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Integrated High-Voltage LED Driver
with Analog and PWM Dimming Control
ABSOLUTE MAXIMUM RATINGS
(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 (T A = +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
*As per JEDEC51 standard (multilayer board).
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 L_REG = 3.3μF, C H_REG = 1μF, C REF = 47nF, V TGRM = 0V, R SRC = 0.2 Ω , T A = T J = -40°C to +125°C, unless oth-
erwise noted. Typical values are at T A = +25°C.)
PARAMETER
Input Voltage Range
SYMBOL
V IN
CONDITIONS
MIN
5.5
TYP
MAX
76.0
UNITS
V
Quiescent Supply
Shutdown Supply Current
Internal MOSFET On-Resistance
Output Current Accuracy
I Q
I SHDN
R DSON
I LED
V TGRM = 1V, V DIM = 0V
V EN ≤ 300mV
I LX = 1A, V IN > 10V, V GT = V DRV = 5V
I LED = 350mA, R CS = 1 Ω
0.3
-5
20
0.2
2.5
45
0.4
+5
mA
μA
Ω
%
Peak Switch Current Limit
I LXLIM
2.6
3.1
3.6
A
Hiccup Switch Current
6
A
Switch Leakage Current
I LXLEAK
V EN = 0V, V LX = 76V, V GT = 0V
1
10
μA
UNDERVOLTAGE LOCKOUT
IN Undervoltage Lockout
UVLO
V IN rising
4.6
4.9
5.3
V
UVLO Hysteresis
100
mV
EN Threshold Voltage
V EN_THUP
V EN rising
1.2
1.38
1.6
V
EN Hysteresis
REFERENCE (REF) AND LOW-SIDE LINEAR REGULATOR (L_REG)
100
mV
Startup Response Time
t POR
V IN or V EN rising
50
μs
Reference Voltage
Reference Soft-Start Charging
Current
L_REG Supply Voltage
V REF
I REF_SLEW
I REF = 10μA
V REF = 0V
V IN = 7.5V, I L_REG = 1mA
1.190
25
4.9
1.238
40
5.2
1.288
60
5.5
V
μA
V
L_REG Load Regulation
L_REG Dropout Voltage
I L_REG = 20mA
I L_REG = 25mA
400
20
Ω
mV
2
_______________________________________________________________________________________
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