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NJU8752V Datasheet(PDF) 3 Page - New Japan Radio |
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NJU8752V Datasheet(HTML) 3 Page - New Japan Radio |
3 / 6 page NJU3555 NJU3555 NJU8752 -3 - FUNCTIONAL DESCRIPTION (1) Output Signal The OUTP and OUTN generate respectively L-channel and R-channel PWM output signals, which will be converted to analog signal via external 2nd-order or higher LC filter. A switching regulator with a high response against a voltage fluctuation is the best selection for the VDDP and VDDN, which are the power supply for output drivers. To obtain better T.H.D. performance, the stabilization of the power is key. (2) Standby By setting the STBY pin to “L”, the standby mode is enabled. In the standby mode, the entire functions of the NJU8752 enter a low-power state, and the output pins(OUTP and OUTN) are in high impedance. (3) Mute By setting the MUTE pin to “L”, the Mute function is enabled, and output pins(OUTP and OUTN) output square wave(Duty: 50%). (4) Low Voltage Detector When the power supply voltage drops down to below VDD(MIN), the internal oscillation is halted not to generate unwanted frequency, and the output pins(OUTP and OUTN) become in high impedance. (5) Short Protection Circuit The short protector, which protects the NJU8752 from high short-circuit current, turns off the output driver. After about 5 seconds from the protection, the NJU8752 returns to normal operation. The short protector is enabled in response to the following accidents. -Short between OUTP and OUTN -Short between OUTP and VSS -Short between OUTN and VSS Note 1) The detectable current and the period for the protection depend on the power supply voltage and ambient temperature. Note 2) The short protector is not effective for a long term short-circuit but for an instantaneous accident. Continuous high-current may cause permanent damage to the NJU8752. |
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