Overview
The NCL30161MNTXG is a constant-current buck regulator designed by onsemi for driving high power LEDs. This device is ideal for industrial and general lighting applications, requiring minimal external components. It operates with an input voltage range of 6.3 V to 40 V and features a hysteretic control mechanism, which provides good power supply rejection and fast response during load transients and PWM dimming. The regulator is packaged in a DFN10 3 mm x 3 mm package, making it compact and efficient for various lighting solutions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN) | 6.3 | - | 40 | V |
| Under-Voltage Lockout Threshold (VIN Rising) | 5.5 | 6.0 | 6.5 | V |
| Under-Voltage Lockout Threshold (VIN Falling) | 5.2 | 5.6 | 6.3 | V |
| Quiescent Current into VIN (IQ_IN) | - | 1.5 | - | mA |
| Internal Regulator Output (VCC) | - | 5.0 | - | V |
| Switching Frequency Range (FSW) | - | - | 2400 | kHz |
| Maximum Duty Cycle (dmax) | - | - | 100 | % |
| Thermal Shutdown (TSD) | 160 | 165 | 180 | °C |
| Operating Junction Temperature Range (TJ) | -40 | - | 125 | °C |
| Storage Temperature Range (Tstg) | -55 | - | 125 | °C |
Key Features
- No control loop compensation required
- Adjustable LED current
- Single pin brightness and enable/disable control using PWM
- Supports all-ceramic output capacitors and capacitor-less outputs
- Thermal shutdown protection
- Capable of 100% duty cycle operation
- Short LED shutdown protection (latching)
- Pb-free device
- High switching frequency allows the use of smaller external components
Applications
- LED drivers
- Constant current sources
- General illumination
- Industrial lighting
Q & A
- What is the input voltage range of the NCL30161MNTXG?
The input voltage range is from 6.3 V to 40 V.
- What type of control mechanism does the NCL30161MNTXG use?
The device uses a hysteretic control mechanism.
- What is the typical application of the NCL30161MNTXG?
The device is typically used for LED drivers, constant current sources, general illumination, and industrial lighting.
- How is the LED current adjusted in the NCL30161MNTXG?
The LED current can be adjusted using a resistor connected from the CS pin to ground).
- What is the maximum operating temperature of the NCL30161MNTXG?
The maximum operating temperature is 125°C).
- Does the NCL30161MNTXG support PWM dimming?
Yes, it supports PWM dimming through the DIM/EN pin).
- What is the thermal shutdown temperature of the NCL30161MNTXG?
The thermal shutdown temperature range is from 160°C to 180°C).
- Is the NCL30161MNTXG a Pb-free device?
Yes, the NCL30161MNTXG is a Pb-free device).
- What is the recommended capacitor for the VCC pin?
A 2 μF ceramic capacitor is recommended for bypassing the VCC pin).
- How is the off-time setting resistor (ROT) used in the NCL30161MNTXG?
The ROT resistor programs the initial off-time duration of the MOSFET and is adjusted in subsequent switching cycles based on the sensed CS voltage).
