Rainbow Electronics MAX14514 - Manual (Page 4)

MAX14514
Dual Electroluminescent Lamp Driver
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ELECTRICAL CHARACTERISTICS (continued)
(V DD = +2.7V to +5.5V, C LAMP_TOTAL = 10nF, C CS = 3.3nF, L X = 220µH (I SAT = 170mA, R S = 5.5 Ω), T
A = -40°C to +85°C, unless
otherwise noted. Typical values are at V DD = +3.0V, T A = +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
BOOST CONVERTER
V DIM_ = +0.5V 52 65 81
V DIM_ = +1V 105 130 155 Output Regulation Voltage V CS V DD = +3V
V DIM_ = +1.3V 125 150 175
V
Boost Switching Frequency f SW C SW = 96pF, R SLEW = 375k Ω 80 100 120 kHz
Switch On-Resistance R LX I SINK = 25mA, V DD = +3V 20 Ω
LX Leakage Current I
LX
V
LX
= +150V -1 +1 µA
CS Input Current I CS N o l oad , V C S = + 150V , V E N = 0, V D IM _ = 0 50 µA
CONTROL INPUT (SW)
Input-Voltage High Threshold V IH_CSW R SLEW = 375k Ω 0.9 0.98 1.06 V
Input-Voltage Low Threshold V IL_CSW R SLEW = 375k Ω 0.43 0.49 0.55 V
Input Low Current I
IL_CSW
R SLEW = 375k Ω, V
CS = +78V, C EL = V DD,
V DIM_ = V DD
43 79 µA
Input High Current I IH_CSW
R SLEW = 375k Ω, V
CS = +78V, C EL = V DD,
V DIM_ = V DD
5 7.5 µA
CONTROL INPUT (EL)
Input-Voltage High Threshold V
IH_CEL
R
SLEW
= 375k Ω 1.08 1.32 V
Input-Voltage Low Threshold V IL_CEL R SLEW = 375k Ω 0.22 0.39 V
Input Low Current I IL_CEL R SLEW = 375k Ω 1.3 1.88 µA
Input High Current I IH_CEL R SLEW = 375k Ω 1.3 1.88 µA
CONTROL INPUT (CAP)
CAP Switching Frequency f CAP R SLEW = 375k Ω, C
CAP = 1.25nF 180 300 410 Hz
Slow Turn-On Time t SLOW_ON R SLEW = 375k Ω, C
CAP = 1.25nF 0.3 s
Fast Turn-On CAP Threshold V FAST_CAP R SLEW = 375k Ω V D D - 0.35 V
Nonfast Turn-On CAP Threshold
V NON-
FAST_CAP
R SLEW = 375k Ω 1.4 V
Normal operation 0.3 1 µA
Input Leakage Current I IH_CAP
CAP = V DD, R SLEW =
375k Ω
Shutdown mode -100 100 nA
CONTROL INPUT (SLEW)
Force Voltage V FORCE R SLEW = 375k Ω 0.9 0.98 1.05 V
High-Voltage Output Slew Rate R SLEW = 375k Ω 32 V/100µs
CONTROL INPUTS (DIM1, DIM2)
Input High Voltage V IH_DIM__ Max output voltage 1.3 V
Input Low Voltage V IL_DIM__ Min output voltage 0.15 V
Input Low Current I IL_DIM__ V DIM_ = 0, R SLEW = 375k Ω 2.2 2.6 3.0 µA
Input High Current I
IH_DIM__
V
DIM_
= V
DD
-1 +1 µA
PWM Frequency Range 0.2 to 1 MHz
Low-Peak Detector Threshold V LPD 0.13 0.35 V
Low-Peak Detector Hysteresis V LPD_HYST 100 mV