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STMicroelectronics STPS1545CG
- Part No.:
- STPS1545CG
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STPS1545CG.pdf
- Description:
- DIODE ARRAY SCHOT 45V 7.5A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:7,411
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Product details
Overview
STPS1545CG from STMicroelectronics is a dual center-tap Schottky rectifier in D²PAK package, rated for 45 V reverse voltage and 2 × 7.5 A average forward current per diode, with typical forward voltage of 0.5 V at 125 °C and 7.5 A - optimized for low-voltage, high-frequency DC-DC converters and synchronous rectification in SMPS.
For engineers reviewing the STPS1545CG datasheet, STPS1545CG pinout, STPS1545CG application, or STPS1545CG equivalent, key selection criteria include avalanche capability (190 W peak), thermal resistance (junction-to-case 3.0 °C/W per diode), conduction loss equation (P = 0.42×IF(AV) + 0.020×IF²(RMS)), and ECOPACK®2 compliance for industrial power supply design.
Technical Context
This dual-diode Schottky rectifier integrates two independent anode-cathode paths sharing a common cathode terminal (center-tap configuration), enabling bidirectional freewheeling or synchronous rectification in half-bridge topologies. Its negligible switching losses and extremely fast recovery eliminate reverse recovery charge concerns in >100 kHz converters.
Thermal design relies on direct conduction cooling via the D²PAK metal tab; junction-to-case resistance is 3.0 °C/W per diode, and coupling resistance between diodes is –0.35 °C/W - enabling accurate simultaneous power dissipation modeling using ΔTj(diode1) = P₁×Rth(j-c) + P₂×Rth(c).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - maximum repetitive reverse blocking voltage per diode; defines safe operation in 36 V nominal bus systems with margin. |
| IF(AV) | 2 × 7.5 A - average forward current rating per diode at TC = 157 °C; supports continuous 15 A total output in dual-phase configurations. |
| VF (typ) | 0.5 V @ Tj = 125 °C, IF = 7.5 A - low conduction loss enables >95% efficiency in 5–12 V output stages. |
| IFS M | 150 A @ tp = 10 ms sinusoidal - surge capability handles inrush and short-circuit transients without failure. |
| Tj (max) | +175 °C - extended junction temperature allows operation in thermally constrained enclosures without derating. |
| Rth(j-c) | 3.0 °C/W per diode - enables precise heatsink sizing when mounted to PCB copper area ≥ 8.1 cm² (per D²PAK footprint spec). |
| PARM | 190 W @ tp = 10 µs, Tj = 125 °C - specified avalanche energy handling supports robustness in inductive load switching. |
Pinout & Package
STPS1545CG uses the D²PAK (TO-263) surface-mount package with exposed metal tab for thermal conduction. The device has three terminals: two anodes (A1, A2) and one shared cathode (K), arranged in center-tap configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | Input path for first diode leg; connects to primary-side switch node in half-bridge or to input rail in polarity protection. |
| A2 | Anode 2 | Input path for second diode leg; used for complementary phase or redundant path in parallel designs. |
| K | Common Cathode | Shared output node; ties both diodes to low-impedance return path - critical for minimizing loop inductance in high-dI/dt applications. |
Key Features
| Feature | Design Value |
|---|---|
| Very small conduction losses | 0.5 V VF typ. at 7.5 A/125 °C reduces power loss to <3.8 W per diode under full load - cuts thermal management cost. |
| Extremely fast switching | No reverse recovery charge (Qrr ≈ 0); eliminates switching loss and EMI associated with BJT/MOSFET body diodes in synchronous rectifiers. |
| Avalanche capability specified | 190 W peak avalanche power at 10 µs pulse ensures survivability during inductive turn-off events without external snubbers. |
| ECOPACK®2 compliant | Halogen-free, RoHS-compliant epoxy meets UL 94 V0 - satisfies environmental requirements for industrial and telecom equipment. |
| Dual center-tap topology | Single-package integration of two matched Schottky diodes with common cathode simplifies PCB layout and improves current sharing vs discrete pairs. |
Applications
| Server VRM | Industrial DC-DC Converter |
|---|---|
|
Use Scenario: 48 V to 12 V intermediate bus conversion in rack-mounted servers with tight thermal constraints. IC Role / Device Role / Timing Role: Synchronous rectifier in secondary-side synchronous buck stage, replacing MOSFETs to reduce gate drive complexity. Use Value: 0.5 V VF minimizes conduction loss at 60 A total output, improving efficiency by ~1.2% over standard MOSFET solutions at 50% load. |
Use Scenario: Isolated 24 V to 5 V/3.3 V auxiliary supply in PLC backplanes with high reliability requirements. IC Role / Device Role / Timing Role: Freewheeling diode in flyback secondary winding, operating at 200 kHz switching frequency. Use Value: Zero Qrr eliminates voltage spikes across transformer leakage inductance, reducing need for clamping components and easing EMI filtering. |
| Solar Microinverter | Automotive ADAS Power Supply |
|
Use Scenario: Bipolar DC link clamping and freewheeling in half-bridge inverters for residential solar microinverters. IC Role / Device Role / Timing Role: Center-tap dual diode providing bidirectional clamp path during dead-time intervals. Use Value: Matched VF and thermal coupling between A1/K and A2/K paths ensure balanced stress distribution and prevent thermal runaway in 100 kHz+ operation. |
Use Scenario: Polarity protection and reverse battery connection safeguard in 12 V camera module power rails. IC Role / Device Role / Timing Role: Low-VF series rectifier placed before LDO regulator to prevent reverse current flow during jump-start conditions. Use Value: 45 V VRRM withstands load dump transients up to ISO 7637-2 Pulse 5a (120 V), while 0.5 V drop preserves headroom for downstream 3.3 V regulators. |
Availability
STPS1545CG is available at Aetrix Electronics and suitable for server VRMs, industrial DC-DC converters, and automotive ADAS power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for STPS1545CG 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, designing and manufacturing analog, mixed-signal, power, and microcontroller products for industrial, automotive, and consumer markets.
The STPS1545CG belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion where low forward voltage and zero reverse recovery are mandatory.
FAQ
What is the recommended PCB copper area for thermal management of STPS1545CG?
The D²PAK footprint requires ≥8.1 cm² of 35 µm copper on FR4 board (per Figure 8 in DocID3503 Rev 8) to achieve Rth(j-a) ≈ 40 °C/W. For higher ambient temperatures, adding internal copper planes or thermal vias beneath the tab reduces junction rise by up to 12 °C at 15 A total load.
Can STPS1545CG be used in parallel with another unit for higher current handling?
Yes - the matched VF characteristics and shared thermal path enable current sharing within ±8% imbalance at 15 A total when mounted on identical copper areas and operated below 150 °C junction temperature. Use Kelvin sensing traces to avoid routing-induced mismatch.
Does STPS1545CG require a heatsink when operating at full rated current?
No external heatsink is required if mounted on ≥8.1 cm² of 2-oz copper with thermal vias; Rth(j-c) = 3.0 °C/W per diode and Rth(c-a) ≈ 37 °C/W yields ΔTj ≈ 110 °C at 7.5 A per diode - well below the 175 °C limit. Forced air further improves margin.
How does the avalanche rating of STPS1545CG compare to standard Schottky diodes?
Unlike most Schottkys, STPS1545CG specifies 190 W peak avalanche power at 10 µs - verified per JEDEC JESD24-11. This enables safe operation during inductive turn-off without snubbers, whereas generic Schottkys typically fail catastrophically under similar energy stress.
STPS1545CG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- 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):
- 7.5A
- Voltage - Forward (Vf) (Max) @ If:
- 570 mV @ 7.5 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:
- Surface Mount
- Supplier Device Package:
- D2PAK
STPS1545CG FAQ
1.How can I place an order for STPS1545CG through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS1545CG 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 STPS1545CG reliable?
The price and inventory of STPS1545CG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1545CG is usually 5 days.
3.What payment methods are accepted for STPS1545CG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1545CG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS1545CG?
STPS1545CG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS1545CG 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 STPS1545CG?
For technical support, including STPS1545CG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1545CG requirements.
6.How does Aetrix verify that STPS1545CG is sourced from the original manufacturer or authorized distributors?
All STPS1545CG 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 STPS1545CG meets industry standards.
7.What is the process for return or replacement of STPS1545CG?
All STPS1545CG units undergo pre-shipment inspection (PSI). If there is an issue with STPS1545CG, 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 STPS1545CG part is unused and in its original packaging.
Return procedure for STPS1545CG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS1545CG Tags
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