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参数资料
| 型号： | TAS5601DCARG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO56 |
| 封装： | GREEN, PLASTIC, HTSSOP-56 |
| 文件页数： | 6/26页 |
| 文件大小： | 2698K |
| 代理商： | TAS5601DCARG4 |
Protection Mechanisms in the TAS5601
Single-Ended Output Capacitor, CO
Output Filter and Frequency Response
OUTA
Lfilter
Cfilter
OUTA
Lfilter
Cfilter
Lfilter
OUTB
Cfilter
Power-Supply Decoupling, CS
SLAS585A – FEBRUARY 2008 – REVISED SEPTEMBER 2008....................................................................................................................................... www.ti.com
SCP (short-circuit protection, OCP) protects against shorts across the load, to GND, and to PVCC.
OTP turns off the device if T
die (typical) > 150°C.
UVP turns off the device if PVCC (typical) < 8.4 V
OVP turns off the device if PVCC (typical) > 27.5 V
In single-ended (SE) applications, the dc blocking capacitor forms a high-pass filter with the speaker impedance.
The frequency response rolls of with decreasing frequency at a rate of 20 dB/decade. The cutoff frequency is
determined by
fc = 1/2πCOZL
Table 1 shows some common component values and the associated cutoff frequencies:
Table 1. Common Filter Responses
CSE – DC Blocking Capacitor (F)
Speaker Impedance (
)
fc = 60 Hz (–3 dB)
fc = 40 Hz (–3 dB)
fc = 20 Hz (–3 dB)
4
680
1000
2200
8
330
470
1000
For the best frequency response, a flat-passband output filter (second-order Butterworth) may be used. The
output filter components consist of the series inductor and capacitor to ground at the output pins. There are
several possible configurations, depending on the speaker impedance and whether the output configuration is
single-ended (SE) or bridge-tied load (BTL). Table 2 lists the recommended values for the filter components. It is
important to use a high-quality capacitor in this application. A rating of at least X7R is required.
Table 2. Recommended Filter Output Components
Output Configuration
Speaker Impedance (
)
Filter Inductor (
H)
Filter Capacitor (nF)
4
22
680
Single Ended (SE)
8
47
390
4
10
1500
Bridge Tied Load (BTL)
8
22
680
Figure 17. BTL Filter Configuration
Figure 18. SE Filter Configuration
The TAS5601 is a high-performance CMOS audio amplifier that requires adequate power-supply decoupling to
14
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TAS5601
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