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NXP Semiconductors MC35XS3500DHFK
- Part No.:
- MC35XS3500DHFK
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-PowerQFN
- Datasheet:
-
MC35XS3500DHFK.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:6 24PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:167
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Product details
Overview
MC35XS3500DHFK from NXP Semiconductors (formerly Freescale) is a penta-channel automotive high-side smart power switch IC designed for rear corner lighting control. It integrates five 35 mΩ RDS(ON) MOSFETs, 16-bit SPI interface (3.3 V/5.0 V compatible), per-channel PWM dimming, and comprehensive diagnostics-including over-current, open-load, over-temperature, and reverse-polarity protection. It operates across -40 °C to +125 °C and drives resistive and LED loads in stop, tail, license, flasher, and limp-home lighting functions.
For engineers reviewing the MC35XS3500DHFK datasheet, MC35XS3500DHFK pinout, MC35XS3500DHFK application, or MC35XS3500DHFK equivalent, this page delivers verified technical context, exact pin roles, real-world lighting use cases, and validated alternative parts-enabling rapid selection for automotive body electronics design, ECU integration, and functional safety-compliant lighting systems.
Technical Context
The MC35XS3500DHFK implements a fault-tolerant, multiphase-controlled high-side driver architecture with integrated charge pump, analog current sense mux (CSNS), and programmable edge shaping to suppress EMI during load switching. Its SPI register map enables independent configuration of each output's PWM duty cycle, diagnostic thresholds, and fail-safe behavior-including autorestart on over-current and thermal prewarning at 125 °C.
It features dual-level over-current detection (IOCHI1 up to 43.5 A, IOCHI2 up to 18.5 A), LED-specific low-duty-cycle support (down to 4.0 mA open-load threshold), and external FET control via FETIN/FETOUT pins. The device supports daisy-chained SPI topology and reports board temperature via CSNS analog feedback with ±5.0 °C calibrated accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RDS(ON) (per channel, 2.8 A, 25 °C) | 35 mΩ - Enables <1.0 W conduction loss per channel at 2.8 A, critical for thermally constrained automotive PCB layouts. |
| Operating voltage range (VBAT) | 7.0–20 V (full performance); up to 40 V load dump survival - Supports 12 V automotive battery systems with robust transient immunity. |
| SPI interface voltage | 3.3 V or 5.0 V logic - Direct interfacing with common microcontrollers without level-shifting in body control modules. |
| Current sense precision (ICS FSR = 6.0 A) | ±14% full-scale error (0.75 FSR), ±6.0% with single-point calibration - Enables accurate closed-loop LED current regulation and fault reporting. |
| Thermal shutdown threshold | 155–195 °C junction - Protects against sustained overload while allowing safe operation up to 150 °C junction in normal mode. |
| Output slew rate control | 0.10–0.80 V/µs (programmable SR bit) - Reduces EMI emissions by controlling dv/dt during turn-on/off, meeting CISPR 25 Class 5 requirements. |
| Package thermal resistance (RθJC) | 1.0 °C/W - Enables >5 W continuous power dissipation with minimal heatsinking in 12 × 12 mm PQFN package. |
Pinout & Package
MC35XS3500DHFK is housed in a 24-pin, 12 × 12 mm power-enhanced PQFN package with exposed thermal pad (bottom view). The package supports high-power dissipation and automotive reflow profiles (JEDEC J-STD-020C, MSL 3).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| OUT1–OUT5 | Protected high-side power outputs | Five independent 35 mΩ switches driving tail, license, stop, flasher, and limp-home lamps; each includes short-circuit and open-load detection. |
| CSNS | Analog current/temperature multiplexed output | Single pin outputs proportional voltage for OUT1–OUT5 current, FETIN current, or GND flag temperature-selected via SPI register. |
| FETIN / FETOUT | External MOSFET sense/control interface | FETIN accepts analog current sense input from external smart FET; FETOUT drives gate of external high-side switch (OUT6 functionality). |
| IGN / RST / FLASHER / STOP / LIMP / CLOCK | Dedicated wake-up and functional inputs | Hardware-triggered inputs enabling fail-safe activation (e.g., LIMP activates all outputs on fault), ignition wake-up, and flasher synchronization. |
| CS / SCLK / SI / SO | 16-bit SPI interface signals | Full-duplex SPI with chip select, clock, data-in, and data-out-supports daisy-chain configuration for multi-device systems. |
| VBAT / VCC / GND (pins 14,17,23) | Power and ground rails | VBAT supplies main load path (7–20 V); VCC powers logic (3.0–5.5 V); three GND pins must be shorted on PCB for low-impedance return path. |
Key Features
| Feature | Design Value |
|---|---|
| Penta 35 mΩ high-side switches | Enables simultaneous control of five lighting functions with <1.0 W/channel conduction loss at rated current, reducing thermal management burden. |
| Multiphase PWM edge shaping | Programmable slew rate (0.10–0.80 V/µs) minimizes radiated EMI during switching-critical for passing automotive EMC tests (CISPR 25). |
| SPI-programmable current sense mux | Single CSNS pin monitors output current (6.0 A FSR), external FET current, or board temperature-reducing BOM count and routing complexity. |
| Dual-level over-current protection | IOCHI1 (up to 43.5 A) triggers fast shutdown; IOCHI2 (up to 18.5 A) enables controlled derating-supporting both short-circuit and overload conditions. |
| Fail-safe autorestart mode | After thermal or over-current shutdown, device automatically recovers after 75 ms (typical), maintaining lighting availability without MCU intervention. |
| Reverse polarity & load dump protection | Withstands -18 V reverse battery and 40 V/400 ms load dump transients-eliminating need for external TVS diodes in most 12 V vehicle architectures. |
Applications
| Rear Corner Lighting Control | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Integrated control of tail, stop, license plate, flasher, and backup lamps in modern vehicle rear clusters. IC Role / Device Role / Timing Role: High-side power switch managing five independent lighting loads with synchronized PWM dimming and real-time diagnostics. Use Value: Replaces discrete relays and drivers, reducing PCB area by >40%, enabling precise brightness control and eliminating mechanical wear. |
Use Scenario: Centralized lighting management within BCM for OEM platforms requiring ASIL-B compliance and diagnostic coverage. IC Role / Device Role / Timing Role: SPI-configurable smart switch providing ISO 26262-compliant fault reporting (open-load, over-temp, short-circuit) to host MCU. Use Value: Delivers >95% diagnostic coverage per channel with hardware-based response-reducing software validation effort and improving system reliability. |
| LED Brake Light Dimming | Smart Rear Fog Lamp Activation |
|
Use Scenario: Adaptive brake light intensity control based on vehicle speed and ambient light, using low-duty-cycle PWM for LEDs. IC Role / Device Role / Timing Role: High-accuracy current-regulated driver (±6.0% with calibration) supporting 4.0–20 mA LED open-load detection. Use Value: Ensures consistent LED luminance across temperature (-40 °C to +125 °C) and battery voltage (7–20 V), meeting UNECE R149 photometric requirements. |
Use Scenario: Conditional activation of rear fog lamps during low-visibility events, coordinated with hazard flashers and brake signals. IC Role / Device Role / Timing Role: Fail-safe switch activated via LIMP input, with hardware-level priority override when STOP or FLASHER signals are asserted. Use Value: Guarantees lamp illumination even during MCU failure or communication loss-meeting FMVSS 108 and ECE R6 requirements for redundancy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side smart switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33883 | Single-channel 35 mΩ high-side switch; no integrated current sense mux or temperature feedback; SPI interface limited to 8-bit. | Lacks multi-output coordination and CSNS-based diagnostics-requires external ADC and thermal sensor for equivalent functionality. | Select when only one lighting channel is needed and cost sensitivity outweighs integration benefits. |
| TPS4H160-Q1 | Quad-channel 160 mΩ high-side switch; higher RDS(ON); supports 60 V load dump but lacks LED-specific low-current sensing and multiphase edge shaping. | Higher conduction loss limits use to lower-current loads (<1.5 A); no built-in temperature feedback or FETIN/FETOUT extension capability. | Select for simpler, lower-cost quad-switch needs where EMI control and advanced diagnostics are secondary. |
Compared with MC33883 and TPS4H160-Q1, the MC35XS3500DHFK uniquely delivers five tightly synchronized, low-RDS(ON) channels with integrated current/temperature sensing and fail-safe hardware autonomy-making it optimal for compact, high-reliability rear lighting modules requiring minimal external components and maximum diagnostic coverage.
Availability
MC35XS3500DHFK is available at Aetrix Electronics and suitable for automotive rear lighting systems, body control modules, and industrial signaling applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified performance.
Supply support for MC35XS3500DHFK 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
NXP Semiconductors is a global leader in automotive semiconductors, delivering secure, reliable, and energy-efficient solutions for vehicle electrification, ADAS, and digital transformation.
The MC35XS3500DHFK belongs to NXP's Smart Power Switch family, engineered specifically for automotive lighting control with emphasis on functional safety (ISO 26262-ready), EMC robustness, and thermal resilience in under-hood and rear-module environments.
FAQ
What is the primary function of the MC35XS3500DHFK in automotive systems?
The MC35XS3500DHFK serves as a penta-channel high-side smart power switch for automotive rear lighting control. It directly drives tail, stop, license, flasher, and limp-home lamps with integrated protection, diagnostics, and PWM dimming-replacing discrete relays and drivers while enabling ASIL-B compliant system designs. Its five 35 mΩ MOSFETs, SPI interface, and CSNS current/temperature feedback make MC35XS3500DHFK ideal for compact, thermally efficient lighting modules.
How does the MC35XS3500DHFK handle over-temperature conditions?
The MC35XS3500DHFK features dual thermal monitoring: prewarning at 110–140 °C (TOTSWARN) and shutdown at 155–195 °C (TOTS). When prewarning triggers, the device alerts the host MCU via SPI status register; if temperature exceeds shutdown threshold, all outputs disable and autorestart initiates after 75 ms (typical). Board temperature is also reported via CSNS analog output with ±5.0 °C calibrated accuracy-enabling proactive thermal management in MC35XS3500DHFK-based systems.
Can the MC35XS3500DHFK drive both incandescent bulbs and LEDs?
Yes, the MC35XS3500DHFK supports both resistive (bulb) and LED loads. For LEDs, it provides dedicated low-duty-cycle capability, 4.0–20 mA open-load detection, and current-sense precision optimized for 1.6 A full-scale range (ICS FSR_LED). Its programmable slew rate and PWM linear range (5.5–96%) ensure flicker-free dimming and EMI control-verified in MC35XS3500DHFK applications across OEM rear lighting platforms.
What is the role of the CSNS pin on the MC35XS3500DHFK?
The CSNS pin on the MC35XS3500DHFK is a multiplexed analog output that reports either: (1) current through OUT1–OUT5 (6.0 A FSR), (2) current through FETIN (5.0 mA full scale), or (3) board temperature via GND flag voltage-all selected via SPI register. This eliminates need for separate current sensors or thermal ICs, simplifying BOM and layout. CSNS output precision is ±6.0% with single-point calibration at 25 °C-critical for closed-loop control in MC35XS3500DHFK lighting systems.
Does the MC35XS3500DHFK support daisy-chained SPI communication?
Yes, the MC35XS3500DHFK supports daisy-chained SPI communication via its SO (Master-In-Slave-Out) and SI (Master-Out-Slave-In) pins. In daisy-chain mode, multiple MC35XS3500DHFK devices share a single CS line and SCLK, with data cascading from SO of one device to SI of the next. This reduces MCU GPIO usage and simplifies wiring in multi-switch applications such as full-vehicle lighting controllers-confirmed in Freescale application note AN4702 for MC35XS3500DHFK.
MC35XS3500DHFK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 24-PowerQFN
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 6
- Ratio - Input:Output:
- 1:6
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- SPI
- Voltage - Load:
- 7V ~ 20V
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Current - Output (Max):
- -
- Rds On (Typ):
- 35mOhm (Max)
- Input Type:
- -
- Features:
- Watchdog Timer
- Fault Protection:
- Current Limiting (Fixed), Open Load Detect, Over Temperature, Over Voltage
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-PQFN (12x12)
MC35XS3500DHFK FAQ
1.How can I place an order for MC35XS3500DHFK through Aetrix?
Please submit a Request for Quotation (RFQ) for MC35XS3500DHFK 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 MC35XS3500DHFK reliable?
The price and inventory of MC35XS3500DHFK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC35XS3500DHFK is usually 5 days.
3.What payment methods are accepted for MC35XS3500DHFK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC35XS3500DHFK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC35XS3500DHFK?
MC35XS3500DHFK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC35XS3500DHFK 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 MC35XS3500DHFK?
For technical support, including MC35XS3500DHFK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC35XS3500DHFK requirements.
6.How does Aetrix verify that MC35XS3500DHFK is sourced from the original manufacturer or authorized distributors?
All MC35XS3500DHFK 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 MC35XS3500DHFK meets industry standards.
7.What is the process for return or replacement of MC35XS3500DHFK?
All MC35XS3500DHFK units undergo pre-shipment inspection (PSI). If there is an issue with MC35XS3500DHFK, 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 MC35XS3500DHFK part is unused and in its original packaging.
Return procedure for MC35XS3500DHFK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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