Rainbow Electronics MAX17061 - Manual (Page 3)

MAX17061
8-String White LED Driver with
SMBus for LCD Panel Applications
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ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V IN = 12V, C CCV = 0.022µF, R CCV = 5.1k
Ω, V
ISET = V OSC = V DD = V CC , R FSET = 464k
Ω, V
PWMI = GND,
T A = 0°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
INPUT LEAKAGE
PWMI Leakage Current -0.3 +0.3 µA
ISET, FSET Leakage Current ISET , FSET to V CC +1 µA
OV Leakage Current -0.1 +0.1 µA
SDA, SCL Input Bias Current -1 +1 µA
SDA Output Low-Sink Current V SDA = 0.4V 4 mA
OSC Leakage Current -3 +3 µA
LED CURRENT
ISET = V CC 24.5 25.0 25.5
R ISET = 133k Ω 28.8 30.0 31.2
R ISET = 200k Ω 19.3 20.0 20.7
Full-Scale FB_ Output Current
R ISET = 266k Ω 14.4 15.0 15.6
mA
ISET High-Level Threshold
V CC -
0.4
V
ISET Output Voltage 1.166 1.236 1.306 V
C ur r ent Reg ul ati on Betw een S tr i ng s Full brightness -1.5 +1.5 %
I FB_ = 25mA 475 625 910
I FB_ = 30mA 575 750 1100
I FB_ = 20mA 380 500 740
Minimum FB_ Regulation Voltage
I FB_ = 15mA 285 375 560
mV
Maximum FB_ Ripple I FB_ = 20mA (C OUT = 1µF, V OSC = V CC ) (Note1) 120 200 mV P/P
FB_ On-Resistance V FB_ = 50mV (includes 10 Ω sense resistor) 17.5 28.4 Ω
V FB_ = 26V, T A = +25°C 1
FB_ Leakage Current
V FB_ = 45V, T A = +25°C 2.5 4
µA
FAULT PROTECTION
OV Threshold Voltage Rising edge, typical hysteresis = 60mV 1.166 1.236 1.306 V
FB_ Overvoltage Threshold V IN > 5.5V 5.2 5.6 6.0 V
FB_ Undervoltage Threshold 130 175 220 mV
OV Undervoltage Threshold
(Boost Global Fail)
48 84 120 mV
Thermal-Shutdown Threshold (Note 1) 160 °C
Over cur r ent FAU LT S hutd ow n Ti m er I PEAK > 3.3A at duty = 0% 88 128 168 µs
FB_ Overvoltage Fault Timer Full brightness 1.7 2 2.3 ms