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MAX16824AUE+

P1-P3P4-P6P7-P9P10-P12P13-P13
MAX16824/MAX16825
High-Voltage, Three-Channel Linear
High-Brightness LED Drivers
EVALUATION KIT AVAILABLE
19-1107; Rev 3; 1/13
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
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
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
OUT1
OUT3
OUT2
CS1
CS2
CS3
IN
1
16
3
7
8
9
4
11
12
2
15
13
PWM1
PWM2
PWM3
REG
GND
C
REG
C
IN
V
IN
UP TO 36V
R
CS2
R
CS1
R
CS3
MAX16824
Typical Operating Circuits
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.
OUT1
OUT3
OUT2
CS1
CS2
CS3
IN
CLK
DIN
LE
REG
GND
C
REG
C
IN
V
IN
R
CS2
R
CS1
R
CS3
OE
MICROCONTROLLER
MAX16825
1
16
3
6
7
8
9
4
11
12
2
15
13
UP TO 36V
MAX16824/MAX16825
High-Voltage, Three-Channel Linear
High-Brightness LED Drivers
2
Maxim Integrated
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
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, CLK, LE, OE, DOUT to GND ............................-0.3V to +6V
Maximum Current into Any Pin
(except OUT1, OUT2, OUT3) ........................................±20mA
Maximum Current into OUT1, OUT2, OUT3......................160mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TSSOP-EP (derate 26.1mW/°C above +70°C).......2089mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
IN
= 12V, C
REG
= 1µF to GND, I
REG
= 0, R
CS_
= 2Ω from CS_ to GND, T
J
= T
A
= -40°C to +125°C, unless otherwise noted. Typical
values are at T
J
= T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range V
IN
6.5 28.0 V
GND Current I
GND
I
OUT1
= I
OUT2
= I
OUT3
=100mA 5 10 mA
10mA < I
OUT_
< 100mA 5
LED Current-Sense Accuracy
(Note 3)
10mA < I
OUT_
< 150mA 7
%
I
OUT_
= 100mA (current pulsed) 0.75 1.5
Dropout Voltage (Note 4) ∆V
DO
I
OUT_
= 150mA (current pulsed) 1.2 2.25
V
Output Current Slew Rate Current rising, V
OUT_
= 4V 100 mA/µs
Output Current Leakage I
LEAK
V
PWM1
= V
PWM2
= V
PWM3
= 0V 1 µA
CURRENT SENSE
Regulated CS_ Voltage V
CS_
V
CS1
= V
CS2
= V
CS3
190 200 210 mV
OVERTEMPERATURE PROTECTION
Thermal Shutdown Temperature 165 °C
Thermal Shutdown Hysteresis 23 °C
+5V REGULATOR (REG)
Output Voltage V
REG
I
REG
= 0mA (Note 5) 4.75 5 5.25 V
REG Output Current I
REG
4.75V < V
REG
4mA
REG Short-Circuit Current I
REGSC
V
REG
= 0V (Note 6) 15 40 90 mA
LOGIC INPUT (PWM1, PWM2, PWM3)
PWM_ Input Bias Current I
PWM
V
PWM1
= V
PWM2
= V
PWM3
= 5V 1 µA
PWM_ Input-Voltage High V
IH
4V
PWM_ Input-Voltage Low V
IL
0.6 V
PWM_ Turn-On Delay 50% of V
PWM_
to 50% of ∆V
OUT_
475 ns
PWM_ Turn-Off Delay 50% of V
PWM_
to 50% of ∆V
OUT_
150 ns
PACKAGE THERMAL CHARACTERISTICS (Note 1)
16 TSSOP
Junction-to-Ambient Thermal Resistance (θ
JA
)...............+38.3°C/W
Junction-to-Case Thermal Resistance (θ
JC
)......................+3°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial
.
MAX16824/MAX16825
High-Voltage, Three-Channel Linear
High-Brightness LED Drivers
3
Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, C
REG
= 1µF to GND, I
REG
= 0, R
CS_
= 2Ω from CS_ to GND, T
J
= T
A
= -40°C to +125°C, unless otherwise noted. Typical
values are at T
J
= T
A
= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUTS (OUT1, OUT2, OUT3)
Turn-On Time t
R
PWM_ rising time, t
R
, is measured from 20%
to 80% of I
OUT_
1µs
Turn-Off Time t
F
PWM_ falling time, t
F
, is measured from
80% to 20% of I
OUT_
1µs
SPI INTERFACE (CLK, LE, OE, DIN, DOUT) (Figures 3 and 4)
DIN, CLK, LE, OE Input Bias
Current
V
DIN
= V
CLK
= V
LE
= V
OE
= 0 or 5V 1 µA
DIN, CLK, LE, OE Input-Voltage
High
V
IH
2.2 V
DIN, CLK, LE, OE Input-Voltage
Low
V
IL
0.5 V
CLK Clock Period t
CP
50% of CLK rising to 50% of next CLK
rising, Figure 3
50 ns
CLK Pulse-Width High t
CH
50% of CLK rising to 50% of CLK falling,
Figure 3
24 ns
CLK Pulse-Width Low t
CL
50% of CLK falling to 50% of CLK rising,
Figure 3
24 ns
DIN Setup Time t
DS
50% of DIN rising to 50% of CLK rising,
Figure 3
5ns
DIN Hold Time t
DH
50% of CLK rising to 50% of DIN falling,
Figure 3
10 ns
DOUT Propagation Delay t
DO
50% of CLK rising to 50% of DOUT rising/
falling, Figure 3
5ns
DOUT Rise/Fall Time t
DR
/t
DF
C
DOUT
= 10pF, 10% to 90% of DOUT
rising/falling edge (Note 7)
15 ns
DOUT Voltage High V
DOH
I
SOURCE
= 4mA 4.5 V
DOUT Voltage Low V
DOL
I
SINK
= 4mA 0.5 V
LE Pulse-Width High t
LW
50% of LE rising to 50% of LE falling,
Figure 3
20 ns
LE Setup Time t
LS
50% of CLK rising to 50% of LE rising,
Figure 3
15 ns
LE Rising to OUT_ Rising Delay t
LRR
50% of LE rising to 50% of OUT_ rising,
Figure 4
150 ns
LE Rising to OUT_ Falling Delay t
LRF
50% of LE rising to 50% of OUT_ falling,
Figure 4
475 ns
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX16824AUE+

Mfr. #:
Buy MAX16824AUE+
Manufacturer:
Maxim Integrated
Description:
LED Lighting Drivers 3Ch Linear HB
Lifecycle:
New from this manufacturer.
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