Datasheet Details
| Part number | LM3409Q |
|---|---|
| Manufacturer | National Semiconductor (now Texas Instruments) |
| File Size | 0.98 MB |
| Description | PFET Buck Controller |
| Datasheet |
 LM3409Q Datasheet
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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.
Key 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 LM3409/09Q/09HV/09QHV 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.
