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TPIC44H01 Datasheet(PDF) 1 Page - Texas Instruments |
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TPIC44H01 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 32 page 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 © 1998, Texas Instruments Incorporated 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. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 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 (TOP VIEW) |
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