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onsemi TN8D41A-HB11-E
- Part No.:
- TN8D41A-HB11-E
- Manufacturer:
- onsemi
- Package:
- TO-220-5 Full Pack, Formed Leads
- Datasheet:
-
TN8D41A-HB11-E.pdf
- Description:
- IC REG BUCK 5V 8A TO220F5I5H-HB
- Quantity:
- Payment:
- Shipping:
Inventory:4,951
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Product details
Overview
TN8D41A-HB11-E from SANYO Semiconductor is a monolithic, vertically integrated P-channel power MOSFET-based step-down switching regulator IC delivering regulated 5 V output at up to 8 A. It integrates over-current, under-voltage, and over-temperature protection with self-recovery, soft-start (capacitor-programmable), and standby-mode control via the SS pin. Designed for industrial DC-DC conversion in 10–40 V input systems.
For engineers reviewing the TN8D41A-HB11-E datasheet, pinout, applications, or equivalent options, key selection criteria include its 80 mΩ RDS(on), 120–180 kHz switching frequency, 5 V ±1.6% output accuracy, built-in thermal shutdown threshold at 165 °C, and TO-220FI5H-HB package with exposed drain pad for thermal management.
Technical Context
The TN8D41A-HB11-E implements a separately excited buck topology using an internal vertical P-ch MOSFET as the main power switch, driven by an oscillator and error amplifier referenced to a bandgap voltage. Its feedback loop uses the FB pin to regulate output voltage via external resistor divider, while the SS pin controls both soft-start ramp time and active-low standby enable.
Protection functions operate independently: over-current sensing is current-mode based with 8.1–16 A trip threshold; under-voltage lockout activates below 7.2–8.8 V with 1.0 V hysteresis; over-temperature protection triggers at 165 °C junction temperature and releases at 140 °C. All protections feature self-recovery without latch.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±1.6% (4.88–5.16 V) - tightly regulated for logic supply rails |
| Max Output Current | 8 A continuous - supports high-power embedded loads without external MOSFET |
| RDS(on) | 80 mΩ - enables low conduction loss and >88% efficiency at 3 A |
| Switching Frequency | 120–180 kHz - balances EMI, inductor size, and MOSFET switching loss |
| Input Voltage Range | 10–40 V operating / 57 V absolute max - compatible with 12/24/36 V industrial buses |
| Thermal Shutdown | 165 °C trip / 140 °C release - hysteresis prevents oscillation near limit |
| Soft-Start Time | Externally capacitor-programmable - prevents inrush current during power-up |
Pinout & Package
Package: TO-220FI5H-HB - thermally enhanced 5-pin through-hole package with isolated tab (drain-connected) and 20 W power dissipation capability at Tc = 25 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN | Power input supply rail | Accepts 10–40 V nominal; withstands up to 57 V transient; connects to bulk input capacitor |
| 2: GND | Power and signal reference ground | Common return for internal circuitry, feedback, and soft-start; must be low-impedance |
| 3: SWOUT | Switch node output | Drain of internal P-ch MOSFET; drives external choke and catch diode in buck topology |
| 4: FB | Voltage feedback input | Resistor-divider sense point for output regulation; 5–30 V absolute max rating per output type |
| 5: SS | Soft-start and standby control | Capacitor connection for startup ramp; <0.3 V enables standby mode (output off) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-ch MOSFET | Vertical structure with 80 mΩ RDS(on) and –60 V VDSS - eliminates external high-side switch |
| Self-recovering OCP | Trips at 8.1–16 A (pulse/DC dependent); resets automatically after fault clears - no manual reset needed |
| UVLO with hysteresis | Turns on at 7.2–8.8 V, turns off at 8.1–9.9 V - prevents erratic operation near brownout thresholds |
| Standby mode control | Active-low enable via SS pin (<0.3 V) - reduces quiescent current to 500 μA for system-level power gating |
| Capacitor-programmable soft start | External capacitor sets ramp time - avoids output overshoot and inrush stress on downstream capacitors |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Primary 5 V rail generation from 24 V battery or 36 V industrial bus in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Step-down regulator IC providing stable 5 V for microcontroller, I/O drivers, and communication interfaces. Use Value: Integrated MOSFET and protection eliminate discrete BOM items; 8 A output supports multiple peripheral loads without derating. | Use Scenario: Centralized 5 V supply for body electronics including door modules, lighting controllers, and sensor hubs in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Regulated DC-DC converter with UVLO and thermal protection for automotive-grade reliability. Use Value: Self-recovering OCP and 165 °C thermal shutdown meet AEC-Q100 functional safety expectations for non-safety-critical subsystems. |
| Telecom Remote Radio Unit | Factory Automation HMI Panel |
Use Scenario: Compact 5 V supply in outdoor RRUs where ambient temperature ranges from –25 °C to +85 °C and board space is constrained. IC Role / Device Role / Timing Role: High-efficiency buck regulator with soft-start to manage inrush into large FPGA and RF IC decoupling networks. Use Value: 88% efficiency at 3 A and TO-220FI5H-HB package enable passive cooling in sealed enclosures. | Use Scenario: Main 5 V rail for touch-screen HMIs powered from 24 V factory DC bus, requiring robustness against voltage transients and load surges. IC Role / Device Role / Timing Role: Protected switching regulator with standby mode for display backlight dimming and sleep-state power reduction. Use Value: SS pin enables synchronized system-level power sequencing; under-voltage hysteresis prevents flicker during line sags. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54302DDAR | 3.5–28 V input, 3 A output, external N-ch MOSFET required, no integrated OCP/OTP | Lacks self-recovering protection; requires external current-sense and thermal monitoring circuits | Choose when higher switching frequency (up to 2.5 MHz) and smaller inductors are prioritized over integration and protection. |
| LM2678SX-5.0/NOPB | 8–40 V input, 5 A output, external N-ch MOSFET, fixed 5 V output, no integrated thermal shutdown | Requires external thermal sensor and latch-off circuit for over-temperature; lower current rating limits scalability | Prefer for cost-sensitive designs where 5 A suffices and discrete protection can be added with known layout constraints. |
Compared with TPS54302DDAR and LM2678SX-5.0/NOPB, the TN8D41A-HB11-E delivers higher output current (8 A vs. 3/5 A), full protection integration (OCP/UVLO/OTP all self-recovering), and simplified layout due to internal P-ch MOSFET - reducing component count and improving reliability in thermally demanding environments.
Availability
TN8D41A-HB11-E is available at Aetrix Electronics and suitable for industrial automation power supplies, automotive body electronics, telecom remote radio units, and factory HMI panels requiring stable component supply across extended temperature and long product lifecycles.
Supply support for TN8D41A-HB11-E 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
SANYO Semiconductor Co., Ltd. was a Japanese semiconductor manufacturer specializing in power management, analog, and discrete devices before its acquisition by ON Semiconductor in 2013; legacy products maintain industrial qualification and long-term support.
The TN8D41A-HB11-E belongs to SANYO's ExPD (Excellent-Performance Power & RF Device) family, designed specifically for compact, high-current DC-DC conversion in industrial and transportation equipment where integration, thermal resilience, and autonomous fault recovery are critical.
FAQ
What is the maximum allowable input voltage for the TN8D41A-HB11-E?
The TN8D41A-HB11-E has an absolute maximum input voltage rating of 57 V at the VIN pin. Its recommended operating input range is 10–40 V. Exceeding 57 V-even momentarily-may cause permanent damage. The device includes under-voltage lockout (UVLO) that disables operation below ~7.2 V and re-enables above ~8.1 V to prevent unstable startup.
Does the TN8D41A-HB11-E require an external MOSFET?
No, the TN8D41A-HB11-E integrates a vertical P-channel power MOSFET with 80 mΩ RDS(on) and –60 V VDSS, eliminating the need for an external high-side switch. This integration simplifies PCB layout, reduces BOM count, and improves reliability in high-current buck applications up to 8 A.
How does the soft-start function work on the TN8D41A-HB11-E?
The TN8D41A-HB11-E implements soft-start via an external capacitor connected between the SS pin and GND. Charging this capacitor linearly ramps the internal reference, controlling output voltage rise time and limiting inrush current. The ramp duration is proportional to capacitance value, allowing design flexibility for different load requirements.
Can the TN8D41A-HB11-E be used in automotive applications?
The TN8D41A-HB11-E operates across –25 °C to +125 °C junction temperature and includes self-recovering over-temperature (165 °C trip), over-current, and under-voltage protection - making it suitable for non-safety-critical automotive body electronics such as BCMs and lighting controllers. However, it is not AEC-Q100 qualified; for safety-critical systems, consult SANYO/ON Semiconductor for validated alternatives.
What is the purpose of the SS pin on the TN8D41A-HB11-E besides soft-start?
In addition to soft-start timing control, the SS pin on the TN8D41A-HB11-E serves as a standby mode enable input. When the SS pin voltage is held ≤0.3 V (typical), the TN8D41A-HB11-E shuts down its switching operation and reduces quiescent current to 500 μA, enabling system-level power gating and low-power sleep states.
TN8D41A-HB11-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-5 Full Pack, Formed Leads
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 10V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 8A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -10°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220F5I5H-HB
TN8D41A-HB11-E FAQ
1.How can I place an order for TN8D41A-HB11-E through Aetrix?
Please submit a Request for Quotation (RFQ) for TN8D41A-HB11-E 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 TN8D41A-HB11-E reliable?
The price and inventory of TN8D41A-HB11-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TN8D41A-HB11-E is usually 5 days.
3.What payment methods are accepted for TN8D41A-HB11-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TN8D41A-HB11-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TN8D41A-HB11-E?
TN8D41A-HB11-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TN8D41A-HB11-E 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 TN8D41A-HB11-E?
For technical support, including TN8D41A-HB11-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TN8D41A-HB11-E requirements.
6.How does Aetrix verify that TN8D41A-HB11-E is sourced from the original manufacturer or authorized distributors?
All TN8D41A-HB11-E 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 TN8D41A-HB11-E meets industry standards.
7.What is the process for return or replacement of TN8D41A-HB11-E?
All TN8D41A-HB11-E units undergo pre-shipment inspection (PSI). If there is an issue with TN8D41A-HB11-E, 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 TN8D41A-HB11-E part is unused and in its original packaging.
Return procedure for TN8D41A-HB11-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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