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STMicroelectronics TDE1897RFP
- Part No.:
- TDE1897RFP
- Manufacturer:
- STMicroelectronics
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TDE1897RFP.pdf
- Description:
- IC PWR SWITCH N-CHANNEL 1:1 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,655
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Product details
Overview
TDE1897RFP from STMicroelectronics is a monolithic 0.5A high-side intelligent power switch in Multipower BCD technology, designed for driving inductive or resistive loads in industrial control systems. It features internal current limiting, thermal shutdown, open-ground protection, differential inputs with ±7 V to +15 V common-mode range, and two diagnostic outputs (Diag1, Diag2) for CPU feedback. Used in PLC output stages and valve drivers requiring robust fault reporting.
For engineers reviewing the TDE1897RFP datasheet, TDE1897RFP pinout, TDE1897RFP application, or TDE1897RFP equivalent, key selection criteria include its 18–35 V supply range, 45 V internal clamp voltage for fast demagnetization, dual diagnostic logic states (L/H), and SIP9 package thermal resistance of 70 °C/W - critical for continuous 625 mA operation at elevated ambient temperatures.
Technical Context
The TDE1897RFP integrates an NDMOS high-side power switch with integrated clamping diode (VCL = 45–55 V), enabling safe energy dissipation up to 200 mJ during inductive load demagnetization. Its differential input stage provides hysteresis (50–400 mV) and operates across a wide common-mode range (–7 V to +15 V referenced to VS), supporting noisy industrial bus environments.
Two independent diagnostic outputs signal fault conditions including open load (IOLD = 0.5–9.5 mA), short-to-VS, short-to-ground, overtemperature (ΘLIM = 135–150 °C), and undervoltage lockout (VSTH1 = 11 V, VSTH2 = 15.5 V with 0.4–3 V hysteresis). The Output Status pin drives LEDs directly with 2–4 mA source capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 0.5 A nominal; supports 625 mA peak for 10 ms without thermal shutdown in SIP9 package at 66.7 °C ambient. |
| Supply Voltage Range | 18–35 V; enables direct connection to 24 V industrial DC buses with ±25% tolerance. |
| Internal Clamp Voltage | 45–55 V (VS – VO); eliminates need for external flyback diodes in solenoid/valve driver circuits. |
| Differential Input Threshold | 0.8–2.0 V with 50–400 mV hysteresis; rejects noise while ensuring reliable turn-on/turn-off in EMI-heavy environments. |
| Diagnostic Outputs | Two open-drain outputs (Diag1, Diag2); TDE1897R uses Diag2 to flag cold-lamp inrush-induced current limiting events. |
| Thermal Protection | 135–150 °C junction limit with 30 °C hysteresis; prevents latch-up during sustained overload or poor heatsinking. |
| Switching Speed | 100 µs turn-on delay, 20 µs turn-off delay into 48 Ω load; suitable for PWM-controlled actuators below 5 kHz. |
Pinout & Package
SIP9 package: 9-pin single-inline package with 2.54 mm pitch, 70 °C/W junction-to-ambient thermal resistance, and 23 mm × 7.1 mm footprint optimized for industrial PCB layouts with minimal heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Power Ground Reference | Common return for internal logic, diagnostics, and output status driver; must be low-impedance to avoid false open-load detection. |
| 2 (OUT) | High-Side Power Output | Drives load between this pin and VS; internal NDMOS switch with RDS(on) = 0.6 Ω @ 25 °C, rising to 1.006 Ω @ 135 °C. |
| 3 (VS) | Positive Supply Input | 18–35 V main rail; powers output stage and internal circuitry; clamped to OUT by internal zener during demagnetization. |
| 4 (OS) | Output Status Driver | Current-source output (2–4 mA) for LED indication; drops ≤5 V at 2 mA, compatible with standard 2.5 V LED forward voltage. |
| 5,6 (D1,D2) | Diagnostic Open-Drain Outputs | Active-low fault indicators; pulled high externally; D2 distinguishes cold-lamp inrush from true short-circuit in TDE1897R. |
| 7,8 (+IN,–IN) | Differential Input Pair | Logic-level interface with hysteresis; accepts common-mode voltages from –7 V to +15 V relative to VS, rejecting ground bounce. |
| 9 (NC) | No Connect | Internally unconnected; must remain floating per datasheet; no routing or soldering required. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Demagnetization Clamp | 45–55 V internal zener eliminates external TVS/flyback diodes in solenoid and relay driver designs. |
| Dual Diagnostic Logic States | Separate Diag1/Diag2 outputs encode 6 distinct fault modes (open load, short-to-VS, short-to-GND, overtemp, UVLO, DMOS open) via truth table. |
| Wide Common-Mode Input Range | –7 V to +15 V on differential inputs enables direct interfacing with isolated microcontroller GPIOs or optocoupler outputs. |
| Open Load Detection | Valid down to 0.5 mA load current; detects disconnected valves or broken wiring before system-level failure occurs. |
| LED-Driven Output Status | Integrated 2–4 mA constant-current sink on OS pin simplifies visual status indication without external current-limiting resistors. |
Applications
| PLC Digital Output Module | Industrial Solenoid Valve Driver |
|---|---|
Use Scenario: 24 V DC output stage in modular programmable logic controller rack handling multiple field devices. IC Role / Device Role / Timing Role: High-side switch providing galvanically isolated load control with real-time fault reporting to backplane CPU. Use Value: Eliminates need for discrete protection components and reduces board space by 35% versus discrete MOSFET + comparator + diode solution. |
Use Scenario: Driving 24 V solenoid valves in packaging machinery where rapid coil de-energization prevents mechanical sticking. IC Role / Device Role / Timing Role: High-side power switch with integrated 45 V clamp enabling <100 µs demagnetization without external snubbers. Use Value: Reduces valve release time by 40% compared to unclamped drivers, improving cycle rate in high-speed filling lines. |
| Factory Automation I/O Terminal | Motorized Actuator Control |
Use Scenario: DIN-rail mounted remote I/O terminal connecting to field sensors and actuators over long cable runs. IC Role / Device Role / Timing Role: Robust load driver with differential inputs tolerating >10 V ground offset between controller and field device. Use Value: Prevents spurious tripping in electrically noisy environments where ground loops induce >5 V common-mode noise. |
Use Scenario: Controlling 24 V DC linear actuators in HVAC damper control systems requiring position feedback and stall detection. IC Role / Device Role / Timing Role: High-side switch with open-load and overcurrent diagnostics feeding safety logic for end-stop verification. Use Value: Enables automatic stall detection during actuator jamming, triggering immediate shutdown before gear damage occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side intelligent power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VNS1NV04PTR | 0.4 A rating, 40 V max clamp, SO-8 package, single diagnostic output, no differential input. | Lacks dual diagnostics and wide common-mode input; suitable only for non-critical 24 V resistive loads. | Select when cost sensitivity outweighs diagnostic depth and noise immunity requirements. |
| IPS1032HTR | 3.2 A rating, 60 V clamp, SO-20 package, integrated current sense, SPI interface, no differential input. | Higher current and digital interface enable closed-loop current control but require MCU firmware support. | Select when precise current monitoring and programmable trip thresholds are required over analog simplicity. |
Compared with VNS1NV04PTR and IPS1032HTR, the TDE1897RFP uniquely balances industrial-grade fault coverage (dual diagnostics, differential inputs, cold-lamp detection), thermal robustness in SIP9, and analog simplicity - making it optimal for legacy PLC upgrades and noise-prone valve control where SPI complexity is unwarranted.
Availability
TDE1897RFP is available at Aetrix Electronics and suitable for PLC output modules, industrial solenoid valve drivers, factory automation I/O terminals, and motorized actuator control systems requiring stable component supply and long-term industrial lifecycle support.
Supply support for TDE1897RFP 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 capabilities.
The TDE1897RFP belongs to ST's Intelligent Power Switch (IPS) product line, engineered specifically for industrial control applications demanding high reliability, comprehensive diagnostics, and ruggedized operation in harsh electromagnetic environments.
FAQ
What is the maximum continuous output current for TDE1897RFP in SIP9 package at 70 °C ambient?
The TDE1897RFP supports 625 mA continuous output current in SIP9 package up to 66.7 °C ambient temperature under worst-case conditions (30 V supply, max RDS(on), no airflow). This derating curve is defined by thermal resistance of 70 °C/W and 135 °C junction limit. Above 66.7 °C, output current must be reduced per Figure 8 in the datasheet.
How does the TDE1897RFP distinguish cold lamp inrush from a true short circuit?
The TDE1897RFP uses Diag2 to signal cold filament inrush: during initial turn-on, high inrush current triggers current limiting, causing Diag2 to go low while Diag1 remains high - a unique state not generated by short-to-ground or open-load faults. This behavior is absent in TDE1898R, which lacks Diag2-based inrush detection.
Can the TDE1897RFP drive a 24 V LED indicator directly from the OS pin?
Yes - the Output Status (OS) pin provides 2–4 mA constant current source capability with ≤5 V drop at 2 mA. When paired with a standard red LED (VF ≈ 2.0 V), it delivers ~10 mA total current through the LED path (OS → LED anode → cathode → GND), eliminating need for external current-limiting resistors.
What is the minimum supply voltage required for valid diagnostic reporting?
Valid diagnostic reporting requires VS ≥ 9 V, as specified by VSmin = 9 V for Idiag > 0.5 mA at VDG1 = 1.5 V. Below 9 V, diagnostic outputs may become indeterminate due to insufficient internal biasing; undervoltage lockout activates fully at VSTH1 = 11 V (falling edge) and VSTH2 = 15.5 V (rising edge).
TDE1897RFP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 18V ~ 35V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 500mA
- Rds On (Typ):
- -
- Input Type:
- Differential
- Features:
- -
- Fault Protection:
- Current Limiting (Fixed), Open Load Detect, Over Temperature, UVLO
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
TDE1897RFP FAQ
1.How can I place an order for TDE1897RFP through Aetrix?
Please submit a Request for Quotation (RFQ) for TDE1897RFP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TDE1897RFP reliable?
The price and inventory of TDE1897RFP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDE1897RFP is usually 5 days.
3.What payment methods are accepted for TDE1897RFP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDE1897RFP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDE1897RFP?
TDE1897RFP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDE1897RFP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TDE1897RFP?
For technical support, including TDE1897RFP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDE1897RFP requirements.
6.How does Aetrix verify that TDE1897RFP is sourced from the original manufacturer or authorized distributors?
All TDE1897RFP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TDE1897RFP meets industry standards.
7.What is the process for return or replacement of TDE1897RFP?
All TDE1897RFP units undergo pre-shipment inspection (PSI). If there is an issue with TDE1897RFP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TDE1897RFP part is unused and in its original packaging.
Return procedure for TDE1897RFP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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