EL5325IREZ Intersil, EL5325IREZ Datasheet - Page 9

• Manufacturer Part Number: EL5325IREZ
• Description: IC VOLT GEN 12CH TFT-LCD 28TSSOP
• Manufacturer: Intersil

Specifications of EL5325IREZ

• Applications: Converter, TFT, LCD
• Voltage - Input: 5 ~ 16.5 V
• Number Of Outputs: 12
• Voltage - Output: 0.5 ~ 14.95 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

when sourcing, and:
when sinking.
Where:
• i = 1 to total 12
• 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.
The EL5325 has an internal thermal shutdown circuitry that
prevents overheating of the part. When the junction
temperature goes up to about 150°C, the part will be
disabled. When the junction temperature drops down to
about 120°C, the part will be enabled. With this feature, any
short circuit at the outputs will enable the thermal shutdown
circuitry to disable the part.
P
DMAX
S
LOAD
S
OUT
= Quiescent current
= Supply voltage
i = Output voltage of the i channel
=
i = Load current of the i channel
V
S
×
I
S
+
Σ V
LOAD
DMAX
(
OUT
s to avoid the device overheat. The
equations equal to each other, we
i
×
I
LOAD
9
i
)
EL5325
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 EL5325. The traces from the
two ground pins to the ground plane must be very short. The
thermal pad of the EL5325 should be connected to the
analog ground plane. 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
tantalum capacitor should be placed to the V
V
APPLICATION USING THE EL5325
In the first application drawing, the schematic shows the
interconnect of a pair of EL5325 chips connected to give
12 gamma corrected voltages above the V
12 gamma corrected voltages below the V
REFH
REFL
, V
pins.
REFL
, and CAP pins. A 4.7µF local bypass
COM
COM
S
, V
voltage, and
voltage.
REFH
, and
S
,