Overview
The NCP2820FCT1G, produced by onsemi, is a cost-effective mono Class-D audio power amplifier. This device is capable of delivering 2.65 W of continuous average power to a 4.0 Ω load from a 5.0 V supply in a Bridge Tied Load (BTL) configuration. It is optimized for use in cellular handsets, PDAs, and other portable devices, offering significant space and cost savings due to its filterless design when used with inductive transducers. The NCP2820FCT1G features high efficiency, low quiescent current, and fast startup times, making it an ideal choice for battery-powered applications.
Key Specifications
| Characteristic | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Supply Voltage | TA = −40°C to +85°C | 2.5 | 5.5 | V | |
| Supply Quiescent Current | Vp = 3.6 V, RL = 8.0 Ω, No Load | 2.15 | 4.6 | mA | |
| Shutdown Current | Vp = 4.2 V, TA = +25°C | 0.42 | 0.8 | μA | |
| Max Output Current | 1.5 | A | |||
| Switching Frequency | Vp from 2.5 V to 5.5 V | 190 | 250 | 310 | kHz |
| Total Harmonic Distortion + Noise (THD+N) | Vp = 5.0 V, RL = 8.0 Ω, f = 1.0 kHz, Pout = 0.25 W | 0.05 | % | ||
| Power Supply Rejection Ratio (PSRR) | Vp_ripple_pk−pk = 200 mV, RL = 8.0 Ω, f = 1.0 kHz | −65 | dB | ||
| Turn On Time | Vp from 2.5 V to 5.5 V | 9.0 (NCP2820), 1.0 (NCP2820A) | ms |
Key Features
- Optimized PWM Output Stage with filterless capability
- High efficiency up to 90%
- Low quiescent current of 2.15 mA typical
- Large output power capability: 1.4 W with 8.0 Ω load and THD+N < 1%
- Ultra-fast startup time: 1 ms for NCP2820A version
- High performance with THD+N of 0.03% @ Vp = 5.0 V, RL = 8.0 Ω, Pout = 100 mW
- Excellent PSRR (−65 dB): No need for voltage regulation
- Surface-mounted package options: 9-pin Flip-Chip CSP and UDFN8
- Fully differential design eliminating the need for two input coupling capacitors
- Very fast turn-on and turn-off times with advanced rising and falling edges
Applications
The NCP2820FCT1G is particularly suited for use in cellular handsets, PDAs, and other portable electronic devices. Its filterless design and high efficiency make it ideal for applications where space and power consumption are critical. It can drive multiple audio sources such as earpieces, loudspeakers, and melody ringers with a single device, making it a versatile choice for various audio applications.
Q & A
- What is the maximum output power of the NCP2820FCT1G?
The NCP2820FCT1G can deliver up to 2.65 W of continuous average power to a 4.0 Ω load from a 5.0 V supply in a BTL configuration.
- What is the typical quiescent current of the NCP2820FCT1G?
The typical quiescent current is 2.15 mA at Vp = 3.6 V and RL = 8.0 Ω with no load.
- What is the switching frequency range of the NCP2820FCT1G?
The switching frequency ranges from 190 kHz to 310 kHz over the supply voltage range from 2.5 V to 5.5 V.
- How efficient is the NCP2820FCT1G?
The device has an efficiency of up to 90% at certain operating conditions.
- What is the typical turn-on time for the NCP2820A version?
The typical turn-on time for the NCP2820A version is 1 ms.
- What is the maximum junction temperature of the NCP2820FCT1G?
The maximum junction temperature is 150°C.
- What is the power supply rejection ratio (PSRR) of the NCP2820FCT1G?
The PSRR is −65 dB at certain operating conditions.
- What are the package options available for the NCP2820FCT1G?
The device is available in 9-pin Flip-Chip CSP and UDFN8 surface-mounted packages.
- Does the NCP2820FCT1G require external coupling capacitors?
No, the fully differential design eliminates the need for two input coupling capacitors.
- What is the shutdown current of the NCP2820FCT1G?
The shutdown current is typically 0.42 μA at Vp = 4.2 V and TA = +25°C.
