Global Sources
EE Times-Asia
Stay in touch with EE Times Asia

( File format: PDF, 482 KB )
4-Channel Serial And Parallel High-Side Pre-Driver
Texas Instruments

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.
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 TI is a trademark of Texas Instruments Incorporated.

Related Datasheets
Part Number Description Category
? ?BQ24032A Single-Chip Charge and System Power-Path Management IC (bqTINY-III) (Rev. G) ICs, Interface
? ?CC1100 Single-Chip Low Cost Low Power RF-Transceiver (Rev. B) ICs, Power Management
? ?PTN78020W 6-A Wide-Input Voltage Adjustable Switching Regulator (Rev. A) ICs, Interface
? ?TPS54110 3-V to 6-V Input, 1.5-A Output Synchronous-Buck PWM Switcher (Rev. B) ICs, Interface
? ?TPS5430 3-A Wide Input Range Step-Down Swift(TM) Converter (Rev. C) ICs, Interface
? ?TPS5450 5-A Wide Input Range Step-Down Swift(TM) Converter ICs, Interface
? ?TPS54672 Tracking/Termination Synchronous PWM Switcher w/ Integrated FETS (Swift) (Rev. C) ICs, Interface
? ?TPS62200 High Efficiency, SOT23 Step-Down, DC-DC Converters (Rev. E) ICs, Interface
? ?UCD7230 Digital Control Compatible Synchronous Buck 4-A Drivers with Current Sense Condi (Rev. C) ICs, Interface

As the hyperlinked contents/websites are those of third parties, we cannot vouch for their accuracy or legitimacy.
Interviews & Viewpoints


Learn how senior executives are seeing the industry from interviews and contributed opinions.

Bloggers Say

Bloggers Say

See what engineers like you are posting on our pages.

Back to Top