https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091890#M55 <P>从这个时钟图来看。这个外部时钟输入没有经过分频。进入与内部时钟的选通器。这个时钟源频率加倍。输出的pwm频率也应该加倍吧</P> Tue, 06 May 2025 05:42:15 GMT longzhengbing202002 2025-05-06T05:42:15Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091761#M46 <P>The maximum PWM frequency of PCA9685 is 1500Hz. Can this maximum frequency be increased to 3000Hz? Or is there an alternative IC with a maximum PWM frequency of 3000Hz? Thank you.</P> Tue, 06 May 2025 01:50:37 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091761#M46 longzhengbing202002 2025-05-06T01:50:37Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091798#M47 How should I operate if I need a PWM frequency of 3000 Hz? Tue, 06 May 2025 02:45:19 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091798#M47 longzhengbing202002 2025-05-06T02:45:19Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091813#M48 <P>选择这个吧---PCA9956</P> Tue, 06 May 2025 03:02:44 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091813#M48 guoweisun 2025-05-06T03:02:44Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091824#M49 这个频率不能调节 需要频率可调<BR /> Tue, 06 May 2025 03:13:49 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091824#M49 longzhengbing202002 2025-05-06T03:13:49Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091827#M50 如果PCA9685 通过外接50MHZ的输入 能改变输出频率加倍是最好的 我可以直接替换 Tue, 06 May 2025 03:15:42 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091827#M50 longzhengbing202002 2025-05-06T03:15:42Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091831#M51 <P>你是要具体怎么使用？为何非要用3KHZ的频率？</P> Tue, 06 May 2025 03:21:16 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091831#M51 guoweisun 2025-05-06T03:21:16Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091832#M52 原来的1.5kHZ 在我们的摄像头光源上 会有点干扰 我们想把频率提高一倍<BR /> Tue, 06 May 2025 03:24:42 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091832#M52 longzhengbing202002 2025-05-06T03:24:42Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091859#M53 <P>没有更合适的产品可以推荐目前，建议确认是不是这个频率端引起的，可以通过操作PRE_SCALE寄存器去更改频率试试。</P> Tue, 06 May 2025 04:38:30 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091859#M53 guoweisun 2025-05-06T04:38:30Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091879#M54 <P>这样使用应该不可以</P> Tue, 06 May 2025 05:26:49 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091879#M54 guoweisun 2025-05-06T05:26:49Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091890#M55 <P>从这个时钟图来看。这个外部时钟输入没有经过分频。进入与内部时钟的选通器。这个时钟源频率加倍。输出的pwm频率也应该加倍吧</P> Tue, 06 May 2025 05:42:15 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091890#M55 longzhengbing202002 2025-05-06T05:42:15Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091895#M56 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="guoweisun_0-1746510344212.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/336292i54F1F050B2F6993F/image-size/medium?v=v2&amp;px=400" role="button" title="guoweisun_0-1746510344212.png" alt="guoweisun_0-1746510344212.png" /></span></P> <P>&nbsp;</P> <P>你可以测试下按照上面的这个公式。</P> Tue, 06 May 2025 05:47:57 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2091895#M56 guoweisun 2025-05-06T05:47:57Z https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2110457#M66 <P>通过测试验证 外接50M 晶振⑧分频系数设置为3 可以把频率提高到3000hz</P> Wed, 04 Jun 2025 13:05:00 GMT https://community.nxp.com/t5/High-Performance-Analog-Front/pca9685-pwm-frequency/m-p/2110457#M66 longzhengbing202002 2025-06-04T13:05:00Z