LP5522TMEV National Semiconductor, LP5522TMEV Datasheet - Page 3

• Manufacturer Part Number: LP5522TMEV
• Description: BOARD EVAL LP5522 LED DRIVER
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP5522TMEV

• Current - Output / Channel: 20mA
• Outputs And Type: 1, Non-Isolated
• Features: USB Interface
• Voltage - Input: 2.7 ~ 5.5V
• Utilized Ic / Part: LP5522
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -

Evaluation Hardware
The evaluation board has the LP5522 circuit with the neces-
sary 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).
There is a jumper on board for selecting between power sup-
plies. When there is no external power supply connected the
jumper should be connected to VDD_USB. There is also
Figure 3. LP5522 Evaluation Board
3
jumper onboard for connecting Iset pin to external current se-
lecting resistor Riset or to VDD. Connecting Iset to VDD sets
the LED current to default 5 mA. The onboard current set re-
sistor is 24 kΩ. 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
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