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LP3515 Datasheet(PDF) 5 Page - Shenzhen Xinmao Microelectronics Co., Ltd. |
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LP3515 Datasheet(HTML) 5 Page - Shenzhen Xinmao Microelectronics Co., Ltd. |
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5 / 7 page  LP3515 高性能副边同步整流驱动芯片 LP3515_CN_DS_Rev.1.6 www.chip-hope.com SHENZHEN Chip Hope Micro-electronics LTD Confidential– Customer Use Only 内部结构框图 电源产生模块 BG VREF IREF BG Vref UVLO POK 逻辑单元 驱动 VCC GND DET BG SR_ ON AE ON POK 原边开通判定 副边断续预估 Vref 0.5V DET OFF_ EN DRV 同步整流 关断模块 D 图 3 LP3515 内部框图 PWM gnd D DRV Vin/Nps DRV 为高后，屏蔽 0.9uS，排除干扰 GND GND 激磁振荡，会误判断同步整流管开启 0.9uS 图 4 系统关键节点相对于 LP3515 的 GND 波形 |
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