MAX16809
Integrated 16-Channel LED Driver with
Switch-Mode Boost and SEPIC Controller
8 _______________________________________________________________________________________
0.20
0.24
0.22
0.30
0.28
0.26
0.32
0.34
0.38
0.36
0.40
CURRENT-SENSE TRIP THRESHOLD
vs. TEMPERATURE
MAX16809 toc09
CS THRESHOLD (V)
-40 -10 5 20-25 35 50 9580 11065 125
TEMPERATURE (°C)
TIMING RESISTANCE
vs. OSCILLATOR FREQUENCY
MAX16809 toc10
FREQUENCY (Hz)
R
T
(kΩ)
1M100k
1
10
100
1000
0.1
10k 10M
C
T
= 1nF
C
T
= 560pF
C
T
= 220pF
C
T
= 100pF
C
T
= 10nF
C
T
= 4.7nF
C
T
= 3.3nF
C
T
= 2.2nF
OUT IMPEDANCE vs. TEMPERATURE
(R
DS_ON
PMOS DRIVER)
MAX16809 toc11
TEMPERATURE (°C)
R
DS_ON
(Ω)
1109565 80-10 5 20 35 50-25
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
4.0
4.2
4.4
4.6
4.8
5.0
2.0
-40 125
I
SOURCE
= 100mA
0
2
1
5
4
3
6
7
9
8
10
OUT IMPEDANCE vs. TEMPERATURE
(R
DS_ON
NMOS DRIVER)
MAX16809 toc12
R
DS_ON
(Ω)
-40 -10 5 20-25 35 50 9580 11065 125
TEMPERATURE (°C)
I
SINK
= 200mA
0
20
10
50
40
30
60
70
90
80
100
PROPAGATION DELAY FROM CURRENT-LIMIT
COMPARATOR TO OUT vs. TEMPERATURE
MAX16809 toc13
PROPAGATION DELAY (ns)
-40 -10 5 20-25 35 50 9580 11065 125
TEMPERATURE (°C)
ERROR-AMPLIFIER OPEN-LOOP GAIN
AND PHASE vs. FREQUENCY
MAX16809 toc14
FREQUENCY (Hz)
GAIN (dB)
1M100k1k 10k10 1001
0
20
40
60
80
100
120
140
-20
0.01
100M
10M
-165
-140
-115
-90
-65
-40
-15
10
-190
PHASE
GAIN
PHASE (DEGREES)
1.5
1.6
2.2
1.8
1.7
1.9
2.0
2.1
2.3
-40 -10 5 20-25 35 50 9580 11065 125
COMP VOLTAGE LEVEL TO TURN
OFF DEVICE vs. TEMPERATURE
MAX16809 toc15
TEMPERATURE (°C)
V
COMP
(V)
V
CC
= 15V
2.0
3.0
2.5
4.0
3.5
5.0
4.5
5.5
6.5
6.0
7.0
20 220 320 420120 520 620 720 920820 1020
SUPPLY CURRENT
vs. OSCILLATOR FREQUENCY
MAX16809 toc16
FREQUENCY (kHz)
I
CC
(mA)
T
A
= +125°C
C
T
= 100pF
T
A
= -40°C
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS OFF, R
SET
= 720Ω)
MAX16809 toc17
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.04.54.03.5
1.85
1.90
1.95
2.00
1.80
3.0 5.5
T
A
= +125°C
T
A
= +85°C
T
A
= -40°C
T
A
= +25°C
Typical Operating Characteristics (continued)
(V
CC
= +15V, V+ = 3V to 5.5V, R
T
= 10kΩ, C
T
= 3.3nF, V
REF
= COMP = open, C
REF
= 0.1μF, V
FB
= 2V, CS = AGND = PGND = 0V.
Typical values are at T
A
= +25°C, unless otherwise noted.)
