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MAX16812 Datasheet(PDF) 2 Page - Maxim Integrated Products

Part No. MAX16812
Description  Integrated High-Voltage LED Driver with Analog and PWM Dimming Control
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX16812 Datasheet(HTML) 2 Page - Maxim Integrated Products

 
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Integrated High-Voltage LED Driver
with Analog and PWM Dimming Control
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN = VEN = 12V, CL_REG = 3.3µF, CH_REG = 1µF, CREF = 47nF, VTGRM = 0V, RSRC = 0.2Ω, TA = TJ = -40°C to +125°C, unless oth-
erwise noted. Typical values are at TA = +25°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.
(All voltages are referenced to AGND, unless otherwise noted.)
SGND ....................................................................-0.3V to +0.3V
IN, EN, LX, DIM ......................................................-0.3V to +80V
L_REG, GT, DRV ......................................................-0.3V to +6V
RT, REF, REFI, CS_OUT, FB, COMP, SRC,
SLP, TGRM, OV ....................................................-0.3V to +6V
LV, HV, CS-, CS+, DGT, DD, H_REG ....................-0.3V to +80V
CS+, DGT, H_REG to LV ........................................-0.3V to +12V
CS- to LV ...............................................................-0.3V to +0.3V
CS+ to CS- .............................................................-0.3V to +12V
DD to LV ....................................................................-1V to +80V
Maximum Current into Any Pin (except LX, SRC) ............±20mA
Maximum Current into LX and SRC.......................................+2A
Continuous Power Dissipation (TA = +70°C)
28-Pin TQFN 5mm x 5mm
(derate 34.65mW/°C* above +70°C) .........................2759mW
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
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage Range
VIN
5.5
76.0
V
Quiescent Supply
IQ
VTGRM = 1V, VDIM = 0V
0.3
2.5
mA
Shutdown Supply Current
ISHDN
VEN ≤ 300mV
20
45
µA
Internal MOSFET On-Resistance
RDSON
ILX = 1A, VIN > 10V, VGT = VDRV = 5V
0.2
0.4
Output Current Accuracy
ILED
ILED = 350mA, RCS = 1Ω
-5
+5
%
Peak Switch Current Limit
ILXLIM
2.6
3.1
3.6
A
Hiccup Switch Current
6A
Switch Leakage Current
ILXLEAK
VEN = 0V, VLX = 76V, VGT = 0V
1
10
µA
UNDERVOLTAGE LOCKOUT
IN Undervoltage Lockout
UVLO
VIN rising
4.6
4.9
5.3
V
UVLO Hysteresis
100
mV
EN Threshold Voltage
VEN_THUP
VEN rising
1.2
1.38
1.6
V
EN Hysteresis
100
mV
REFERENCE (REF) AND LOW-SIDE LINEAR REGULATOR (L_REG)
Startup Response Time
tPOR
VIN or VEN rising
50
µs
Reference Voltage
VREF
IREF = 10µA
1.190
1.238
1.288
V
Reference Soft-Start Charging
Current
IREF_SLEW
VREF = 0V
25
40
60
µA
L_REG Supply Voltage
VIN = 7.5V, IL_REG = 1mA
4.9
5.2
5.5
V
L_REG Load Regulation
IL_REG = 20mA
20
L_REG Dropout Voltage
IL_REG = 25mA
400
mV
*As per JEDEC51 standard (multilayer board).


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