Overview
The TDF8546TH/N1,518 is a cutting-edge audio power amplifier from NXP USA Inc., designed specifically for automotive applications. It belongs to a new generation of complementary quad Bridge-Tied Load (BTL) audio power amplifiers. This amplifier is distinguished by its best efficiency mode, which includes full I²C-bus controlled diagnostics and start-up diagnostics. It can operate at a battery voltage as low as 6 V, making it suitable for stop/start-car operations. The amplifier utilizes a switch technique to reduce switching distortion and power dissipation, ensuring high power output with excellent sound quality.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Supply Voltage (VP) | RL = 4 Ω | 6 | 14.4 | 18 | V |
| Operating Supply Voltage (VP) | RL = 2 Ω | 6 | 14.4 | 16 | V |
| Quiescent Current (Iq) | No load | - | 260 | 350 | mA |
| Off-State Current (Ioff) | VSTB = 0.4 V | - | 4 | 10 | μA |
| Output Power (Po) | RL = 4 Ω, VP = 14.4 V, THD = 0.5 % | 18 | 20 | - | W |
| Output Power (Po) | RL = 2 Ω, VP = 14.4 V, THD = 0.5 % | 29 | 32 | - | W |
Key Features
- I²C-bus controlled diagnostics, including start-up diagnostics.
- Best efficiency mode using a switch technique to reduce switching distortion and power dissipation.
- Complementary DMOS output stage in a Silicon-On-Insulator (SOI)-based BCD process for high power output and sound quality.
- Programmable gain (26 dB and 16 dB) independently for the front and rear channels.
- Independent selectable soft mute of front and rear channels.
- Programmable clip detect: 2 %, 5 %, or 10 %.
- Programmable thermal pre-warning.
- Line driver mode supports engine start at a battery voltage as low as 6 V.
- AC load (tweeter) detection with low and high current mode.
Applications
The TDF8546TH/N1,518 is primarily designed for automotive audio systems, particularly in vehicles with advanced audio requirements. It is suitable for use in car audio systems that need high power output, efficient operation, and robust diagnostics. The amplifier's ability to operate at low battery voltages makes it ideal for stop/start-car applications.
Q & A
- What is the TDF8546TH/N1,518 used for?
The TDF8546TH/N1,518 is used in automotive audio systems, providing high power output and advanced diagnostics. - What is the minimum operating supply voltage for the TDF8546TH/N1,518?
The minimum operating supply voltage is 6 V. - What is the maximum output power of the TDF8546TH/N1,518?
The maximum output power is up to 32 W per channel at 2 Ω load and 0.5 % THD. - Does the TDF8546TH/N1,518 support I²C-bus control?
Yes, it supports full I²C-bus controlled diagnostics and start-up diagnostics. - What is the quiescent current of the TDF8546TH/N1,518?
The quiescent current is typically 260 mA with no load. - Can the TDF8546TH/N1,518 operate in stop/start-car applications?
Yes, it can operate at battery voltages as low as 6 V, making it suitable for stop/start-car operations. - What are the programmable gain options for the TDF8546TH/N1,518?
The gain can be programmed to 26 dB and 16 dB, independently for the front and rear channels. - Does the TDF8546TH/N1,518 have thermal pre-warning capabilities?
Yes, it has programmable thermal pre-warning capabilities. - What is the package type of the TDF8546TH/N1,518?
The package type is 36-HSOP (Heat Sink Small Outline Package). - Is the TDF8546TH/N1,518 robust against latch-up?
Yes, the SOI-based BCD process ensures the amplifier is robust against latch-up.
