I'm using an existing keypad with 8 LEDs that source power. I was hoping to use and LED driver of sorts, but all of the ones I find only refer to sinking power. Is it possible to use these drivers to source current and if so is there a way of understanding how to convert the sinking specifications to sourcing? The Vcc for my system is 3.3v and LEDs are 3.4V and 20mA

Was looking at this driver: http://www.ti.com/lit/ds/symlink/tlc5917.pdf

The LEDs on keypad are  http://www.mouser.com/catalog/specsheets/Lite-On-LTST-C150TBKT.pdf

The circuit is setup like

^{simulate this circuit – Schematic created using CircuitLab}

I'm using an existing keypad with 8 LEDs that source power. I was hoping to use and LED driver of sorts, but all of the ones I find only refer to sinking power. Is it possible to use these drivers to source current, and if so is there a way of understanding how to convert the sinking specifications to sourcing? The Vcc for my system is 3.3V and LEDs are 3.4V and 20mA

Was looking at this TI TLC5917 driver.

The LEDs on keypad are  Lite-On LTST-C150TBKT.

The circuit is setup like

^{simulate this circuit – Schematic created using CircuitLab}

I'm using an existing keypad with 8 LEDs that source power. I was hoping to use and LED driver of sorts, but all of the ones I find only refer to sinking power. Is it possible to use these drivers to source current and if so is there a way of understanding how to convert the sinking specifications to sourcing?

Was looking at this driver: http://www.ti.com/lit/ds/symlink/tlc5917.pdf

The LEDs on keypad are http://www.mouser.com/catalog/specsheets/Lite-On-LTST-C150TBKT.pdf

The circuit is setup like

^{simulate this circuit – Schematic created using CircuitLab}

I'm using an existing keypad with 8 LEDs that source power. I was hoping to use and LED driver of sorts, but all of the ones I find only refer to sinking power. Is it possible to use these drivers to source current and if so is there a way of understanding how to convert the sinking specifications to sourcing? The Vcc for my system is 3.3v and LEDs are 3.4V and 20mA

Was looking at this driver: http://www.ti.com/lit/ds/symlink/tlc5917.pdf

The LEDs on keypad are http://www.mouser.com/catalog/specsheets/Lite-On-LTST-C150TBKT.pdf

The circuit is setup like

^{simulate this circuit – Schematic created using CircuitLab}

I'm using an existing keypad with 8 LEDs that source power. I was hoping to use and LED driver of sorts, but all of the ones I find only refer to sinking power. Is it possible to use these drivers to source current and if so is there a way of understanding how to convert the sinking specifications to sourcing?

Was looking at this driver: http://www.ti.com/lit/ds/symlink/tlc5917.pdf

The LEDs on keypad are http://www.mouser.com/catalog/specsheets/Lite-On-LTST-C150TBKT.pdf

The circuit is setup like

^{simulate this circuit – Schematic created using CircuitLab}

I'm using an existing keypad with 8 LEDs that source power. I was hoping to use and LED driver of sorts, but all of the ones I find only refer to sinking power. Is it possible to use these drivers to source current and if so is there a way of understanding how to convert the sinking specifications to sourcing?

Was looking at this driver: http://www.ti.com/lit/ds/symlink/tlc5917.pdf

The LEDs on keypad are http://www.mouser.com/catalog/specsheets/Lite-On-LTST-C150TBKT.pdf

The circuit is setup like

^{simulate this circuit – Schematic created using CircuitLab}