TI中文支持网Part Number:LM3150
| Dear Sir. |
| LM3150 datasheet says Cbst is a 0.33 to 0.47-µF. |
| But the I wants to know what the Min. value of Cbst is. |
| What could happen if Cbst was set to 47nF? |
| And the SF is twice higher than the set value, Could you tell me why? |
| Your reply would be appreciated. |
| Design |
| Input Voltage : 14 ~ 24 V |
| Output Voltage : 8 V |
| Output Current : 5 A |
| Max Temperature : 85 deg |
| Switching Frequency : 130 KHz |
| Best Regard |
Johnsin Tao：
Hi
Chargepump的电容太小，转换能量太小，会导致高边驱动供电能力不足，特别是你限制只有十分之一略大，大幅度影响高边驱动能力。
需要按照datasheet 要求选择至少0.33uF.
