MAX14514
Dual Electroluminescent Lamp Driver
4 _______________________________________________________________________________________
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
= 5.5Ω), 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 155Output 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
= 375kΩ 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 _
= 050µA
CONTROL INPUT (SW)
Input-Voltage High Threshold V
IH_CSW
R
SLEW
= 375kΩ 0.9 0.98 1.06 V
Input-Voltage Low Threshold V
IL_CSW
R
SLEW
= 375kΩ 0.43 0.49 0.55 V
Input Low Current I
IL_CSW
R
SLEW
= 375kΩ, V
CS
= +78V, C
EL
= V
DD,
V
DIM_
= V
DD
43 79 µA
Input High Current I
IH_CSW
R
SLEW
= 375kΩ, 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
= 375kΩ 1.08 1.32 V
Input-Voltage Low Threshold V
IL_CEL
R
SLEW
= 375kΩ 0.22 0.39 V
Input Low Current I
IL_CEL
R
SLEW
= 375kΩ 1.3 1.88 µA
Input High Current I
IH_CEL
R
SLEW
= 375kΩ 1.3 1.88 µA
CONTROL INPUT (CAP)
CAP Switching Frequency f
CAP
R
SLEW
= 375kΩ, C
CAP
= 1.25nF 180 300 410 Hz
Slow Turn-On Time t
SLOW_ON
R
SLEW
= 375kΩ, C
CAP
= 1.25nF 0.3 s
Fast Turn-On CAP Threshold V
FAST_CAP
R
SLEW
= 375kΩ V
D D
- 0.35 V
Nonfast Turn-On CAP Threshold
V
NON-
FAST_CAP
R
SLEW
= 375kΩ 1.4 V
Normal operation 0.3 1 µA
Input Leakage Current I
IH_CAP
CAP = V
DD,
R
SLEW
=
375kΩ
Shutdown mode -100 100 nA
CONTROL INPUT (SLEW)
Force Voltage V
FORCE
R
SLEW
= 375kΩ 0.9 0.98 1.05 V
High-Voltage Output Slew Rate R
SLEW
= 375kΩ 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
= 375kΩ 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
(15 Seiten)
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