Drivven, Inc.
Throttle Driver Module Kit
© Drivven, Inc. 2009
• Throttle Driver Module Kit User’s Manual • D000017 • Rev B
8
H-Bridge Drivers
The Electronic Throttle Driver Module Kit provides a CompactRIO (cRIO) module for driving
passenger car electronic throttle bodies up to 70mm in diameter. A typical example of electronic
throttle bodies which this module is capable of driving is the Bosch DV-E5 series which range
from 32mm to 68mm in diameter. However, the module is capable of driving most other
electronic throttle bodies within that size range.
Each h-bridge circuit is capable of driving 3A continuously and 6A peak. It provides current
sensing feedback as well as over-current and over-temp protection. In the case of a short circuit
where 10A is exceeded, or a temperature of 140 C is exceeded within the driver FETs, a fault flag
will be generated and the circuit will shutdown until the fault condition is removed. However,
Drivven recommends monitoring the current and temperature values and disabling the circuit
programmatically if current exceeds 6A or the internal module temperature exceeds 85 C. The
temperature is automatically monitored within the throttle_rt_control.vi.
Each h-
bridge circuit automatically eliminates “shoot-through” current and provides internal clamp
diodes for inductive loads.
Analog Inputs
The Electronic Throttle Driver Module provides two external analog inputs for accepting 0-5V
signals. The primary purpose of these inputs is for measuring potentiometer voltages. A
regulated 5V output and ground terminal is provided for powering the potentiometer(s) of an
electronic throttle body.
Warning: The 5V output is not protected against short circuit to higher voltage sources.
Do not short this terminal to the H-Bridge driver terminals or BATT terminal.
Other analog signals are also measured internal to the module and reported by the supplied VIs.
All measured analog signals are listed below:
Battery Voltage (V)
H-Bridge 1 Current (A)
H-Bridge 2 Current (A)
H-Bridge 1 Fault Line (reported with boolean, T=Fault, F=No Fault)
H-Bridge 2 Fault Line (reported with boolean, T=Fault, F=No Fault)
External Analog Input 1 (0-5V, Screw Terminal 6)
External Analog Input 2 (0-5V, Screw Terminal 7)
Internal Module Temperature
All eight analog inputs are sampled with a single multiplexed A/D converter at an aggregate rate
of 17.84 KHz. Therefore each analog signal is sampled at 2.23 KHz. The A/D result can be used
directly at the FPGA level in ADC counts, or at the RT level in converted engineering units.
The external analog inputs are protected from -6V to +12V inputs.
The external analog inputs are independent from throttle control algorithms, and may be used in
any manner the user deems necessary. The intended purpose of the external analog inputs is for
the convenience of connecting all wires of an electronic throttle directly to the module. Then the
