參數(shù)資料
型號: PC33899CVW
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 運動控制電子
英文描述: BRUSH DC MOTOR CONTROLLER, PDSO30
封裝: ROHS COMPLIANT, HSOP-30
文件頁數(shù): 10/26頁
文件大?。?/td> 990K
代理商: PC33899CVW
Analog Integrated Circuit Device Data
18
Freescale Semiconductor
33899
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
INTRODUCTION
The PWM input is connected to the system
microprocessor and provides for control of the four MOSFET
outputs. The PWM duty cycle range is 0% to 100%; however,
open load detection circuits require a minimum off-time.
The 33899 holds all outputs off if both FWD and REV are
either logic [0]s or logic [1]s. Figure 12 depicts inputs versus
outputs in forward mode operation.
Figure 12. 33899 Operation in Forward Mode
Load
Current
PWM
INPUT
M1 GATE
M2 GATE
M3 is “ON”
M4 is “OFF”
S0
VIGNP + VF
RDS(ON) * ILOAD
VIGNP -
RDS(ON)* ILOAD
Dead
Time
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