MC33926 Datasheet
Table Of Contents
- 5.0 A Throttle Control H-Bridge
- Figure 1. 33926 Simplified Application Diagram
- Internal Block Diagram
- Pin Connections
- Electrical Characteristics
- Table 2. Maximum Ratings
- Table 3. Static Electrical Characteristics
- Table 4. Dynamic Electrical Characteristics
- Figure 4. Output Delay Time
- Figure 5. Disable Delay Time
- Figure 6. Output Switching Time
- Figure 7. Current Limit Blanking Time and Constant-OFF Time
- Figure 8. Short-circuit Detection Turn-OFF Time tFAULT
- Figure 9. Output Current Limiting Foldback Region
- Functional Description
- Functional Internal Block Description
- Functional Device operation
- Typical applications
- Packaging
- Additional Documentation
- Table 6. Thermal Performance Comparison
- Figure 15. Surface Mount for Power PQFN with Exposed Pads
- Figure 16. Thermal Test Board
- Table 7. Thermal Resistance Performance
- Figure 17. Device on Thermal Test Board RqJA
- Figure 18. Transient Thermal Resistance RqJA, 1.0 W Step response, Device on Thermal Test Board Area A = 600 (mm2)
- Revision History
Analog Integrated Circuit Device Data
14 Freescale Semiconductor
33926
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
Figure 10. Functional Internal Block Diagram
ANALOG CONTROL AND PROTECTION
CIRCUITRY:
The on-chip voltage regulator supplies 3.3 V to the internal
logic. 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:
The 33926 is a monolithic H-Bridge Power IC designed
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
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
The H-Bridge is the power output stage. The current flow
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.
MCU
INTERFACE
33926
PROTECTION LOGIC CONTROL
COMMAND AND FAULT REGISTERS
GATE CONTROL LOGIC
CURRENT SENSE
VOLTAGE
REGULATION
TEMPERATURE
SENSE
CHARGE
PUMP
H-BRIDGE
OUTPUT DRIVERS
OUT1 - OUT2
ANALOG CONTROL AND PROTECTION
PWM CONTROLLER