MAX4990EVKIT+ Maxim Integrated Products, MAX4990EVKIT+ Datasheet - Page 4

• Manufacturer Part Number: MAX4990EVKIT+
• Description: KIT EVAL FOR MAX4990
• Manufacturer: Maxim Integrated Products

Specifications of MAX4990EVKIT+

• Main Purpose: Lighting, Electroluminescent
• Utilized Ic / Part: MAX4990
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Subject to the constraint that R
gradual turn-on/turn-off time is set by R
(see Table 4) by the equations:
MAX4990 Evaluation Kit
Table 4. Soft-Start Configuration
CW = Clockwise. Approximate trimmer values provided for initial guidance only.
Table 5. Lamp Output Frequency When JU4 = Open (Internal f
CW = Clockwise. Approximate trimmer values provided for initial guidance only.
4
_______________________________________________________________________________________
C
C1 = 1.0
DIM
C2 = 1000
C2 = 560
C
EL
(µF)
(pF)
t
t
OFF
ON
=
=
2 6
1 2
.
.
JU3 SHUNT
POSITION
JU1 SHUNT POSITION
×
×
Soft-Start (R
R
R
2-3
1-2
DIM
DIM
×
×
DIM
1-2
2-3
1-2
2-3
C
C
DIM
DIM
/R
SLEW
DIM
VR2 TRIMMER
DIM
10% CW
18% CW
25% CW
35% CW
50% CW
70% CW
≤ 1.3, the
7% CW
and C
, C
—
DIM
VR1 TRIMMER
DIM
25% CW
50% CW
25% CW
50% CW
)
—
—
Lamp output frequency can be set by an external
capacitor, C
VR2 = 0.152
VR2 = 0.211
VR2 = 0.374
VR2 = 0.496
VR2 = 0.700
VR2 = 1.000
VR2 = 1.398
R4 = 0.374
R
(MΩ)
DIM
Lamp Output Frequency (R
EL
VR1 + R1 = 0.560
VR1 + R1 = 0.997
VR1 + R1 = 0.560
VR1 + R1 = 0.997
(see Table 5):
R2 = 0.374
R2 = 0.374
f
R
EL
(MΩ)
SLEW
=
EL
R
)
SLEW
0.972
0.395
0.549
0.972
1.290
1.820
2.600
3.635
t
(S)
ON
0 0817
.
×
C
EL
f
EL
SLEW
390
260
150
218
146
82
0.449
0.182
0.253
0.449
0.595
0.840
1.200
1.678
(Hz)
t
OFF
(S)
, C
EL
)