UCD3138数字电源外设编程手册(中文版).doc_jlinkucd3138

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UCD3138 数字电源外设

编程手册

SLUU995A

April 2013 – Revised May 2013

1 引言.............................................................................................................................11

2 数字脉宽调制器（DPWM）………........................................................................12

2.1 DPWM 框图 ...........................................................................................................12

2.2 DPWM 介绍（DPWM 多模式，开环）.............................................................13

2.3 DPWM 标准模式 ...................................................................................................15

2.4 DPWM 相移模式 ...................................................................................................17

2.5 DPWM 多输出模式（多模）...............................................................................17

2.6 DPWM 谐振模式 ...................................................................................................18

2.7 三角模式 ..................................................................................................................20

2.8 DPWM 前导模式 ...................................................................................................20

2.9 同步FET斜坡和理想二极管仿真计算 ...................................................................21

2.10 自动模式切换 ..........................................................................................................22

2.10.1 谐振LLC例子 ...........................................................................................................22

2.10.2 自动模式切换机制 ...................................................................................................22

2.11 DPWMC、边沿发生、内部多路复用.....................................................................23

2.12 多种DPWM寄存器时间分辨率 ..............................................................................24

2.13 PWM 计数器和时钟 ...............................................................................................26

2.14 DPWM 寄存器 -概述...............................................................................................26

2.15 DPWM 控制寄存器 0 (DPWMCTRL0) .................................................................26

2.15.1 DPWM 自动配置中间和最大寄存器 ...................................................................26

2.15.2 内部多路复用 ..........................................................................................................26

2.15.3 逐周电流限制使能 ..................................................................................................26

2.15.4 多模开/关.................................................................................................................28

2.15.5 最小占空比模式 ......................................................................................................28

2.15.6 主同步控制选择 ......................................................................................................29

2.15.7 主同步从使能 ..........................................................................................................29

2.15.8 D 使能.......................................................................................................................29

2.15.9 谐振模式固定占空比使能 ......................................................................................29

2.15.10 DPWM A and B 故障极性 ...................................................................................29

2.15.11 消隐使能 ................................................................................................................30

2.15.12 DPWM 模式 ..........................................................................................................30

2.15.13 DPWM 反相 ..........................................................................................................30

2.15.14 滤波器使能 (CLA_EN) .........................................................................................30

2.15.15 DPWM 使能 ..........................................................................................................30

2.16 DPWM 控制寄存器 1.............................................................................................30

2.16.1 周期计数器预置使能 ............................................................................................30

2.16.2 同步FET斜坡使能 .................................................................................................30

2.16.3 突发模式使能 ........................................................................................................31

2.16.4 电流/磁通量平衡占空比调整 ...............................................................................31.

2.16.5 同步输出分频因子选择 ........................................................................................31

2.16.6 滤波器标定 ............................................................................................................31

2.16.7 外部同步使能 ........................................................................................................31

2.16.8 逐周B侧激活使能 .................................................................................................31

2.16.9 自动模式切换使能 ................................................................................................31.

2.16.10 事件更新选择 ........................................................................................................31

2.16.11 检查闭锁 ..................................................................................................................32

2.16.12 全局周期使能 ..........................................................................................................32

2.16.13 DPWM管脚用作通用I/O .......................................................................................32

2.16.14 高分辨率使能/禁止 ...............................................................................................32

2.16.15 异步保护禁止 ........................................................................................................32

2.16.16 单帧使能 ................................................................................................................32

2.17 DPWM 控制寄存器 2.............................................................................................32

2.17.1 外部同步输入分频比 ..............................................................................................32

2.17.2 谐振死区补偿使能 ..................................................................................................32

2.17.3 滤波器占空比选择 ..................................................................................................33

2.17.4 DPWMB理想二极管仿真（IDE）使能 ................................................................33

2.17.5 采样触发 1 过采样 ................................................................................................33

2.17.6 采样触发 1 模式 ....................................................................................................33

2.17.7 采样触发使能位 ......................................................................................................33

2.18 周期和事件寄存器 ...................................................................................................33

2.19 相位触发寄存器 .......................................................................................................34

2.20 周期调整寄存器 .......................................................................................................34

2.21 谐振占空比寄存器 ...................................................................................................34

2.22 DPWM 故障控制寄存器 .........................................................................................34

2.23 DPWM 溢出寄存器 .................................................................................................34

2.24 DPWM 中断寄存器 .................................................................................................34

2.24.1 DPWM 周期中断位 ................................................................................................34

2.24.2 模式及切换中断位 ..................................................................................................34

2.24.3 中断位 ......................................................................................................................35

2.25 DPWM 计数器预置寄存器 .....................................................................................35

2.26 消隐寄存器 ...............................................................................................................35

2.27 DPWM 自适应采样寄存器 .....................................................................................35

2.28 DPWM 故障状态寄存器 .........................................................................................35

2.29 DPWM 自动切换寄存器 .........................................................................................35

2.30 DPWM 边沿 PWM 产生寄存器 ...........................................................................36

3 前端 ............................................................................................................................36

3.1 误差 ADC 和前端增益 .............................................................................................36

3.1.1 前端增益 ....................................................................................................................36

3.1.2 EADC 误差输出 .......................................................................................................37

3.1.3 EADC 触发、 EADC 输出到滤波器 ....................................................................38

3.1.4 EADC 时序 ...............................................................................................................38

3.1.5 EADC 平均 ...............................................................................................................38

3.1.6 使能 EADC 和前端 ...............................................................................................39

3.2 前端 DAC ...................................................................................................................40

3.3 斜坡模块 .....................................................................................................................41

3.3.1 DAC 斜坡概述 ..........................................................................................................41

3.3.2 DAC 斜坡启动和结束点 ..........................................................................................42

3.3.3 DAC 斜坡步长 ..........................................................................................................42

3.3.4 DAC 斜坡启动、中断、启动延时 ..........................................................................43

3.3.5 斜坡启动寄存器 ........................................................................................................43

3.3.6 当 EADC 饱和时 DAC 斜坡 .....................................................................................43

3.3.7 斜坡模块用于峰值电流模式 ....................................................................................43

3.3.8 同步FET软启动/关闭使用斜坡模块 ........................................................................43

3.4 逐次逼近模式 ...........................................................................................................44

3.4.1 逐次逼近控制参数......................................................................................................44

3.4.2 逐次逼近算法概述 ....................................................................................................44

3.4.3 非连续逐次逼近模式 ................................................................................................44

3.4.4 连续逐次逼近模式 ....................................................................................................44

3.5 绝对值没有逐次逼近 ...............................................................................................45

3.6 EADC模式 ................................................................................................................45

4 滤波器 ........................................................................................................................45

4.1 滤波器数学细节.........................................................................................................45

4.1.1 滤波器输入和分支计算 ............................................................................................45

4.1.2 比例分支 ....................................................................................................................46

4.1.3 积分分支 ....................................................................................................................46

4.1.4 微分分支 ....................................................................................................................46

4.1.5 相加、饱和、尺度和钳位 ........................................................................................47

4.1.6 滤波器输出级 ............................................................................................................47

4.2 滤波器状态寄存器 .....................................................................................................48

4.3 滤波器控制寄存器 .....................................................................................................48

4.3.1 滤波器使能 ................................................................................................................49

4.3.2 使用CPU采样 ............................................................................................................49

4.3.3 强制启动 ....................................................................................................................49

4.3.4 Kp关闭、Kd关闭、Ki关闭 ......................................................................................49

4.3.5 Kd 冻结, Ki 冻结l .....................................................................................................49

4.3.6 非线性模式 ................................................................................................................49

4.3.7 输出标定 ........ ...........................................................................................................49

4.3.8 输出乘数选择 ............................................................................................................49

4.3.9 开关周期作为输出乘数 ............................................................................................50

4.3.10 KComp作为输出乘数 .............................................................................................50

4.3.11 前馈作为输出乘数 ..................................................................................................50

4.3.12 周期乘数选择 ..........................................................................................................50

4.3.13 Ki 加法器模式 ........................................................................................................50

4.4 XN、YN读写寄存器 ................................................................................................51

4.4.1 CPU Xn 寄存器...........................................................................................................51

4.4.2 滤波器 XN 读寄存器.................................................................................................51

4.4.3 滤波器 YN 读寄存器 ...............................................................................................51

4.5 系数配置寄存器 .........................................................................................................51

4.6 Kp、Ki、和Kd 寄存器 ............................................................................................52

4.7 Alpha 寄存器 ............................................................................................................53

4.8 滤波器非线性限制寄存器 ..........................................................................................53

4.9 钳位寄存器 ..................................................................................................................53

4.10 滤波器预置寄存器 ......................................................................................................53

5 环路复用 .......................................................................................................................54

5.1 前端控制复用 (FECTRL0MUX, FECTRL1MUX, FECTRL2MUX) ..........................54

5.2 采样触发控制 (SAMPTRIGCTRL) ..............................................................................55

5.3 外部 DAC 控制 (EXTDACCTRL) ..............................................................................55

5.4 滤波器复用寄存器 (FILTERMUX) ..............................................................................55

5.5 滤波器 KComp 寄存器 (FILTERKCOMPx) ..............................................................55

5.6 DPWM 复用寄存器 (DPWMMUX) .............................................................................55

5.7 全局使能寄存器 (GLBEN) ...........................................................................................56

5.8 PWM 全局周期寄存器 (PWMGLBPRD) ...................................................................56

5.9 同步控制 (SYNCCTRL) ...............................................................................................56

5.10 轻负载（突发）模式 ..................................................................................................56

5.11 恒流/恒功率 .................................................................................................................56

5.12 模拟峰值电流模式 ........................................................................................................56

5.13 自动周期调整 ..............................................................................................................57

5.13.1 计算 ...........................................................................................................................57

5.13.2 配置 ...........................................................................................................................57

5.13.3 标定 ...........................................................................................................................58

6 故障复用 ...................................................................................................................58

6.1 模拟比较器配置 ....................................................................................................59

6.1.1 模拟比较器使能 .....................................................................................................59

6.1.2 模拟比较器门槛 .....................................................................................................59

6.1.3 模拟比较器极性 .....................................................................................................59

6.1.4 模拟比较器中断使能 .............................................................................................59

6.1.5 模拟比较器输出使能 .............................................................................................59

6.1.6 模拟比较器选择.......................................................................................................59

6.1.7 模拟比较器F参考电压选择.....................................................................................59

6.1.8 模拟比较器控制寄存器排列 .................................................................................59

6.2 模拟比较器斜坡 ....................................................................................................59

6.3 数字比较器配置 ....................................................................................................60

6.4 故障管脚配置 ........................................................................................................60

6.5 模拟峰值电流 ........................................................................................................60

6.6 故障状态寄存器 ....................................................................................................60

6.7 故障复用控制寄存器 ............................................................................................61

6.8 DPWM 故障动作 ..................................................................................................61

6.9 理想二极管仿真/非连续电流模式检测控制.......................................................62

6.10 振荡器失效检测 ....................................................................................................63

6.10.1 高频振荡器失效检测 .............................................................................................63

6.10.2 低频振荡器失效检测 .............................................................................................64

7 通用IO模式...............................................................................................................65

8 DPWM 0-3 Registers Reference ..................................................................................91

8.1 DPWM Control Register 0 (DPWMCTRL0) ............................................................... 91

8.2 DPWM Control Register 1 (DPWMCTRL1) ............................................................... 95

8.3 DPWM Control Register 2 (DPWMCTRL2) ............................................................... 98

8.4 DPWM Period Register (DPWMPRD) ........................................................................ 99

8.5 DPWM Event 1 Register (DPWMEV1) ....................................................................... 99

8.6 DPWM Event 2 Register (DPWMEV2) ..................................................................... 100

8.7 DPWM Event 3 Register (DPWMEV3) ..................................................................... 100

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