TPIC44H01_15 datasheet(1/32 Pages) TI1

Part #	TPIC44H01

Description	4-CHANNEL SERIAL AND PARALLEL HIGH-SIDE PRE-FET DRIVER

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TPIC44H01

4-CHANNEL SERIAL AND PARALLEL HIGH-SIDE PRE-FET DRIVER

SLIS088 – SEPTEMBER 1998

1

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

D Serial or Parallel Control of Gate Outputs

D Sleep State for Low Quiescent Current

D Independent On-State Source

Short-to-Ground (Shorted-Load)

Detection/Protection

D Independent On-State Over-Current

Detection/Protection With Dynamic Fault

Threshold

D Independent Off-State Open-Load

Detection

D Supply Over-Voltage Lockout Protection

D Asynchronous Open-Drain Fault Interrupt

Terminal to Flag Fault Conditions. Output

Can be OR’ed With Multiple Devices

D Encoded Fault Status Reporting Through

Serial Output Terminal (2-Bits Per Channel)

D Programmable On-State Fault Deglitch

Timers

D High Impedance CMOS Compatible Inputs

With Hysteresis

D Fault Mode Selection: Outputs Latched Off

or Switched at Low Duty Cycle

D Device Can be Cascaded With Serial

Interface

description

The 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 FETs. 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.

Copyright

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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.

TI is a trademark of Texas Instruments Incorporated.

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CS

SD0

SDI

SCLK

AR_ENBL

GND

IN1

IN2

IN3

IN4

VCC

V(PK_A)

V(PK_B)

V(COMP1)

V(COMP2)

V(COMP3)

PGND

V(PWR)

CP1

CP2

V(CP)

GATE1

SRC1

GATE2

SRC2

GATE3

SRC3

GATE4

SRC4

FLT

RESET

V(COMP4)

DA PACKAGE

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