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1. Describe
The TPS4H160BQPWPRQ1 device is an intelligent high-side switch that integrates an internal charge pump and quad NMOS power FETs. Comprehensive diagnostics and high-accuracy current sensing capabilities enable intelligent control of loads. The adjustable current limiting function greatly improves the reliability of the whole system. The device is available in two versions with different diagnostic reports, an open-drain digital output and a current-sense analog output. For Revision A, the device uses an open-drain structure for digital fault reporting. In the event of a fault, the device pulls STx down to GND. An external pull-up resistor of 3.3V or 5V is required to match the power level of the microcontroller. The digital state of each channel can be reported individually or globally by connecting the STx pins together. For version B, high-accuracy current sensing enables more accurate diagnostics without the need for further calibration. The integrated current mirror provides a load current of 1 / K(CS). The mirror current flows into the CS pin resistor as a voltage signal. K(CS) is a constant value across temperature and supply voltage. A wide linear region from 0 V to 4 V enables better real-time load current monitoring. The CS pin can also report faults through the pull-up voltage of VCS(H). An external high precision current limit allows the application to set the current limit value. The device improves system reliability by effectively clamping inrush current in the event of overcurrent. The device can also save the system cost stage by reducing the size of PCB traces and connectors and the capacity of the pre-stage power supply. In addition, the device implements an internal current limit with a fixed value. For inductive loads (relays, solenoids, valves), the device implements an active clamp between drain and source protect yourself. During the inductive off cycle, energy from both the supply and the load is dissipated in the high-side switch. The device also optimizes the turn-off slew rate during active clamping, aiding system design by minimizing the effects of transient power and EMI. The TPS4H160-Q1 device is an intelligent high-side switch suitable for a variety of resistive, inductive, and capacitive loads, including low-power light bulbs, LEDs, relays, solenoids, heaters, and submodules.
2. Feature
1. Compliant with automotive application requirements
2. AEC-Q100 certified with the following results:
– Device temperature grade 1: –40°C to 125°C ambient operating temperature range
– Device HBM ESD classification level H3A
– Equipment CDM ESD classification level C4B
3. Functional safety capabilities
– Documentation available to aid in functional safety system design
4. Quad 160mΩ smart high-side switch with full diagnostics
– Version A: Open-drain digital output
– Version B: Current sense analog output
5. Wide operating voltage from 3.4 V to 40 V
6. Ultra-low standby current, < 500 nA
7. Accurate current sense: ±15% at >25mA load
8. Adjustable current limit with external resistor, ±15% at >500 mA load
9. Protect
– Short-circuit-to-ground protection via current limiting (internal or external)
– Thermal shutdown with latch option and thermal swing
– Inductive load negative voltage clamp with optimized slew rate
– Loss of ground and loss of battery protection
10. Diagnostics
– Overcurrent and short-to-ground detection
– Open load and short-to-battery detection
– Rapidly interrupting global fault reporting
11. 28-pin thermally enhanced PWP package
3. Application
1. Multi-channel LED driver, bulb driver
2. Multi-channel high-side switch for submodules
3. Multi-channel high-side relay, solenoid driver
4. PLC digital output driver
4. Pin configuration
5. Application Information
The TPS4H160BQPWPRQ1 device is capable of driving a variety of resistive, inductive, and capacitive loads, including low-power light bulbs, LEDs, relays, solenoids, heaters, and submodules. Complete diagnostics and high-accuracy current sensing capabilities enable intelligent control of the load. An externally adjustable current limit Improve overall system reliability by clamping inrush or overload currents.
