TPS40422RHAR

TPS40422RHAR is a Texas Instruments hot-swap controller. It sits on a supply rail and drives an external N‑MOSFET to protect a board or module during insertion and operation.
How it works:
- Monitors input voltage and current, and limits inrush/current to a preset value.
- Controls a pass device to provide soft-start and protect against short circuits.
- Includes undervoltage/overcurrent protection and a fault/flag output.
Key features (typical):
- Adjustable current limit via external sense resistor.
- Programmable soft-start to minimize inrush.
- UVLO and overcurrent/short-circuit protection.
- Fault indication with reset/latch behavior.
- Designed to work with an external MOSFET for hot-swapping.
Typical applications:
- Hot-swappable server/backplane modules, telecom equipment, storage/industrial power rails.
Package note:
- RHAR denotes TI’s package/temperature option for TPS40422 (e.g., specific 8-pin package and temperature range). For exact pinout, electrical specs, and recommended layouts, consult the TPS40422 datasheet and packaging description.

TPS40422RHAR is a high‑side hot‑swap controller for a single supply rail (requires external N‑MOSFET and sense resistor). Key features include:
- Wide input range up to 60 V
- Adjustable current limit via sense resistor
- Slew‑rate limited turn‑on and programmable soft‑start to limit inrush
- Inrush control during turn‑on
- Overcurrent/short‑circuit protection with hiccup
- Overvoltage protection
- Undervoltage lockout
- Thermal shutdown with latch
- Enable input and fault/status output (open‑drain) for MCU signaling
- Internal fault latch for safe reset
- Small 8‑pin RHAR package
Note: External MOSFET and sense resistor are required. For exact electrical specs and pinout, consult the TPS40422RHAR datasheet.

- Pin count: 20 pins (RHAR package)
- Function: Dual-channel hot-swap/current-limit controller used to protect and supervise power rails (with over/under voltage protection and fault/status signaling).

- Manufacturer: Texas Instruments (TI)
- What kind of company: TI is an American multinational semiconductor company that designs, manufactures, and sells analog and embedded processing integrated circuits, among other devices; one of the largest global semiconductor producers.

TPS40422RHAR is a dual-channel hot-swap controller with rail sequencing for multi-rail power systems. Typical applications:
- Server, data-center, and workstation VRMs needing hot-swap protection, inrush control, and two-rail sequencing
- Networking and telecom equipment (switches, base stations) with multiple supply rails
- Storage systems and embedded racks requiring controlled power-up/down across rails
- Industrial and medical equipment needing safe insertion/removal and fault-tolerant rails
- Power modules and DC-DC converter boards that require programmable sequencing for CPU/GPU rails

TPS40422RHAR uses TI’s VQFN-16 package (leadless), 4 mm × 4 mm (RHA code).