NJU8752 NJR Corporation, NJU8752 Datasheet - Page 3

• Manufacturer Part Number: NJU8752
• Description: Analog Signal Input Class D Amplifier For Piezo Speaker
• Manufacturer: NJR Corporation

! FUNCTIONAL DESCRIPTION
(1) Signal Output
(2) Standby
(3) Mute
(4) Low Voltage Detector
(5) Short Circuit Protection
Ver.2003-05-29
2nd-order or higher LC filter. A switching regulator with a high response against a voltage fluctuation is the best
selection for the V
stabilization of the power is required.
NJU8752 enter a low-power state, and the output pins (OUT
OUT
to generate unwanted frequency, and the output pins (OUT
After about 5 seconds from the protection, the NJU8752 returns to normal operation. The short protector
functions at the following accidents.
Note 1) The detectable current and the period for the protection depend on the power supply voltage
Note 2) The short protector is not effective for a long term short-circuit but for an instantaneous accident.
The OUT
By setting the STBY pin to “L”, the standby mode is enabled. In the standby mode, the entire functions of the
By setting the MUTE pin to “L”, the Mute function is enabled. In the Mute mode, the output pins (OUT
When the power supply voltage drops down to below V
The short protector, which protects the NJU8752 against high short-circuit current, turns off the output driver.
N
) output square wave (Duty: 50%).
Short between OUT
Short between OUT
Short between OUT
and ambient temperature.
Continuous high-current may cause permanent damage to the NJU8752.
P
and OUT
DDO
, which are the power supply for output drivers. To obtain better THD performance, the
N
generate PWM output signals, which will be converted to analog signal via external
P
P
N
and OUT
and V
and V
SS
SS
N
DD
P
(MIN), the internal oscillation is halted for prevention
P
and OUT
and OUT
N
) become in high impedance.
N
) are high impedance.
NJU3555
NJU8752
P
- 3 -
and