Overview
The NCP3066DR2G is a monolithic switching regulator designed by onsemi to deliver constant current for powering high brightness LEDs. This device is highly versatile, allowing configurations in step-down (buck), step-up (boost), and voltage-inverting topologies with a minimal number of external components. It features an integrated 1.5 A switch and operates over a wide input voltage range from 3.0 V to 40 V, making it suitable for various lighting applications, including those using unregulated supplies such as rechargeable batteries.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3.0 to 40 | V |
| Switch Current | 1.5 | A |
| Feedback Voltage | 235 mV (nominal) | mV |
| Oscillator Frequency | 110 to 190 kHz | kHz |
| ON/OFF Pin Logic Levels | High: 2.2 V, Low: 0.8 V | V |
| Operating Junction Temperature Range | 0 to +85°C (NCP3066), -40 to +125°C (NCV3066) | °C |
| Maximum Junction Temperature | +150 | °C |
| Thermal Resistance (Junction-to-Air) | 180 °C/W (SOIC-8), 78 °C/W (DFN-8) | °C/W |
Key Features
- Integrated 1.5 A Darlington switch
- Wide input voltage range from 3.0 V to 40 V
- Low feedback voltage of 235 mV
- Cycle-by-cycle current limit protection
- No control loop compensation required
- Adjustable frequency of operation up to 250 kHz
- Analog and digital PWM dimming capability
- Internal thermal shutdown with hysteresis
- Logic level shutdown capability
Applications
- Automotive and marine lighting
- Constant current source for high brightness LED drivers
- Low voltage and landscape lighting
- General lighting applications using unregulated supplies such as rechargeable batteries
Q & A
- What is the input voltage range of the NCP3066DR2G?
The input voltage range is from 3.0 V to 40 V.
- What is the maximum switch current of the NCP3066DR2G?
The maximum switch current is 1.5 A.
- What is the feedback voltage of the NCP3066DR2G?
The feedback voltage is 235 mV (nominal).
- Does the NCP3066DR2G require control loop compensation?
No, it does not require control loop compensation.
- What are the operating junction temperature ranges for the NCP3066 and NCV3066?
The operating junction temperature range for the NCP3066 is 0 to +85°C, and for the NCV3066, it is -40 to +125°C.
- What is the maximum junction temperature for the NCP3066DR2G?
The maximum junction temperature is +150°C.
- Does the NCP3066DR2G support PWM dimming?
- What is the thermal resistance (junction-to-air) for the SOIC-8 and DFN-8 packages?
The thermal resistance is 180 °C/W for the SOIC-8 package and 78 °C/W for the DFN-8 package.
- What are some common applications of the NCP3066DR2G?
Common applications include automotive and marine lighting, constant current sources for high brightness LEDs, and low voltage and landscape lighting.
- How can the ON/OFF pin be used in the NCP3066DR2G?
The ON/OFF pin can be used for logic level shutdown or PWM dimming, and it should be pulled below 0.8 V to disable the device.
