EL5000AERZ-T13 Intersil, EL5000AERZ-T13 Datasheet - Page 11

• Manufacturer Part Number: EL5000AERZ-T13
• Description: IC DRIVER TFT-LCD HV 16TSSOP
• Manufacturer: Intersil

Specifications of EL5000AERZ-T13

• Display Type: LCD
• Current - Supply: 1.1mA
• Voltage - Supply: 3.3V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Configuration: -
• Interface: -
• Digits Or Characters: -

Power Dissipation
The dissipated power in R
follows:
We assume that:
• V
• V
• H sync timing frequency = 60kHz
• C
The value of V
that case is 23V for the positive discharge and 3.3V for the
negative discharge.
The voltage change across the capacitor is therefore 23V;
see Figure 25.
The stored energy in the capacitor is shown in Equation 1:
The energy, which is stored in the capacitor, will be
dissipated on the resistor; see Figure 26. The switch will
close 2 x 60,000 in every second.
The process will be repeated 2 times for the CKV and the
CKVB. In 120,000 cycles per second, the power dissipation
in R
1/2
2
×
1.32
ON
OFF
×
L
3
V
= 5nF
and R
2
= 40V
×
C
= -20V
10
=
-6
6
1/2
becomes Equation 2:
×
L
60
×
(the left over voltage) in the capacitors in
23
×
10
2
×
3
5
=
×
160mW
3
10
and R
-9
11
=
132μJ
6
could be calculated as
(EQ. 1)
(EQ. 2)
EL5000A
For different values of V
frequency, the worst case dissipation can be calculated in a
similar matter. The value of the R
such that the capacitor C
in one half period of the H sync timing.
Figures 13 and 14 show the total power dissipation over a
range of possible voltages, operating frequencies and loads.
Care should be taken to prevent the power from exceeding
the maximum rating of the package, as shown in Figure 13.
+40V
-20V
ON
0 V
L
FIGURE 25.
FIGURE 26.
is discharged via R
23V
23V
, V
OFF
3
, C
+17 V
+3.3 V
and R
L
and H sync timing
6
must be selected
3
or R
February 20, 2008
6
resistor
FN6167.2