EL5225IRZ Intersil, EL5225IRZ Datasheet - Page 10

• Manufacturer Part Number: EL5225IRZ
• Description: IC VOLT GEN 10CH TFT-LCD 24TSSOP
• Manufacturer: Intersil

Specifications of EL5225IRZ

• Applications: Converter, TFT, LCD
• Voltage - Input: 5 ~ 16.5 V
• Number Of Outputs: 10
• Voltage - Output: 0.5 ~ 14.95 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The maximum power dissipation actually produced by the IC
is the total quiescent supply current times the total power
supply voltage and plus the power in the IC due to the loads.
P
when sourcing, and:
when sinking.
Where:
• i = 1 to total 10
• V
• I
• V
• I
By setting the two P
can solve for the R
package power dissipation curves provide a convenient way
to see if the device will overheat.
P
DMAX
DMAX
S
LOAD
S
OUT
= Quiescent current
= Supply voltage
=
i = Output voltage of the i channel
=
i = Load current of the i channel
V
V
S
S
×
×
I
I
S
S
+
+
Σ V
Σ V
LOAD
DMAX
[
(
(
OUT
S
s to avoid the device overheat. The
- V
equations equal to each other, we
i
×
OUT
10
I
LOAD
i )
×
i
I
)
LOAD
i
]
EL5225
POWER SUPPLY BYPASSING AND PRINTED CIRCUIT
BOARD LAYOUT
Good printed circuit board layout is necessary for optimum
performance. A low impedance and clean analog ground
plane should be used for the EL5225. The traces from the
two ground pins to the ground plane must be very short.
Lead length should be as short as possible and all power
supply pins must be well bypassed. A 0.1µF ceramic
capacitor must be place very close to the V
V
capacitor should be placed to the V
pins.
APPLICATION USING THE EL5225
In the first application drawing, the schematic shows the
interconnect of a pair of EL5225 chips connected to give
10 gamma corrected voltages above the V
10 gamma corrected voltages below the V
REFL
, and CAP pins. A 4.7µF local bypass tantalum
S
, V
REFH
COM
COM
S
, V
, and V
REFH
voltage, and
voltage.
March 11, 2004
REFL
,
FN7356.0