STMicroelectronics TDE1897RDP

Overview

TDE1897RDP from STMicroelectronics is a monolithic high-side intelligent power switch in Multipower BCD technology, designed for driving inductive or resistive loads in industrial control systems. It delivers 0.5A output current, operates from 18V to 35V supply, integrates internal current limiting and thermal shutdown, and features differential inputs with ±7V to +15V common-mode range and 50–400mV input hysteresis - enabling robust operation in noisy factory environments.

For engineers reviewing the TDE1897RDP datasheet, TDE1897RDP pinout, TDE1897RDP application, or TDE1897RDP equivalent, key selection criteria include its open-load detection (0.5–9.5mA threshold), dual diagnostic outputs (Diag1/Diag2), internal clamping diode (VS–VO ≤ 45V), and SIP9 package thermal resistance (R_{th j-amb} = 70°C/W) for sustained 625mA operation at +85°C ambient.

Technical Context

The TDE1897RDP implements a high-side NDMOS power switch with integrated protection logic, including undervoltage lockout (V_sth1 = 11V, V_sth2 = 15.5V, hysteresis ≥ 0.4V), open-ground detection, and negative voltage clamping to VS – 45V. Its differential input stage supports wide common-mode range (–7V to +15V) and provides 0.8–2V input threshold with programmable hysteresis (50–400mV), ensuring noise immunity during PLC I/O interfacing.

Two dedicated diagnostic outputs signal load status: Diag1 indicates short-to-VS or overtemperature; Diag2 distinguishes open-load (I_old < 9.5mA) and short-circuit conditions per truth table. The device uses internal current limiting (I_sc = 0.75–1.5A) and thermal shutdown (T_j = 135–150°C, hysteresis = 30°C) to maintain fault resilience without external supervision.

Key Specifications

Pinout & Package

SIP9 package: 9-pin single-in-line, 2.54mm pitch, 23mm × 7.1mm footprint, R_{th j-amb} = 70°C/W - optimized for convection-cooled industrial PCBs without heatsinks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VNS1NV04PTR-E and BTS4141N, the TDE1897RDP uniquely combines differential input noise rejection, open-ground protection, and dual-classified diagnostics in SIP9 - making it optimal for safety-critical, EMI-prone industrial I/O where fault isolation speed and accuracy directly impact uptime.

Availability

TDE1897RDP is available at Aetrix Electronics and suitable for PLC digital output modules, industrial solenoid drivers, factory floor indicator panels, and machine safety interlock circuits requiring stable component supply and long-term industrial lifecycle support.

Supply support for TDE1897RDP 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 ICs with vertical manufacturing capability in BCD process technologies.

The TDE1897RDP belongs to ST's Intelligent Power Switch (IPS) product line, engineered specifically for industrial automation applications demanding integrated protection, diagnostic visibility, and ruggedness in harsh electromagnetic and thermal environments.

FAQ

What is the maximum inductive energy the TDE1897RDP can safely absorb during demagnetization?

The TDE1897RDP absorbs up to 200mJ from inductive loads at junction temperature ≤85°C, enabled by its internal 45–55V clamp diode. This value is specified under worst-case thermal conditions and defines the upper limit for L×I²/2 energy per switching cycle. Exceeding this risks thermal runaway during high-frequency operation unless board-level heat dissipation is enhanced.

How does the TDE1897RDP distinguish between open-load and short-circuit faults?

TDE1897RDP uses Diag2 to identify open-load (Io < 0.5–9.5mA) and short-circuit (Io > 0.75–1.5A) conditions simultaneously with Diag1. When Diag1 = LOW and Diag2 = HIGH, it signals open-load; when both are LOW, it indicates short-to-ground. This dual-signal logic allows unambiguous fault classification without software interpretation.

Can the TDE1897RDP drive a 24V LED indicator directly from the OS pin?

Yes - the OS pin sources up to 4mA with ≤5V drop at 2mA, allowing direct drive of standard 24V LEDs with appropriate series resistance. For a 2.5V LED at 2mA, a 10.75kΩ resistor sets current while maintaining V_osd within spec. The OS driver remains active only when OUT is ON, providing inherent status synchronization.

Why does the TDE1897RDP specify two undervoltage thresholds (Vsth1 and Vsth2)?

V_sth1 = 11V (falling edge) and V_sth2 = 15.5V (rising edge) create 4.5V hysteresis to prevent oscillation during supply brownouts. This ensures clean turn-off below 11V and reliable re-enable only after voltage recovers above 15.5V - critical for avoiding erratic behavior in fluctuating 24V industrial rails subject to motor startup dips.