NJW4201系列

Oscillator with Spread Spectrum Frequency Modulation for Switching Regulator

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概述

NJW4201 is a high precision oscillator IC with spread spectrum frequency modulation (SSFM) made for switching regulator. The output of a clock with spread spectrum frequency modulation reduces the peak level of electromagnetic radiation. The NJW4201 SSFM function changes ±5% max of center frequency, and is modulated with a linear signal. The modulation rate can be selected from A1 version: f_OSC/512, f_OSC/128, A2 version: f_OSC/2048, f_OSC/512. The NJW4201 oscillator operates at an oscillation frequency from 280kHz to 2.4MHz, and outputs an anti-phase clock through two output pins. Therefore, it is suitable for the external synchronization signal application of the switching regulator.

规格

	消费
电源电压	2.7V ～ 5.5V
频率范围	280kHz ～ 2400kHz
频率系数	±5%
通道数	2
构造	Bi-CMOS技术
工作温度范围	-40℃ ～ +125℃
结温	+150℃
封装	DFN8-U1(ESON8-U1) SOT-23-6-1
反相输出可减少纹波电流	0°, 180°
可选调制率	A1版本: f_OSC/512, f_OSC/128, No effect A2版本: f_OSC/2048, f_OSC/512, No effect
备注	高精度振荡频率扩展频谱可消减EMI 噪声峰值频率変化量为 ±5% max.，128 阶段的线性频率扩展欠压锁定保护电路待机功能