4-Channel Serial-In Parallel-In Low-Side

Pre-FET Driver

Devices Are Cascadable

Internal 55-V Inductive Load Clamp and

VGS Protection Clamp for External Power

FETs

Independent Shorted-Load/Short-to-

Battery Fault Detection on All Drain

Terminals

Independent OFF-State Open-Load Fault

Sense

Over-Battery-Voltage Lockout Protection

and Fault Reporting

Under-Battery Voltage Lockout Protection

for the TPIC44L01 and TPIC44L02

Asynchronous Open-Drain Fault Flag

Device Output Can Be Wire-ORed With

Multiple Devices

Fault Status Returned Through Serial

Output Terminal

Internal Global Power-On Reset of Device

and External RESET Terminal

High-Impedance CMOS-Compatible Inputs

With Hysteresis

TPIC44L01 and TPIC44L03 Disables the

Gate Output When a Shorted-Load Fault

Occurs

TPIC44L02 Transitions the Gate Output to a

Low-Duty Cycle PWM Mode When a

Shorted-Load Fault Occurs

description

The TPIC44L01, TPIC44L02, and TPIC44L03 are

low-side predrivers that provide serial and parallel

input interfaces to control four external FET power

switches such as offered in the TI TPIC family of

power arrays. These devices are designed

primarily for low-frequency switching, inductive

load applications such as solenoids and relays.

Fault status for each channel is available in a

serial-data format. Each driver channel has

independent off-state open-load detection and

on-state shorted-load/short-to-battery detection.

Battery overvoltage and undervoltage detection

and shutdown is provided on the TPIC44L01/L02.

On the TPIC44L03 driver, only over-battery

voltage shutdown is provided. Each channel also

provides inductive-voltage-transient protection

for the external FET.

These devices provide control of output channels through a serial input interface or a parallel input interface.

A command to enable the output from either interface enables the respective channels gate output to the

external FET. The serial interface is recommended when the number of signals between the control device and

the predriver must be minimized and the speed of operation is not critical. In applications where the predriver

must respond very quickly or asynchronously, the parallel input interface is recommended.

For serial operation, the control device must transition CS from high to low to activate the serial input interface.

When this occurs, SDO is enabled, fault data is latched into the serial interface, and the fault flag is refreshed.