Texas Instruments
LM3509
High Efficiency Boost for White LEDs and OLED Displays with Dual Current Sinks
The LM3509 is a current mode boost converter offering two separate outputs. The first output is a constant current sink for driving series white LEDs, while the second is configurable as a constant current sink or as a feedback pin to set a constant output voltage for OLED panels. It features 32 exponential dimming steps, I2C compatible brightness control, and can drive up to 10 LEDs at 30mA.
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Technical Specifications
Texas Instruments LM3509 technical specifications.
General
| Input Voltage Min | 2.7V |
| Input Voltage Max | 5.5V |
| Output Voltage Max | 21V |
| Output Current per string | 30mA |
| Switching Frequency | 1.27MHz |
| Efficiency | 90% |
| Number of Channels | 2channels |
| Dimming Steps | 32steps |
Compliance
| RoHS | Compliant |
| REACH | Compliant |
Datasheet
Texas Instruments LM3509 Datasheet
Download the complete datasheet for Texas Instruments LM3509 to view detailed technical specifications.
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