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