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MAX16824AUE+

P1-P3P4-P6P7-P9P10-P12P13-P13
MAX16824/MAX16825
High-Voltage, Three-Channel Linear
High-Brightness LED Drivers
4
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
CLK Rising to OUT_ Rising Delay t
CRR
50% of CLK rising to 50% of OUT_ rising,
Figure 4
150 ns
CLK Rising to OUT_ Falling Delay t
CRF
50% of CLK rising to 50% of OUT_ falling,
Figure 4
475 ns
OE Rising to OUT_ Rising Delay t
OEH
50% of OE rising to 50% of OUT_ rising,
Figure 3
150 ns
OE Falling to OUT_ Falling Delay t
OEL
50% of OE falling to 50% of OUT_ falling,
Figure 3
475 ns
Note 2: All devices are 100% production tested at T
J
= +25°C and T
J
= +125°C. Limits to -40°C are guaranteed by design.
Note 3: This specification does not include sense resistor tolerance and ground error.
Note 4: Dropout is measured as follows: R
CS_
= 1.21Ω from CS_ to GND. Force 100mA into OUT_ and measure the dropout voltage
from OUT_ to CS_. DVDO = (∆OUT_ - V
CS_
).
Note 5: OUT’s current regulation varies with load across REG (see the
Typical Operating Characteristics
).
Note 6: Overtemperature protection does not function if the output of the 5V reference (REG) is shorted to ground.
Note 7: Guaranteed by design, not production tested.
0
0.2
0.1
0.5
0.4
0.3
0.6
0.7
0.9
0.8
1.0
-40 -10 5-25 20 35 50 65 80 95 110 125
DROPOUT VOLTAGE vs. TEMPERATURE
MAX16824toc01
TEMPERATURE (
°
C)
DROPOUT VOLTAGE (V)
I
LOAD
= 100mA
0.182
0.192
0.187
0.197
0.202
0.207
0604515 30 75 90 105 120 135 150
CS_ VOLTAGE vs. OUTPUT CURRENT
MAX16824 toc02
OUTPUT CURRENT (mA)
V
CS_
(V)
OUTPUT CURRENT vs. INPUT VOLTAGE
MAX16824 toc03
V
IN
(V)
OUTPUT CURRENT (mA)
262420 226 8 10 12 14 16 182 4
10
30
50
70
90
110
130
150
170
190
-10
028
I
LOAD
= 150mA
I
LOAD
= 100mA
Typical Operating Characteristics
(V
IN
= 12V, C
REG
= 1µF to GND, I
REG
= 0, R
CS_
= 2Ω from CS_ to GND, T
A
= +25°C, unless otherwise noted. Typical values are at
T
A
= +25°C.)
0
40
20
100
80
60
120
140
180
160
200
-40 -10 5-25 20 35 50 65 80 95 110 125
OUTPUT CURRENT vs. TEMPERATURE
MAX16824toc04
TEMPERATURE (
°
C)
OUTPUT CURRENT (mA)
I
OUT_
= 150mA
I
OUT_
= 95mA
I
OUT_
= 10mA
SUPPLY CURRENT
vs. TEMPERATURE
MAX16824 toc05
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
1109580655035205-10-25
2.45
2.65
2.85
3.05
3.25
3.45
2.25
-40 125
V
IN
= 28V
V
IN
= 6.5V
V
PWM1
= V
PWM2
= V
PWM3
= 0
OUTPUT VOLTAGE vs. TEMPERATURE
MAX16824 toc06
V
REG
(V)
4.92
4.94
4.96
4.98
5.00
5.02
5.04
5.06
5.08
5.10
4.90
I
LOAD
= 0
TEMPERATURE (°C)
1109580655035205-10-25-40 125
I
LOAD
= 4mA
I
LOAD
= 1mA
CS_ VOLTAGE vs. REG OUTPUT CURRENT
MAX16824 toc07
I
REG
(mA)
V
CS_
(V)
986 72 3 4 51
0.183
0.184
0.186
0.185
0.187
0.188
0.189
0.190
0.191
0.192
0.193
0.194
0.195
0.196
0.197
0.198
0.199
0.200
0.182
010
I
LOAD
= 100mA
I
LOAD
= 150mA
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX16824 toc08
V
IN
(V)
V
REG
(V)
24204 8 12 16
4.965
4.970
4.975
4.980
4.985
4.990
4.995
5.000
4.960
028
I
REG
= 0
I
REG
= 1mA
I
REG
= 4mA
2µs/div
LED CURRENT FALL TIME
0V
0A
2V/div
I
OUT_
100mA/div
MAX16824 toc09
I
LED
= 150mA
V
IN
= 12V
PULSED AT 200Hz
(50% DUTY CYCLE)
V
PWM_
2µs/div
LED CURRENT RISE TIME
0V
0A
2V/div
I
OUT_
100mA/div
MAX16824 toc10
I
LED
= 150mA
V
IN
= 12V
PULSED AT 200Hz
(50% DUTY CYCLE)
V
PWM_
20µs/div
330Hz DIMMED OPERATION
0V
0A
V
PWM_
2V/div
I
OUT_
100mA/div
MAX16824 toc11
I
LOAD
= 150mA
V
IN
= 12V
PWM_ PULSED
AT 330Hz
(1% DUTY CYCLE)
MAX16824/MAX16825
High-Voltage, Three-Channel Linear
High-Brightness LED Drivers
5
Maxim Integrated
Typical Operating Characteristics (continued)
(V
IN
= 12V, C
REG
= 1µF to GND, I
REG
= 0, R
CS_
= 2Ω from CS_ to GND, T
A
= +25°C, unless otherwise noted. Typical values are at
T
A
= +25°C.)
MAX16824/MAX16825
High-Voltage, Three-Channel Linear
High-Brightness LED Drivers
6
Maxim Integrated
Pin Description
PIN
MAX16824 MAX16825
NAME FUNCTION
1 1 OUT1
Channel 1 LED Driver Output. OUT1 is an open-drain, constant-current-sinking output
rated to 36V.
2 2 CS1
Channel 1 Sense Amplifier Negative Input. Connect a current-sense resistor between
CS1 and GND to program the output current level for channel 1.
3 3 IN Positive Input Supply. Bypass with a 0.1µF (min) capacitor to GND.
4 4 REG +5V-Regulated Output. Connect a 1µF capacitor from REG to GND.
5, 6, 10, 14 5, 14 N.C. No Connection. Must be left unconnected.
7 — PWM1
Dimming Input 1. PWM1 is a dimming input for channel 1. A logic-low turns off OUT1 and
a logic-high turns on OUT1.
8 — PWM2
Dimming Input 2. PWM2 is a dimming input for channel 2. A logic-low turns off OUT2 and
a logic-high turns on OUT2.
9 — PWM3
Dimming Input 3. PWM3 is a dimming input for channel 3. A logic-low turns off OUT3 and
a logic-high turns on OUT3.
11 11 GND Ground
12 12 OUT3
Channel 3 LED Driver Output. OUT3 is an open-drain, constant-current-sinking output
rated to 36V.
13 13 CS3
Channel 3 Sense Amplifier Negative Input. Connect a current-sense resistor between
CS3 and GND to program the output current level for channel 3.
15 15 CS2
Channel 2 Sense Amplifier Negative Input. Connect a current-sense resistor between
CS2 and GND to program the output current level for channel 2.
16 16 OUT2
Channel 2 LED Driver Output. OUT2 is an open-drain, constant-current-sinking output
rated to 36V.
—7DIN
Serial-Data Input. Data is loaded into the internal 3-bit shift register on the rising edge of
CLK.
—8LE
Latch-Enable Input. Data loaded transparently from the internal shift register to the
output latch while LE is high. Data is latched into the output latch on the LE’s falling edge
and retained while LE is low.
—9OE
Output Enable Input. Drive OE high to place all outputs into a high-impedance mode
without altering the contents of the output latches. Drive OE low to force all outputs to
follow the state of the output latches.
—10DOUT
Serial-Data Output. Data is clocked out of the internal 3-bit shift register to DOUT on the
rising edge of CLK. DOUT is a replica of the shift register’s last bit.
— 6 CLK Clock Input
——EP
Exposed Pad. Connect EP to a large-area ground plane for effective power dissipation.
Do not use as the IC ground connection.
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX16824AUE+

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