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STMicroelectronics STPS1545CGY-TR
- Part No.:
- STPS1545CGY-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STPS1545CGY-TR.pdf
- Description:
- DIODE ARRAY SCHOT 45V 7.5A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:6,270
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Product details
Overview
STPS1545CGY-TR from STMicroelectronics is an AEC-Q101-qualified dual center-tap Schottky rectifier in D2PAK package, rated for 45 V repetitive peak reverse voltage, 7.5 A average forward current per diode at 157 °C case temperature, and 0.57 V maximum forward voltage at 7.5 A and 125 °C junction temperature. It delivers negligible switching losses and extremely fast switching for low-voltage, high-frequency DC-DC converters in automotive power systems.
For engineers reviewing the STPS1545CGY-TR datasheet, STPS1545CGY-TR pinout, STPS1545CGY-TR application, or STPS1545CGY-TR equivalent, key selection criteria include avalanche capability (2700 W at 1 µs), thermal resistance (3.0 °C/W junction-to-case per diode), dV/dt rating (10,000 V/µs), and AEC-Q101 qualification for under-hood automotive use.
Technical Context
This dual-center-tap Schottky rectifier integrates two independent anode-cathode paths sharing a common cathode terminal (K), enabling synchronous rectification and polarity protection in half-bridge and full-wave configurations. Its silicon Schottky architecture eliminates minority-carrier storage delay, supporting operation up to several MHz without reverse recovery loss.
Thermal design relies on direct die-to-case conduction via the exposed D2PAK tab, with validated Rth(j-c) = 3.0 °C/W per diode and coupling resistance of 0.35 °C/W between dies. Avalanche energy handling is specified at 2700 W for 1 µs pulses at 25 °C, derating linearly with junction temperature and pulse duration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum reverse blocking voltage before breakdown; sets upper limit for input/output rail separation in buck or flyback topologies. |
| IF(AV) per diode | 7.5 A at Tc = 157 °C - Continuous DC current capability per anode path with heatsink; defines minimum copper area and thermal interface requirements. |
| VF(max) | 0.57 V at IF = 7.5 A, Tj = 125 °C - Worst-case forward drop determining conduction loss (P ≈ 0.42×I + 0.020×I²) and thermal rise. |
| Rth(j-c) per diode | 3.0 °C/W - Junction-to-case thermal resistance; enables accurate die temperature estimation from measured case temperature. |
| dV/dt rating | 10,000 V/µs - Critical rate of rise of reverse voltage; ensures stable operation during fast-switching transients in synchronous rectifiers. |
| Avalanche energy | 2700 W at tp = 1 µs, Tj = 25 °C - Single-pulse non-repetitive surge capability; supports transient overvoltage clamping without failure. |
| IFSM | 150 A at tp = 10 ms, sinusoidal - Non-repetitive surge current rating; validates robustness against inrush or short-circuit events. |
Pinout & Package
Package: D2PAK (TO-263-3), surface-mount, lead-free, UL94 V0 epoxy, with exposed metal tab serving as thermal and electrical cathode connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | First Schottky diode anode; connects to high-side switch node in center-tapped transformer or half-bridge output. |
| A2 | Anode 2 | Second Schottky diode anode; connects to complementary switch node for full-wave or dual-output rectification. |
| K | Common Cathode | Shared cathode terminal tied to output rail or ground reference; serves as primary thermal path to PCB copper pour or heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control units and ADAS power supplies. |
| Dual center-tap configuration | Enables compact full-wave rectification without external center-tapped inductor; reduces component count vs. discrete dual-diode solutions. |
| Negligible switching losses | Zero reverse recovery charge (Qrr ≈ 0) eliminates turn-off loss and EMI associated with PN diodes. |
| Avalanche capability | Specified 2700 W single-pulse energy absorption protects against inductive kickback in motor drive and converter freewheeling paths. |
| High dV/dt immunity | 10,000 V/µs rating prevents spurious turn-on during fast voltage transients in high-speed gate-drive circuits. |
Applications
| Automotive DC-DC Converters | Low-Voltage Inverters |
|---|---|
|
Use Scenario: 12 V to 5 V/3.3 V step-down conversion in vehicle infotainment and body control modules. IC Role / Device Role / Timing Role: Output rectifier in synchronous buck converter operating at 300–500 kHz. Use Value: 0.57 V VF minimizes conduction loss at 7.5 A load, improving efficiency by >2% vs. standard PN diodes. |
Use Scenario: 24 V to 400 V boost stage in electric power steering (EPS) auxiliary inverters. IC Role / Device Role / Timing Role: Freewheeling diode across high-side MOSFET in hard-switched boost topology. Use Value: 10,000 V/µs dV/dt rating prevents false triggering during 100 ns gate transitions. |
| Polarity Protection Circuits | High-Frequency SMPS Outputs |
|
Use Scenario: Reverse-voltage protection at battery input of automotive telematics control units (TCUs). IC Role / Device Role / Timing Role: Series-connected Schottky diode with cathode to load, anode to battery. Use Value: 45 V VRRM withstands load-dump transients up to ISO 7637-2 Pulse 5a (±120 V), with <100 µA leakage at 125 °C. |
Use Scenario: Secondary-side rectification in 1 MHz+ LLC resonant converters for ADAS camera modules. IC Role / Device Role / Timing Role: Dual-path synchronous rectifier replacing two discrete Schottkys to reduce layout parasitics. Use Value: Dual center-tap structure cuts interconnect inductance by ~40%, lowering voltage overshoot during zero-current switching transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-15BQ040-M3/45 | Single-anode Schottky, 40 V VRRM, 15 A IF(AV), TO-220AC package, no AEC-Q101 rating. | Lacks dual center-tap configuration and automotive qualification; requires two devices for equivalent functionality. | Use only in non-automotive industrial supplies where space and qualification are not constraints. |
| ON Semiconductor MBR1545CT | 45 V VRRM, 7.5 A per diode, TO-220AB package, AEC-Q101 qualified, but higher VF (0.65 V typ. at 7.5 A). | Same electrical ratings but larger footprint and 0.08 V higher typical forward drop increases conduction loss by ~11%. | Prefer when D2PAK mounting is incompatible with mechanical constraints, accepting minor efficiency penalty. |
Compared with VS-15BQ040-M3/45 and MBR1545CT, STPS1545CGY-TR uniquely combines dual center-tap topology, AEC-Q101 compliance, D2PAK thermal performance, and lowest VF in its class-enabling smaller, cooler, and automotive-compliant power stages.
Availability
STPS1545CGY-TR is available at Aetrix Electronics and suitable for automotive DC-DC converters, low-voltage inverters, and polarity protection circuits requiring stable component supply, AEC-Q101 qualification, and high-reliability Schottky performance.
Supply support for STPS1545CGY-TR 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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.
STPS1545CGY-TR belongs to ST's automotive-grade Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in harsh-temperature automotive environments.
FAQ
What is the thermal resistance from junction to case for each diode in STPS1545CGY-TR?
The datasheet specifies Rth(j-c) = 3.0 °C/W per diode, measured from each die to the common D2PAK case surface. This value assumes proper soldering of the exposed tab to ≥10 cm² of 35 µm copper on FR-4 PCB. Coupling resistance between dies is 0.35 °C/W, critical for multi-diode thermal modeling.
Is STPS1545CGY-TR suitable for synchronous rectification in a 1 MHz LLC converter?
Yes-its negligible reverse recovery charge and 0.57 V VF at 125 °C enable efficient synchronous rectification at 1 MHz. Layout must minimize loop inductance between A1/A2 and K terminals; the dual center-tap structure reduces stray inductance versus discrete diodes, lowering voltage spikes during commutation.
How does the avalanche rating of STPS1545CGY-TR compare to standard Schottky diodes?
Unlike most Schottky diodes, STPS1545CGY-TR has a fully specified avalanche capability: 2700 W at 1 µs pulse width and 25 °C. This allows safe clamping of inductive energy in freewheeling paths without external TVS, validated per AEC-Q101 stress test conditions.
Can STPS1545CGY-TR replace two separate STPS745D diodes in a design?
No-STPS745D is a single-diode DPAK device (45 V, 7.5 A). STPS1545CGY-TR integrates two matched diodes in one D2PAK with shared cathode, offering superior thermal coupling and reduced board area. Direct replacement requires verifying layout compatibility with the larger D2PAK footprint and updated thermal pad design.
STPS1545CGY-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -40°C ~ 175°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
STPS1545CGY-TR FAQ
1.How can I place an order for STPS1545CGY-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS1545CGY-TR 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 STPS1545CGY-TR reliable?
The price and inventory of STPS1545CGY-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1545CGY-TR is usually 5 days.
3.What payment methods are accepted for STPS1545CGY-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1545CGY-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS1545CGY-TR?
STPS1545CGY-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS1545CGY-TR 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 STPS1545CGY-TR?
For technical support, including STPS1545CGY-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1545CGY-TR requirements.
6.How does Aetrix verify that STPS1545CGY-TR is sourced from the original manufacturer or authorized distributors?
All STPS1545CGY-TR 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 STPS1545CGY-TR meets industry standards.
7.What is the process for return or replacement of STPS1545CGY-TR?
All STPS1545CGY-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS1545CGY-TR, 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 STPS1545CGY-TR part is unused and in its original packaging.
Return procedure for STPS1545CGY-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS1545CGY-TR Tags
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BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
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BAT54CLT1G
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
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