công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
TA2021B bảng dữ liệu(PDF) 9 Page - Tripath Technology Inc. |
|
TA2021B bảng dữ liệu(HTML) 9 Page - Tripath Technology Inc. |
9 / 12 page Tri p ath T echno l o g y, I n c. - Techn i cal I n f ormati on 9 TA2021B – 3.0/04.03 after the decoupling capacitors and use short returns to PGND1. These low side diodes, D1 and D2, will prevent the outputs from going below ground. To be optimally effective they must have a short and direct return path to its proper ground pin (PGND1) of the TA2021B. This can be achieved with a ground plane or a trace. Additionally, each channel must use Schottky or Ultra Fast Recovery diodes with short returns to VDD if the supply voltage exceeds 13.5V. These high side diodes, D3 and D4, will prevent the outputs from going above VDD. To be optimally effective they must have a short and direct return path to its proper VDD pin (VDD1) of the TA2021B. This can be achieved with a ground plane or a trace. The output inductors, L2 and L3, should be placed close to the TA2021B without compromising the locations of the closely placed supply decoupling capacitors and output diodes. The purpose of placing the output inductors close to the TA2021B output pins is to reduce the trace length of the switching outputs. This will aid in reducing radiated emissions. Please see the External Component Description section on page 6 for more details on the above- mentioned components. The Application/ Test Circuit refers to the low side diodes as DO, The high side diodes as DH, and both supply decoupling capacitors as CSW. TA2021B Amplifier Gain The gain of the TA2021B is set by the ratio of two external resistors, RI and RF, and is given by the following formula: I F I O R R 12 V V − = where VI is the input signal level and VO is the differential output signal level across the speaker. Please note that OUTP1 and OUTP2 are 180° out of phase with their corresponding input signals. 20 watts of RMS output power results from an 8.944 Vrms signal across a four-ohm speaker load. If RF = RI, then 20 Watts will be achieved with 0.745 Vrms of input signal. ) W 20 4 ( ) P R ( V 944 . 8 O L RMS ∗ Ω = ∗ = Protection Circuits The TA2021B is guarded against over-temperature and over-current conditions. When the device goes into an over-temperature or over-current state, the FAULT pin goes to a logic HIGH state indicating a fault condition. When this occurs, the amplifier is muted, all outputs are TRI- STATED, and will float to 1/2 of VDD. Over-temperature Protection An over-temperature fault occurs if the junction temperature of the part exceeds approximately 155 °C. The thermal hysteresis of the part is approximately 45°C, therefore the fault will automatically clear when the junction temperature drops below 110 °C. Over-current Protection An over-current fault occurs if more than approximately 7 amps of current flows from any of the amplifier output pins. This can occur if the speaker wires are shorted together or if one side of the speaker is shorted to ground. An over-current fault sets an internal latch that can only be cleared if the MUTE pin is toggled or if the part is powered down. Alternately, if the MUTE pin is |
Số phần tương tự - TA2021B |
|
Mô tả tương tự - TA2021B |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |