mc33931 Freescale Semiconductor, Inc, mc33931 Datasheet - Page 13

• Manufacturer Part Number: mc33931
• Description: 5.0 A Throttle Control H-bridge
• Manufacturer: Freescale Semiconductor, Inc

ANALOG CONTROL AND PROTECTION
CIRCUITRY:
The charge pump provides gate drive for the H-bridge
MOSFETs. The Current and Temperature sense circuitry
provides detection and protection for the output drivers.
Output under-voltage protection shuts down the MOSFETS.
GATE CONTROL LOGIC:
primarily for any low-voltage DC servo motor control
application within the current and voltage limits stated for the
device. Two independent inputs provide polarity control of
Analog Integrated Circuit Device Data
Freescale Semiconductor
An on-chip voltage regulator supplies the internal logic.
The 33931 is a monolithic H-bridge Power IC designed
33931
INTERFACE
MCU
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
ANALOG CONTROL AND PROTECTION
CURRENT SENSE
TEMPERATURE
Figure 10. Functional Internal Block Diagram
COMMAND AND FAULT REGISTERS
SENSE
PROTECTION LOGIC CONTROL
GATE CONTROL LOGIC
PWM CONTROLLER
REGULATION
two half-bridge totem-pole outputs. Two independent disable
inputs are provided to force the H-bridge outputs to tri-state
(high-impedance off-state).
H-BRIDGE OUTPUT DRIVERS: OUT1 AND OUT2
from OUT1 to OUT2 is reversible and under full control of the
user by way of the Input Control Logic. The output stage is
designed to produce full load control under all system
conditions. All protective and control features are integrated
into the Control and Protection blocks. The sensors for
current and temperature are integrated directly into the
output MOSFET for maximum accuracy and dependability.
VOLTAGE
CHARGE
The H-bridge is the power output stage. The current flow
PUMP
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
OUTPUT DRIVERS
OUT1 - OUT2
H-BRIDGE
FUNCTIONAL DESCRIPTION
33931
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