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TPIC44H01
4-Channel Serial/Parallel High-Side Pre-FET Driver
Independent On-State Over-CurrentDetection/Protection With Dynamic Fault
Threshold Independent Off-State Open-Load
Detection Supply Over-Voltage Lockout Protection Asynchronous Open-Drain Fault Interrupt
Terminal to Flag Fault Conditions. Output
Can be OR’ed With Multiple Devices Encoded Fault Status Reporting Through
Serial Output Terminal (2-Bits Per Channel) Programmable On-State Fault Deglitch
Timers High Impedance CMOS Compatible Inputs
With Hysteresis Fault Mode Selection: Outputs Latched Off
or Switched at Low Duty Cycle Device Can be Cascaded With Serial
Interface
descriptionThe TPIC44H01 is a four channel high-side pre-FET driver which provides serial or parallel input interface to
control four external NMOS power FETs. It is designed for use in low frequency switching applications for
resistive or inductive loads, including solenoids and incandescent bulbs.
Each channel has over-current, short-to-ground, and open-load detection that is flagged through the FLT pin
and distinguished through the serial interface. Over-current thresholds are set through the V(PK_x) and
V(COMP1-4) pins. Short-to-ground and open-load thresholds are set internally to approximately 2.5 V. The
AR_ENBL pin is used to define the operation of the device during a fault condition, allowing the outputs to either
latch off or to enter a low duty cycle, auto-retry mode. An over-voltage lockout circuit on V(PWR) protects the
device and the external FET s. A low current sleep state mode is provided to allow the TPIC44H01 to be used
in applications where V(PWR) is connected directly to the battery. An internal charge pump allows the use of
N-channel FETs for high-side drive applications, while current-limit gate drive provides slope control for reduced
RFI.
By having the unique ability to develop a dynamic over-current threshold, the TPIC44H01 can be used to drive
incandescent bulbs with long inrush currents without falsely flagging a fault. Likewise, the user can select an
internally set over-current threshold of ~1.25 V by pulling the respective V(COMP1-4) pin to VCC.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SCLK
AR_ENBL
GND
IN1
IN2
IN3
IN4
VCC (PK_A)
V(PK_B)
V(COMP1) (COMP2)
V(COMP3)
CP2
V(CP)
GATE1
SRC1
GATE2
SRC2
GATE3
SRC3
GATE4
SRC4
FLT
RESET
V(COMP4)
