MAX4990E Maxim Integrated Products, MAX4990E Datasheet - Page 11

• Manufacturer Part Number: MAX4990E
• Description: High-Voltage +-15kV ESD-Protected Electroluminescent Lamp Driver
• Manufacturer: Maxim Integrated Products

Table 1. Inductor Vendors
The peak-to-peak voltage is adjusted by connecting a
resistor from the SLEW input to GND together with a
resistor from the DIM input to GND. The equation relating
the peak-to-peak voltage to the resistors is the following:
Figure 1a. Human Body ESD Test Model
Figure 1b. Human Body Current Waveform
VOLTAGE
INDUCTOR VALUE (µH)
SOURCE
AMPS
HIGH-
DC
I
P
36.8%
100%
90%
10%
CHARGE-CURRENT-
0
LIMIT RESISTOR
0
220
330
470
220
330
470
1MΩ
t
RL
R
C
100pF
V
______________________________________________________________________________________
P-P
C s
=
CURRENT WAVEFORM
200
RESISTANCE
DISCHARGE
STORAGE
CAPACITOR
TIME
1500Ω
R
t
×
D
DL
R
I r
R
SLEW
DIM
High-Voltage, ±15kV ESD-Protected
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
VENDOR
Coilcraft
Coilcraft
Coilcraft
Coilcraft
Coilcraft
TOKO
Electroluminescent Lamp Driver
DEVICE
UNDER
TEST
The MAX4990E provides a slow turn-on/-off feature by
connecting a resistor in parallel with a capacitor con-
nected from the DIM input to GND. The reference cur-
rent I
When EN is driven to GND, I
age across the capacitor and resistor decay with a time
constant of RC that provides a slow turn off of the EL
Figure 1c. IEC 61000-4-2 ESD Test Model
Figure 1d. IEC 61000-4-2 ESD Generator Current Waveform
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t
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VOLTAGE
r
SOURCE
HIGH-
= 0.7ns TO 1ns
B
DC
WEBSITE
is used to charge the resistor and capacitor.
CHARGE-CURRENT-
100%
LIMIT RESISTOR
90%
10%
50MΩ TO 100MΩ
I
R
C
150pF
C s
30ns
R
RESISTANCE
DISCHARGE
STORAGE
CAPACITOR
DIM
330Ω
R
60ns
B
D
Capacitor Selection
is removed, and the volt-
D312C 1001BS-221M
Resistor and C
DO1608C-334ML
DO1608C-474ML
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LPS4018-224ML
LPS4018-334ML
LPS4018-474ML
PART
DEVICE
UNDER
TEST
t
DIM
11