The TPIC7218-Q1 device integrates in single package several
functions needed in ABS and ESC electronic control units (ECU). This integration coupled with the
minimization of the external components saves valuable ECU board space.
The TPIC7218-Q1 device is an antilock braking controller capable of directly driving
eight solenoid valves with internal high-current low-side drivers. Low-side drivers configured for
digital control do not require external voltage clamps. The TPIC7218-Q1 device has gate drive
capability for two high-side N-Channel MOSFETs that can be used to drive a pump motor and power to
all solenoids. The TPIC7218-Q1 device provides a fault-tolerant interface for both Intelligent and
Active wheel-speed sensors to an external microprocessor. The TPIC7218-Q1 device can be used with
either 3.3- or 5-V microprocessors and uses a standard SPI (Serial-Peripheral Interface).
The TPIC7218-Q1 device has two internal open-drain warning lamp drivers that can be
pulled up to battery voltage, as well as one low-voltage driver. An internal state machine monitors
a watchdog input and reports faults on a warning-lamp pin and SPI register. A K-Line transceiver is
also included. A multitude of safety and fault monitoring functionality supervise both system and
TPIC7218-Q1 circuits. Faults must be polled and reset over SPI. The TPIC7218-Q1 device is designed
for use in harsh automotive environments, capable of withstanding high operating temperatures and
electrically noisy signals and power. Short-to-ground, short-to-battery, and open-load conditions
are tolerated and monitored. The TPIC7218-Q1 device also exhibits outstanding Electro-Magnetic
Compatibility (EMC) performance.
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