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參數(shù)資料
| 型號： | TK2019 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | STEREO 20W (4OHM) CLASS-T DIGITAL AUDIO AMPLIFIER |
| 中文描述： | 立體聲20瓦（4Ω）類- T的數(shù)字音頻放大器 |
| 文件頁數(shù)： | 17/21頁 |
| 文件大?。?/td> | 414K |
| 代理商： | TK2019 |
Tripath Technology, Inc. - Technical Information
17
TK2019 – MC/2.1/10-03
Protection Circuits
The TK2019 is protected against over-current, over / under-voltage and over-temperature conditions.
8
TPS1035
FAULT
1K
FDLL914
8
TPS1035
FAULT
1K
FDLL914
10K
20K
510K
5V
5V
MUTE Pin
(Pin 24 of TC2001)
Q2
2N3906
+
HMUTE Pin
(Pin 8 of TC2001)
3K
30K
22uF
Q1
2N3906
3
3
SLEEP
SLEEP
HMUTE Pin
(Pin 8 of TC2001)
Figure 3
Figure 3 shows an overcurrent detection circuit that will mute the amplifier whenever the TPS1035
detects an overcurrent condition. The fault pin (pin 8 of the TPS1035) is an overcurrent indicator and
is normally high (approximately 5.4V). When an overcurrent condition is detected this pin will go low
(0V). When the fault pin goes low Q2 will turn on and pull the Mute pin of the TC2001 to 5V (if the
switch is closed). This is due to the fact that the emitter voltage of Q2 is controlled by the HMUTE pin
of the TC2001 through Q1. If HMUTE is low the emitter voltage of Q2 will be connected to the 5V line.
If HMUTE is high Q2 is disabled and the mute pin will be pulled low through the 20k
resistor. In this
circuit, whenever the switch is open the Mute pin will be pulled up to 5V and the amplifier will be
muted.
Whenever the MUTE pin on the TC2001 is high (or enabled) the HMUTE pin will also switch high.
The sleep pin of the TPS1035 is controlled by HMUTE of the TC2001 so that during any mute or
overcurrent condition the TPS1035 is placed in sleep mode. Whenever SLEEP is enabled, the
FAULT pin is low and mutes the TC2001. Q1 controls the emitter voltage of Q2 through HMUTE so
that whenever the SLEEP is enabled the TC2001 can become unmuted again.
Over-temperature Protection
An over-temperature fault occurs if the junction temperature of the TPS1035 exceeds approximately
165
°
C. The thermal hysteresis of the part is approximately 30
°
C, therefore the fault will automatically
clear when the junction temperature drops below 135
°
C.
HMUTE
The HMUTE pin on the TC2001 is a 5V logic output that indicates various fault conditions within the
device. These conditions include: over-current, overvoltage and undervoltage. The HMUTE output is
high whenever a fault condition occurs or mute is enabled. The HMUTE pin is capable of directly
driving an LED through a series 2k
resistor.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TK20-19,1/9,5-PVDF | 制造商:HellermannTyton 功能描述:HEATSHRINK, 2:1, 19.1MM, 1.2M 制造商:HELLERMANN TYTON 功能描述:HEATSHRINK, 2:1, 19.1MM, 1.2M; I.D. Supplied - Metric:19.1mm; I.D. Supplied - Imperial:0.751"; I.D. Recovered Max - Metric:9.5mm; I.D. Recovered Max - Imperial:0.374"; Shrink Ratio:2:1; Shrink Tubing / Boot Material:PVDF ;RoHS Compliant: Yes |
| TK20-191/95-PVDF | 制造商:HellermannTyton 功能描述:HEATSHRINK 2:1 19.1MM 1.2M |
| TK20-2,4/1,2-PVDF-CL | 制造商:HellermannTyton 功能描述:HEATSHRINK, 2:1, 2.4MM, 1.2M 制造商:HellermannTyton 功能描述:HEATSHRINK, 2:1, 2.4MM, 1.2M, I.D. Supplied - Metric:2.4mm, I.D. Supplied - Impe |
| TK20-24/12-PVDF-CL | 制造商:HellermannTyton 功能描述:HEATSHRINK 2:1 2.4MM 1.2M |
| TK20-25,4/12,7-PVDF | 制造商:HellermannTyton 功能描述:HEATSHRINK, 2:1, 25.4MM, 1.2M 制造商:HELLERMANN TYTON 功能描述:HEATSHRINK, 2:1, 25.4MM, 1.2M; I.D. Supplied - Metric:25.4mm; I.D. Supplied - Imperial:0.999"; I.D. Recovered Max - Metric:12.7mm; I.D. Recovered Max - Imperial:0.499"; Shrink Ratio:2:1; Shrink Tubing / Boot Material:PVDF ;RoHS Compliant: Yes |
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