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MAX16838
Integrated, 2-Channel, High-Brightness LED Driver
with High-Voltage Boost and SEPIC Controller
ELECTRICAL CHARACTERISTICS (continued)
(V IN = V EN = 12V, R RT = 12.2k I , R ISET = 15k I , C VCC = 1 F F, V CC = V DRV = V CFB , DRAIN, COMP, OUT_, FLT = unconnected, V OV
= V CS = V LEDGND = V DIM = V PGND = V SGND = 0V, V GATE = V NDRV , T A = T J = -40 N C to +125 N C, unless otherwise noted. Typical
values are at T A = 25 N C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LED CURRENT SINKS
OUT_ Current Range
LED Strings Current Matching
Maximum Peak-to-Peak Boost
Ripple
I OUT_
V DIM = 5V, V OUT_ = 1.0V
I OUT_ = 100mA, R ISE T = 15k I
1% I OUT variation, I OUT = 100mA,
R ISET = 15k I
20
0.3
150
Q 2
0.5
mA
%
V
I OUT_ = 100mA,
T A = +25 N C
97
100
103
mA
Output Current Accuracy
R ISET = 15k I
I OUT_ = 20mA, R ISET
= 75k I
T A = -40 N C to +125 N C
T A = -40 N C to +125 N C
95
18.7
100
20
105
21.3
mA
mA
OUT_ Leakage Current
Current Foldback Threshold
Voltage
CFB Input Bias Current
V DIM = 0V, V OUT_ = 40V
0 P V CFB P 1.3V
-0.3
1
1.23
300
+0.3
nA
V
F A
ENABLE COMPARATOR (EN)
Enable Threshold
V ENHI
V EN rising
1.1
1.24
1.34
V
Enable Threshold Hysteresis
V EN_HYS
71
mV
Enable Input Current
V EN = 40V
-500
+50
+700
nA
DIM LOGIC
DIM Input Logic-High
DIM Input Logic-Low
Hysteresis
V IH
V IL
V DIM_HYS
2.1
110
0.8
V
V
mV
DIM Input Current
I DIM
V DIM = 5V or 0
-600
+100
nA
DIM to LED Turn-On Time
DIM to LED Turn-Off Time
V DIM rising edge to 90% of set current
V DIM falling edge to 10% of set current
50
10
290
121
1000
700
ns
ns
I OUT_ Rise Time
I OUT_ Fall Time
t R
t F
Rise time measured from 10% to 90%
Fall time measured from 90% to 10%
120
50
600
500
ns
ns
LED FAULT DETECTION
LED Shorted Fault Indicator
Threshold
LED String Shorted Shutoff
Threshold
T A = +125 N C
T A = +125 N C
3.1
3.55
6
6.8
4.2
7.7
5.5
4.85
9.5
8.6
V
V
Shorted LED Detection FLAG
Delay
4
6
F s
Maxim Integrated
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MAX16839ATT+T 功能描述:LED照明驱动器 High-Voltage Linear w/LED Open Detect RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N