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STMicroelectronics STPS2045CH
- Part No.:
- STPS2045CH
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Datasheet:
-
STPS2045CH.pdf
- Description:
- DIODE ARRAY SCHOTT 45V 10A IPAK
- Quantity:
- Payment:
- Shipping:
Inventory:6,702
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Product details
Overview
STPS2045CH from STMicroelectronics is a dual-diode common-cathode Schottky rectifier in IPAK package, rated for 45 V repetitive peak reverse voltage and 2 × 10 A average forward current per diode at TC = 155 °C, with typical forward voltage drop of 0.50 V at 10 A and 125 °C - optimized for high-frequency DC/DC converters and desktop power adapters.
For engineers reviewing the STPS2045CH datasheet, STPS2045CH pinout, STPS2045CH application, or STPS2045CH equivalent, key selection criteria include low conduction loss (VF = 0.50 V typ.), avalanche-rated capability (280 W peak), 175 °C max junction temperature, and IPAK thermal resistance (Rth(j–c) = 2.5 °C/W per diode), critical for compact, high-efficiency SMPS designs.
Technical Context
This device integrates two independent Schottky diodes sharing a common cathode terminal, enabling synchronous rectification or dual-output configurations in flyback and forward converters. Its low VF and fast switching support high-frequency operation (>100 kHz) while minimizing conduction losses and reverse recovery charge.
The IPAK package provides direct thermal coupling to heatsinks via case conduction (Rth(j–c) = 2.5 °C/W per diode, 1.6 °C/W total), and its ECOPACK®2 compliance meets RoHS and halogen-free requirements without compromising thermal or electrical performance under continuous 20 A RMS load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - supports input stages up to 36 V DC bus with margin against transients in auxiliary and adapter supplies. |
| IF(AV) | 2 × 10 A - enables dual-channel 10 A output paths (e.g., dual-rail SMPS) without parallel devices. |
| VF (typ.) | 0.50 V @ 10 A, 125 °C - reduces conduction loss to ~5 W per diode at full load, improving system efficiency by ≥1.2% vs. 0.65 V alternatives. |
| Tj (max) | +175 °C - allows sustained operation in thermally constrained enclosures (e.g., game station adapters) without derating below 150 °C ambient. |
| Rth(j–c) | 2.5 °C/W per diode - permits direct mounting to PCB copper pour or small heatsink, limiting ΔT to ≤25 °C at 10 A. |
| PARM | 280 W @ tp = 10 µs - withstands short-duration surge events (e.g., inrush, line spikes) without avalanche failure. |
Pinout & Package
IPAK package: surface-mount, 3-terminal outline with exposed metal tab (cathode) for thermal and electrical connection; dimensions per DS8991 Rev 3: L = 9.0–9.6 mm, E = 6.4–6.65 mm, H = 16.1 mm typ., weight = 0.31 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (A1) | Input terminal for first diode | Accepts switched input from primary-side MOSFET in synchronous rectifier configuration. |
| Anode 2 (A2) | Input terminal for second diode | Enables independent control or paralleling of secondary-side outputs (e.g., +12 V and +5 V rails). |
| Cathode (K) | Common output node | Shared low-impedance return path; electrically and thermally connected to exposed metal tab for heatsinking. |
Key Features
| Feature | Design Value |
|---|---|
| Very small conduction losses | Conduction loss modeled as P = 0.42 × IF(AV) + 0.015 × IF²(RMS), yielding ≤5.2 W per diode at 10 A DC. |
| Avalanche specification | Rated for 280 W repetitive peak avalanche power (tp = 10 µs), enabling robustness against inductive switching transients. |
| Low forward voltage drop | 0.50 V typ. at 10 A/125 °C - 15% lower than comparable 45 V Schottkys, directly reducing heat sink size by ~20%. |
| High frequency operation | No reverse recovery charge (Qrr ≈ 0); usable up to 500 kHz in hard-switched topologies without snubbers. |
| ECOPACK®2 compliant | Halogen-free, RoHS-compliant epoxy and lead finish - meets IPC-J-STD-020D moisture sensitivity level 1 (MSL1). |
Applications
| DC/DC Converter | Battery Charger |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 65–120 W laptop adapters operating at 200–300 kHz. IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier replacing two discrete diodes to reduce footprint and thermal coupling between outputs. Use Value: Enables >92% efficiency at full load with <15 °C junction rise over ambient due to 0.50 V VF and low Rth(j–c). | Use Scenario: Dual-output charging circuit for Li-ion battery packs (e.g., 2S+1S configuration) in portable gaming stations. IC Role / Device Role / Timing Role: Common-cathode dual rectifier delivering independent 5 V and 12 V charging rails from single transformer secondary. Use Value: Eliminates cross-regulation issues and reduces BOM count by 1 vs. discrete diode solution, while maintaining <0.5 V output droop at 8 A. |
| SMPS | Desktop Power |
Use Scenario: Auxiliary 5 V/2 A standby supply in ATX PSUs using flyback topology with 65 kHz switching. IC Role / Device Role / Timing Role: Low-loss output rectifier handling both main and standby loads during transition modes. Use Value: Supports no-load to full-load efficiency >75% across 100–240 VAC input range, meeting ErP Lot 6 requirements. | Use Scenario: Main 12 V output rectification in compact SFX-L desktop PSUs with limited heatsink volume. IC Role / Device Role / Timing Role: High-current Schottky rectifier mounted directly to chassis via IPAK tab for passive cooling. Use Value: Delivers 20 A RMS with <30 °C ΔT at 50 °C ambient, avoiding forced-air cooling in space-constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS20450LDW | Same 45 V VRRM, 2 × 10 A rating, but TO-252 package (Rth(j–c) = 3.0 °C/W) and VF = 0.52 V typ. | Larger footprint and higher thermal resistance limit use in ultra-thin adapters. | Prefer when board-level reflow compatibility with DPAK is required over thermal performance. |
| Vishay VS-20CPH045 | 45 V, 20 A total (single die), TO-220AC package, VF = 0.54 V typ., no avalanche rating. | Single-anode configuration requires external cathode tie; lacks surge robustness for unregulated inputs. | Select only for cost-sensitive, non-surge-prone auxiliary rails where dual-anode isolation is unnecessary. |
Compared with NSS20450LDW and VS-20CPH045, STPS2045CH offers superior thermal performance (1.6 °C/W total Rth(j–c)), verified avalanche capability, and integrated dual-anode isolation - making it optimal for space- and reliability-critical high-frequency SMPS where thermal headroom and transient immunity are design constraints.
Availability
STPS2045CH is available at Aetrix Electronics and suitable for DC/DC converters, battery chargers, and desktop power supplies requiring stable component supply, long-term lifecycle support, and traceable ECOPACK®2-compliant sourcing.
Supply support for STPS2045CH 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The STPS series targets high-efficiency power conversion, with STPS2045CH specifically engineered for compact, high-frequency AC/DC and DC/DC applications demanding low VF, high surge tolerance, and thermal reliability in IPAK form factor.
FAQ
What is the maximum allowable case temperature for continuous operation?
The STPS2045CH supports continuous operation with case temperature (TC) up to 155 °C per diode, as specified in the absolute ratings table. At this temperature, the average forward current remains 10 A per diode. Exceeding 155 °C requires derating per Figure 2 in DS8991, and junction temperature must not exceed +175 °C under any condition.
Can STPS2045CH be used in parallel with another unit for higher current?
No - STPS2045CH is not characterized or recommended for parallel operation. Its VF mismatch between internal dies and thermal coupling through the shared cathode tab make current sharing unpredictable. For >20 A applications, use a single higher-rated device (e.g., STPS3045CG) or redesign with interleaved phases.
Is the IPAK package lead-free and RoHS-compliant?
Yes - STPS2045CH carries ECOPACK®2 certification, confirming full compliance with RoHS Directive 2011/65/EU and halogen-free requirements (IEC 61249-2-21). The device uses matte tin lead finish and lead-free solder compatible with standard Pb-free reflow profiles (J-STD-020D, peak 260 °C).
Does STPS2045CH require a heatsink in a 10 A, 125 °C ambient environment?
Yes - at 10 A per diode and 125 °C ambient, junction temperature would exceed 175 °C without heatsinking. With Rth(j–c) = 2.5 °C/W and Rth(c–a) ≤ 10 °C/W (minimum recommended heatsink), junction temperature stays at ~162 °C. A 25 mm² copper pour with 2 oz Cu and thermal vias is the minimum effective heatsink.
STPS2045CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 840 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 45 V
- Operating Temperature - Junction:
- 175°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- IPAK (TO-251)
STPS2045CH FAQ
1.How can I place an order for STPS2045CH through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS2045CH 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 STPS2045CH reliable?
The price and inventory of STPS2045CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS2045CH is usually 5 days.
3.What payment methods are accepted for STPS2045CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS2045CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS2045CH?
STPS2045CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS2045CH 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 STPS2045CH?
For technical support, including STPS2045CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS2045CH requirements.
6.How does Aetrix verify that STPS2045CH is sourced from the original manufacturer or authorized distributors?
All STPS2045CH 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 STPS2045CH meets industry standards.
7.What is the process for return or replacement of STPS2045CH?
All STPS2045CH units undergo pre-shipment inspection (PSI). If there is an issue with STPS2045CH, 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 STPS2045CH part is unused and in its original packaging.
Return procedure for STPS2045CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS2045CH Tags
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BAV99-7-F
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BAT54C-7-F
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BAV99,215
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BAT54SLT1G
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BAV70LT1G
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BAT54CLT1G
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BAT54S-7-F
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BAV99LT1G
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BAT54S,215
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MMBD1503-TP
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BAV99WT1G
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