STMicroelectronics IPS161HFTR

Overview

IPS161HFTR from STMicroelectronics is a monolithic 60 V, 60 mΩ single high-side switch optimized for industrial I/O with 0.7 A current limitation, ≤60 μs startup propagation delay, and integrated open-load/overload/thermal diagnostics. It drives resistive, capacitive, or inductive loads with one side grounded and meets IEC 61131-2 for PLC interface Class 3 compliance.

For engineers reviewing the IPS161HFTR datasheet, IPS161HFTR pinout, IPS161HFTR application, or IPS161HFTR equivalent, key selection criteria include its programmable cut-off delay via external capacitor, ground/VCC disconnection protection, active demagnetization clamp, diagnostic open-drain output, and PowerSSO12 thermal performance in harsh industrial environments.

Technical Context

The device implements a high-side NMOS power stage with active V_DS clamp for fast inductive load demagnetization (V_demag = V_CC − 68.5 V typical), undervoltage lock-out (6.9 V turn-on, 6.5 V turn-off), and junction thermal shutdown at 150–190 °C with 15 °C hysteresis. Its logic input accepts 2.2 V high-level signals with 0.4 V hysteresis and internal weak pull-down.

Protection architecture includes non-dissipative cut-off (programmable t_COFF = 50 × C_CoD ±35%), GND/VCC disconnection detection, and diagnostic reporting via open-drain DIAG pin for open-load (off-state), overload (cut-off), and thermal shutdown - all independent of IN pin state.

Key Specifications

Pinout & Package

IPS161HFTR uses the PowerSSO12 package: 12-pin exposed-pad surface-mount with integrated thermal path (R_th(JC) = 0.4 °C/W, R_th(JA) = 29 °C/W with 4 thermal vias). The exposed pad (TAB) connects internally to V_CC and must be soldered to PCB copper for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side switch applications.

Compared with VNS16NV04PTR-E and TPS27081AQPWPRQ1, IPS161HFTR uniquely delivers programmable cut-off, open-load detection with blanking, and dual disconnection protection - making it the only option qualified for IEC 61131-2 Class 3 PLC I/O where fault transparency and safe shutdown are mandatory.

Availability

IPS161HFTR is available at Aetrix Electronics and suitable for programmable logic controllers, industrial PC peripheral I/O, numerical control machines, and domotics panels requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IPS161HFTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

IPS161HFTR belongs to ST's Industrial Power Switch family - engineered specifically for high-reliability, high-diagnostic industrial I/O modules requiring functional safety compliance, robust fault handling, and seamless integration into PLC and motion control architectures.

FAQ

What is the minimum external capacitor value required to program cut-off delay on the CoD pin?

The datasheet specifies a guaranteed linear range of 10 nF to 100 nF for C_CoD, where t_COFF = 50 × C_CoD ±35%. While values below 10 nF may function, timing accuracy is not characterized. For a 1 μs resolution, 20 pF is the practical lower limit - but 10 nF remains the validated minimum for production designs.

How does the open-load detection behave with inductive loads during turn-off?

During inductive load turn-off, the open-load comparator is blanked for t_BKT = 200 μs to ignore demagnetization ringing. Detection only activates after this window if V_OUT exceeds V_OLoff = 4 V (max) - ensuring no false alarms from voltage overshoot. The DIAG pin asserts low only after blanking expires and the condition persists.

Can IPS161HFTR drive a 24 V, 500 mA solenoid directly without external flyback protection?

Yes - its integrated active V_DS clamp (V_demag = V_CC − 68.5 V) safely dissipates demagnetization energy. For a 24 V, 500 mA solenoid with L ≤ 1.2 mH (per Figure 14), single-pulse E_DEMAG stays below 1000 mJ - within the IC's rated 3000 mJ capability at T_AMB = 125 °C.

What is the maximum allowable ambient temperature when operating at 60 V supply with continuous 0.7 A load?

With R_th(JA) = 29 °C/W (4 thermal vias), P_DISS = I² × R_DS(on) = (0.7 A)² × 0.08 Ω = 39 mW. At T_JMAX = 150 °C, T_AMB = 150 − (0.039 W × 29 °C/W) = 138.7 °C - well above industrial grade (−40 to +85 °C). Derating begins only above 125 °C ambient.