NJU8716B

NJU8716A/B www.DataSheet4U.com PRELIMINARY Switching Driver with Regulator for Class-D Headphone Amplifier GENERAL DESCRIPTION The NJU8716A/B is switching driver with regulator for class-D headphone amplifier. It incorporates optimum regulator for the driver of headphone amplifier. The NJU8716A/B converts 1bit audio signals such as PWM/PDM to analog audio signals with simple external LC low-pass filter. The NJU8716A/B provides completed digital system and high power-efficiency with class-D operation. Therefore it is suitable for portable audio applications. PACKAGE OUTLINE NJU8716AV, NJU8716BV FEATURES 2-channel 1bit Audio Signal Input Headphone Output Built-in Regulator for Driver Logic Operating Voltage 1.7~3.0V(VDD) Driver Operating Voltage 1.6~3.5V(VDDO1, VDDO2) Regulator Operating Voltage 4.0~5.75V(VREG1) 1.9~4.0V(VREG2) C-MOS Technology Package Outline SSOP16 PIN CONFIGURATION VREGO CFB VREG1 VCONT VSS MCK VDD DIN2 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VREG2 VDDO2 OUT2 VSSO VSSO OUT1 VDDO1 DIN1 Version Lineup Version NJU8716A NJU8716B Data Latch The rising edge of MCK The falling edge of MCK BLOCK DIAGRAM VCONT VREG1 VREG2 CFB VREGO Low Voltage Detector VREGO VDD VSS DIN1 Low Voltage Detector VDD Regulator VDDO1 Level Shifter Pre Driver HP Amp OUT1 VSSO VDDO2 Level Shifter MCK Level Shifter Pre Driver DIN2 Level Shifter HP Amp OUT2 VSSO Ver.2005-03-09 -1- NJU8716A/B www.DataSheet4U.com TERMINAL DESCRIPTION No. 1 2 3 16 4 5 6 7 9 8 10 15 11 14 12 13...