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Details, datasheet, quote on part number:NJU8719V
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| Part: | NJU8719V |
| Category: | Multimedia => Audio => Drivers |
| Description: | Monaural BTL Output Switching Driver For Class-d Amplifier <<<>>>The NJU8719 is a Monaural BTL Output Switching Driver<<<>>>for Class D Amplifier. It Converts 1bit Digital Signal Input,<<<>>>such as PWM or PDM Signal, to Analog Signal Output With<<<>>>simple External LC Low-pass Filter.<<<>>>the NJU8719 Realizes Very High Power-efficiency By<<<>>>class D Operation. Therefore, it is Suitable For Portable<<<>>>set With Speaker.<<<>>>! FEATURES<<<>>># 1-channel 1bit Audio Signal Input<<<>>># Monaural BTL Output<<<>>># Standby(Hi-Z) Control Function<<<>>># Operating Voltage : 2.4V to 5.25V<<<>>># CMOS Technology<<<>>># Package Outline : SSOP10 |
| Company: | NJR Corporation |
| Datasheet: | Download NJU8719V datasheet File size : 81 kB |
| Request For quote: | Find where to buy NJU8719V
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Datasheet text preview:
NJU8719
PRELIMINARY
Monaural BTL Output Switching Driver for Class D Amplifier
! GENERAL DESCRIPTION
The NJU8719 is a monaural BTL output switching driver for class D amplifier. It converts 1bit digital signal input, such as PWM or PDM signal, to analog signal output with simple external LC low-pass filter. The NJU8719 realizes very high power-efficiency by class D operation. Therefore, It is suitable for portable set with speaker.
! PACKAGE OUTLINE
NJU8719V
! FEATURES
# # # # # # 1-channel 1bit Audio Signal Input Monaural BTL Output Standby(Hi-Z) Control Function Operating Voltage : 2.4V to 5.25V CMOS Technology Package Outline : SSOP10
! PIN CONFIGURATION
VDD IN NC MCK STBYB 1 2 3 4 5 10 9 8 7 6 VSS OUTP VDDO OUTN VSS
! BLOCK DIAGRAM
VDD
VDDO VSS
IN Dead Time Generator MCK
OUTP
OUTN
STBYB
VSS
Ver.2004-05-20
-1-
NJU8719
! TERMINAL DESCRIPTION
No. 1 2 3 4 SYMBOL VDD IN NC MCK I/O - I - I Function Power Supply, VDD=5V 1-bit Data Input Terminal Non connection Master Clock Input Terminal
The condition of the data input terminal is fetched with the rising edge of this signal.
Standby Control Terminal (L:Standby) 5 STBYB I 6 Power GND and Output GND terminal: VSS=0V VSS - 10 7 OUTN O Negative output 8 VDDO - Output Power Supply, VDD=5V 9 OUTP O Positive output *VSS(Terminal No.6,10) should be connected at a nearest point to the IC. *VDD(Terminal No.1) and VDDO(Terminal No.8) should be connected at a nearest point to the IC. *STBYB(Terminal No.5) must be connected to VDD, when this terminal is not used.
! INPUT TERMINAL STRUCTURE
VDD
Input Terminal VSS
-2-2-
Ver.2004-05-20
NJU8719 NJU3555
! FUNCTIONAL DESCRIPTION
(1) Signal Output The OUTP and OUTN generate PMW output signal, which is converted to analog signal via external 2nd-order or higher LC filter. The NJU8719 drives a speaker by the BTL output, and OUTP is a positive output and OUTN is a negative outputs. A switching regulator with a high response against a voltage fluctuation is the best selection for the VDDO, which is the power supply for output drivers. To obtain better T.H.D. performance, the stabilization of the power is required. (2) Standby Control Function By setting the STBYB terminal to "L", the NJU8719 becomes standby condition. OUTP and OUTN are in Hi-Z.
During standby condition,
(3) Master Clock Master clock (MCK) synchronizes with the Audio signal input (IN). The setup time and the hold time should be kept in the AC characteristics because IN is fetched with the rising edge of MCK. MCK requires jitter-free or jitter as small as possible because the jitter downs S/N ratio. OUTP and OUTN occur the pop noise when MCK is stopped in operation without standby mode. Therefore, the standby mode should be set before MCK stop.
Ver.2004-05-20
-3-
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