STMicroelectronics IPS161H

Overview

IPS161H from STMicroelectronics is a monolithic 60 V, 60 mΩ single high-side switch designed for industrial I/O control with ground-referenced loads. It delivers 0.7 A output current limitation, features fast active demagnetization for inductive loads, non-dissipative short-circuit cut-off protection, and integrated diagnostics (open load in off-state, thermal shutdown, overload). It is used in programmable logic controllers and numerical control machines requiring SIL-compliant power switching.

For engineers reviewing the IPS161H datasheet, IPS161H pinout, IPS161H application, or IPS161H equivalent, this page provides verified technical context, exact pin functions, real-world diagnostic behavior, thermal derating data, and validated alternative parts - all derived from STMicroelectronics DS10907 Rev 12 (Jan 2024).

Technical Context

The IPS161H implements a high-side MOSFET power stage with integrated active V_DS clamp for fast demagnetization of inductive loads, enabling controlled energy dissipation without external diodes. Its cut-off protection uses an external capacitor on CoD to set delay time (50 × C_CoD ±35%), while thermal shutdown triggers at 150–190 °C with 15 °C hysteresis.

Diagnostic reporting occurs via open-drain DIAG pin, which asserts low for open load (off-state), cut-off, or junction thermal shutdown - independent of IN state. Undervoltage lock-out operates between 6.5–7.8 V (V_UVOFF) and 6.9–8 V (V_UVON), with 0.15–0.5 V hysteresis, ensuring robust start-up and brown-out recovery.

Key Specifications

Pinout & Package

IPS161H is housed in PowerSSO12 package: 12-pin exposed-pad surface-mount with integrated heat sink (R_th(JC) = 0.4 °C/W), optimized for high-power density industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VNS1NV04PTR-E and IPS1036H, the IPS161H uniquely combines 60 V operation, 0.7 A current limiting with programmable cut-off, full disconnection protections, and IEC 61131-2 compliance - making it the only choice for SIL-targeted industrial I/O where reliability and diagnostics are mandatory.

Availability

IPS161H is available at Aetrix Electronics and suitable for programmable logic controllers, industrial PC peripheral I/O, and numerical control machines requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IPS161H 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, specializing in automotive, industrial, and power management solutions with over 45 years of analog and power IC innovation.

The IPS161H belongs to ST's Industrial High-Side Switch product line, engineered specifically for robust, diagnostic-rich power distribution in programmable controllers and factory automation systems demanding functional safety and field reliability.

FAQ

What is the minimum external capacitor value required to program cut-off delay on IPS161H?

The datasheet specifies a guaranteed operating range of 10 nF ≤ C_CoD ≤ 100 nF for accurate cut-off delay (t_coff = 50 × C_CoD ±35%). Using <10 nF is possible but not guaranteed - t_coff may deviate beyond ±35%, and values below 1 nF risk unreliable timing. For T_AMB < −20 °C and V_CC > 36 V, ST recommends ≥1 nF (e.g., 1 nF for 50 μs delay at 60 V).

How does the IPS161H handle open-load detection with inductive loads?

During OFF state, open-load detection is masked for 200 μs (t_BKT) to suppress false triggers caused by output ringing during demagnetization. After blanking, if V_OUT exceeds 2–4 V (V_OLOFF), DIAG pulls low. The feature requires an external pull-up resistor (R_PU) between OUT and V_CC; design equations in DS10907 Section 6.4 ensure correct threshold margining for both connected and disconnected loads.

Can IPS161H drive loads directly connected to system ground without external components?

Yes - the IPS161H is a true high-side switch designed for ground-referenced loads. No external flyback diode is needed for inductive loads due to its integrated active V_DS clamp (V_demag ≈ V_CC − 68.5 V). However, open-load detection requires an external R_PU, and cut-off delay requires either a capacitor on CoD or a 1 kΩ resistor to GND - both are mandatory for full functionality per datasheet.

What thermal derating applies when using IPS161H on a standard FR-4 PCB without thermal vias?

With R_th(JA) = 117 °C/W (1s test condition), maximum power dissipation at T_AMB = 85 °C and T_J < 150 °C is 0.5 W. At 0.7 A and 60 mΩ, conduction loss is ~30 mW - well within limit. But during cut-off or overload, transient power spikes require careful layout: keep traces short, use ≥2 oz copper, and avoid routing near heat sources to prevent premature thermal shutdown.