Overview
The NCS29001DR2G is an integrated LED driver designed by onsemi for use in LCD display backlighting applications. This device utilizes a boost type converter to deliver constant current to a string of LEDs, making it highly efficient for various LCD screen sizes. It features high accuracy PWM dimming, a soft start function to control in-rush current, and multiple protection mechanisms including output overvoltage, open/short LED, and thermal overload protection. The NCS29001DR2G is packaged in a cost-effective SOIC-14 package and is Pb-free, adhering to environmental standards.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VIN (Input Voltage Range) | 8.5 | 12 | 18 | V | |
| Switching Frequency Range | 100 | 500 | kHz | ||
| PWM Dimming Frequency | 500 | Hz | |||
| Vref Voltage Accuracy | ±1% | % | |||
| Maximum Duty Cycle | 93 | 95 | % | ||
| Operating Ambient Temperature | -40 | 85 | °C | ||
| Storage Temperature | -65 | 150 | °C | ||
| Maximum Junction Temperature | 150 | °C | |||
| Thermal Shutdown Temperature | 140 | 150 | 160 | °C |
Key Features
- PWM controlled dimming up to 500 Hz
- Soft start function to limit in-rush current
- Open feedback protection, open LED protection, and short LED protection
- LED string cathode short to ground protection
- Output overvoltage protection
- Thermal overload protection
- Internal 10 V regulator for gate drive of external transistors
- Accurate 5 V reference voltage (Vref) up to 10 mA
- SOIC-14 package, Pb-free
Applications
- TFT-LCD TV panels
- LCD monitor panels
Q & A
- What is the input voltage range of the NCS29001DR2G? The input voltage range is from 8.5 V to 18 V.
- What is the maximum PWM dimming frequency supported by the NCS29001DR2G? The maximum PWM dimming frequency is 500 Hz.
- What type of converter does the NCS29001DR2G use? The NCS29001DR2G uses a boost type converter.
- What protection mechanisms are included in the NCS29001DR2G? The device includes output overvoltage protection, open/short LED protection, thermal overload protection, and LED string cathode short to ground protection.
- What is the typical accuracy of the Vref voltage? The Vref voltage accuracy is ±1%.
- What is the maximum duty cycle of the NCS29001DR2G? The maximum duty cycle is above 90%, typically 93% to 95%.
- What is the operating ambient temperature range of the NCS29001DR2G? The operating ambient temperature range is from -40°C to 85°C.
- What is the storage temperature range of the NCS29001DR2G? The storage temperature range is from -65°C to 150°C.
- How does the soft start function work in the NCS29001DR2G? The soft start function limits in-rush current during the power-up sequence to avoid current overshoot.
- What package type is the NCS29001DR2G available in? The NCS29001DR2G is available in a SOIC-14 package.
