ISL97702_06 Datasheet, PDF (1/5 Pages) Intersil Corporation – OLED Driver Demo Board

Using the ISL97702 OLED Driver Demo Board
®
Technical Brief
June 12, 2006
TB455.0
Introduction
The complete schematic of the ISL97702 OLED driver Demo
Board is shown in Figure 1. In order to use the demo board
properly, it is necessary to understand the purpose and
function of the on board jumpers (JP1, JP2, JP3).
In the demo board, jumper JP1 is used to enable ISL97702
through the NEN pin. The part is enabled when the NEN pin
is connected to GND through JP1.
JP2 is used for the selection of the output voltage feedback
network. The pre-installed values of resistors R1, R5 and R6
in the demo board schematic set the selectable output
voltages to 18.3V and 12.6V. Either of these two output
voltages can be selected by shunting JP2 to either VDD or
GND.
JP3 is used to select either the internal ISL97702 switching
frequency, or to synchronize to an external frequency. When
JP3 is shunted to VDD, the ISL97702 boost converter
switching frequency is internally set to around 1MHz. When
JP3 is opened, the NSYNC pin of ISL97702 will connect
through the J4 pin of the demo board.
To test the demo board, the following procedure must be
followed:
Shunt JP1 to GND. To enable ISL97702 boost converter.
Connect the load. The load is connected through VOUT
and GND_OUT terminals.
Apply a DC power voltage source. The DC power voltage
source is applied through both VDD_IN and GND_IN
terminals. For ISL97702, the allowed input voltage range is
from 2.3 to 5.5V. Due to the boost function, the input DC
voltage must be lower than the output voltage in order to
regulate the output voltage.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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