MAX16801A_10 Datasheet, PDF (2/16 Pages) Maxim Integrated Products – Offline and DC-DC PWM Controllers for High-Brightness LED Drivers

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)
Continuous Power Dissipation (T_A = +70°C)
8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW
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
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
V_SUVR
Bootstrap UVLO Shutdown Level
V_SUVF
UVLO/EN Wake-Up Threshold
V_ULR2
UVLO/EN Shutdown Threshold
V_ULF2
UVLO/EN Input Current
I_UVLO
UVLO/EN Hysteresis
V_IN rising (MAX16801 only)
V_IN falling (MAX16801 only)
UVLO/EN rising
UVLO/EN falling
T_J = +125°C
19.68 21.6 23.60
V
9.05 9.74 10.43
V
1.188 1.28 1.371
V
1.168 1.23 1.291
V
25
nA
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
INTERNAL SUPPLY
V_IN
10.8
24
V
t_EXTR UVLO/EN steps up from +1.1V to +1.4V
12
µs
t_EXTF UVLO/EN steps down from +1.4V to +1.1V
1.8
t_BUVR
t_BUVF
V_IN steps up from +9V to +24V
V_IN steps down from +24V to +9V
5
µs
1
V_CC Regulator Set Point
V_CCSP
V_IN = +10.8V to +24V, sinking 1µA to 20mA
from V_CC
7
10.5
V
IN Supply Current After Startup
I_IN
V_IN = +24V
1.4
2.5
mA
Shutdown Supply Current
UVLO/EN = low
90
µA
GATE DRIVER
Driver Output Impedance
R_ON(LOW) Measured at NDRV sinking, 100mA
R_ON(HIGH) Measured at NDRV sourcing, 20mA
2
4
Ω
4
12
Driver Peak Sink Current
1
A
Driver Peak Source Current
0.65
A
PWM COMPARATOR
Comparator Offset Voltage
VO_PWM V_COMP - V_CS
1.15 1.38 1.70
V
CS Input Bias Current
Comparator Propagation Delay
I_CS
t_PWM
V_CS = 0V
V_CS = +0.1V
-2
+2
µA
60
ns
Minimum On-Time
t_ON(MIN)
150
ns
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