My Inquiry
My Account
STMicroelectronics STPS1545CG-TR
- Part No.:
- STPS1545CG-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
STPS1545CG-TR.pdf
- Description:
- DIODE ARRAY SCHOT 45V 7.5A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:2,140
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STPS1545CG-TR from STMicroelectronics is a dual center-tap Schottky rectifier optimized for high-frequency DC-DC converters and switch-mode power supplies, featuring 45 V reverse voltage rating, 2 × 7.5 A average forward current per diode, 0.5 V typical forward voltage at 125 °C/7.5 A, and 175 °C maximum junction temperature - deployed in low-voltage inverters and polarity protection circuits.
For engineers reviewing the STPS1545CG-TR datasheet, STPS1545CG-TR pinout, STPS1545CG-TR application, or STPS1545CG-TR equivalent, key selection criteria include conduction loss modeling (P = 0.42 × IF(AV) + 0.020 × IF²(RMS)), avalanche capability (190 W peak, 10 µs), thermal resistance (Rth(j-c) = 3.0 °C/W per diode), and D²PAK package suitability for surface-mount heatsinking.
Technical Context
This dual-diode Schottky rectifier integrates two independent anode-cathode paths sharing a common cathode terminal (center-tap configuration), enabling synchronous rectification or dual-output flyback topologies. Its negligible switching losses and extremely fast recovery eliminate snubber requirements in >100 kHz designs.
Designed for thermally demanding environments, it supports simultaneous conduction of both diodes with coupled thermal impedance (Rth(c) = –0.35 °C/W), requiring derating per ΔTj(diode1) = P(diode1) × 3.0 + P(diode2) × (–0.35), and specifies avalanche energy handling up to 190 W at Tj = 125 °C for transient surge resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking voltage; defines safe operating range in buck, flyback, or polarity protection circuits. |
| IF(AV) per diode | 7.5 A - Continuous DC current capability per diode at TC = 157 °C; enables compact 15 A dual-output rectification without parallel devices. |
| VF (typ) | 0.5 V at Tj = 125 °C, IF = 7.5 A - Low forward drop minimizes conduction loss (≈3.75 W per diode at full load), critical for <12 V output rails. |
| Rth(j-c) per diode | 3.0 °C/W - Junction-to-case thermal resistance; allows direct heatsink mounting via D²PAK tab for efficient thermal management. |
| IFSM | 150 A (10 ms sinusoidal) - Non-repetitive surge rating; supports inrush current handling in AC-DC front-ends and motor drive freewheeling. |
| Tj (max) | +175 °C - Maximum junction temperature; enables operation in sealed industrial enclosures or under sustained thermal stress. |
| PARM | 190 W (tp = 10 µs, Tj = 125 °C) - Repetitive avalanche power rating; provides robustness against inductive switching transients without external clamping. |
Pinout & Package
D²PAK (TO-263) surface-mount package with exposed metal thermal pad (cathode connection), 3-terminal configuration optimized for PCB heatsinking and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | Input terminal for first Schottky diode path; connects to primary-side switching node in half-bridge or flyback secondary. |
| A2 | Anode 2 | Input terminal for second Schottky diode path; enables dual-output or interleaved rectification topologies. |
| K | Common Cathode | Shared output terminal; ties both diodes to low-impedance return path; electrically and thermally connected to exposed D²PAK tab. |
Key Features
| Feature | Design Value |
|---|---|
| Very small conduction losses | 0.5 V VF (typ) at 7.5 A/125 °C reduces power dissipation by >40% vs. standard silicon rectifiers in 5–12 V outputs. |
| Extremely fast switching | No reverse recovery charge (Qrr ≈ 0); eliminates switching loss and EMI in >200 kHz SMPS designs without snubbers. |
| Avalanche capability specified | 190 W peak avalanche power (10 µs) enables reliable operation during MOSFET turn-off overshoot in hard-switched converters. |
| ECOPACK®2 compliance | Halogen-free, RoHS-compliant epoxy meets UL 94 V0; supports environmental requirements for industrial and telecom equipment. |
Applications
| Server VRM | Industrial DC-DC Converter |
|---|---|
Use Scenario: Point-of-load regulation in 48 V to 12 V/5 V server power delivery networks with high current density. IC Role / Device Role / Timing Role: Dual-output synchronous rectifier replacing discrete diodes in multiphase buck converters. Use Value: 0.5 V VF reduces conduction loss by ~2.25 W per diode versus 0.7 V alternatives, lowering thermal footprint in constrained 1U chassis. |
Use Scenario: Isolated 24 V input to ±15 V dual-rail supply for PLC I/O modules with tight thermal margins. IC Role / Device Role / Timing Role: Center-tap rectifier in forward converter secondary, delivering split-rail outputs with shared cathode return. Use Value: Coupled thermal impedance (–0.35 °C/W) enables balanced junction temperature rise across both diodes under asymmetric loading. |
| Solar Microinverter | Automotive Body Control Module |
Use Scenario: High-frequency DC-DC stage stepping down PV string voltage (30–60 V) to 12 V battery interface. IC Role / Device Role / Timing Role: Freewheeling diode in interleaved boost converter, handling bidirectional current during MPPT transitions. Use Value: 150 A IFSM withstands solar panel short-circuit surges; 175 °C Tj rating sustains operation in unventilated rooftop enclosures. |
Use Scenario: Reverse-polarity protection and load-dump suppression in 12 V automotive ECUs with CAN/LIN interfaces. IC Role / Device Role / Timing Role: Dual-anode clamp protecting microcontroller power rails from battery reversal and ISO 7637-2 pulse 5a transients. Use Value: Specified avalanche capability absorbs 190 W transient energy without failure, eliminating need for external TVS diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS1545CR | I²PAK package (through-hole mount), Rth(j-c) = 3.0 °C/W same, but requires manual soldering and larger board area. | Preferred for prototyping or low-volume industrial controls where reworkability and mechanical stability outweigh SMT efficiency. | Select when thermal interface reliability under vibration is prioritized over automated assembly throughput. |
| MBR1545CT | Single-center-tap dual-diode Schottky (same VRRM/IF(AV)), but VF = 0.65 V (typ) at 7.5 A/125 °C and no specified avalanche rating. | Lacks avalanche energy specification; unsuitable for inductive switching or surge-prone environments like motor drives. | Choose only for cost-sensitive, non-surge applications where 0.15 V higher VF is acceptable and thermal margin exceeds 10 °C. |
Compared with STPS1545CR and MBR1545CT, STPS1545CG-TR uniquely combines D²PAK SMT compatibility, guaranteed 190 W avalanche performance, and lowest VF among ST's 45 V dual Schottky offerings - making it optimal for high-reliability, high-density power conversion.
Availability
STPS1545CG-TR is available at Aetrix Electronics and suitable for server VRMs, industrial DC-DC converters, and solar microinverters requiring stable component supply, long-term lifecycle support, and tape-and-reel packaging for high-speed SMT lines.
Supply support for STPS1545CG-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 analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
ST's Power Schottky Rectifier product line targets high-efficiency, high-frequency power conversion - specifically engineered to replace conventional diodes in SMPS, inverters, and freewheeling applications where low VF and zero Qrr are critical.
FAQ
What is the correct thermal design approach for STPS1545CG-TR in D²PAK?
Mount the exposed cathode tab directly to a copper heatsink area ≥8.6 mm × 10.0 mm on FR4 PCB, using thermal vias and solder paste. Derate total power based on measured ambient temperature and airflow; use ΔTj(diode1) = P1 × 3.0 + P2 × (–0.35) when both diodes conduct simultaneously. Avoid insulating pads between tab and copper.
Can STPS1545CG-TR be used in place of a single-diode Schottky like STPS10H100CG?
No - STPS1545CG-TR is a dual-anode, common-cathode device with center-tap topology; it cannot substitute for single-diode packages without circuit redesign. Its A1/A2 terminals must connect to separate switching nodes, while K serves as the sole output. Interchange requires verifying layout compatibility and thermal coupling effects.
Does STPS1545CG-TR require a gate driver or control signal?
No - it is a passive power diode with no control inputs. Conduction occurs automatically when anode voltage exceeds cathode voltage by >0.5 V. It operates without biasing, timing signals, or external drivers, functioning solely as a unidirectional current valve in rectification or clamping roles.
How does the negative coupling thermal resistance (Rth(c) = –0.35 °C/W) affect reliability testing?
This value indicates thermal coupling between diodes: heating one diode lowers the effective thermal resistance seen by the other. During burn-in or life testing, apply worst-case asymmetric loading (e.g., 100% on A1, 0% on A2) to ensure junction temperature stays ≤175 °C under all operational modes - not just balanced conditions.
STPS1545CG-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:
- 175°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
STPS1545CG-TR FAQ
1.How can I place an order for STPS1545CG-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS1545CG-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 STPS1545CG-TR reliable?
The price and inventory of STPS1545CG-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS1545CG-TR is usually 5 days.
3.What payment methods are accepted for STPS1545CG-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS1545CG-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS1545CG-TR?
STPS1545CG-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS1545CG-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 STPS1545CG-TR?
For technical support, including STPS1545CG-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS1545CG-TR requirements.
6.How does Aetrix verify that STPS1545CG-TR is sourced from the original manufacturer or authorized distributors?
All STPS1545CG-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 STPS1545CG-TR meets industry standards.
7.What is the process for return or replacement of STPS1545CG-TR?
All STPS1545CG-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS1545CG-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 STPS1545CG-TR part is unused and in its original packaging.
Return procedure for STPS1545CG-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPS1545CG-TR Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
