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STMicroelectronics GS-R424
- Part No.:
- GS-R424
- Manufacturer:
- STMicroelectronics
- Category:
- DC DC Converters
- Package:
- Module
- Datasheet:
-
GS-R424.pdf
- Description:
- DC DC CONVERTER 24V
- Quantity:
- Payment:
- Shipping:
Inventory:1,664
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Product details
Overview
GS-R424 from SGS-THOMSON Microelectronics is a fixed-output, 24.0 V ±4%, high-voltage step-down switching regulator delivering up to 4 A continuous output current with 46 V max input voltage, 100 mVpp output ripple, and 90% efficiency at full load - deployed in industrial power supplies requiring stable 24 V DC rails.
For engineers reviewing the GS-R424 datasheet, GS-R424 pinout, GS-R424 application, or GS-R424 equivalent, key selection criteria include remote sense capability (±500 mV compensation), non-latching overload protection, crow-bar overvoltage shutdown at Vo×1.25, soft-start timing (10–35 ms), and thermal resistance of 5 °C/W for case-to-ambient dissipation.
Technical Context
The GS-R424 operates as a fixed-frequency (100 kHz) PWM buck converter with internal MOSFET switching, integrated heatsink, and EMI-shielded metal case. It features active current limiting, temperature-stable regulation (0.2–1.6 mV/°C), and supply voltage rejection of 4–12 mV/V at 100 Hz.
Remote sensing is implemented via dedicated +Sense (pin 10) and –Sense (pin 9) terminals, enabling precise load-side voltage regulation under up to 500 mV total wire drop. Inhibit control (pin 1) uses TTL-compatible logic levels (0.8 V low, 2–5.5 V high) for system-level enable/disable sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 24.0 V ±4% - fixed regulation set at factory; stable across line/load/temperature per spec. |
| Input Voltage Range | 28–46 V DC - supports wide industrial input; absolute max 48 V. |
| Max Output Current | 4 A continuous - derated above 85°C case temp; requires external heatsink or forced air if Vo ≥36 V & Io = 4 A. |
| Output Ripple | 100 mVpp at 2 A - measured at full load; confirms low-noise operation without external filtering. |
| Efficiency | 90% at full load - enables compact thermal design with 5 °C/W case-to-ambient thermal resistance. |
| Soft Start Time | 10–35 ms - prevents inrush current during power-up; programmable via internal circuitry. |
| Crowbar Threshold | Vo × 1.25 - triggers immediate output short-circuit to ground if output exceeds 30 V, protecting downstream loads. |
Pinout & Package
GS-R424 uses a metal-cased, through-hole TO-220–like package with integral heatsink and EMI shielding; dimensions match GS-R400 family mechanical outline (bottom view); case is electrically isolated and may be grounded via four corner mounting pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inhibit | Active-high TTL disable input; pulls regulator into standby when >2 V applied. |
| 3 | +Input | Main DC input terminal; rated for 46 V max continuous; connects to bulk input capacitor. |
| 4 | Input GND | Return path for input source; internally tied to pin 8; must be low-inductance connection. |
| 8 | Output GND | Power return for regulated output; internally connected to pin 4; used for local grounding. |
| 9 | –Sense | Remote load return sense point; ties to load ground to compensate for wire drop (max ±250 mV per wire). |
| 10 | +Sense | Remote load high-side sense point; ties to load +V to maintain regulation at load terminals. |
| 11 | +Output | Regulated 24 V output; delivers up to 4 A; routed directly to load or local decoupling caps. |
Key Features
| Feature | Design Value |
|---|---|
| Non-latching overload protection | Auto-restarts after fixed delay upon current limit exceedance - avoids latch-off in transient faults. |
| Remote voltage sensing | ±500 mV total compensation range - maintains ±4% output accuracy at load despite PCB trace IR drop. |
| Crow-bar overvoltage protection | Triggers at Vo×1.25 (30 V) with 5 µs response - clamps output to protect sensitive 24 V loads. |
| Integrated EMI shielding | Metal case acts as sixth-side shield - reduces radiated emissions without external cans or ferrites. |
| Soft start | 10–35 ms controlled ramp - limits input inrush and prevents output overshoot during startup. |
Applications
| Industrial PLC Power Supply | Factory Automation I/O Module |
|---|---|
Use Scenario: Powers 24 V DC fieldbus interfaces and digital I/O banks in programmable logic controllers. IC Role / Device Role / Timing Role: Primary 24 V step-down regulator supplying isolated sensor/actuator interface circuitry. Use Value: Remote sense ensures stable 24 V at terminal blocks despite 1–2 m wiring runs; crow-bar prevents damage during field short circuits. | Use Scenario: Delivers clean 24 V rail to analog input modules measuring 4–20 mA loop signals. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter with low ripple (<100 mVpp) for precision signal conditioning stages. Use Value: 90% efficiency minimizes heat in densely packed I/O chassis; 5 °C/W thermal resistance enables convection-only cooling. |
| Ruggedized Motor Drive Control Board | Outdoor Telecom Remote Unit |
Use Scenario: Supplies gate drivers and logic for 24 V brushless motor controllers in harsh environments. IC Role / Device Role / Timing Role: High-current (4 A) buck regulator with robust thermal design and EMI containment. Use Value: Integral heatsink and metal shielding meet EN 61000-6-4 radiated emission limits; MTBF >200,000 hrs supports long-field deployment. | Use Scenario: Powers remote radio units mounted on cell towers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Wide-input (28–46 V) regulator tolerant of battery+generator hybrid sources and solar charge variations. Use Value: –20 to +85 °C operating case range and 0.2–1.6 mV/°C temp stability ensure consistent 24 V output across –40 to +70 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output high-voltage step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5088MHX/NOPB | External MOSFET controller (not integrated); requires external FET, inductor, and compensation network. | No integrated heatsink or EMI shielding; board-level layout critical for noise and thermal performance. | Choose when design flexibility and BOM cost optimization outweigh need for turnkey ruggedness. |
| TPS548D22RQFT | 40 V max input, 25 A output, but only 2.95–16 V input range - incompatible with 28–46 V GS-R424 requirement. | Designed for point-of-load CPU/GPU VRMs, not industrial 24 V distribution. | Not suitable for GS-R424's input voltage or thermal envelope; avoid for this application. |
Compared with LM5088MHX/NOPB, GS-R424 offers plug-and-play integration with built-in power stage and shielding, while TPS548D22RQFT fails to meet the 28–46 V input requirement - making GS-R424 uniquely suited for high-input-voltage, high-reliability 24 V systems.
Availability
GS-R424 is available at Aetrix Electronics and suitable for industrial PLC power supplies, factory automation I/O modules, ruggedized motor drive control boards, and outdoor telecom remote units requiring stable component supply and long-life availability.
Supply support for GS-R424 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
SGS-THOMSON Microelectronics (now STMicroelectronics) is a European semiconductor manufacturer founded in 1987, specializing in power management, analog, and automotive ICs.
The GS-R400 family was designed for high-reliability industrial power conversion - emphasizing rugged packaging, integrated thermal/EMI management, and fault resilience in uncontrolled environments.
FAQ
Does GS-R424 require external components for basic operation?
Yes - a minimum input capacitor (22 µF ceramic or low-ESR electrolytic rated for 50 V and 2.5 ARMS) is mandatory near pins 3 and 4 to prevent instability. No external inductor or MOSFET is needed, as the power stage is fully integrated with the module's heatsink.
Can GS-R424 be used without remote sensing?
Yes - tie pin 9 (–Sense) to pin 8 (Output GND) and pin 10 (+Sense) to pin 11 (+Output) to disable remote sensing. This configures the regulator for local output regulation, maintaining ±4% accuracy at the module terminals.
What thermal management is required for 4 A output at 24 V?
At 4 A and 24 V output, internal dissipation is ~10 W (assuming 90% efficiency). With Rth = 5 °C/W, case temperature rises ~50 °C above ambient. For ambient up to +35 °C, case reaches +85 °C - the maximum rating. Forced air or external heatsink is recommended for sustained 4 A operation above 35 °C ambient.
Is GS-R424 RoHS compliant or lead-free?
No - GS-R424 was released in June 1994, predating RoHS legislation (2006). It contains leaded solder and packaging materials consistent with 1990s manufacturing standards. STMicroelectronics does not list a RoHS-compliant replacement in the GS-R400 family.
GS-R424 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- GS-R400
- Package/Case:
- Module
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 28V
- Voltage - Input (Max):
- 46V
- Voltage - Output 1:
- 24V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 4A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- -
- Operating Temperature:
- -20°C ~ 85°C
- Efficiency:
- 90%
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
GS-R424 FAQ
1.How can I place an order for GS-R424 through Aetrix?
Please submit a Request for Quotation (RFQ) for GS-R424 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 GS-R424 reliable?
The price and inventory of GS-R424 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GS-R424 is usually 5 days.
3.What payment methods are accepted for GS-R424?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GS-R424 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GS-R424?
GS-R424 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GS-R424 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 GS-R424?
For technical support, including GS-R424 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GS-R424 requirements.
6.How does Aetrix verify that GS-R424 is sourced from the original manufacturer or authorized distributors?
All GS-R424 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 GS-R424 meets industry standards.
7.What is the process for return or replacement of GS-R424?
All GS-R424 units undergo pre-shipment inspection (PSI). If there is an issue with GS-R424, 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 GS-R424 part is unused and in its original packaging.
Return procedure for GS-R424:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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