STMicroelectronics TDE1897CDP

Overview

TDE1897CDP 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, features internal current limiting, thermal shutdown, open-ground protection, and differential inputs with ±7V to +15V common-mode range - enabling robust operation in noisy factory environments.

For engineers reviewing the TDE1897CDP datasheet, TDE1897CDP pinout, TDE1897CDP application, or TDE1897CDP equivalent, key selection criteria include its 45V internal clamp voltage for fast demagnetization, dual diagnostic outputs (Diag1/Diag2), open-load detection threshold of 1–6mA, and SIP9 package thermal resistance of 70°C/W - all critical for PLC output stage and motor actuator design.

Technical Context

The TDE1897CDP integrates an NDMOS high-side switch with internal clamping diode (V_cl = 45–55V), enabling safe energy dissipation up to 200mJ during inductive load demagnetization. Its differential input stage provides hysteresis (50–400mV) and wide common-mode range (–7V to +15V), supporting direct connection to microcontroller GPIOs or isolated digital signals.

Two dedicated diagnostic outputs report real-time fault conditions including open load, short-to-VS, short-to-ground, overtemperature, and undervoltage lockout - with Diag2 uniquely signaling cold-lamp or capacitive inrush events. The device implements analog-based current limiting (I_sc = 0.75–1.5A), thermal shutdown at 135°C ±15°C, and UVLO with dual thresholds (11V/15.5V) and 0.4–3V hysteresis.

Key Specifications

Pinout & Package

Package: SIP9 (Single In-line Package, 9-pin), 70°C/W junction-to-ambient thermal resistance, through-hole mounting with 2.54mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VNS1NV04PTR and BTS716G, the TDE1897CDP offers superior industrial robustness via differential inputs, dual diagnostics, and guaranteed 45V clamp - making it optimal for PLC output stages requiring fault classification and noise immunity in harsh environments.

Availability

TDE1897CDP is available at Aetrix Electronics and suitable for PLC digital output modules, industrial solenoid drivers, and motor starter controls requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TDE1897CDP 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 power management, automotive ICs, and industrial control solutions.

The TDE1897C series belongs to ST's Intelligent Power Switch (IPS) product line, engineered specifically for industrial automation applications demanding high reliability, integrated protection, and diagnostic feedback in 24V DC control systems.

FAQ

What is the maximum inductive energy the TDE1897CDP can safely absorb during demagnetization?

The TDE1897CDP is rated for 200mJ of inductive energy absorption at junction temperature of 85°C. This value is enabled by its internal clamp diode with 45–55V breakdown voltage and is validated under worst-case conditions (e.g., 625mA peak current, 30V supply). Exceeding this energy risks thermal runaway or permanent damage, especially without adequate PCB copper area for heat dissipation.

How does the differential input stage improve noise immunity compared to single-ended switches?

The differential input (Pins 7/8) rejects common-mode noise up to ±7V and supports a wide operating range (–7V to +15V), allowing direct connection to long, unshielded field wiring without external filtering. Its 50–400mV hysteresis prevents chatter during slow-rising or noisy edges - a critical advantage over single-ended inputs that require external RC filters and are susceptible to ground bounce in multi-channel systems.

Can the TDE1897CDP drive a 24V LED indicator directly from the OS pin?

Yes - the Output Status (OS) pin sources 2–4mA with ≤5V drop at 2mA, enabling direct drive of standard 2.5V red/green LEDs (e.g., 2.1V forward voltage, 2mA current) using a 1kΩ series resistor. This eliminates external driver transistors and provides visual confirmation of output activation without loading the main OUT pin or affecting load switching performance.

Why does the TDE1897CDP use a SIP9 package instead of SO-20 or Minidip?

The SIP9 package provides 70°C/W junction-to-ambient thermal resistance - significantly lower than Minidip (100°C/W) and SO-20 (90°C/W) - enabling full 0.5A output current across the full –25°C to +85°C ambient range without derating. Its through-hole construction also enhances mechanical stability in vibration-prone industrial enclosures, unlike surface-mount alternatives requiring additional mounting hardware.