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EEPROM-Programmable, High-Voltage, 350mA
LED Drivers with LED Current Foldback
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +45V
DIM, OUT, EN to GND ................................-0.3V to (V IN + 0.3V)
IN Slew Rate (20V < V IN < 45V) ...................................250mV/μs
SDA, SCL (MAX16805), TFN/SDA,
TFP/SCL (MAX16806) to GND...............................-0.3V to +6V
CFD, CS+, V5 to GND ..............................................-0.3V to +6V
DGND and CS- to GND.........................................-0.3V to +0.3V
Maximum Current Into Any Pin (except IN and OUT) ......±20mA
Continuous Power Dissipation (T A = +70°C)
20-Pin Thin QFN (derate 34.5mW/°C above +70°C)....2758.6mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
OUT Short Circuited to GND Duration (V IN < +16V)..........1 hour
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V IN = V EN = 12V, C V5 = 0.1μF, I V5 = 0, CS- = GND, R SENSE = 0.56 Ω , V DIM = 4V, DGND = GND, TFP/SCL = 5V, TFN/SDA = 0V,
SW = CFD = Open, T A = T J = -40°C to +125°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage Range
Ground Current
Shutdown Supply Current
Guaranteed Output Current
Output Current Accuracy
Dropout Voltage (Note 3)
Output Current Slew Rate
(External PWM Signal at DIM)
Short-Circuit Current
V IN
I G
I SHDN
I OUT
Δ V DO
(Note 2)
I LOAD = 350mA
V EN ≤ 0.3V
R SENSE = 0.55 Ω
35mA < I OUT < 350mA, R SENSE tolerance
not included
I OUT = 350mA, 12V < V IN < 40V
I OUT = 350mA, 6.5V < V IN < 12V
Current rising, DIM rising to 4V
Current falling, DIM falling to 0.6V
V OUT = 0V
5.5
350
2.5
12
0.4
0.5
17
17
600
40
4.5
40
3.0
1.2
1.5
V
mA
μA
mA
%
V
mA/μs
mA
ENABLE INPUT
EN Input Current
EN Input-Voltage High
EN Input-Voltage Low
I EN
V IH
V IL
2.8
100
0.6
nA
V
V
Enable Turn-On Time
t ON
EN rising edge to 90% of OUT
225
μs
5V REGULATOR
Output Voltage Regulation
(MAX16806)
V5
6.5V < V IN < 40V
0 < I V5 < 0.5mA,
SW = GND
0 < I V5 < 2mA,
SW = open
4.9
4.9
5.1
5.1
5.3
5.3
V
Output Voltage Regulation
(MAX16805)
V5
0 < I V5 < 2mA, 6.5V < V IN < 40V
4.9
5.1
5.3
V
CURRENT SENSE
V SENSE = [V CS+ - V CS- ], Binning
Regulated R SENSE Voltage
V RSNS
Adjustment register at factory default
192
198
204
mV
(0x0F)
Input Current (CS+)
Input Current (CS-)
V CS+ = 210mV
V CS+ = 210mV
12
-75
μA
μA
2
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