TPS2HC08-Q1 - 9.5mΩ Dual Smart High-Side Switch | TI
MPN: TPS2HC08-Q1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.15 | $2.15 |
| 10 | $1.93 | $19.30 |
| 100 | $1.62 | $162.00 |
| 500 | $1.38 | $690.00 |
| 1,000 | $1.12 | $1,120.00 |
TPS2HC08-Q1 Overview
A smart high-side switch is a power management IC that connects a load to the positive supply rail while integrating protection and diagnostic functions such as current limiting, thermal shutdown, and open-load detection. It replaces discrete MOSFET-plus-driver circuits, simplifying design and improving reliability. In the power management hierarchy, it sits above basic load switches, adding the robust protection and fault reporting demanded by automotive loads.
Key features include an operating supply range suited to 12V battery systems during cranking and transient events, an integrated charge pump that ensures low RDS(on) without external components, and low standby quiescent current for battery-connected modules. Protection covers output short circuit, overcurrent, and overtemperature conditions, supporting functional-safety-oriented designs.
Architecturally, the TPS2HC08-Q1 combines two NMOS power stages with gate-drive charge pump and protection logic in a compact 11-pin VQFN-HR (2.2x3.6mm) package. The device is AEC-Q100 qualified. Serial diagnostic reporting enables real-time load monitoring with automotive MCUs such as the TI TMS320F280015x or MSPM0 families.
Typical applications include automotive body control modules, LED lighting drivers, and actuator drives such as relays, solenoids, and motors, where integrated diagnostics detect wire faults and load failures.
For reliable operation, provide adequate PCB copper area under the package at high currents, place decoupling capacitors close to the supply pins, and follow the datasheet layout guidance to minimize parasitic inductance during short-circuit events.
Drop-in alternatives for TPS2HC08-Q1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS2HC10-Q1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS2HC03-Q1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS1HC10-Q1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS2HC08-Q1 Maximum Ratings & Electrical Characteristics
| Topology | Dual-channel high-side switch |
| Channel Configuration | 2 x 1:1 N-Channel |
| On-Resistance (RDS(on)) | 9.5 mΩ |
| Max Continuous Output Current (both channels) | 7.5 A DC |
| Max Continuous Output Current (single channel) | 10 A DC |
| Current Limit Rating | 25 A |
| Target System | 12 V automotive battery |
| Integrated FET | NMOS power FET with charge pump |
| Control Interface | Parallel (EN/digital inputs) |
| Diagnostics | Load current sense, open-load, short-circuit, overtemperature |
| Qualification | AEC-Q100 (automotive) |
| Package | 11-VQFN-HR (2.2 mm x 3.6 mm) |
| Mounting Type | Surface Mount |
| Protection Features | Overcurrent, short circuit, overtemperature |
| RoHS Status | Compliant |
TPS2HC08-Q1 Pin Configuration
| Pin 1 | VS — Battery supply input for internal logic and charge pump |
| Pin 2 | GND — Ground reference |
| Pin 3 | EN1 — Channel 1 enable input |
| Pin 4 | EN2 — Channel 2 enable input |
| Pin 5 | OUT1 — Channel 1 high-side switch output |
| Pin 6 | OUT2 — Channel 2 high-side switch output |
| Pin 7 | ILIM — Current limit adjustment |
| Pin 8 | -diag/STATUS — Diagnostic/fault status output |
| Pin 9 | VCP — Charge pump output (internal gate drive) |
| Pin 10 | CS/ISENSE — Current sense output for load monitoring |
| Pin 11 | PAD — Exposed thermal pad - connect to GND plane |
Safe Operating Area
Typical Applications
TPS2HC08-Q1 is suitable for 6 applications: Automotive Body Control Modules, Automotive LED Lighting Drivers, Actuator and Relay Coil Drives, Power Distribution and Load Switching, Heater and Resistive Load Control, Evaluation and Prototyping Platform.
Automotive Body Control Modules
In body control modules (BCM), the TPS2HC08-Q1 switches resistive and inductive loads such as lamps, relays, and pumps from the 12V battery rail. Its dual channels independently drive two loads, while the 9.5mΩ on-resistance keeps conduction losses low at multi-amp currents. Integrated open-load and short-circuit diagnostics report wire faults to the BCM microcontroller, supporting OEM diagnostic requirements without external sense circuitry, and AEC-Q100 qualification covers the automotive temperature environment.
Recommended
Automotive LED Lighting Drivers
The TPS2HC08-Q1 drives exterior and interior LED lighting loads where open-load detection is required to flag failed lamps. Each channel switches LED strings from the 12V rail at up to 7.5A total; the low 9.5mΩ RDS(on) minimizes self-heating in sealed lamp assemblies. Short-circuit protection limits current during harness faults, and the compact 2.2x3.6mm VQFN-HR fits dense lighting driver boards alongside linear LED drivers such as TPS92691-Q1.
Recommended
Actuator and Relay Coil Drives
Solenoids, motors, and relay coils in automotive modules draw inductive currents that the TPS2HC08-Q1 handles with integrated clamp and protection behavior. The 10A single-channel rating covers demanding actuators, while per-channel current sensing lets the MCU detect stalled or jammed actuators via current signatures. The integrated NMOS with charge pump removes gate-drive design work, and AEC-Q100 qualification plus fault latching support reliable operation across cranking voltage transients.
Recommended
Power Distribution and Load Switching
As an electronic fuse (eFuse) style load switch, the TPS2HC08-Q1 distributes 12V power to module sub-loads with overcurrent limiting and thermal shutdown replacing blown-fuse service events. The 25A current limit rating provides robust short-circuit response, and fault flags enable safe re-try sequencing controlled by the host. Compared to discrete MOSFET plus driver chains, the integrated solution shrinks board area and improves fault diagnostics for zonal power architectures.
Recommended
Heater and Resistive Load Control
Seat, mirror, and sensor heaters are resistive loads well matched to the TPS2HC08-Q1's strengths: continuous multi-amp DC current (up to 7.5A dual-channel), low 9.5mΩ conduction loss, and overtemperature shutdown protecting against heater shorts. Per-channel current-sense output enables closed-loop heater power reporting to the climate or body controller. The automotive-qualified VQFN-HR package dissipates heat efficiently with modest PCB copper under the exposed pad.
Recommended
Evaluation and Prototyping Platform
TI's 2HC08-MOD-EVM expansion board provides a ready platform for evaluating TPSxHCxx-Q1 smart high-side switches, including the TPS2HC08-Q1. Engineers can characterize RDS(on), current-limit behavior, and diagnostic fault reporting against real automotive loads before committing to PCB layout. Pairing the EVM with a C2000 or MSPM0 MCU launchpad demonstrates full MCU-controlled switching and fault handling for power distribution proof-of-concept designs.
Recommended
Recommended Products Summary
Engineering reference data for TPS2HC08-Q1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS2HC10-Q1 | TPS2HCS08AQPWPRQ1 | TPS4H000-Q1 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 11-VQFN-HR (2.2x3.6mm) | 11-VQFN-HR (2.2x3.6mm) - same family | HTSSOP-16 (PWP) | HTSSOP (PWP) |
| Channels | 2 (high-side) | 2 (high-side) | 2 (high-side) | 4 (high-side) |
| Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
| Pin-Compatible Drop-In | - | Yes (same VQFN-HR family) | No (different package) | No (different package) |
Key Differentiators
- Lowest conduction loss in its current class (vs TPS2HC03-Q1 family trade-off)
- Dual-channel integration in 2.2x3.6mm (vs TPS1HC10-Q1)
- Parallel control simplicity vs SPI diagnostics (vs TPS2HCS08AQPWPRQ1)
Design Notes
At 7.5A total load across two channels, conduction loss is roughly I^2 x R = 7.5^2 x 0.0095 ≈ 0.53W. The compact 2.2x3.6mm VQFN-HR relies on the exposed pad for heat extraction - provide at least 4-6 square cm of grounded copper pour with thermal vias to the inner plane. Verify junction temperature against the datasheet thermal impedance at your worst-case ambient for continuous loads.
Minimize parasitic inductance in the VS-OUT power loop to limit voltage spikes during short-circuit turn-off events. Route high-current paths as short, wide traces (at least 2oz copper recommended at 10A single-channel), and place a 100nF ceramic decoupling capacitor directly at VS with a bulk capacitor per module. Connect the exposed pad solidly to the GND plane.
The TPS2HC08-Q1 (parallel EN control) is frequently confused with the SPI-controlled TPS2HCS08-Q1 - they are not interchangeable and use different packages. Confirm diagnostics wiring: current-sense output scaling must match the MCU ADC range, and open-load detection behavior depends on the load type (resistive vs LED). Consult the TI datasheet layout and application sections before finalizing fault thresholds.
Compliance Information
AEC-Q100 automotive qualification per TI Q1 designation. RoHS/lead-free status per standard TI automotive product offering; verify on TI product page for certificate details.
