MM ...................................................................................200V
Lead Temperature (soldering, 10s) ................................. +300°C
Soldering Temperature (reflow) .......................................+260°C
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.
Electrical Characteristics
PARAMETER
V
IN
Input Voltage Range
V
IN
Quiescent Current
(Circuit of Figure 1. V
IN
= 12V, C
COMP
= 0.51nF, C
COUT
= 4.7µF, R
COMP
= 82.5kΩ, R
ISET
= 180kΩ, R
FSLCT
= 100kΩ, L = 10µH,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS
MAX17127 is enabled, V
EN
= 3.3V, V
IN
= 26V
MAX17127 is disabled, EN = AGND
MAX17127 is enabled, V
EN
= 3.3V,
5.4V < V
IN
< 26V, 0A < I
VDDIO
< 10mA
V
DDIO
Output Voltage
MAX17127 is enabled, V
EN
= 3.3V, V
IN
= 5V, I
VDDIO
= 10mA,
dropout condition
MAX17127 is disabled, EN = AGND, 0A < I
VDDIO
< 50µA
V
DDIO
Current Limit
V
DDIO
UVLO Threshold
V
IN
UVLO Threshold
BOOST CONVERTER
SW On-Resistance
SW Leakage Current
Operating Frequency
R
FSLCT
Range
Maximum Duty Cycle
Minimum On-Time
SW Current Limit
CONTROL INPUT
PWM, EN Logic-Input
High Level
PWM, EN Logic-Input Low
Level
EN Pulldown Resistor
120
200
2.1
0.8
280
V
V
kΩ
20mA from SW to PGND
40V on SW, T
A
= +25°C
R
FSLCT
= 100kΩ
R
FSLCT
= 400kΩ
Operating range
At f
SW
= 1MHz
(Note 1)
Duty cycle = 75%
3.12
0.95
0.225
90
91
95
50
3.9
80
4.7
0.12
1.0
0.25
0.25
1
1.05
0.275
500
Ω
µA
MHz
kΩ
%
ns
A
V
DDIO
is forced to 4.2V
Rising edge, typical hysteresis = 250mV
Falling edge
Rising edge
4.85
4.6
3.1
25
3.90
4.3
4.55
MIN
5
2.7
5
5
4.75
3.7
45
4.00
4.5
4.75
4.1
70
4.10
4.7
4.95
V
mA
V
V
TYP
MAX
26
3.2
10
5.15
V
UNITS
V
mA
µA
www.maximintegrated.com
Maxim Integrated
│
2
MAX17127
Six-String WLED Driver with
Integrated Step-Up Converter
Electrical Characteristics (continued)
PARAMETER
FPO OUTPUT
FPO Off-Leakage Current
FPO On Output-Voltage
Low
INPUT LEAKAGE
PWM Leakage Current
OVP Leakage Current
LED CURRENT
R
ISET
= 120kΩ
Full-Scale FB_ Output
Current
R
ISET
= 360kΩ
V
ISET
< 0.7V
R
ISET
Range
Current Regulation
Between Strings
Minimum FB_ Regulation
Voltage
FB_ On-Resistance
FB_ Bias Current
FB_ Minimum On-Time
FAULT PROTECTION
OVP Threshold Voltage
FB_ Overvoltage
Threshold
FB_ Enable Threshold
Voltage
FB_ Open Threshold
Voltage
FB_ Check LED Source
Current
FB_ Check LED Time
Thermal-Shutdown
Threshold
Overcurrent Fault Timer
PWM CONTROL
PWM Input On-Time
PWM Input Frequency
Range
(Note 1)
Latchoff timer
Operating range
Accuracy = 3%
10mA < I
FB
_< 30mA
I
FB
_ = 30mA
I
FB
_ = 20mA
I
FB
_ = 10mA
R
ISET
= 180kΩ
Fault inactive, T
A
= +25°C
I
SINK
= 1mA, fault active
(Circuit of Figure 1. V
IN
= 12V, C
COMP
= 0.51nF, C
COUT
= 4.7µF, R
COMP
= 82.5kΩ, R
ISET
= 180kΩ, R
FSLCT
= 100kΩ, L = 10µH,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS
MIN
TYP
MAX
100
0.4
UNITS
nA
V
T
A
= +25NC, V
PWM
= 0V, V
PWM
= 5V
T
A
= +25NC, V
OVP
= 0V, V
OVP
= 5V
-1
-0.1
29.1
19.6
9.7
0.2
100
120
-2.0
400
555
460
350
17.5
0.1
400
1.23
7
580
1.25
8
1.2
130
0.4
0.7
1.0
+150
128
400
0.1
30
20
10
0.3
+1
+0.1
30.9
20.4
10.3
0.4
400
360
+2.0
770
670
630
28.4
1
700
1.27
9
µA
µA
mA
kΩ
%
mV
Ω
µA
ns
V
V
V
V
FB
_ = 50mV (includes 10Ω sense resistor)
V
FB
_ = 40V, T
A
= +25°C
Rising edge, typical hysteresis = 90mV
280
1.3
1.3
mV
mA
ms
°C
µs
ns
25
kHz
www.maximintegrated.com
Maxim Integrated
│
3
MAX17127
Six-String WLED Driver with
Integrated Step-Up Converter
Electrical Characteristics
PARAMETER
V
IN
Input Voltage Range
V
IN
Quiescent Current
(Circuit of Figure 1. V
IN
= 12V, C
COMP
= 0.51nF, C
COUT
= 4.7µF, R
COMP
= 82.5kΩ, R
ISET
= 180kΩ, R
FSLCT
= 100kΩ, L = 10µH,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS
MAX17127 is enabled, V
EN
= 3.3V, V
IN
= 26V
MAX17127 is disabled, EN = AGND
MAX17127 is enabled, V
EN
= 3.3V,
5.4V < V
IN
< 26V, 0A < I
VDDIO
< 10mA
V
DDIO
Output Voltage
MAX17127 is enabled , V
EN
= 3.3V, V
IN
= 5V,
I
VDDIO
= 10mA, dropout condition
EN = AGND, 0A < I
VDDIO
< 50µA
V
DDIO
Current Limit
V
DDIO
UVLO Threshold
V
IN
UVLO Threshold
BOOST CONVERTER
SW On-Resistance
SW Leakage Current
Operating Frequency
R
FSLCT
Operative Range
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
R
ISET
= 120kΩ
Full-Scale FB_ Output Current
R
ISET
= 180kΩ
R
ISET
= 360kΩ
V
ISET
< 0.7V
R
ISET
Range
Current Regulation Between
Strings
Operating range
Accuracy = 3%
10mA < I
FB
_< 30mA
29.1
19.4
9.7
0.2
100
120
-2.0
30.9
20.6
10.3
0.4
400
360
+2.0
kΩ
%
mA
I
SINK
= 1mA, fault active
0.4
V
110
2.1
0.8
290
V
V
kΩ
At f
SW
= 1MHz
With suitable OVP network
(Note 1)
20mA from SW to PGND
40V on SW, T
A
= +25°C
R
FSLCT
= 100kΩ
R
FSLCT
= 400kΩ
0.95
0.225
90
92
45
80
0.25
1
1.05
0.28
500
Ω
μA
MHz
kΩ
%
V
ns
V
DDIO
is forced to 4.2V
Rising edge, typical hysteresis = 250mV
Falling edge
Rising edge
4.85
4.6
3.1
25
3.90
4.3
4.55
4.1
70
4.10
4.7
4.95
mA
V
V
MIN
5
TYP
MAX
26
3.2
15
5.15
V
UNITS
V
mA
μA
www.maximintegrated.com
Maxim Integrated
│
4
MAX17127
Six-String WLED Driver with
Integrated Step-Up Converter
Electrical Characteristics (continued)
PARAMETER
I
FB_
= 30mA
Minimum FB_ Regulation Voltage I
FB
_= 20mA
I
FB
_= 10mA
FB_ On-Resistance
FB_ Bias Current
FB_ Minimum On-Time
FAULT PROTECTION
OVP Threshold Voltage
FB_ Overvoltage Threshold
FB_ Open Threshold Voltage
FB_ Check LED Source Current
FB_ Check LED Time
Overcurrent Fault Timer
PWM CONTROL
PWM Input On-Time
PWM Input Frequency Range
Latchoff timer
(Circuit of Figure 1. V
IN
= 12V, C
COMP
= 0.51nF, C
COUT
= 4.7µF, R
COMP
= 82.5kΩ, R
ISET
= 180kΩ, R
FSLCT
= 100kΩ, L = 10µH,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS
MIN
400
TYP
MAX
770
670
630
28.4
1
400
Rising edge, typical hysteresis = 90mV
1.23
7
130
0.4
0.7
88
400
0.1
25
700
1.27
9
280
1.3
1.3
168
Ω
μA
ns
V
V
mV
mA
ms
μs
ns
kHz
mV
UNITS
V
FB
_= 50mV (includes 10Ω sense resistor)
V
FB
_ = 40V, T
A
= +25°C
Note 1:
Specifications are guaranteed by design, not production tested.
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