MAX16839 Datasheet, PDF (3/11 Pages) Maxim Integrated Products – High-Voltage, Linear High-Brightness LED Driver with Open-LED Fault Detect

High-Voltage, Linear High-Brightness LED
Driver with Open-LED Fault Detect
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 12V, VFLTS = 0V, RCS = 4.07I, VGND = 0V, DIM = unconnected, CIN = 0.1FF (Note 2), TJ = TA = -40NC to +125NC, unless
otherwise noted. Typical values are at T_A = +25NC.) (Note 3)
PARAMETER
FLTS Charge Current
FLTS Discharge Current
FLTS Threshold To Turn Off LED
Current Sink
DIM LOGIC
Input High Voltage
Input Low Voltage
DIM Voltage Logic Hysteresis
DIM Pullup Current
DIM Pulldown Current
DIM Pulse Width
DIM Frequency
LEAKAGE CURRENTS
SINK Leakage Current
FLTS Leakage Current
THERMAL SHUTDOWN
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
SYMBOL
ICFLTS
VCS P 25mV
V_FLTS = 0.5V
CONDITIONS
VFLTH
V_IH
VIL
VDIM_HYS
VDIM = 0V
VDIM = 0.8V, VIN = 2.4V
fDIM
VSINK = 40V, VDIM = 0V
VFLTS = 8V, VIN = 0V
Temperature rising
MIN TYP MAX UNITS
0.65 2.8
4.8
mA
2.25
5
7.25
FA
0.95 1.3 1.65
V
2.1
V
0.8
V
0.15
V
10
30
60
FA
0.385
1
1.5
mA
70
Fs
10
kHz
1
FA
1
FA
160
NC
15
NC
Note 2: A 51I resistor is connected between SINK and a 6.5V supply to reduce power dissipation during the factory test.
Note 3: All devices are 100% production tested at TA = +25NC. Limits over temperature are guaranteed by design.
Note 4: Guaranteed by design and not production tested.
Note 5: Internal switch resistance is measured with I_SINK = 0.95 x I_SINK0 (I_{SINK0 is} I_SINK at V_SINK = 0.9V).
Note 6: Supply turn-on delay will be measured by rising supply in 6Fs from GND to 12V, and measurement starts when V_IN = 4V
(typical UVLO).
Note 7: DIM is kept high to avoid delay due to high capacitance from test setup. In applications, a 30FA pullup current charges
parasitic capacitance at DIM with negligible delay. Ensure that unnecessary capacitance is not added at DIM during the
PCB layout.
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