MAX16838_13 Datasheet, PDF (4/21 Pages) Maxim Integrated Products – Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Controller

MAX16838
Integrated, 2-Channel, High-Brightness LED Driver
with High-Voltage Boost and SEPIC Controller
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VEN = 12V, RRT = 12.2kI, RISET = 15kI, CVCC = 1FF, VCC = VDRV = VCFB, DRAIN, COMP, OUT_, FLT = unconnected, VOV
= VCS = VLEDGND = VDIM = VPGND = VSGND = 0V, VGATE = VNDRV, TA = TJ = -40NC to +125NC, unless otherwise noted. Typical
values are at TA = 25NC.) (Note 2)
PARAMETER
LED CURRENT SINKS
OUT_ Current Range
LED Strings Current Matching
Maximum Peak-to-Peak Boost
Ripple
Output Current Accuracy
OUT_ Leakage Current
Current Foldback Threshold
Voltage
CFB Input Bias Current
ENABLE COMPARATOR (EN)
Enable Threshold
Enable Threshold Hysteresis
Enable Input Current
DIM LOGIC
DIM Input Logic-High
DIM Input Logic-Low
Hysteresis
DIM Input Current
SYMBOL
CONDITIONS
MIN
IOUT_
VDIM = 5V, VOUT_ = 1.0V
IOUT_ = 100mA, RISET = 15kI
1% IOUT variation, IOUT = 100mA,
RISET = 15kI
IOUT_ = 100mA,
RISET = 15kI
TA = +25NC
TA = -40NC to +125NC
IOUT_ = 20mA, RISET
= 75kI
TA = -40NC to +125NC
VDIM = 0V, VOUT_ = 40V
20
97
95
18.7
0 P VCFB P 1.3V
VENHI
VEN_HYS
VEN rising
VEN = 40V
VIH
VIL
VDIM_HYS
IDIM
VDIM = 5V or 0
-0.3
1.1
-500
2.1
-600
TYP
0.3
100
100
20
1
1.23
1.24
71
+50
110
MAX UNITS
150
mA
Q2
%
0.5
V
103
mA
105
mA
21.3
mA
300
nA
V
+0.3
FA
1.34
V
mV
+700
nA
V
0.8
V
mV
+100
nA
DIM to LED Turn-On Time
VDIM rising edge to 90% of set current
50
290 1000
ns
DIM to LED Turn-Off Time
IOUT_ Rise Time
IOUT_ Fall Time
LED FAULT DETECTION
LED Shorted Fault Indicator
Threshold
LED String Shorted Shutoff
Threshold
Shorted LED Detection FLAG
Delay
VDIM falling edge to 10% of set current
tR
Rise time measured from 10% to 90%
tF
Fall time measured from 90% to 10%
TA = +125NC
TA = +125NC
10
121 700
ns
120 600
ns
50
500
ns
3.1
5.5
V
3.55 4.2 4.85
6
9.5
V
6.8
7.7
8.6
6
Fs
4  
Maxim Integrated