Overview
The TAS5261DKD, produced by Texas Instruments, is a high-performance, integrated mono digital amplifier power stage. This device is designed to drive 4-Ω to 8-Ω speakers with low harmonic distortion. It features complete protection circuitry, including short-circuit protection, overcurrent protection, undervoltage protection, and overtemperature warning and error detection. The TAS5261DKD supports Pulse-Width Modulation (PWM) frame rates of 192 kHz to 384 kHz and includes a power-on reset (POR) circuit to eliminate power-supply sequencing issues. The device is packaged in a thermally-enhanced 36-pin PSOP3 package and is EMI compliant when used with recommended system design.
Key Specifications
| Parameter | Condition | Min | Max | Unit | |
|---|---|---|---|---|---|
| Output Power (RL = 8 Ω, f = 1 kHz, THD = 0.09%) | 125 | W | |||
| Output Power (RL = 6 Ω, f = 1 kHz, THD = 10%) | 220 | W | |||
| Output Power (RL = 4 Ω, f = 1 kHz, THD = 10%) | 315 | W | |||
| PVDD_x Supply Voltage | 0 | 50 | 52.5 | V | |
| GVDD_x Gate-Drive Power Supply | 10.8 | 12 | 13.2 | V | |
| VDD Digital Regulator Supply Voltage | 10.8 | 12 | 13.2 | V | |
| Resistive Load Impedance (BTL) | 4 | 16 | Ω | ||
| PWM Frame Rate | 192 | 384 | kHz | ||
| Minimum Output Filter Inductance | 5 | 10 | µH | ||
| Maximum Operating Junction Temperature | 0 | 150 | °C |
Key Features
- Complete protection circuitry including short-circuit protection, overcurrent protection, undervoltage protection, and overtemperature warning and error detection.
- Supports Pulse-Width Modulation (PWM) frame rates of 192 kHz to 384 kHz.
- Power-on reset (POR) circuit to eliminate power-supply sequencing issues.
- Resistor-programmable current limit.
- Integrated self-protection circuit.
- Thermally-enhanced package (36-pin PSOP3).
- EMI compliant when used with recommended system design.
- Error reporting 3.3-V and 5-V compliant.
- PWM Activity Detector to monitor individual PWM inputs.
- 110-dB SNR (A-Weighted) with TAS5518 modulation input signal.
Applications
- AV Receivers
- DVD Receivers
- Mini/Micro Component Systems
- Home Theater Systems
Q & A
- What is the maximum output power of the TAS5261DKD into an 8-Ω load at 0.09% THD+N?
The maximum output power is 125 W into an 8-Ω load at 0.09% THD+N.
- What are the supported PWM frame rates for the TAS5261DKD?
The device supports PWM frame rates of 192 kHz to 384 kHz.
- What type of protection circuitry does the TAS5261DKD include?
The device includes short-circuit protection, overcurrent protection, undervoltage protection, and overtemperature warning and error detection.
- What is the purpose of the Power-On Reset (POR) circuit in the TAS5261DKD?
The POR circuit eliminates the need for power-supply sequencing, ensuring all circuits are fully operational when the GVDD_x and VDD supply voltages reach the specified levels.
- What is the recommended modulation index for the PWM when driving the TAS5261DKD?
The recommended modulation index is 96.1%.
- How does the TAS5261DKD handle overtemperature conditions?
The device asserts an active-low warning signal (OTW) when the junction temperature exceeds the OTW level, and it shuts down if the temperature exceeds the OTE level, setting all half-bridge outputs to high-impedance state (Hi-Z).
- What is the role of the PWM Activity Detector in the TAS5261DKD?
The PWM Activity Detector monitors individual PWM inputs and shuts down the device if any input is stuck in either a high or low state for more than a defined length of time.
- What is the significance of the bootstrap circuitry in the TAS5261DKD?
The bootstrap circuitry accommodates the high-side gate drive, requiring only a few external capacitors for optimal operation.
- What are the recommended power supply voltages for the TAS5261DKD?
The recommended supply voltages are PVDD_x = 50 V, GVDD_x = 12 V, and VDD = 12 V.
- How does the TAS5261DKD ensure EMI compliance?
The device is EMI compliant when used with recommended system design and PCB layout.
- What is the package type of the TAS5261DKD?
The device is packaged in a thermally-enhanced 36-pin PSOP3 package.
