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STMicroelectronics TDE1747FPT
- Part No.:
- TDE1747FPT
- Manufacturer:
- STMicroelectronics
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TDE1747FPT.pdf
- Description:
- IC PWR DRIVER BIPOLAR 1:1 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,335
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Product details
Overview
TDE1747FPT from STMicroelectronics is a monolithic high-voltage, high-current comparator designed for industrial interface and load-driving applications. It delivers up to 1 A output current, operates from +8 V to +45 V supply, features adjustable short-circuit protection (via single external resistor), thermal shutdown with hysteresis, and open-ground protection. It drives relays, lamps, and stepping motors in rugged industrial control systems.
For engineers reviewing the TDE1747FPT datasheet, TDE1747FPT pinout, TDE1747FPT application, or TDE1747FPT equivalent, key selection criteria include its wide supply range (+8 V to +45 V), 1 A continuous output capability, adjustable short-circuit current limit (35–480 mA), thermal hysteresis behavior, and SO14 package compatibility with industrial PCB layouts.
Technical Context
The TDE1747FPT integrates a precision comparator core with robust output stage protection logic. Its input offset voltage is ≤50 mV, common-mode input range spans 2 V to VCC–2 V, and it supports differential input voltages up to ±50 V - enabling direct sensing in noisy industrial environments.
Output stage design includes dual short-circuit protections: to ground (adjustable via RSC) and to VCC. Thermal protection activates at junction temperatures exceeding ~150 °C, with hysteresis preventing oscillation near trip point, ensuring stable shutdown/recovery during transient overload conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +8 V to +45 V - supports standard industrial rails (12 V, 24 V) and legacy ±15 V op-amp supplies without level-shifting. |
| Max Output Current | 1 A - drives low-impedance relays (e.g., 300 mA coils) and lamp loads directly without external boost transistors. |
| Short-Circuit Limit (RSC = 1.5 Ω) | 480 mA typical - sets safe peak current during ground fault; adjustable down to 35 mA with infinite RSC. |
| Output Saturation Voltage (300 mA) | 1.05–1.4 V - ensures ≥22.6 V effective drive headroom at 24 V supply, minimizing power loss in load path. |
| Input Offset Voltage | ≤50 mV - enables reliable detection of small differential signals (e.g., sensor thresholds) without calibration. |
| Thermal Shutdown Threshold | ~150 °C junction temperature with hysteresis - prevents thermal runaway while avoiding nuisance tripping during brief overloads. |
Pinout & Package
Package: SO14 (Small Outline, 14-pin, ECOPACK® compliant). Dimensions per DS4791 Rev 2: D = 8.55–8.75 mm, E = 3.80–4.00 mm, e = 1.27 mm pitch. Surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Non-inverting input | Accepts reference or signal input; CMVR extends to 2 V below VCC, enabling direct connection to 24 V logic or sensor outputs. |
| 2 (IN−) | Inverting input | Receives feedback or threshold signal; differential input rating ±50 V allows use with floating sensors or isolated inputs. |
| 3 (OUT) | High-current open-collector output | Sinks up to 1 A; requires external pull-up to VCC or load; protected against short-to-VCC and short-to-ground faults. |
| 4 (GND) | Power ground reference | Return path for internal bias and output stage; open-ground protection disables output if disconnected. |
| 5 (VCC) | Positive supply input | Accepts +8 V to +45 V; internal regulation powers comparator and protection circuitry independently of load current. |
| 14 (RSC) | Short-circuit limit adjustment | Connects external resistor to set peak output current; 1.5 Ω yields ~480 mA limit; open circuit yields ~35 mA minimum. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable short-circuit protection | Single external resistor (RSC) sets output current limit from 35 mA to 480 mA - eliminates need for discrete current-sense resistors or complex feedback loops. |
| Thermal protection with hysteresis | Shuts down above ~150 °C junction temperature and restarts only after cooling by ≥10 °C - avoids oscillatory behavior during sustained overload. |
| Open-ground fault detection | Disables output if GND pin is disconnected - prevents uncontrolled output state and protects downstream loads from undefined voltage levels. |
| Short-circuit protection to VCC | Internal circuitry limits current during OUT-to-VCC shorts - maintains device integrity even when output accidentally wired to supply rail. |
Applications
| Industrial Relay Control | Lamp Driver Circuit |
|---|---|
|
Use Scenario: Driving 24 V DC electromagnetic relays with coil resistance < 100 Ω in PLC I/O modules. IC Role / Device Role / Timing Role: High-side switch controller with built-in current limiting and thermal safety - replaces discrete transistor + sense + protection circuits. Use Value: Eliminates external current-limiting resistors and thermal foldback circuitry, reducing BOM count by ≥4 components per channel. |
Use Scenario: Switching incandescent or LED indicator lamps in HMI panels and machine status displays. IC Role / Device Role / Timing Role: Robust load driver with fast response (< 1 µs rise/fall per Fig.13) and short-circuit immunity - handles inrush currents and accidental shorts. Use Value: Sustains 1 A peak inrush without latch-up; survives repeated lamp filament shorts during cold-start conditions. |
| Stepping Motor Phase Driver | Industrial PC Peripheral Interface |
|
Use Scenario: Driving one phase of a bipolar stepper motor (e.g., 24 V, 300 mA/phase) in CNC motion controllers. IC Role / Device Role / Timing Role: Current-limited comparator-based driver stage - provides precise on/off control with integrated fault recovery. Use Value: Adjustable RSC allows matching motor phase current without redesign; thermal hysteresis prevents lockup during stall conditions. |
Use Scenario: Isolating and amplifying digital I/O signals between industrial PC backplanes and field devices. IC Role / Device Role / Timing Role: Level-translating interface buffer with ±50 V differential input tolerance - interfaces TTL/CMOS logic to noisy 24 V field wiring. Use Value: Withstands induced transients on long cables; open-ground detection alerts host system to wiring faults before damage occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current industrial interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ULN2003A | 7-channel Darlington array; max 500 mA per channel; no adjustable short-circuit limit or thermal hysteresis. | Best for multi-load, lower-current (≤500 mA), non-critical thermal environments; lacks single-resistor current tuning. | Choose ULN2003A when driving multiple low-power relays/lamps simultaneously and thermal margin is ample. |
| TBD62783AFWG | Single-channel DMOS driver; 1.5 A peak; fixed 1.2 A current limit; no open-ground protection or RSC adjustability. | Higher peak current but less flexible fault management; requires external thermal monitoring for sustained loads. | Choose TBD62783AFWG only when >1 A peak is required and system-level thermal supervision is already implemented. |
Compared with ULN2003A and TBD62783AFWG, TDE1747FPT uniquely combines adjustable current limiting, open-ground detection, and thermal hysteresis in a single SO14 package - making it optimal for safety-critical, single-load industrial drivers where fault resilience and design simplicity are prioritized.
Availability
TDE1747FPT is available at Aetrix Electronics and suitable for industrial relay control, lamp driving, stepping motor phase switching, and industrial PC peripheral interfacing requiring stable component supply across extended production lifecycles.
Supply support for TDE1747FPT 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 broad analog and discrete product portfolios.
TDE1747FPT belongs to ST's industrial interface and high-voltage driver product line, engineered specifically for ruggedized load-switching applications in factory automation, PLCs, and motion control systems where reliability under electrical stress is critical.
FAQ
What is the purpose of the RSC pin (Pin 14) on the TDE1747FPT?
Pin 14 (RSC) connects an external resistor to set the peak output current limit during short-circuit-to-ground events. With RSC = 1.5 Ω, typical short-circuit current is 480 mA; increasing RSC reduces the limit down to ~35 mA. This single-resistor adjustment replaces complex current-sense circuitry and enables precise load matching without redesign.
Does the TDE1747FPT require a heatsink in typical 24 V, 300 mA relay-driving applications?
No heatsink is required for continuous 300 mA operation at 24 V ambient (TA = 25 °C), as power dissipation remains below 450 mW (VO(sat) × IO ≈ 1.25 V × 0.3 A). The device's Rth(JA) = 120 °C/W results in ~54 °C junction rise - well within the -25 to +85 °C operating range. Heatsinking becomes necessary only above 500 mA or in high-ambient (>60 °C) enclosures.
Can the TDE1747FPT drive inductive loads without external flyback diodes?
No - external flyback diodes are mandatory for inductive loads like relays or stepper motor coils. Although the TDE1747FPT includes short-circuit and thermal protections, it does not integrate clamp diodes or energy-dissipating circuitry for inductive kickback. Omitting the diode risks exceeding VCC absolute maximum rating (50 V) and damaging the output stage.
How does open-ground protection function, and what happens when GND (Pin 4) is disconnected?
Open-ground protection monitors continuity between Pin 4 (GND) and system ground. If disconnection occurs, internal circuitry forces the output (Pin 3) into high-impedance state - disabling drive to the load. This prevents undefined output voltage, unintended actuation, or latch-up during wiring faults, enhancing system safety in field-deployed equipment.
TDE1747FPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- Relay, Solenoid Driver
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- Bipolar
- Interface:
- On/Off
- Voltage - Load:
- 10V ~ 45V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 1A
- Rds On (Typ):
- -
- Input Type:
- Inverting, Non-Inverting
- Features:
- -
- Fault Protection:
- Current Limiting (Adjustable), Over Temperature
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
TDE1747FPT FAQ
1.How can I place an order for TDE1747FPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TDE1747FPT 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 TDE1747FPT reliable?
The price and inventory of TDE1747FPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDE1747FPT is usually 5 days.
3.What payment methods are accepted for TDE1747FPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDE1747FPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDE1747FPT?
TDE1747FPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDE1747FPT 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 TDE1747FPT?
For technical support, including TDE1747FPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDE1747FPT requirements.
6.How does Aetrix verify that TDE1747FPT is sourced from the original manufacturer or authorized distributors?
All TDE1747FPT 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 TDE1747FPT meets industry standards.
7.What is the process for return or replacement of TDE1747FPT?
All TDE1747FPT units undergo pre-shipment inspection (PSI). If there is an issue with TDE1747FPT, 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 TDE1747FPT part is unused and in its original packaging.
Return procedure for TDE1747FPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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