MAX16838_11 Datasheet, PDF (5/21 Pages) Maxim Integrated Products – Integrated, 2-Channel, High-Brightness LED Driver with High-Voltage Boost and SEPIC Controller

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
FLT LOGIC
Output-Voltage Low
Output Leakage Current
OVERVOLTAGE PROTECTION
OV Trip Threshold
OV Hysteresis
OV Input Bias Current
THERMAL SHUTDOWN
Thermal Shutdown
Thermal Shutdown Hysteresis
SYMBOL
CONDITIONS
VOL VIN = 4.75V and ISINK = 5mA
VFILT = 5.5V
VOV rising
0 P VOV P 1.3V
MIN TYP MAX UNITS
-300
0.4
V
+300
nA
1.19 1.23 1.265
V
70
mV
-100
+100
nA
165
o_C
15
o_C
Note 2: All devices are 100% tested at TA = +125NC. Limits over temperature are guaranteed by design, not production tested.
Note 3: The shutdown current does not include currents in the OV and CFB resistive dividers.
Note 4: Gain = DVCOMP/DVCS, 0.05V < VCS < 0.15V.
Typical Operating Characteristics
(VIN = VEN = 12V, RRT = 12.2kI, RISET = 15kI, CVCC = 1FF, VCC = VDRV = VCFB, VDRAIN = VCOMP = VOUT_, FLT = unconnected,
VOV = VCS = VLEDGND = VDIM = VPGND = VSGND = 0V, VGATE = VNDRV, TA = +25NC, unless otherwise noted.)
SWITCHING WAVEFORM AT 200Hz
(50% DUTY CYCLE)
MAX16838 toc01
VLX
10V/div
0V
ILED
100mA/div
0A
VOUT
20V/div
0V
1ms/div
IIN vs. SUPPLY VOLTAGE
5.0
4.5
4.0
TA = +125°C
3.5
TA = +25°C
3.0
2.5
2.0
4
TA = -40°C
VIN = 12V
8 12 16 20 24 28 32 36 40
SUPPLY VOLTAGE (V)
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