Texas Instruments APA100 - Manual (Page 8)

Features
1-2
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-
Ω
load
- 100 W at 10% THD+N with 28-V supply and 4- Ω load
- 63 W at 10% THD+N with 29.5-V supply and 8- Ω load
- THD+N = 0.04% at 1 W with 29.5-V supply and 4-
Ω
load
- THD+N = 0.03% at 1 W with 29.5-V supply and 8-
Ω
load
- 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-
Ω
load, respectively. More graphs are shown in Chapter
5, Measured Results.
Figure 1−1. THD+N vs Output Power (a), THD+N vs Frequency (b)
f = 1 kHz,
PVDD = 15 V, 18 V,
20 V, 28 V, 29.5 V
20
10
2
5
1
0.2
0.5
0.1
0.02
0.05
0.01
100 m 500 m 1 5 10 20 50 100 200
THD+N − T
otal Harmonic Distortion + Noise − %
P O − Output Power − W
100
20
50
10
2
5
1
0.2
0.5
0.1
0.02
0.05
0.01
20 50 100 200 1 k 2 k 10 k 20 k
70 W
40 W 10 W 1 W
THD+N − T
otal Harmonic Distortion + Noise − %
f − Frequency − Hz
(a) (b)
1.2 Power Requirements
The following sections describe the power requirements of this EVM.
1.2.1 Supply 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