Overview
The NCP3066MNTXG, produced by onsemi, is a monolithic switching regulator designed 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 a very low feedback voltage of 235 mV (nominal) to regulate the average current of the LED string. The NCP3066MNTXG operates over a wide input voltage range of up to 40 V, making it suitable for various lighting applications and unregulated supplies such as rechargeable batteries.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 0 to 42 | V |
| Switch Current | 1.5 | A |
| Feedback Voltage | 235 | mV |
| Oscillator Frequency | 110 to 190 | kHz |
| Operating Junction Temperature Range | 0 to +85 (NCP3066), -40 to +125 (NCV3066) | °C |
| Maximum Junction Temperature | +150 | °C |
| Thermal Resistance Junction-to-Air (SOIC-8) | 180 | °C/W |
| Thermal Resistance Junction-to-Air (DFN-8) | 78 | °C/W |
| Package Type | DFN-8 (Pb-Free), SOIC-8 (Pb-Free) |
Key Features
- Constant current output for high brightness LEDs
- Flexible topology: step-down, step-up, and voltage-inverting configurations
- Wide input voltage range up to 40 V
- Low feedback voltage of 235 mV
- High oscillator frequency range (110 kHz to 190 kHz)
- Integrated Darlington switch with low voltage drop (1.0 V to 1.3 V at 1.0 A)
- ON/OFF pin for device enable/disable with TTL logic compatibility
- Current limit protection via Ipk current comparator
- ESD protection and latch-up protection
Applications
The NCP3066MNTXG is designed for various lighting applications, including:
- High brightness LED drivers
- General lighting systems
- Automotive lighting (NCV3066 variant)
- Unregulated supply systems such as rechargeable batteries
- Digital dimming applications using PWM signals
Q & A
- What is the primary function of the NCP3066MNTXG?
The NCP3066MNTXG is a monolithic switching regulator designed to deliver constant current for powering high brightness LEDs.
- What are the possible configurations of the NCP3066MNTXG?
The device can be configured in step-down (buck), step-up (boost), and voltage-inverting topologies.
- What is the input voltage range of the NCP3066MNTXG?
The input voltage range is up to 40 V.
- What is the feedback voltage of the NCP3066MNTXG?
The feedback voltage is 235 mV (nominal).
- How does the ON/OFF pin function?
The ON/OFF pin allows the device to be enabled or disabled, with TTL logic compatibility. It should be pulled below 0.8 V to disable the device.
- What kind of protection does the NCP3066MNTXG have?
The device includes ESD protection, latch-up protection, and current limit protection via the Ipk current comparator.
- What are the thermal characteristics of the NCP3066MNTXG?
The thermal resistance junction-to-air is 180 °C/W for SOIC-8 and 78 °C/W for DFN-8 packages.
- Can the NCP3066MNTXG be used in automotive applications?
- How can the output current be adjusted in the NCP3066MNTXG?
The output current can be adjusted using a PWM signal on the ON/OFF pin for digital dimming.
- What is the maximum junction temperature of the NCP3066MNTXG?
The maximum junction temperature is +150 °C.
