전자부품 데이터시트 검색엔진 |
|
TDA8569Q 데이터시트(PDF) 5 Page - NXP Semiconductors |
|
TDA8569Q 데이터시트(HTML) 5 Page - NXP Semiconductors |
5 / 18 page 2003 Aug 08 5 Philips Semiconductors Product specification 4 × 40 W BTL quad car radio power amplifier TDA8569Q FUNCTIONAL DESCRIPTION The TDA8569Q contains four identical amplifiers which can be used for bridge applications. The gain of each amplifier is fixed at 26 dB. Mode select switch (pin MODE) • Standby: low supply current (<100 µA) • Mute: input signal suppressed • Operating: normal on condition. Since this pin has a low input current (<80 µA), a low cost supply switch can be applied. To avoid switch-on plops, it is advised to keep the amplifier in the mute mode during ≥150 ms (charging of the input capacitors at pins IN1, IN2, IN3 and IN4). This can be realized by: • Microprocessor control • External timing circuit (see Fig.3). Diagnostic output (pin VDIAG) DYNAMIC DISTORTION DETECTOR (DDD) At the onset of clipping of one or more output stages, the dynamic distortion detector becomes active and pin VDIAG goes LOW. This information can be used to drive a sound processor or DC volume control to attenuate the input signal and so limit the distortion. The output level of pin VDIAG is independent of the number of channels that are clipping (see Fig.4). SHORT-CIRCUIT DIAGNOSTIC When a short-circuit occurs at one or more outputs to ground or to the supply voltage, the output stages are switched off until the short-circuit is removed and the device is switched on again, with a delay of approximately 10 ms after removal of the short-circuit. During this short-circuit condition, pin VDIAG is continuously LOW. When a short-circuit occurs across the load of one or more channels, the output stages are switched off for approximately 10 ms. After that time it is checked during approximately 50 µs to determine whether the short-circuit is still present. Due to this duty cycle of 50 µs/10 ms the average current consumption during this short-circuit condition is very low. During this short-circuit condition, pin VDIAG is LOW for 10 ms and HIGH for 50 µs (see Fig.5). The protection circuits of all channels are coupled. This means that if a short-circuit condition occurs in one of the channels, all channels are switched off. Consequently, the power dissipation in any short-circuit condition is very low. TEMPERATURE PRE-WARNING When the virtual junction temperature Tvj reaches 145 °C, pin VDIAG goes LOW. OPEN COLLECTOR OUTPUTS The diagnostic pin has an open-collector output, so more devices can be tied together. An external pull-up resistor is needed. Fig.3 Mode select switch circuitry. handbook, halfpage 100 k Ω MGA708 47 µF 10 k Ω 100 Ω mode select switch VP handbook, halfpage VDIAG 0 VP Vo 0 t MCE461 Fig.4 Distortion detector waveform. |
유사한 부품 번호 - TDA8569Q_15 |
|
유사한 설명 - TDA8569Q_15 |
|
|
링크 URL |
개인정보취급방침 |
ALLDATASHEET.CO.KR |
ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 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 |