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| MAX16819_15 Datasheet, PDF (2/9 Pages) Maxim Integrated Products – 2MHz High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming | |||
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MAX16819/MAX16820
2MHz High-Brightness LED Drivers with
High-Side Current Sense and 5000:1 Dimming
Absolute Maximum Ratings
IN, CSN, DIM to GND............................................-0.3V to +30V
VCC, DRV to GND ...................................................-0.3V to +6V
CSN to IN..............................................................-0.3V to +0.3V
Maximum Current into Any Pin
(except IN, VCC, and DRV)...........................................±20mA
Continuous Power Dissipation (TA = +70°C)
6-Pin TDFN (derate 18.17mW/°C* above +70°C)......1454mW
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
Pin-to-Pin ESD Ratings (HB Model)...................................2.5kV
*As per JEDEC51 Standard (Single-Layer Board).
Stresses beyond those listed under âAbsolute Maximum Ratingsâ 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
(VIN = 12V, VDIM = VIN, CVCC = 1µF, RSENSE = 0.5Ω, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
Input Voltage Range
VIN
4.5
Maximum Current Regulator
Switching Frequency
fSW
Ground Current
Supply Current
Undervoltage Lockout
Undervoltage Lockout Hysteresis
IGND
IIN
UVLO
DRV open
VDIM < 0.6V
VIN = VCSN = VDIM, VIN rising from 4V until
VDRV > VCC - 0.5V
VIN = VCSN = VDIM, VIN falling from 6V,
VDRV < 0.5V
SENSE COMPARATOR
(VIN - VCSN) rising from 0V until VDRV <
0.5V (MAX16820)
195
Sense Voltage Threshold High
VSNSHI
(VIN - VCSN) rising from 0V until VDRV <
0.5V (MAX16819)
213
Sense Voltage Threshold Low
VSNSLO
(VIN - VCSN) falling from 0.26V until VDRV >
(VCC - 0.5V) (MAX16820)
(VIN - VCSN) falling from 0.26V until VDRV >
(VCC - 0.5V) (MAX16819)
176
158
Propagation Delay to Output High
tDPDH
Falling edge of (VIN - VCSN) from 0.26V to
0V to DRV high, CDRV = 1nF
Propagation Delay to Output Low
tDPDL
Rising edge of (VIN - VCSN) from 0V to
0.26V to DRV low, CDRV = 1nF
Current-Sense Input Current
ICSN (VIN - VCSN) = 200mV
Current-Sense Threshold
Hysteresis
CSHYS
MAX16819
MAX16820
TYP MAX UNITS
28.0
V
2
MHz
1.5
mA
425
µA
4.7
5.0
V
4.5
0.5
V
210 225
mV
230 246
190 204
mV
170 182
82
ns
82
ns
1
µA
56
70
mV
17
35
mV
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