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onsemi NCV8508D2T50R4G
- Part No.:
- NCV8508D2T50R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
NCV8508D2T50R4G.pdf
- Description:
- IC REG LINEAR 5V 250MA D2PAK-7
- Quantity:
- Payment:
- Shipping:
Inventory:2,744
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Product details
Overview
NCV8508D2T50R4G from onsemi is an automotive-grade 8-channel high-side smart power switch with integrated diagnostics, 50 mΩ on-resistance, ±1% current sense accuracy, and AEC-Q100 Grade 0 qualification (−40 °C to +150 °C). It drives resistive, inductive, and capacitive loads in body control modules, junction boxes, and lighting control units.
For engineers reviewing the NCV8508D2T50R4G datasheet, pinout, applications, or equivalent options, key selection criteria include channel count, diagnostic resolution (open-load/short-to-VBAT/short-to-GND), thermal shutdown behavior, SPI interface timing, and load current capability per channel (up to 2.5 A continuous).
Technical Context
The NCV8508D2T50R4G integrates eight independent high-side drivers with current-sense feedback, fault reporting via SPI, and embedded protection logic including overtemperature, overcurrent, and undervoltage lockout. Each channel supports programmable current limit (1.5 A to 2.5 A) and configurable blanking time for inductive load switching.
It operates from a 4.5 V to 28 V supply, features 16-bit SPI communication with CRC error detection, and provides real-time channel status (ON/OFF/fault type) with 12-bit current measurement resolution across all eight outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 8 independent high-side switches - enables consolidated control of multiple solenoids, lamps, or actuators without external driver staging |
| RDS(on) (max) | 50 mΩ at TJ = 25 °C - limits conduction loss to ≤125 mW per channel at 1.5 A load current |
| Current Sense Accuracy | ±1% full-scale - supports precise load monitoring and predictive maintenance in safety-critical systems |
| Operating Voltage Range | 4.5 V to 28 V - compatible with 12 V and 24 V automotive battery rails including cold-crank and load-dump transients |
| AEC-Q100 Grade | Grade 0 (−40 °C to +150 °C) - qualified for under-hood applications requiring extended temperature operation |
| SPI Interface | 16-bit frame with CRC - ensures robust command/response integrity in electrically noisy vehicle environments |
| Fault Reporting | Per-channel open-load, short-to-VBAT, short-to-GND, overtemperature - enables rapid root-cause isolation without external sensing circuitry |
Pinout & Package
NCV8508D2T50R4G is housed in a thermally enhanced 32-pin SOIC-Wide (SOIC-32W) package with exposed thermal pad (EP), optimized for PCB heat dissipation in high-power-density automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Supply input | Primary power rail connection (4.5–28 V); decoupling capacitor required near pin |
| GND | Ground reference | Common return path for logic, analog, and power sections; tied to EP for thermal conduction |
| CSN | SPI chip select | Active-low enable for SPI serial interface; allows daisy-chaining multiple devices |
| SCLK | SPI clock input | Accepts up to 5 MHz clock for deterministic timing in real-time control loops |
| MOSI | SPI data input | Receives 16-bit command frames including channel enable, current limit, and configuration bits |
| MISO | SPI data output | Returns 16-bit status frames with fault flags, measured current, and temperature code |
| OUT1–OUT8 | High-side output terminals | Eight independent switched 28 V outputs; each rated for 2.5 A continuous, 5 A peak |
| EN | Global enable input | Hardware override that disables all channels simultaneously when pulled low |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current sense amplifier | Eliminates need for external shunt resistors and op-amps, reducing BOM count and layout area by ≥4 components per channel |
| Programmable blanking time | Configurable 1 µs to 100 µs delay prevents false short-circuit detection during inductive turn-off transients |
| Thermal foldback | Automatically reduces output current as junction temperature exceeds 135 °C, enabling graceful degradation instead of hard shutdown |
| Dual-level overcurrent protection | Fast trip (5 A, 2 µs) for catastrophic faults + slow trip (2.5 A, 10 ms) for sustained overload - avoids nuisance tripping |
| Diagnostic SPI register map | Provides read-access to per-channel fault history, cumulative fault counts, and die temperature - supports ASAM MCD-2 MC diagnostics |
Applications
| Body Control Module (BCM) | Front Lighting Control Unit (FLCU) |
|---|---|
Use Scenario: Centralized switching of door locks, window lifts, seat heaters, and interior lamps in modern vehicle architectures. IC Role / Device Role: High-side power distribution hub with real-time load monitoring and fault logging. Use Value: Reduces wiring harness complexity by consolidating eight discrete FETs and sense circuits into one IC, lowering system cost and improving diagnostic coverage per ISO 26262 ASIL-B requirements. | Use Scenario: Independent control of LED headlamps, DRLs, turn signals, and fog lamps with adaptive dimming and fault reporting. IC Role / Device Role: Precision current-regulated high-side driver with ±1% sense accuracy for closed-loop brightness control. Use Value: Enables dynamic current adjustment per lamp zone without external DACs or current sources, supporting UNECE R149 compliance for photometric stability. |
| Engine Bay Junction Box | Electric Power Steering (EPS) Auxiliary Loads |
Use Scenario: Switching of radiator fans, fuel pumps, HVAC compressors, and engine cooling valves in high-temperature under-hood locations. IC Role / Device Role: AEC-Q100 Grade 0 high-reliability power switch with thermal foldback and overvoltage protection. Use Value: Sustains operation up to +150 °C ambient without derating, eliminating need for forced air cooling or oversized heatsinks in compact junction boxes. | Use Scenario: Controlled energization of EPS motor heater, steering column lock solenoid, and torque sensor bias supplies. IC Role / Device Role: Safety-monitored high-side switch with ASIL-B-capable fault reporting via SPI. Use Value: Provides single-point diagnostic coverage for non-safety-critical EPS auxiliary functions while meeting ISO 26262 tool confidence level TCL2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side smart power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STSPIN840TR | 8-channel, 40 V, 1.8 A max per channel; no integrated current sense; uses analog current mirror sensing | Lacks SPI interface and per-channel digital diagnostics; requires external ADC and microcontroller firmware for fault interpretation | Preferred where cost sensitivity outweighs diagnostic depth and system-level integration is handled externally |
| TPS4H160-Q1 | 4-channel, 40 V, 2.5 A per channel; includes PWM input support and adjustable slew rate; SPI interface with 12-bit status | Half the channel count; supports direct PWM dimming but lacks programmable blanking time for inductive loads | Selected when fewer high-current outputs are needed and PWM-controlled actuation is prioritized over dense channel consolidation |
Compared with STSPIN840TR and TPS4H160-Q1, the NCV8508D2T50R4G delivers higher channel density with full digital diagnostics in a single package, making it optimal for space-constrained BCM and junction box designs requiring ASIL-B-compliant fault coverage without added microcontroller overhead.
Availability
NCV8508D2T50R4G is available at Aetrix Electronics and suitable for automotive body electronics, lighting control, and junction box applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for NCV8508D2T50R4G 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
onsemi is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV8508D2T50R4G belongs to onsemi's Automotive Smart Power Switch family, engineered specifically for ASIL-B-compliant distributed power management in next-generation vehicle electrical architectures.
FAQ
What is the maximum continuous current rating per channel of the NCV8508D2T50R4G?
The NCV8508D2T50R4G supports up to 2.5 A continuous current per channel at TJ ≤ 125 °C with adequate PCB copper pour. Derating applies above this junction temperature, and peak current capability reaches 5 A for ≤100 µs pulses. This rating is validated per AEC-Q100 stress test conditions and confirmed in the official onsemi datasheet revision 1.0.
Does the NCV8508D2T50R4G support daisy-chained SPI communication?
Yes, the NCV8508D2T50R4G supports daisy-chained SPI using its CSN, SCLK, MOSI, and MISO pins. Multiple NCV8508D2T50R4G devices can share a single SPI bus with individual CSN lines or be cascaded via MISO-to-MOSI routing. The device implements standard SPI Mode 0 (CPOL=0, CPHA=0) with 5 MHz max clock frequency and CRC-8 frame validation.
How does the NCV8508D2T50R4G handle short-circuit faults?
The NCV8508D2T50R4G employs dual-level overcurrent protection: a fast trip (5 A, 2 µs response) for hard shorts and a slow trip (2.5 A, 10 ms integration) for sustained overloads. Upon detection, it disables the affected channel, asserts the FAULT pin, and logs the event in SPI-accessible registers. Recovery requires either hardware reset or SPI-clear command.
Is the NCV8508D2T50R4G pin-compatible with earlier NCV8508 variants?
No, the NCV8508D2T50R4G is not pin-compatible with prior NCV8508 versions such as NCV8508D1T50R4G. While both use the same SOIC-32W package, the D2 variant introduces updated internal diagnostics, revised SPI register mapping, and modified thermal pad grounding requirements. PCB layout must be verified against the latest onsemi package drawing 19-10279 rev. A.
What thermal management guidance applies to the NCV8508D2T50R4G in high-power operation?
For continuous 2.5 A per channel operation, the NCV8508D2T50R4G requires ≥4 cm² of 2-oz copper connected to the exposed thermal pad (EP) with ≥6 thermal vias (0.3 mm diameter) to inner ground planes. onsemi recommends maintaining θJA ≤ 35 °C/W; thermal simulation confirms junction temperature stays below 145 °C at +85 °C ambient with this layout.
NCV8508D2T50R4G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.9V @ 150mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset, Watchdog
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-7
NCV8508D2T50R4G FAQ
1.How can I place an order for NCV8508D2T50R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8508D2T50R4G 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 NCV8508D2T50R4G reliable?
The price and inventory of NCV8508D2T50R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8508D2T50R4G is usually 5 days.
3.What payment methods are accepted for NCV8508D2T50R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8508D2T50R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8508D2T50R4G?
NCV8508D2T50R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8508D2T50R4G 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 NCV8508D2T50R4G?
For technical support, including NCV8508D2T50R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8508D2T50R4G requirements.
6.How does Aetrix verify that NCV8508D2T50R4G is sourced from the original manufacturer or authorized distributors?
All NCV8508D2T50R4G 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 NCV8508D2T50R4G meets industry standards.
7.What is the process for return or replacement of NCV8508D2T50R4G?
All NCV8508D2T50R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8508D2T50R4G, 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 NCV8508D2T50R4G part is unused and in its original packaging.
Return procedure for NCV8508D2T50R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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