NCL30105: Flexible Dimmable Buck LED Driver Controller
The NCL30105 is a peak current controlled fixed off time buck controller designed for LED driver applications. It is optimized to operate in deep continuous conduction mode eliminating the need for output electrolytic capacitors. Featuring an adjustable off time generator, the controller can drive a MOSFET up to a switching frequency of 500 kHz. A dedicated dimming pin enables the use of a pulsewidth modulated logic signal to dim the LED directly. The soft-start pin creates a startup sequence that slowly ramps up the peak current and enables the adjustment of the peak current set point for analog dimming control. The device features robust protection features to detect switch overcurrent faults and to detect maximum on time events.
Features- Constant off time current mode control
- Adjustable off time (0.5 to 10 µs)
- Internal leading edge blanking
- ± 5% current sense accuracy
- Internal Startup Delay
- PWM or Analog Dimming Control
- Maximum on time protection
- Overcurrent protection
- Thermal Shutdown
- Soft Start
| Benefits- No loop compensation required
- Easily adjust operating frequency and output ripple
- Avoids false triggering during FET turn on
- Accurate LED current regulation
- Ensure stable operation during initial system turn on
- Flexible support for dimmable LED lighting applications
- Enhanced system robustness
- Enhanced fault handling
- Enhanced protection
|
Applications- LED Backlight Driver for large LCD panels
- LED Lightbar Driver
- LED Street Lighting
| End Products- LED Large Area Lights
- Architectural Lighting
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Data Sheets (1)
Evaluation Board Documents (4)
Package Drawings (1)
Evaluation/Development Tool Information
| Product | Status | Compliance | Short Description |
|---|
| NCL30105GEVB | Active | Pb-free | 350 mA Buck LED Driver Evaluation Board |
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCL30105DR2G | Active | Pb-free
Halide free | SOIC-8 | 751-07 | 1 | Tape and Reel | 2500 | $0.3 |
Specifications
| Product | Topology | VI Min (V) | VI Max (V) | VO Max (V) | IO Max (mA) | fSW Typ (kHz) |
|---|
| NCL30105DR2G | Step-Down | 11 | 22 | 150 | 1200 | 100 - 400 |
