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Part Number: LM3409
Description: The LM3409/09HV are P-channel MosFET (PFET) controllers for step-down (buck) current regulators. They offer wid...
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LM3409
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DataSheet
General Description
LM3409 General Description
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 | 216 Kbytes | ||
| AN-1148 (Chinese): Application Note 1148 Linear Regulators: Theory Of Operation and Compensation | 396 Kbytes | ||
| 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 |
If you have trouble printing or viewing PDF file(s), see Printing Problems. |
LM3409 Maximum Ratings
| 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 | |
LM3409 Connection Diagram
LM301
PDF/DataSheet Download
- Datasheet: LM301
- File Size: 521472 KB
- Manufacturer: STMICROELECTRONICS [STMicroelectronics]
- Click here to Download
- ·LM301A
- STMICROELECTRONICS [STMicroelectronics]
- SINGLE OPERATIONAL AMPLIFIER
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- ·LM301AD
- STMICROELECTRONICS [STMicroelectronics]
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- 132599 KB
- ·LM301AH
- NSC [National Semiconductor]
- Operational Amplifiers
- 521472 KB
- ·LM301AJ8
- LINER [Linear Technology]
- Operational Amplifiers
- 397624 KB
- ·LM301AN
- STMICROELECTRONICS [STMicroelectronics]
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- ·LM301AP
- TI [Texas Instruments]
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