EL5525IRE-T7 Intersil, EL5525IRE-T7 Datasheet - Page 9

• Manufacturer Part Number: EL5525IRE-T7
• Description: IC VREF GEN 18CH TFTLCD 38HTSSOP
• Manufacturer: Intersil

Specifications of EL5525IRE-T7

• Applications: Converter, TFT, LCD
• Voltage - Input: 4.5 ~ 16.5 V
• Number Of Outputs: 18
• Voltage - Output: 0.5 ~ 14.95 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 38-TSSOP Exposed Pad, 38-eTSSOP, 38-HTSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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.
THERMAL SHUTDOWN
The EL5525 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.
Application Drawing
MICROCONTROLLER
CONTROLLER
TIMING
LCD
LOAD
DMAX
s to avoid the device overheat. The
HORIZONTAL RATE
equations equal to each other, we
9
+10V
HIGH REFERENCE
VOLTAGE
+12V
+5V
0.1µF
0.1µF
0.1µF
+1V
0.1µF
0.1µF
EL5525
5V
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 EL5525. The traces from the
two ground pins to the ground plane must be very short. The
thermal pad of the EL5525 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
REFH
VS
VSD
SDI
SCK
ENA
SDO
OSC
CAP
OSC_SET
REFL
GND
REFH
REFL
EL5525
, V
pins.
OUTQ
OUTB
OUTC
OUTD
OUTE
OUTR
OUTA
OUTF
REFL
, and CAP pins. A 4.7µF local bypass
LCD PANEL
(SOURCE)
COLUMN
DRIVER
S
, V
September 21, 2010
REFH
FN7393.2
, and
S
,