TPIC44H01 - 4 通道串联/并联高端前置 FET 驱动器

TPIC44H01是TI德州仪器公司的一款由接口控制的前FET驱动器产品，TPIC44H01是4 通道串联/并联高端前置 FET 驱动器，本站介绍了TPIC44H01的封装应用图解、特点和优点、功能等，并给出了与TPIC44H01相关的TI元器件型号供参考。

TPIC44H01 - 4 通道串联/并联高端前置 FET 驱动器 - 由接口控制的前FET驱动器 - 电源管理特殊功能 - 德州仪器

产品描述

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.

The 8-bit serial peripheral interface (SPI) allows the user to command any of the four outputs on or off, to program one of eight possible open-load, over-current, and short-load fault deglitch timer settings, and to engage the sleep state. Data is clocked into the SDI pin on the rising edge of SCLK and clocked out of the SDO pin on the SCLK falling edge. The serial input bits are logic OR'ed with the IN1-IN4 parallel inputs pins. The serial interface is also used to read normal-load, open-load, over-current, and short-to-ground conditions for each channel. Over-voltage lockout can be detected when the FLT\ pin is low and no bits are set in the SDO register. Multiple TPIC44H01 devices may be cascaded together using the serial interface to further reduce I/O lines from the host controller.

产品特性

Serial or Parallel Control of Gate Outputs
Sleep State for Low Quiescent Current
Independent On-State Source Short-to-Ground (Shorted-Load) Detection/Protection
Independent On-State Over-Current Detection/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

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