP*
MAX16825 AUE+ -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
V IN
C IN
UP TO 36V
V IN
C IN
UP TO 36V
C REG
3
7
8
9
4
11
IN
PWM1
PWM2
PWM3
REG
GND
MAX16824
OUT1
OUT2
OUT3
CS1
CS2
CS3
1
16
12
2
15
13
R CS2
R CS1
MICROCONTROLLER
C REG
3
6
7
8
9
4
11
IN
CLK
DIN
LE
OE
REG
GND
MAX16825
OUT1
OUT2
OUT3
CS1
CS2
CS3
1
16
12
2
15
13
R CS2
R CS1
R CS3
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
R CS3
19-1107; Rev 3; 1/13
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MAX16826ATJ+C24 功能描述:LED照明驱动器 Prog 4-String HB RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N