ADM1275
目录
特点................................................. ............................................. 1
应用................................................. ...................................... 1
应用示意图................................................ ...................... 1
概述................................................ ......................... 1
修订历史................................................ ............................... 3
规格................................................. .................................... 4
串行总线时序特性.............................................. 7
绝对最大额定值............................................... ............. 8
热特性................................................ .............. 8
ESD注意事项................................................ .................................. 8
引脚配置和功能描述........................... 9
典型性能特征........................................... 14
功能框图............................................... ............ 20
工作原理............................................... ....................... 21
供电ADM1275 ............................................... ............. 21
电流检测输入............................................... ................... 21
电流限制参考............................................... ............. 22
设置电流限制（ ISET ） ........................................... .. 22
软启动................................................ ...................................... 23
折返................................................. ...................................... 23
定时器................................................. ........................................... 24
热插拔重试占空比............................................ .......... 24
FET栅极驱动线夹.............................................. ............... 24
快速反应严重过流...................................... 25
欠压和过压............................................... 25 ..
使能输入（ ADM1275-3只） ........................................ 25
电源良好................................................ ................................. 25
VOUT测量................................................ ................. 26
FET健康................................................ .................................. 26
电源监视器................................................ ............................ 26
PMBus接口................................................ ............................. 27
器件寻址................................................ ...................... 27
SMBus协议使用............................................... ................ 27
分组差错校验............................................... ................ 27
完整的事务对我
2
C总线................................................ 27
数据表
SMBus的消息格式............................................... ............ 28
组命令................................................ ..................... 29
热插拔控制命令............................................. .... 30
ADM1275信息命令........................................ 30
状态命令................................................ ...................... 30
GPO和ALERT引脚设置命令.................................... 31
电力监控命令............................................... ....... 31
警告限制设置命令............................................ 32
PMBus的直接格式转换.......................................... 32
电压和电流转换使用LSB值............... 33
ADM1275 ALERT引脚行为.............................................. ........ 34
故障和警告............................................... ................... 34
生成警报............................................... .................... 34
搬运/清除警报............................................. ......... 34
SMBus报警响应地址.............................................. 35
...................例如使用SMBus报警响应地址35
的PMBus命令参考............................................... ......... 36
操作................................................. ............................. 37
CLEAR_FAULTS ................................................. ....................... 37
能力的................................................. ............................. 37
VOUT_OV_WARN_LIMIT ................................................. .... 37
VOUT_UV_WARN_LIMIT ................................................. .... 37
IOUT_OC_WARN_LIMIT ................................................. ..... 37
IOUT_WARN2_LIMIT ................................................. ............ 38
VIN_OV_WARN_LIMIT ................................................. ........ 38
VIN_UV_WARN_LIMIT ................................................. ........ 38
STATUS_BYTE ................................................. ......................... 38
STATUS_WORD ................................................. ....................... 39
STATUS_VOUT ................................................. ........................ 39
STATUS_IOUT ................................................. ......................... 39
STATUS_INPUT ................................................. ....................... 40
STATUS_MFR_SPECIFIC ................................................. ....... 40
READ_VIN ................................................. ................................ 40
READ_VOUT ................................................. ............................ 41
READ_IOUT ................................................. ............................. 41
PMBUS_REVISION ................................................. ................. 41
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