MAX16824EVKIT+ Maxim Integrated Products, MAX16824EVKIT+ Datasheet

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MAX16824EVKIT+

Manufacturer Part Number
MAX16824EVKIT+
Description
KIT EVAL FOR MAX16824
Manufacturer
Maxim Integrated Products
Datasheets

Specifications of MAX16824EVKIT+

Current - Output / Channel
100mA
Outputs And Type
3, Non-Isolated
Voltage - Output
26.3V
Features
Dimmable
Voltage - Input
6.5 ~ 28V
Utilized Ic / Part
MAX16824
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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.
19-1107; Rev 2; 4/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
V
IN
C
IN
Industrial Lighting
Architectural and Decorative Lighting
Mood Lighting
Indoor and Outdoor LED Video Displays
Automotive Lighting
LCD Display Backlighting
C
REG
________________________________________________________________ Maxim Integrated Products
11
3
7
8
9
4
IN
REG
PWM1
PWM2
PWM3
GND
General Description
MAX16824
OUT2
OUT3
OUT1
CS2
CS1
CS3
High-Voltage, Three-Channel Linear
1
16
12
2
15
13
Applications
R
CS3
R
CS2
UP TO 36V
High-Brightness LED Drivers
R
CS1
♦ 6.5V to 28V Operating Range
♦ Outputs Connected to 36V Supply for Long LED
♦ Three 36V-Rated Output Channels with
♦ 150mA Output Current Per Channel
♦ ±5% LED Current Accuracy
♦ PWM Dimming
♦ +5V (±5%) Regulated Output with 4mA Source
♦ Fast Transient Dimming Response
♦ 200mV Current-Sense Reference Reduces Power
♦ Thermal Shutdown
♦ -40°C to +125°C Operating Temperature Range
♦ Thermally Enhanced, 16-Pin TSSOP Exposed Pad
+ 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.
MAX16824AUE+
MAX16824AUE/V+
MAX16825AUE+
C
V
IN
Strings
Independently Adjustable LED Current
Capability
Loss
Package
IN
MICROCONTROLLER
Three Independent Dimming Control Inputs
(MAX16824)
4-Wire Serial Interface LED Current Chopping
(MAX16825)
PART
C
REG
Typical Operating Circuits
11
3
6
7
8
9
4
IN
CLK
DIN
LE
OE
REG
GND
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
Ordering Information
MAX16825
OUT3
OUT1
OUT2
CS2
CS1
CS3
1
16
12
2
15
13
R
PIN PACKAGE
16 TSSOP-EP*
16 TSSOP-EP*
16 TSSOP-EP*
CS3
Features
UP TO 36V
R
CS2
R
CS1
1

Related parts for MAX16824EVKIT+

MAX16824EVKIT+ Summary of contents

Page 1

... CS2 C REG 13 11 GND CS3 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. High-Brightness LED Drivers ♦ 6.5V to 28V Operating Range ♦ Outputs Connected to 36V Supply for Long LED Strings ♦ ...

Page 2

High-Voltage, Three-Channel Linear High-Brightness LED Drivers ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +30V OUT1, OUT2, OUT3 to GND ..................................-0.3V to +40V CS1, CS2, CS3, REG to GND...................................-0.3V to +6V PWM1, PWM2, PWM3 to GND .................................-0.3V to +6V DIN, ...

Page 3

High-Voltage, Three-Channel Linear ELECTRICAL CHARACTERISTICS (continued 12V 1μF to GND REG REG values are +25°C.) (Note PARAMETER SYMBOL OUTPUTS (OUT1, OUT2, OUT3) Turn-On ...

Page 4

High-Voltage, Three-Channel Linear High-Brightness LED Drivers ELECTRICAL CHARACTERISTICS (continued 12V 1μF to GND REG REG values are +25°C.) (Note PARAMETER SYMBOL CLK Rising ...

Page 5

High-Voltage, Three-Channel Linear (V = 12V 1μF to GND REG REG T = +25°C.) A OUTPUT CURRENT vs. TEMPERATURE 200 180 I = 150mA 160 OUT_ 140 120 I = 95mA OUT_ 100 ...

Page 6

High-Voltage, Three-Channel Linear High-Brightness LED Drivers PIN NAME MAX16824 MAX16825 1 1 OUT1 2 2 CS1 REG N.C. 7 — PWM1 8 — PWM2 9 — PWM3 11 11 ...

Page 7

High-Voltage, Three-Channel Linear IN BANDGAP AND 5V REGULATOR REG PWM1 PWM CONTROL AND PWM2 LOGIC PWM3 Figure 1. Internal Block Diagram (MAX16824) Detailed Description The MAX16824/MAX16825 are three-channel LED dri- vers that operate from a 6.5V to 28V input voltage ...

Page 8

High-Voltage, Three-Channel Linear High-Brightness LED Drivers IN BANDGAP AND 5V REGULATOR REG DIN CLK SHIFT SHIFT DOUT REGISTER REGISTER LE LATCH LATCH OE LOGIC Figure 2. Internal Block Diagram (MAX16825) 8 _______________________________________________________________________________________ 200mV THERMAL SHUTDOWN SHIFT REGISTER LATCH GND OUT1 ...

Page 9

High-Voltage, Three-Channel Linear On-board pass elements minimize the need for external components while providing ±5% LED current accura- cy. Additional features include a +5V (±5%) regulated output with 4mA output current capability and thermal protection. The MAX16824/MAX16825 use a feedback ...

Page 10

High-Voltage, Three-Channel Linear High-Brightness LED Drivers LE CLK DIN DOUT OE OUT_ Figure 3. 4-Wire Serial-Interface Timing Diagram data. Holding OE low allows the output channels to fol- low the state of the output latches. The duty cycle depends on ...

Page 11

High-Voltage, Three-Channel Linear LE OUT_ LE OUT_ CLK OUT_ CLK OUT_ Figure 4. LE and CLK to OUT_ Timing ______________________________________________________________________________________ High-Brightness LED Drivers 50% t LRF 50% 50% t LRR 50% 50% t CRF 50% 50% t CRR 50% 11 ...

Page 12

High-Voltage, Three-Channel Linear High-Brightness LED Drivers A third method is to hold both LE and OE in the enabled state. This allows the data bits to directly con- trol the output channels, and hence, pulse dim the out- put current. ...

Page 13

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2009 Maxim Integrated Products ...

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