STMicroelectronics TDE1898CDP

Overview

TDE1898CDP 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-enabling robust operation in noisy factory environments driving solenoids and valves.

For engineers reviewing the TDE1898CDP datasheet, TDE1898CDP pinout, TDE1898CDP application, or TDE1898CDP equivalent, key selection criteria include its open-load detection capability (1–6 mA threshold), dual diagnostic outputs (Diag1/Diag2), internal 45V clamp for fast demagnetization, and SO20 package thermal resistance of 90°C/W-critical for thermal derating in enclosed PLC modules.

Technical Context

The TDE1898CDP implements a protected N-channel DMOS high-side switch with integrated clamping diode (V_CL = 45–55 V) and differential input comparator with 50–400 mV hysteresis. Its diagnostic logic distinguishes open-load, short-to-VS, short-to-ground, overtemperature, and undervoltage conditions using two dedicated outputs.

Unlike the TDE1897C, the TDE1898CDP omits Diag2 reporting of cold-lamp inrush-induced current-limit activation-simplifying diagnostics for non-lamp loads. Its undervoltage lockout uses dual thresholds (11 V / 15.5 V) with 0.4–3 V hysteresis, and output status driver provides 2–4 mA source current at 5 V drop (V_OSD) under load.

Key Specifications

Pinout & Package

Package: SO20 (Small Outline, 20-pin, 0.5 mm pitch, 12.6–13.0 mm × 7.4–7.6 mm body). Thermal resistance: R_{th j-amb} = 90 °C/W, R_{th j-case} = 10 °C/W.

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 BTS4140N, the TDE1898CDP uniquely combines dual diagnostics, differential inputs, open-ground protection, and 45 V clamp in SO20-making it optimal for industrial I/O where wiring integrity, noise immunity, and comprehensive fault coverage are mandatory.

Availability

TDE1898CDP is available at Aetrix Electronics and suitable for industrial PLC modules, automated valve controllers, motor starter auxiliaries, and building automation lighting systems requiring stable component supply across extended product lifecycles.

Supply support for TDE1898CDP 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, analog, microcontrollers, and automotive ICs-with over 40 years of industrial-grade reliability validation.

The TDE1898CDP belongs to ST's Intelligent Power Switch (IPS) family, engineered specifically for robust, self-protected high-side switching in harsh industrial environments-emphasizing fault resilience, thermal safety, and diagnostic transparency over raw speed or efficiency.

FAQ

What is the maximum inductive energy the TDE1898CDP can safely absorb during demagnetization?

The TDE1898CDP absorbs up to 200 mJ from inductive loads at junction temperature 85 °C, enabled by its internal 45–55 V clamp diode. This value is validated per test condition El in the datasheet and defines the upper bound for solenoid coil energy without external snubbers-exceeding this risks thermal runaway during rapid switching.

How does the TDE1898CDP differ from the TDE1897C in diagnostic behavior?

The TDE1898CDP omits Diag2 reporting of cold-lamp inrush-induced current-limit activation-a feature retained in TDE1897C. In all other fault conditions (open load, short-to-VS, short-to-ground, overtemperature, UVLO), both devices behave identically per the shared diagnostic truth table on page 3 of the datasheet.

Can the TDE1898CDP drive a 24 V, 500 mA solenoid continuously at 85 °C ambient?

Yes, but only with SO20 package and proper PCB copper area: derating curves (Figure 7) show 500 mA is sustainable up to ~65 °C ambient at 30 V supply; above that, output current must be reduced per the 90 °C/W thermal resistance curve to maintain junction temperature below 135 °C.

What is the purpose of the differential input structure (Pins 7 and 8)?

The differential input accepts control signals with common-mode range from –7 V to +15 V relative to VS, rejecting noise coupled equally to both lines-critical for long cable runs in factory settings. Its 50–400 mV hysteresis prevents oscillation near threshold, ensuring clean edge-triggered switching even with slow-rising control signals.