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Offline and DC-DC PWM Controllers for
High-Brightness LED Drivers
ABSOLUTE MAXIMUM RATINGS
IN to GND .......................................................................... -0.3V to +30V
V CC to GND ...................................................................... -0.3V to +13V
DIM/FB, COMP, UVLO, CS to GND..........................-0.3V to +6V
NDRV to GND.............................................-0.3V to (V CC + 0.3V)
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range ............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Continuous Power Dissipation (T A = +70°C)
8-Pin μMAX (derate 4.5mW/°C above +70°C) ..............362mW
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 = +12V (MAX16801: V IN must first be brought up to +23.6V for startup), 10nF bypass capacitors at IN and V CC , C NDRV = 0μF,
V UVLO = +1.4V, V DIM/FB = +1.0V, COMP = unconnected, V CS = 0V, T A = -40°C to +85°C, unless otherwise noted. Typical values are
at T A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
UNDERVOLTAGE LOCKOUT/STARTUP
Bootstrap UVLO Wake-Up Level
Bootstrap UVLO Shutdown Level
UVLO/EN Wake-Up Threshold
UVLO/EN Shutdown Threshold
UVLO/EN Input Current
V SUVR
V SUVF
V ULR2
V ULF2
I UVLO
V IN rising (MAX16801 only)
V IN falling (MAX16801 only)
UVLO/EN rising
UVLO/EN falling
T J = +125°C
19.68
9.05
1.188
1.168
21.6
9.74
1.28
1.23
25
23.60
10.43
1.371
1.291
V
V
V
V
nA
UVLO/EN Hysteresis
50
mV
IN Supply Current In
Undervoltage Lockout
I START
V IN = +19V, for MAX16801 only when in
bootstrap UVLO
45
90
μA
IN Voltage Range
UVLO/EN Propagation Delay
Bootstrap UVLO Propagation
Delay
V IN
t EXTR
t EXTF
t BUVR
t BUVF
UVLO/EN steps up from +1.1V to +1.4V
UVLO/EN steps down from +1.4V to +1.1V
V IN steps up from +9V to +24V
V IN steps down from +24V to +9V
10.8
12
1.8
5
1
24
V
μs
μs
INTERNAL SUPPLY
V CC Regulator Set Point
IN Supply Current After Startup
Shutdown Supply Current
V CCSP
I IN
V IN = +10.8V to +24V, sinking 1μA to 20mA
from V CC
V IN = +24V
UVLO/EN = low
7
1.4
10.5
2.5
90
V
mA
μA
GATE DRIVER
Driver Output Impedance
Driver Peak Sink Current
Driver Peak Source Current
R ON(LOW) Measured at NDRV sinking, 100mA
R ON(HIGH) Measured at NDRV sourcing, 20mA
2
4
1
0.65
4
12
?
A
A
PWM COMPARATOR
Comparator Offset Voltage
CS Input Bias Current
Comparator Propagation Delay
VO PWM
I CS
t PWM
V COMP - V CS
V CS = 0V
V CS = +0.1V
1.15
-2
1.38
60
1.70
+2
V
μA
ns
Minimum On-Time
t ON(MIN)
150
ns
2
_______________________________________________________________________________________
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