Texas Instruments Programmable LED Driver Evaluation Module from the PowerWise® Family LP5522TMEV LP5522TMEV Datenbogen
Produktcode
LP5522TMEV
Evaluation Hardware
4
Evaluation Hardware
The evaluation board,
, has the LP5522 circuit with the necessary external components placed
around it. Test points for the circuit pins are on the board. USB interface card can supply the VDD voltage.
If external power supply is preferred it can be connected to the external power connector (X4).
If external power supply is preferred it can be connected to the external power connector (X4).
There is a jumper on board for selecting between power supplies. When there is no external power supply
connected the jumper should be connected to VDD_USB. There is also jumper onboard for connecting
Iset pin to external current selecting resistor Riset or to VDD. Connecting Iset to VDD sets the LED current
to default 5 mA. The onboard current set resistor is 24 k
connected the jumper should be connected to VDD_USB. There is also jumper onboard for connecting
Iset pin to external current selecting resistor Riset or to VDD. Connecting Iset to VDD sets the LED current
to default 5 mA. The onboard current set resistor is 24 k
Ω
. Connecting Iset pin to Riset results to 20 mA
LED current. Jumper J19 disconnects LED from GND. This allows easy LED current measuring.
Two PCB connectors on the bottom side of the board make the connection to the USB interface board
Figure 3. LP5522 Evaluation Board
3
SNVA243A – June 2007 – Revised April 2013
AN-1636 LP5522 Evaluation Kit
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