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TDA8588BJ 数据表(PDF) 12 Page - NXP Semiconductors |
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TDA8588BJ 数据表(HTML) 12 Page - NXP Semiconductors |
12 / 54 page 2004 Feb 24 12 Philips Semiconductors Product specification I2C-bus controlled 4 × 50 Watt power amplifier and multiple voltage regulator TDA8588J; TDA8588xJ V (V) t (sec) tbackup out of regulation VO(REG2) VBUCAP VP mdb512 Fig.5 Backup capacitor function. t backup C backup V P V OREG2 () – 0.5 – I L ---------------------------------------------------- × = Reset output A reset pulse is generated at pin RST when the output voltage of regulator 2 rises above the reset threshold value. The reset output is a push-pull output that both sources and sinks current. The output voltage can switch between ground and VO(REG2), and operates at a low regulator 2 voltage or VBUCAP. The RST signal is controlled by a low-voltage detection circuit which, when activated, pulls pin RST LOW (reset active) when VO(REG2) is ≤ Vth(rst). If VO(REG2) ≥ Vth(rst), pin RST goes HIGH. The reset pulse is delayed by 40 µs internally. To extend the delay and to prevent oscillations occurring at the threshold voltage, an external capacitor can be connected to pin RESCAP. Note that a reset pulse is not generated when VO(REG2) falls below the reset threshold value. Reset delay capacitor A Reset Delay Capacitor (RDC) connected to pin RESCAP can be used to extend the delay period of the reset pulse and to ensure that a clean reset signal is sent to the microcontroller. The RDC is charged by a current source. The reset output (pin RST) will be released (pin RST goes HIGH) when the RDC voltage crosses the RDC threshold value. Power switches There are two power switches that provide an unregulated DC voltage output for amplifiers and an aerial motor respectively. The switches have internal protection for over-temperature conditions and are activated by setting bits D2 and D3 of instruction byte IB1 to logic 1. The regulated outputs will supply pulsed current loads that can contaminate the line with high frequency noise, so it is important to prevent any cross-coupling between the regulated outputs, particularly with the 8.3 V audio supply, and the unregulated outputs. In the ON state, the switches have a low impedance to the battery voltage. When the battery voltage is higher than 22 V, the switches are switched off. When the battery voltage is below 22 V the switches are set to their original condition. |
类似零件编号 - TDA8588BJ |
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类似说明 - TDA8588BJ |
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