收藏本站
PIC18F/LF1XK50
DS41350E-page 132
Preliminary
2010 Microchip Technology Inc.
14.4.6
PROGRAMMABLE DEAD-BAND
DELAY MODE
In Half-Bridge applications where all power switches
are modulated at the PWM frequency, the power
switches normally require more time to turn off than to
turn on. If both the upper and lower power switches are
switched at the same time (one turned on, and the
other turned off), both switches may be on for a short
period of time until one switch completely turns off.
During
this
brief
interval,
a
very
high
current
(shoot-through current) will flow through both power
switches, shorting the bridge supply. To avoid this
potentially destructive shoot-through current from
flowing during switching, turning on either of the power
switches is normally delayed to allow the other switch
to completely turn off.
In
Half-Bridge
mode,
a
digitally
programmable
dead-band delay is available to avoid shoot-through
current from destroying the bridge power switches. The
delay occurs at the signal transition from the non-active
state to the active state. See Figure 14-14 for
illustration. The lower seven bits of the associated
PWM1CON register (Register 14-3) sets the delay
period in terms of microcontroller instruction cycles
(TCY or 4 TOSC).
FIGURE 14-14:
EXAMPLE OF
HALF-BRIDGE PWM
OUTPUT
FIGURE 14-15:
EXAMPLE OF HALF-BRIDGE APPLICATIONS
Period
Pulse Width
td
(1)
P1A(2)
P1B(2)
td = Dead-Band Delay
Period
(1)
Note 1:
At this time, the TMR2 register is equal to the
PR2 register.
2:
Output signals are shown as active-high.
P1A
P1B
FET
Driver
FET
Driver
V+
V-
Load
+
V
-
+
V
-
Standard Half-Bridge Circuit (“Push-Pull”)
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
PIC16CR76T-I/SO IC PIC MCU 8KX14 28SOIC
PIC18LF24K22-I/MV IC PIC MCU 16KB FLASH 28UQFN
PIC18LF24K22-I/ML IC PIC MCU 16KB FLASH 28QFN
PIC16CR76T-I/ML IC PIC MCU 8KX14 28QFN
PIC16F627-04/P IC MCU FLASH 1KX14 COMP 18DIP
PIC18F45J10-I/ML IC PIC MCU FLASH 16KX16 44QFN
PIC18F24K22-I/ML IC PIC MCU 16KB FLASH 28QFN
PIC16CR76-I/SS IC PIC MCU 8KX14 28SSOP
相关代理商/技术参数
PIC18F13K50-I/P 制造商:Microchip Technology Inc 功能描述:20 Pin 8 KB Flash 512 RAM 15 I/O 10
PIC18F13K50-I/SO 功能描述:8位微控制器 -MCU 8KB Flash 512 RAM 15 I/O 10-B ADC USB 2.0 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F13K50-I/SO 制造商:Microchip Technology Inc 功能描述:20 Pin 8 KB Flash 512 RAM 15 I/O 10
PIC18F13K50-I/SS 功能描述:8位微控制器 -MCU 8KB Flash 512 RAM 15 I/O 10-B ADC USB 2.0 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F13K50-I/SS 制造商:Microchip Technology Inc 功能描述:8-Bit Microcontroller IC
PIC18F13K50T-I/SO 功能描述:8位微控制器 -MCU 8KB Flash 512 RAM 15 I/O 10-B ADC USB 2.0 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F13K50T-I/SS 功能描述:8位微控制器 -MCU 8KB Flash 512 RAM 15 I/O 10-B ADC USB 2.0 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F14K22-E/ML 功能描述:8位微控制器 -MCU 16KBFlash 512byteRAM 256bytesEEPROM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT