MAX17127 Maxim Integrated Products, MAX17127 Datasheet - Page 4

• Manufacturer Part Number: MAX17127
• Description: Six-String WLED Driver
• Manufacturer: Maxim Integrated Products

ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1. V
T
Six-String WLED Driver with Integrated
Step-Up Converter
4
V
V
V
V
V
V
BOOST CONVERTER
SW On-Resistance
SW Leakage Current
Operating Frequency
R
Maximum Duty Cycle
Boost Output Voltage
Minimum On-Time
CONTROL INPUT
PWM, EN Logic-Input High Level
PWM, EN Logic-Input Low Level
EN Pulldown Resistor
FPO OUTPUT
FPO On Output-Voltage Low
LED CURRENT
Full-Scale FB_ Output Current
R
Current Regulation Between
Strings
Minimum FB_ Regulation Voltage
FB_ On-Resistance
FB_ Bias Current
A
IN
IN
DDIO
DDIO
DDIO
IN
FSLCT
ISET
= -40°C to +85°C, unless otherwise noted. Typical values are at T
______________________________________________________________________________________
Input Voltage Range
Quiescent Current
UVLO Threshold
Range
Output Voltage
Current Limit
UVLO Threshold
Operative Range
PARAMETER
IN
= 12V, C
COMP
MAX17127 is enabled, V
MAX17127 is disabled, EN = AGND
MAX17127 is enabled, V
5.4V < V
MAX17127 is enabled , V
I
EN = AGND, 0A < I
V
Rising edge, typical hysteresis = 250mV
Falling edge
Rising edge
20mA from SW to PGND
40V on SW, T
R
R
At f
With suitable OVP network
(Note 1)
I
R
R
R
V
Operating range
Accuracy = 3%
10mA < I
I
I
I
V
V
VDDIO
SINK
FB_
FB
FB
DDIO
ISET
FB
FB
FSLCT
FSLCT
ISET
ISET
ISET
_ = 20mA
_ = 10mA
SW
_ = 50mV (includes 10I sense resistor)
_ = 40V, T
= 0.51nF, C
= 30mA
= 1mA, fault active
= 120kI
= 180kI
= 360kI
< 0.7V
is forced to 4.2V
= 1MHz
= 10mA, dropout condition
= 100kI
= 400kI
IN
FB
< 26V, 0A < I
_ < 30mA
A
A
= +25NC
= +25NC
COUT
VDDIO
CONDITIONS
= 4.7µF, R
VDDIO
EN
EN
EN
< 50FA
= 3.3V, V
= 3.3V,
= 3.3V, V
< 10mA
COMP
A
= +25°C.)
IN
IN
= 26V
= 82.5kΩ, R
= 5V,
ISET
= 180kΩ, R
0.225
4.85
3.90
4.55
0.95
29.1
19.4
MIN
-2.0
110
100
120
400
4.6
3.1
4.3
2.1
9.7
0.2
25
90
92
5
FSLCT
TYP
= 100kΩ, L = 10µH,
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MAX
+2.0
5.15
4.10
4.95
0.25
1.05
0.28
30.9
20.6
10.3
28.4
500
290
400
770
670
630
3.2
4.1
4.7
0.8
0.4
0.4
360
26
15
70
45
80
1
1
UNITS
MHz
mA
mA
mA
mV
µA
µA
kω
kω
kω
µA
ns
%
%
ω
ω
V
V
V
V
V
V
V
V