MAX16838_11 Datasheet, PDF (3/21 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
RT OSCILLATOR
Switching Frequency Range
Duty Cycle
Oscillator Frequency Accuracy
Synchronization Logic-High
Synchronization Logic-Low
Logic-Level Before SYNC
Capacitor
SYMBOL
CONDITIONS
fSW
DMAX
fSW = 200kHz
fSW = 2000kHz
fSW = 200kHz to 2MHz
VRT rising
VRT falling
MIN TYP MAX UNITS
200
2000 kHz
87
90
95
%
83
85
91
%
-7.5
+7.5
%
1.8
3.6
V
2.5
V
3.1
3.8
V
Synchronization Pulse Width
50
ns
SYNC Frequency Range
PWM COMPARATOR
Leading-Edge Blanking
Propagation Delay to NDRV
SLOPE COMPENSATION
Slope Compensation Peak
Voltage per Cycle
fSYNC
Including leading-edge blanking time
Voltage ramp added to CS
1.1 x
fSW
1.5 x
fSW
Hz
66
ns
100
ns
0.12
V
CS LIMIT COMPARATOR
CS Threshold Voltage
CS Limit Comparator Propagation
Delay to NDRV
VCS_MAX
VCOMP = 3V
10mV overdrive (including leading-edge
blanking time)
285 300 315
mV
100
ns
CS Input Current
ERROR AMPLIFIER
OUT_ Regulation Voltage
Transconductance
No-Load Gain
COMP Sink Current
COMP Source Current
MOSFET DRIVER
NDRV On-Resistance
Peak Sink Current
Peak Source Current
POWER MOSFET
Power Switch On-Resistance
Switch Leakage Current
Switch Gate Charge
ICS
0 P VCS P 0.35V
Gm
A
ISINK
ISOURCE
VDIM = 5V
(Note 4)
VDIM = VOUT_ = 5V, VCOMP = 3V
VDIM = 5V, VOUT_ = VCOMP = 0V
ISINK = 100mA, VIN > 5.5V
ISOURCE = 100mA, VIN > 5.5V
VNDRV = 5V
VNDRV = 0V
ISWITCH = 0.5A, VGS = 5V
VDRAIN = 40V, VGATE = 0V
VDRAIN = 40V, VGS = 4.5V
-1.3
+0.5
FA
0.9
1
1.1
V
340 600 880
FS
50
dB
400 800
FA
400 800
FA
1.5
4
I
1.5
4
I
0.8
A
0.8
A
0.15 0.35
I
0.003 1.2
FA
3.1
nC
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