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Diodes Incorporated 2DA1797-13
- Part No.:
- 2DA1797-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
2DA1797-13.pdf
- Description:
- TRANS PNP 50V 3A SOT-89-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
2DA1797-13 from Diodes Incorporated is a PNP medium-power bipolar junction transistor in SOT89 package, rated for -50V VCEO, -3A continuous collector current, and 160MHz fT, used in DC-DC converter switching stages and linear voltage regulator pass elements in industrial power supplies.
For engineers reviewing the 2DA1797-13 datasheet, 2DA1797-13 pinout, 2DA1797-13 application, or 2DA1797-13 equivalent, key selection considerations include VCEO derating at elevated temperature, thermal resistance to lead (5.3°C/W), SOT89 pad layout compliance, and complementary NPN pairing with 2DC4672.
Technical Context
This PNP transistor operates in active and saturation regions for medium-power linear regulation and hard-switched PWM control. Its -50V breakdown rating supports 24V and 48V bus applications with margin, while the 160MHz fT enables stable operation up to ~10MHz switching frequencies under moderate load conditions.
Thermal performance is defined by two mounting conditions: 139°C/W on minimal FR-4 pads and 62.5°C/W with 1-inch² copper, with direct thermal path via exposed collector pad (RθJL = 5.3°C/W). ESD robustness includes 4kV HBM and 1kV CDM ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -50 V - Supports 24V/48V systems with ≥2× voltage margin against transients |
| IC (cont.) | -3 A - Enables 2.5A load delivery with 17% thermal headroom at TA = 70°C |
| fT | 160 MHz - Sufficient for feedback loop compensation in <10MHz DC-DC controllers |
| VCE(sat) | -100 to -350 mV @ IC = -1A, IB = -50mA - Low conduction loss in saturated switch mode |
| hFE | 82–270 @ VCE = -2V, IC = -500mA - Ensures reliable base drive design across process variation |
| RθJL | 5.3 °C/W - Enables direct thermal coupling to PCB copper pour for high-reliability power staging |
Pinout & Package
Package: SOT89 - Surface-mount plastic package with exposed collector tab for thermal dissipation; 0.055g mass; UL 94V-0 rated molding compound; matte tin finish leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal | Connected to positive rail in high-side switch; requires low-inductance trace for fast turn-off |
| 2 (Base) | Control input | Driven by resistor-limited digital or analog signal; 50mA peak drive needed for full saturation |
| 3 (Collector) | Current sink / thermal path | Exposed metal pad soldered to PCB copper; primary thermal conduction path to board |
Key Features
| Feature | Design Value |
|---|---|
| Automated assembly compatibility | SOT89 footprint and lead geometry qualified for pick-and-place and reflow per J-STD-020 Level 1 moisture sensitivity |
| Lead-free & green compliance | Fully RoHS 3 compliant; <900ppm Br/Cl, <1000ppm Sb; no antimony or halogen compounds |
| Complementary NPN pairing | Direct functional match with 2DC4672 for push-pull and H-bridge output stages |
| High ESD robustness | 4kV HBM and 1kV CDM ratings reduce risk of handling damage in manufacturing and field service |
Applications
| Industrial DC-DC Converters | Linear Voltage Regulators |
|---|---|
Use Scenario: Step-down conversion in programmable power supplies for PLC I/O modules. IC Role / Device Role / Timing Role: PNP pass transistor in adjustable series regulator topology, operating in linear region. Use Value: Low VCE(sat) minimizes dropout voltage; RθJL = 5.3°C/W enables stable 2.5A output without heatsink at 70°C ambient. |
Use Scenario: Post-regulation stage in 5V/3.3V distributed power architecture for sensor nodes. IC Role / Device Role / Timing Role: Medium-power emitter-follower buffer between controller IC and load. Use Value: hFE range (82–270) ensures predictable base current demand; -50V rating accommodates 24V input surges. |
| Motor Driver Pre-Drivers | LED Constant-Current Drivers |
Use Scenario: High-side pre-driver for N-channel MOSFET gate control in 24V BLDC motor controllers. IC Role / Device Role / Timing Role: Saturated switch enabling fast gate charging via low-impedance path. Use Value: -6A ICM supports 10μs pulse gate drive; fT > 100MHz ensures clean edge fidelity. |
Use Scenario: Constant-current sink for high-brightness LED strings in signage and lighting fixtures. IC Role / Device Role / Timing Role: Linear current regulator with external sense resistor feedback. Use Value: Tight VCE(sat) tolerance (-100 to -350 mV) maintains ±3% current accuracy across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD2955G | -60V VCEO, -5A IC, higher RθJA (150°C/W on minimal pad) | Higher voltage margin but lower fT (3MHz); unsuitable for >1MHz switching | Prefer for 48V+ systems needing extra transient headroom; avoid where bandwidth or thermal efficiency is critical |
| 2SA1020-GR | -100V VCEO, -2A IC, TO-220 package, no exposed thermal pad | Lower current rating, larger footprint, no SMT thermal path; requires heatsink above 1.2A | Select only when legacy TO-220 layout must be retained; not drop-in for SOT89 space-constrained designs |
Compared with MJD2955G and 2SA1020-GR, the 2DA1797-13 delivers superior thermal efficiency in SMT layouts, higher small-signal bandwidth, and tighter VCE(sat) control-making it optimal for compact, high-frequency, medium-current linear and switching roles.
Availability
2DA1797-13 is available at Aetrix Electronics and suitable for industrial DC-DC converters, linear voltage regulators, and motor driver pre-drivers requiring stable component supply, RoHS 3 compliance, and automotive-grade reliability variants (2DA1797Q).
Supply support for 2DA1797-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial and automotive markets.
The 2DA1797 belongs to Diodes' medium-power bipolar transistor product line, engineered for robust switching and linear regulation in space-constrained, thermally demanding power stages.
FAQ
What is the maximum safe operating temperature for 2DA1797-13 in a typical SOT89 PCB layout?
The device supports junction temperatures from -55°C to +150°C. With RθJA = 139°C/W on minimal pads, sustained 3A operation requires ambient ≤55°C; using 1-inch² copper reduces thermal resistance to 62.5°C/W, enabling full current at 70°C ambient.
Can 2DA1797-13 be used as a direct replacement for 2N2907 in existing designs?
No-2N2907 is TO-18 packaged with lower current (−600mA) and voltage (−60V) ratings. While both are PNP, 2DA1797-13 offers −3A/−50V in SOT89, requiring PCB layout revision, thermal validation, and base drive recalculation due to higher hFE and fT.
Does the 2DA1797-13 require a heatsink in standard SMT applications?
Not for ≤2.5A continuous operation with proper 1-inch² copper pad: its RθJL = 5.3°C/W provides sufficient thermal conduction. Heatsinking is unnecessary unless ambient exceeds 75°C or pulsed IC exceeds −4.5A repeatedly.
How does the "Green" designation impact PCB assembly processes?
The halogen- and antimony-free molding compound meets IPC-J-STD-020 moisture sensitivity Level 1 and eliminates corrosive residue risks during reflow. It requires no special solder profile-standard SnPb or lead-free profiles apply without dewetting or voiding concerns.
2DA1797-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Vce Saturation (Max) @ Ib, Ic:
- 350mV @ 50mA, 1A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 82 @ 500mA, 2V
- Power - Max:
- 900 mW
- Frequency - Transition:
- 160MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
2DA1797-13 FAQ
1.How can I place an order for 2DA1797-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 2DA1797-13 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 2DA1797-13 reliable?
The price and inventory of 2DA1797-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2DA1797-13 is usually 5 days.
3.What payment methods are accepted for 2DA1797-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2DA1797-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2DA1797-13?
2DA1797-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2DA1797-13 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 2DA1797-13?
For technical support, including 2DA1797-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2DA1797-13 requirements.
6.How does Aetrix verify that 2DA1797-13 is sourced from the original manufacturer or authorized distributors?
All 2DA1797-13 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 2DA1797-13 meets industry standards.
7.What is the process for return or replacement of 2DA1797-13?
All 2DA1797-13 units undergo pre-shipment inspection (PSI). If there is an issue with 2DA1797-13, 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 2DA1797-13 part is unused and in its original packaging.
Return procedure for 2DA1797-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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