PinoutSpecificationsTopologyBuckInput Min Voltage6 VoltInput Max Voltage42, 75 VoltOutput Range6-42V, 6-75VOutput Current5000 mAEfficiency (peak)95 %Special FeaturesAnalog and PWM DimmingAdjustable OutputYesOn/Off PinYesSwitching Frequency1000 kHzAdj Switch FrequencyYesSync PinNoStep-DownYesStep-U...
LM3409: PinoutSpecificationsTopologyBuckInput Min Voltage6 VoltInput Max Voltage42, 75 VoltOutput Range6-42V, 6-75VOutput Current5000 mAEfficiency (peak)95 %Special FeaturesAnalog and PWM DimmingAdjustable ...
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Topology | Buck |
Input Min Voltage | 6 Volt |
Input Max Voltage | 42, 75 Volt |
Output Range | 6-42V, 6-75V |
Output Current | 5000 mA |
Efficiency (peak) | 95 % |
Special Features | Analog and PWM Dimming |
Adjustable Output | Yes |
On/Off Pin | Yes |
Switching Frequency | 1000 kHz |
Adj Switch Frequency | Yes |
Sync Pin | No |
Step-Down | Yes |
Step-Up | No |
Inverting | No |
Flyback | No |
RegType | LED Driver |
Temperature Min | -40 deg C |
Temperature Max | 125 deg C |
Automotive Selection Guide | No |
PowerWise | Yes |
View Using Catalog |
The LM3409/09HV are P-channel MosFET (PFET) controllers for step-down (buck) current regulators. They offer wide input voltage range, high-side differential current sense with low adjustable threshold voltage, fast output enable/disable function and a thermally enhanced eMSOP-10 package. These features combine to make the LM3409/09HV ideal for use as constant current sources for driving LEDs where forward currents up to 5A are easily achievable. The LM3409/09HV uses Constant Off-Time (COFT) control to regulate an accurate constant current without the need for external control loop compensation. Analog and PWM dimming are easy to implement and result in a highly linear dimming range with excellent achievable contrast ratios. Programmable UVLO, low-power shutdown, and thermal shutdown complete the feature set.
Application Notes
Title | Size in Kbytes | Date | |
AN-1954: Application Note 1954 LM3409 Demonstration Board | 607 Kbytes | 11-Jun-09 | Download |
AN-1953: Application Note 1953 LM3409HV Evaluation Board | 722 Kbytes | 11-Jun-09 | Download |
If you have trouble printing or viewing PDF file(s), see Printing Problems. |
More Application Notes
Title | Size in Kbytes | Date | |
AN-1590: Application Note 1590 LM3405 Demo Board | 475 Kbytes | 19-Mar-07 | Download |
AN-1644: Application Note 1644 Powering and Dimming High-Brightness LEDs with the LM3405 Constant-Current Buck Regulator | 174 Kbytes | 17-Jan-08 | Download |
AN-181: Application Note 181 3-Terminal Regulator Is Adjustable | 165 Kbytes | 1-May-04 | Download |
AN-1148: Application Note 1148 Linear Regulators: Theory Of Operation and Compensation | 200 Kbytes | 10-May-04 | Download |
AN-1148 (Japanese): Application Note 1148 Linear Regulators: Theory Of Operation and Compensation 640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> |
216 Kbytes | ||
AN-1148 (Chinese): Application Note 1148 Linear Regulators: Theory Of Operation and Compensation |
396 Kbytes | 640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> | |
AN-1529: Application Note 1529 LM3430 Evaluation Board | 2770 Kbytes | 21-Aug-07 | Download |
AN-1529 (Chinese): Application Note 1529 LM3430 Evaluation Board |
789 Kbytes | 640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> |
If you have trouble printing or viewing PDF file(s), see Printing Problems. |