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33899 Datasheet(PDF) 18 Page - Freescale Semiconductor, Inc

Part # 33899
Description  Programmable H-Bridge Power IC
PDF  26 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

33899 Datasheet(HTML) 18 Page - Freescale Semiconductor, Inc

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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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