Texas Instruments APA100 manual Features, Power Requirements

Features

1.1 Features

This reference design or evaluation module (EVM) features the TPA2001D1, TAS5111, and TLV2464A. For simplicity, this EVM is referred to as the APA100 EVM to cover all parts that are supported in this user’s guide. The APA100 EVM is an evaluation module designed for a quick and easy way to evaluate the functionality and performance of the 100−W analog input class−D amplifier.

The features of this amplifier follow.

-Wide supply range of 18 V to 29.5 V

->85% efficiency into 4 Ω and 8 Ω

-100 W at 4% THD+N with 29.5-V supply and 4-Ωload

-100 W at 10% THD+N with 28-V supply and 4-Ωload

-63 W at 10% THD+N with 29.5-V supply and 8-Ωload

-THD+N = 0.04% at 1 W with 29.5-V supply and 4-Ωload

-THD+N = 0.03% at 1 W with 29.5-V supply and 8-Ωload

-SNR = 95 dB

-Supply rejection = 63 dB at 1 kHz

-Internal short circuit and thermal protection

-Onboard 3−V supply for TPA2001D1 and TLV2464A

-Module gain set to 31.4 dB typical and easily adjusted.

Figure 1−1 shows the amplifier’s (a) THD+N vs output power and (b) THD+N vs frequency with a 4-Ωload, respectively. More graphs are shown in Chapter 5, Measured Results.

Figure 1−1. THD+N vs Output Power (a), THD+N vs Frequency (b)

THD+N − Total Harmonic Distortion + Noise − %

20

10f = 1 kHz,

PVDD = 15 V, 18 V,

5 20 V, 28 V, 29.5 V

2

1

0.5

0.2

0.1

0.05

0.02

0.01

100 m 500 m 1 5 10 20 50 100 200

PO − Output Power − W

THD+N − Total Harmonic Distortion + Noise − %

100
50
20
10
5
2
1
					70 W
0.5	1 W		10 W	40 W
0.2
0.1
0.05
0.02
0.01
20	50	100 200		1 k 2 k	10 k 20 k

f − Frequency − Hz

(a) (b)

1.2 Power Requirements

The following sections describe the power requirements of this EVM.

1.2.1Supply Voltage

The 18-V to 29.5-V supply (A+) is applied across the power supply banana plugs J3 and J4. Apply 18 V to 29.5 V to J3 and ground to J4. A zener diode

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