Overview
The NCS5651MNTXG, produced by onsemi, is a high-efficiency, Class A/B, low-distortion power line driver. It is specifically designed to accept signals from a Power Line Carrier (PLC) modem. The device features two operational amplifiers: one for the output stage and another for small-signal applications. The output amplifier can drive up to 2 A peak into an isolation transformer or simple coil coupling to the mains, ensuring a high signal-to-noise ratio (SNR) with an output voltage swing within 1 V or less of either rail at 1.5 A output current.
The NCS5651MNTXG includes several diagnostic features such as current limit, thermal warning, and thermal shutdown flags, which enhance its reliability and safety. It operates within a power supply voltage range of 6-12 V and can be shut down to a high-impedance state. The device is packaged in a 20-lead QFN package with an exposed thermal pad for improved thermal reliability.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Junction Temperature (TJ) | -40 | 160 | °C | |
| Storage Temperature (TSTG) | -65 | 165 | °C | |
| Supply Voltage (VS) | 6 | 12 | V | |
| Logic Supply Voltage (VCC) | 3.0 | 5.0 | V | |
| Output Current (IOUT) | 2 A | |||
| Input Offset Voltage (VOS,A) | ±3 | ±10 | mV | |
| Open Loop Gain (AOL,B) | 80 | 100 | dB | |
| Gain Bandwidth Product (GBWB) | 60 | MHz | ||
| Total Harmonic Distortion + Noise (THD+NB) | 0.015% | 0.023% |
Key Features
- Rail-to-Rail: Drop of Only ±1 V with IOUT = 1.5 A
- VBB Supply Voltage: 6-12 V
- Flexible 4th-Order Filtering
- Current-Limit Set with One Resistor
- Diagnostic Flags Level Shifted to VCC to Simplify Interface with External MCU
- Thermal Warning Flag with Flexible Threshold Setting
- Thermal Error Flag and Shutdown
- Overcurrent Flag
- Enable/Shutdown Control
- Extended Junction Temperature Range: -40°C to +125°C
- Small Package: 20-pin 4 × 4 × 1 mm3 NQFP with Exposed Thermal Pad
- Optimized for Operation in the CENELEC A to D Frequency Band
- Pb-Free Device
Applications
- Power Line Communication Driver in AMM and AMR Metering Systems
- Valve, Actuator, and Motor Driver
- Audio Applications
Q & A
- What is the primary function of the NCS5651MNTXG?
The NCS5651MNTXG is a high-efficiency, Class A/B, low-distortion power line driver optimized for accepting signals from a Power Line Carrier (PLC) modem.
- What is the maximum output current of the NCS5651MNTXG?
The device can drive up to 2 A peak into an isolation transformer or simple coil coupling to the mains.
- How is the current limit set on the NCS5651MNTXG?
The current limit can be programmed by adding a resistor (RLIM) from pin 15 to VEE, using the equation ILIM = 1.215 / RLIM.
- What are the thermal protection features of the NCS5651MNTXG?
The device includes thermal warning and thermal shutdown flags. The thermal shutdown occurs at approximately 160°C, and the thermal warning can be set between 105°C to 145°C.
- What is the purpose of the exposed thermal pad on the NCS5651MNTXG?
The exposed thermal pad facilitates heat dissipation and enhances thermal reliability.
- What are the recommended operating conditions for the NCS5651MNTXG?
The device operates within an ambient temperature range of -40°C to +125°C and a supply voltage range of 6-12 V.
- How does the NCS5651MNTXG implement 4th-order filtering?
The device can implement a 4th-order filter using its two operational amplifiers and external passive components (resistors and capacitors), facilitated by the mid-supply virtual common at pin 2 (VCOM).
- What are the typical applications of the NCS5651MNTXG?
Typical applications include power line communication drivers in AMM and AMR metering systems, valve, actuator, and motor drivers, and audio applications.
- How is the device packaged?
The NCS5651MNTXG is packaged in a 20-lead QFN package with an exposed thermal pad.
- Is the NCS5651MNTXG a Pb-Free device?
Yes, the NCS5651MNTXG is a Pb-Free device.
