Specifications
| Type | Description |
|---|---|
| Part Number | LM3414 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | WSON-8 3.00 mm x 3.00 mm; SOIC-8 3.90 mm x 4.89 mm |
| LED power support | up to 60 W; thermal derating applies according to actual operation conditions |
| Output LED current capability | up to 1 A average LED current |
| LED current accuracy | ±3% average LED current regulation |
| Efficiency | up to 96% typical LED driver operation |
| External current sense resistor | not required; integrated current sensing element |
| Adjustable LED current range | 350 mA to 1000 mA; set by RIADJ resistor |
| PWM dimming minimum pulse width | <10 us for high contrast ratio dimming |
| Input voltage range, LM3414 | 4.5 V to 42 V recommended operating range |
| Input voltage range, LM3414HV | 4.5 V to 65 V recommended operating range |
| Switching frequency range | 250 kHz to 1000 kHz; adjustable by RFS resistor |
| Integrated power switch | low-side N-channel MOSFET internal main switch |
| Analog dimming support | supported via IADJ pin and external resistor to ground |
| Thermal fold-back support | supported via IADJ pin function |
| Thermal shutdown protection | included device protection feature |
| Dimming resolution support | 240 Hz, 256-step general lighting dimming requirement |
| VIN absolute maximum, LM3414 | -0.3 V to 42 V, VIN to GND |
| VIN absolute maximum, LM3414HV | -0.3 V to 65 V, VIN to GND |
| VIN transient absolute maximum, LM3414 | 45 V, VIN to GND, 500 ms transient |
| VIN transient absolute maximum, LM3414HV | 67 V, VIN to GND, 500 ms transient |
| LX absolute maximum, LM3414 | -0.3 V to 42 V, LX to PGND |
| LX absolute maximum, LM3414HV | -0.3 V to 65 V, LX to PGND |
| LX transient absolute maximum, LM3414 | -3 V to 45 V; -3 V for 2 ns, 45 V for 500 ms |
| LX transient absolute maximum, LM3414HV | -3 V to 67 V; -3 V for 2 ns, 67 V for 500 ms |
| FS and IADJ absolute maximum | -0.3 V to 5 V, FS and IADJ to GND |
| DIM absolute maximum | -0.3 V to 6 V, DIM to GND |
| Storage temperature | -65 °C to 125 °C absolute maximum rating |
| ESD rating HBM | ±2000 V, WSON and SOIC packages, ANSI/ESDA/JEDEC JS-001 |
| ESD rating CDM | ±750 V, WSON and SOIC packages, JEDEC JESD22-C101 |
| Recommended junction temperature | -40 °C to 125 °C operating free-air temperature range unless otherwise noted |
| Thermal resistance RthetaJA | 47.7 °C/W WSON; 50.5 °C/W SOIC-8 junction-to-ambient |
| Thermal resistance RthetaJC(top) | 43.1 °C/W WSON; 55.7 °C/W SOIC-8 junction-to-case top |
| Thermal resistance RthetaJB | 22.3 °C/W WSON; 28.6 °C/W SOIC-8 junction-to-board |
| Operating current, LM3414 | 2.2 mA min, 3.2 mA typ, 3.5 mA max; 4.5 V <= VIN <= 42 V, RIADJ=3.125 kOhm, VDIM=High |
| Standby current, LM3414 | 0.8 mA min, 1.15 mA typ, 1.4 mA max; 4.5 V <= VIN <= 42 V, RIADJ=3.125 kOhm, VDIM=Low |
| LX pin off current, LM3414 | 6 uA typ; main switch off, VLX=VIN=42 V |
| Operating current, LM3414HV | 2.2 mA min, 3.3 mA typ, 3.6 mA max; 4.5 V <= VIN <= 65 V, RIADJ=3.125 kOhm, VDIM=High |
| Standby current, LM3414HV | 0.8 mA min, 1.2 mA typ, 1.45 mA max; 4.5 V <= VIN <= 65 V, RIADJ=3.125 kOhm, VDIM=Low |
| LX pin off current, LM3414HV | 6.5 uA typ; main switch off, VLX=VIN=65 V |
| Average LED current | 0.97 A min, 1 A typ, 1.03 A max; RIADJ=3.125 kOhm, TA=25 °C |
| Average LED current over temperature | 0.95 A min, 1 A typ, 1.05 A max; RIADJ=3.125 kOhm, TA=-40 °C to 125 °C |
| VCC UVLO threshold | 3.6 V min, 3.75 V typ, 3.9 V max; VCC decreasing, TA=25 °C |
| VCC UVLO hysteresis | 300 mV typ |
| IADJ pin voltage | 1.23 V min, 1.255 V typ, 1.280 V max; VIN=24 V unless otherwise indicated |
| DIM pin threshold | 1 V min, 1.2 V max; VDIM increasing |
| DIM pin hysteresis | 100 mV typ |
| Switching frequency | 250 kHz min, 500 kHz typ, 1000 kHz max; VIN=24 V unless otherwise indicated |
| Switching frequency tolerance | 420 kHz min, 500 kHz typ, 580 kHz max; RFS=40 kOhm |
| Minimum on-time | 400 ns typ main switch timing |
| VCC regulator output voltage | 4.7 V min, 5.4 V typ, 6 V max; CVCC=1 uF, no load to IVCC=2 mA |
| VCC regulator output voltage at low input | 3.8 V min, 4.2 V typ; VIN=4.5 V, 2 mA load |
| Main switch on resistance | 1.8 Ohm typ across LX and GND when main switch is on |
| Thermal shutdown temperature | 170 °C typ, TJ rising |
| Thermal shutdown hysteresis | 10 °C typ, TJ falling |
| Datasheet Status | request_only |
Product Overview
The LM3414 integrates a low-side N-channel MOSFET as the internal main switch and uses an integrated current sensing element, so an external current sense resistor is not required. LED current is adjustable from 350 mA to 1000 mA using the RIADJ resistor, and switching frequency is adjustable from 250 kHz to 1000 kHz using the RFS resistor.
Key Features
- Supports LED power up to 60 W with thermal derating
- Average LED current capability up to 1 A
- ±3% average LED current regulation accuracy
- Up to 96% typical LED driver efficiency
- Integrated current sensing eliminates external sense resistor
- 350 mA to 1000 mA LED current adjustment
- PWM dimming supports less than 10 us pulses
- 4.5 V to 42 V LM3414 input range
- 250 kHz to 1000 kHz adjustable switching frequency
- Integrated low-side N-channel MOSFET main switch
- Analog dimming supported through the IADJ pin
- Thermal fold-back and thermal shutdown protection included
Typical Applications
- Constant-current LED buck drivers
- Up to 60 W LED power stages
- PWM dimmed LED lighting
- Analog dimmed LED lighting
- 240 Hz 256-step dimming systems
- Thermal fold-back LED designs
- 1 A average LED current circuits
- 4.5 V to 42 V LED inputs
Procurement Notes
When requesting a quote for LM3414, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What type of device is the LM3414?
The LM3414 is a Texas Instruments constant current buck LED driver in the Power_Management category. It integrates a low-side N-channel MOSFET main switch and uses an integrated current sensing element, so an external current sense resistor is not required.
What LED current can the LM3414 regulate?
The LM3414 supports average LED current up to 1 A. With RIADJ set to 3.125 kOhm, the average LED current is specified as 0.97 A minimum, 1 A typical, and 1.03 A maximum at TA=25 °C.
What input voltage range applies to the LM3414 and LM3414HV?
The LM3414 recommended operating input voltage range is 4.5 V to 42 V. The LM3414HV recommended operating input voltage range is 4.5 V to 65 V, according to the extracted datasheet facts.
What dimming functions are supported by the LM3414?
The LM3414 supports PWM dimming with less than 10 us minimum pulse width for high contrast ratio dimming. It also supports analog dimming through the IADJ pin with an external resistor to ground.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 7, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.