- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373643 > TK2019 (Electronic Theatre Controls, Inc.) STEREO 20W (4OHM) CLASS-T DIGITAL AUDIO AMPLIFIER PDF資料下載
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)： | 16/21頁 |
| 文件大?。?/td> | 414K |
| 代理商： | TK2019 |
Tripath Technology, Inc. - Technical Information
16
TK2019 – MC/2.1/10-03
Over- and Under-Voltage Protection
The TC2001 senses the power rails through external resistor networks connected to VPPSENSE.
The over- and under-voltage limits are determined by the values of the resistors in the networks, as
described in the table “Test/Application Circuit Component Values”. If the supply voltage falls outside
the upper and lower limits determined by the resistor networks, the TC2001 shuts off the TPS1035
output stage. The removal of the over-voltage or under-voltage condition returns the TK2019 to
normal operation. Please note that trip points specified in the Electrical Characteristics table are at
25
°
C and may change over temperature.
The TC2001 has built-in over and under voltage protection for both the VPP and VNN supply rails.
The nominal operating voltage will typically be chosen as the supply “center point.” This allows the
supply voltage to fluctuate, both above and below, the nominal supply voltage. For the TK2019 only
the VPP (VDD) supply rail will be sensed and the VNN sensing will not be used so pin 17 of the
TC2001 will be shorted to ground.
VPPSENSE (pin 19) performs the over and undervoltage sensing for the positive supply, VPP. When
the current through R
VPPSENSE
goes below or above the values shown in the Electrical Characteristics
section (caused by changing the power supply voltage), the TK2019 will be muted. VPPSENSE (pin
19) is internally biased at 2.5V.
Once the supply comes back into the supply voltage operating range (as defined by the supply sense
resistors), the TK2019 will automatically be unmuted and will begin to amplify. There is a hysteresis
range on both the VPPSENSE and VNNSENSE pins. If the amplifier is powered up in the hysteresis
band the TK2019 will be muted. Thus, the usable supply range is the difference between the over-
voltage turn-off and under-voltage turn-off for both the VPP supply. It should be noted that there is a
timer of approximately 200mS with respect to the over and under voltage sensing circuit. Thus, the
supply voltage must be outside of the user defined supply range for greater than 200mS for the
TK2019 to be muted.
The equation for calculating R
VPP1
is as follows:
VPP
R
=
VPPSENSE
VPP1
I
Set
VPP1
VPP2
R
R
=
.
I
VPPSENSE
can be any of the currents shown in the Electrical Characteristics table for
VPPSENSE.
The two resistors, R
VPP2
and R
VNN2
compensate for the internal bias points. Thus, R
VPP1
and R
VNN1
can be used for the direct calculation of the actual VPP and VNN trip voltages without considering the
effect of R
VPP2
and R
VNN2
.
Using the resistor values from above, the actual minimum over voltage turn off points will be:
I
R
VPP
×
=
The other three trip points can be calculated using the same formula but inserting the appropriate
I
VPPSENSE
current value. As stated earlier, the usable supply range is the difference between the
minimum overvoltage turn off and maximum under voltage turn-off for the VPP supply.
VPP
-
VPP
VPP
=
RN_OFF)
(MIN_OV_TU
VPPSENSE
VPP1
N_OFF
MIN_OV_TUR
N_OFF
MAX_UV_TUR
N_OFF
MIN_OV_TUR
RANGE
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TK5530 | READ ONLY TRANSPONDER |
| TK5530HM | READ ONLY TRANSPONDER |
| TK5530HM-232-PP | READ ONLY TRANSPONDER |
| TK5551 | STANDARD READ /WRITE ID TRANSPONDER WITH ANTI COLLISION |
| TK5552 | Read/Write Transponder |
相關(guān)代理商/技術(shù)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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。