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Texas Instruments TPS25846QCWRHBRQ1
- Part No.:
- TPS25846QCWRHBRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS25846QCWRHBRQ1.pdf
- Description:
- USB BC1.2 5-V 3.5-A OUTPUT, 36-V
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
TPS25846QCWRHBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive USB Type-A BC1.2 synchronous buck converter with integrated USB data switches, cable droop compensation up to 1.5 V, and ±1% 5.1-V output accuracy at 3.5-A load. It operates from 4.5 V to 36 V input, supports 300 kHz–2.2 MHz adjustable switching frequency, and delivers robust protection including VBUS/DP_IN/DM_IN short-to-battery and IEC 61000-4-2 ±8-kV contact ESD. It targets USB charging ports in automotive infotainment systems.
For engineers reviewing the TPS25846QCWRHBRQ1 datasheet, TPS25846QCWRHBRQ1 pinout, TPS25846QCWRHBRQ1 application, or TPS25846QCWRHBRQ1 equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal and ESD specs, real-world cable compensation behavior, and two documented alternative parts for USB power delivery design review.
Technical Context
The TPS25846QCWRHBRQ1 integrates a current-mode controlled synchronous buck regulator with internal compensation and dual high-bandwidth analog switches (DP/DM) supporting SDP/CDP/Client modes. Its cable compensation adjusts output voltage linearly with load current using external resistors on IMON and ILIMIT pins, maintaining stable VBUS at the connected device despite automotive cabling resistance.
Protection architecture includes cycle-by-cycle current limiting, hiccup-mode short-circuit response, VBUS overvoltage lockout (7.0 V threshold), DP_IN/DM_IN overvoltage clamping (3.9 V), and dedicated fault reporting via open-drain FAULT and BUCK_ST pins. The LS_GD pin drives an external NMOS for optional current-limiting flexibility during overcurrent events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 36 V - supports wide automotive battery range including cold-crank and load-dump transients. |
| Output Voltage | 5.1 V ±1% - precision regulation ensures USB BC1.2 compliance and optimal portable-device charging. |
| Max Output Current | 3.5 A - continuous regulated output enables high-power USB-A charging without external current boosting. |
| Cable Compensation Range | Up to 1.5 V - dynamically offsets voltage drop across long automotive cables to maintain constant VBUS at device end. |
| Switching Frequency | 300 kHz to 2.2 MHz - adjustable via RT resistor or external SYNC clock; avoids AM band above 2.1 MHz. |
| USB Data Switch RDS(on) | 3.4 Ω to 7.7 Ω - low on-resistance and <0.15 Ω mismatch preserves signal integrity for USB 2.0 full-speed operation. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C TA) - qualified for under-hood and infotainment module deployment. |
| ESD Rating | ±8-kV contact / ±15-kV air (IEC 61000-4-2 on DP_IN/DM_IN) - meets automotive EMC requirements without external TVS diodes. |
Pinout & Package
TPS25846QCWRHBRQ1 uses a 32-pin VQFN package (RHB0032AA) with 5.00 mm × 5.00 mm body size and wettable flanks for automated optical inspection. Thermal pad is electrically connected to PGND and requires PCB land pattern per TI SLOA197.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (1,2,3) | Power Input | Primary buck regulator input; accepts 4.5–36 V; requires local ceramic bypass to PGND. |
| CSN/OUT (13) | Current Sense Negative / Buck Output | Regulated 5.1-V output node and negative current sense input; connects to output capacitor and sense resistor. |
| CSP (14) | Current Sense Positive | Positive current sense input; forms differential pair with CSN/OUT for accurate current limit and cable compensation. |
| ILIMIT (12) | Current Limit Programming | External resistor sets average current limit threshold (e.g., 13 kΩ = 3.5 A); enables programmable OCP without layout change. |
| IMON (11) | Cable Compensation Tuning | Resistor sets max compensation voltage (e.g., 13 kΩ = 1.0 V); directly scales VBUS boost vs load current. |
| DP_IN/DM_IN (17,18) | USB Connector Data Inputs | Accepts DP/DM signals from USB-A receptacle; includes 3.9-V overvoltage clamp and IEC 61000-4-2 ESD protection. |
| DP_OUT/DM_OUT (7,8) | USB Host Controller Data Outputs | Drives DP/DM to host controller; 800-MHz bandwidth and <7-pF off-capacitance preserve USB 2.0 eye diagram. |
| LS_GD (10) | External NFET Gate Driver | 12-V capable open-drain driver for external NMOS; enables independent current limiting during USB port faults. |
| FAULT (24) | Fault Indicator | Active-low open-drain flag asserted on overcurrent, overtemperature, overvoltage, or short-circuit events. |
| BUCK_ST (23) | Buck Startup Status | Active-low open-drain signal indicating buck regulator ready; synchronizes DP/DM switch enable timing. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck with Internal Compensation | Eliminates need for external loop compensation components; reduces BOM count and layout complexity. |
| User-Programmable Cable Droop Compensation | Linear VBUS boost up to 1.5 V using two external resistors (ILIMIT, IMON), ensuring stable charging under heavy loads. |
| Integrated High-Bandwidth USB Data Switches | 800-MHz bandwidth and <0.15-Ω DP/DM RDS(on) mismatch support full-speed USB 2.0 signaling without signal degradation. |
| VBUS/DP_IN/DM_IN Short-to-Battery Protection | Withstands up to 18 V on VBUS, DP_IN, and DM_IN pins - enables direct connection to automotive battery rails without level shifters. |
| Two-Threshold Current Limit Architecture | Supports either internal average-current limiting or external NMOS-based limiting, allowing continued 5-V supply to other loads during USB port fault. |
| Spread-Spectrum Dithering & FPWM Mode | Reduces EMI peak emissions; maintains fixed-frequency PWM operation even at light loads for predictable noise spectrum. |
Applications
| Automotive Infotainment Head Units | USB Media Hubs |
|---|---|
Use Scenario: Integrated USB-A charging port in center-stack head unit with 12-V battery input and long harness runs to rear-seat connectors. IC Role / Device Role / Timing Role: Primary USB power delivery IC providing regulated 5.1-V/3.5-A output with real-time cable compensation and BC1.2 signature generation. Use Value: Maintains constant VBUS at connected tablet or phone despite >1.2-V drop across 3-meter automotive wiring, enabling full-rate charging without negotiation failure. |
Use Scenario: Multi-port USB hub in vehicle console supporting simultaneous charging of smartphone, headphones, and dashcam. IC Role / Device Role / Timing Role: Single-chip USB-A power manager with integrated DP/DM switches, eliminating need for discrete analog switches and current-sense amplifiers. Use Value: Reduces component count by 7 parts versus discrete solution while delivering 3.5-A total current with coordinated fault reporting across all ports. |
| Automotive USB Charger Ports | OBD-II Diagnostic Adapters |
Use Scenario: Cigarette-lighter–to-USB-A adapter with AEC-Q100 qualification for under-dash mounting near engine bay. IC Role / Device Role / Timing Role: Automotive-grade buck converter + USB physical layer interface handling input transients, ESD, and cable loss compensation. Use Value: Survives 40-V load-dump pulses and –40°C to +125°C ambient; ±8-kV contact ESD on DP/DM eliminates need for external TVS diodes. |
Use Scenario: OBD-II to USB-C diagnostic dongle requiring reliable USB communication and power delivery from vehicle CAN bus power rail. IC Role / Device Role / Timing Role: USB-A downstream port controller with Client Mode support for firmware updates via host PC. Use Value: Enables in-field firmware upgrades through standard USB enumeration without requiring separate programming interface or bootloader mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB power delivery applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS25840-Q1 | Requires 5-V I/O logic; needs external pull-up on DP/DM for startup; supports RPU at LS_GD in average current limit mode. | Lacks integrated cable compensation; requires external circuitry for VBUS stabilization under load. | Choose when legacy system uses 5-V logic rails and cable compensation is handled externally or not required. |
| TPS25842-Q1 | Also 5-V I/O; supports SDP/CDP but no DP/DM short-to-battery protection; no Client Mode capability. | Not rated for DP_IN/DM_IN short-to-VBAT; limited to lower-voltage USB implementations without battery-rail tolerance. | Select only for non-battery-connected USB interfaces where 18-V fault tolerance is unnecessary and Client Mode updates are not needed. |
Compared with TPS25846QCWRHBRQ1, the TPS25840-Q1 and TPS25842-Q1 lack integrated cable compensation and DP/DM short-to-battery protection, requiring additional components for automotive-grade robustness and reducing design simplicity for high-current USB-A ports.
Availability
TPS25846QCWRHBRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, USB media hubs, and USB charger ports requiring stable component supply, AEC-Q100 compliance, and production-ready USB power delivery functionality.
Supply support for TPS25846QCWRHBRQ1 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with deep expertise in automotive-grade power management and USB interface solutions.
The TPS25846-Q1 product line delivers integrated USB Type-A BC1.2 charging with synchronous buck conversion and data-line pass-through, designed specifically for automotive infotainment and accessory power systems demanding high reliability and compact footprint.
FAQ
What is the maximum input voltage rating for the TPS25846QCWRHBRQ1?
The TPS25846QCWRHBRQ1 has an absolute maximum input voltage rating of 40 V on the IN pin relative to PGND, with recommended operating range from 4.5 V to 36 V. This allows safe operation during automotive load-dump transients up to 40 V while maintaining regulation across normal battery conditions from cold-crank (≈6 V) to alternator surge (≈36 V). The device remains functional and protected within this envelope without external clamping.
How does cable droop compensation work in the TPS25846QCWRHBRQ1?
The TPS25846QCWRHBRQ1 implements cable droop compensation by increasing its regulated output voltage linearly with load current using two external resistors: ILIMIT sets the current limit threshold, and IMON scales the compensation voltage (up to 1.5 V). This dynamic boost counteracts voltage drop across automotive cabling, ensuring VBUS measured at the connected device stays near 5.1 V regardless of current draw - critical for BC1.2-compliant charging under heavy loads.
Does the TPS25846QCWRHBRQ1 support USB BC1.2 CDP mode detection?
Yes, the TPS25846QCWRHBRQ1 fully supports USB Battery Charging Specification 1.2 CDP (Charging Downstream Port) mode detection. It applies precise voltage signatures on DP_IN and DM_IN - including VDM_SRC activation at 0.6 V and windowed thresholds (0.38 V lower, 0.84 V upper) - to identify legacy devices and negotiate optimal charging current without host intervention.
What protection features are integrated into the TPS25846QCWRHBRQ1?
The TPS25846QCWRHBRQ1 integrates multiple hardware-level protections: VBUS short-to-VBAT, DP_IN/DM_IN short-to-VBAT (with 18-V tolerance), DP_IN/DM_IN short-to-VBUS, cycle-by-cycle current limiting, hiccup-mode short-circuit response, thermal shutdown (160°C trip), and IEC 61000-4-2 ±8-kV contact ESD on data lines. Fault conditions are reported via dedicated open-drain FAULT and BUCK_ST pins for system-level monitoring.
Can the TPS25846QCWRHBRQ1 operate with an external clock source?
Yes, the TPS25846QCWRHBRQ1 supports external clock synchronization via the RT/SYNC pin. When driven with a clean 3.3-V square wave between 300 kHz and 2.3 MHz, the internal PLL locks within 100 µs and overrides the RT resistor setting. This enables EMI reduction through frequency dithering or synchronization to system clocks - essential for noise-sensitive automotive audio and display subsystems.
TPS25846QCWRHBRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- USB Dedicated Charging Port (DCP), Power Switch
- Current - Supply:
- 700µA
- Voltage - Supply:
- 4.5V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 32-VQFN (5x5)
TPS25846QCWRHBRQ1 FAQ
1.How can I place an order for TPS25846QCWRHBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS25846QCWRHBRQ1 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 TPS25846QCWRHBRQ1 reliable?
The price and inventory of TPS25846QCWRHBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS25846QCWRHBRQ1 is usually 5 days.
3.What payment methods are accepted for TPS25846QCWRHBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS25846QCWRHBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS25846QCWRHBRQ1?
TPS25846QCWRHBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS25846QCWRHBRQ1 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 TPS25846QCWRHBRQ1?
For technical support, including TPS25846QCWRHBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS25846QCWRHBRQ1 requirements.
6.How does Aetrix verify that TPS25846QCWRHBRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS25846QCWRHBRQ1 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 TPS25846QCWRHBRQ1 meets industry standards.
7.What is the process for return or replacement of TPS25846QCWRHBRQ1?
All TPS25846QCWRHBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS25846QCWRHBRQ1, 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 TPS25846QCWRHBRQ1 part is unused and in its original packaging.
Return procedure for TPS25846QCWRHBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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