Overview
The NCL35076AADR2G is a DC-DC buck controller designed by onsemi for wide dimming range applications, particularly in LED lighting systems. It offers precise constant current control across the entire analog dimming range, leveraging onsemi's proprietary LED current calculation technique driven by zero input offset amplifiers. This controller supports multi-mode operation, transitioning between Continuous Conduction Mode (CCM) at heavy loads and Discontinuous Conduction Mode (DCM) at light loads, ensuring low LED current ripple with a small output capacitor.
Key Specifications
| Parameter | Value |
|---|---|
| Topology | Step-Down |
| VIN Min (V) | 10.7 |
| VIN Max (V) | < VIN |
| VO Max (V) | < VIN |
| IO Max (mA) | 500 |
| fSW Typ (kHz) | 1000 |
| Package Type | SOIC-8 |
| MSL Type | 1 |
| MSL Temp (°C) | 260 |
| Container Type | REEL |
| Container Qty. | 3000 |
Key Features
- Zero input offset amplifiers at the LED current calculator block and OTA
- CCM to DCM transition based on dimming conditions
- PWM dimming by PWM signal
- Standby mode operation
- Various protections including Auto Restart (AR), VDD Over Voltage Protection (OVP), Short LED Protection (SLP), Over Current Protection (OCP), and Thermal Shut Down (TSD)
- CCM operation at full load
- Configurable from 20mA to 150mA with external resistors, no microcontroller necessary
Applications
- LED Lighting
- Smart LED Driver
- LED Lamp
- LED Tube
- LED Street Light
- LED Ceiling Light
Q & A
- What is the primary function of the NCL35076AADR2G?
The NCL35076AADR2G is a DC-DC buck controller designed for LED lighting applications, providing precise constant current control and wide dimming range.
- What is the minimum input voltage for the NCL35076AADR2G?
The minimum input voltage is 10.7 V.
- What is the maximum output current of the NCL35076AADR2G?
The maximum output current is 500 mA.
- What package type is the NCL35076AADR2G available in?
The NCL35076AADR2G is available in an SOIC-8 package.
- Does the NCL35076AADR2G support PWM dimming?
Yes, it supports PWM dimming by PWM signal.
- What are the key protections included in the NCL35076AADR2G?
The key protections include Auto Restart (AR), VDD Over Voltage Protection (OVP), Short LED Protection (SLP), Over Current Protection (OCP), and Thermal Shut Down (TSD).
- Can the NCL35076AADR2G operate in standby mode?
Yes, it supports standby mode operation.
- How does the NCL35076AADR2G handle different load conditions?
The controller transitions between Continuous Conduction Mode (CCM) at heavy loads and Discontinuous Conduction Mode (DCM) at light loads.
- Is a microcontroller necessary for configuring the NCL35076AADR2G?
No, it can be configured from 20mA to 150mA using external resistors without a microcontroller.
- What are some common applications of the NCL35076AADR2G?
Common applications include LED lighting, smart LED drivers, LED lamps, LED tubes, LED street lights, and LED ceiling lights.
