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Texas Instruments TPS92520QDADRQ1
- Part No.:
- TPS92520QDADRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Datasheet:
-
TPS92520QDADRQ1.pdf
- Description:
- IC LED DRVR RGLTR PWM 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,425
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Product details
Overview
TPS92520QDADRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified dual synchronous buck LED driver supporting 4.5 V to 65 V input, delivering up to 1.6 A per channel with ±4% current accuracy, adaptive on-time average current control, and SPI-configurable 100 kHz–2.2 MHz switching frequency - designed for independent dimming of two LED strings in adaptive headlamp systems.
For engineers reviewing the TPS92520QDADRQ1 datasheet, TPS92520QDADRQ1 pinout, TPS92520QDADRQ1 application, or TPS92520QDADRQ1 equivalent, key selection criteria include dual-channel current regulation accuracy, SPI-based fault reporting (LED open/short, thermal warning/shutdown), external shunt dimming compatibility, and HTSSOP-32 thermal performance under automotive ambient conditions (–40°C to +125°C).
Technical Context
The TPS92520QDADRQ1 implements adaptive on-time average current mode control with integrated high-side and low-side MOSFETs per channel, enabling near-constant switching frequency across wide VIN and VOUT ranges. Its rail-to-rail transconductance error amplifiers (COMP1/COMP2) interface directly with current-sense resistors (CSPx/CSNx) for closed-loop LED current regulation.
SPI programmability governs analog reference, PWM duty cycle, switching frequency, and fault monitoring - including cycle-by-cycle overcurrent protection, bootstrap undervoltage detection, and thermal shutdown at 175°C. An on-board 10-bit ADC monitors VIN1/VIN2, V5D, VCSN1/VCSN2, LHI, and die temperature for system health diagnostics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 65 V - supports direct connection to automotive battery (12 V/24 V/48 V systems) with transient tolerance up to 65 V. |
| Max Output Current | 1.6 A per channel - enables driving high-brightness LED strings (e.g., 12–16 LEDs in series) with ±4% accuracy over temperature and line/load variation. |
| Switching Frequency | 100 kHz to 2.2 MHz - programmable via SPI to optimize EMI, efficiency, and inductor size; minimum on-time 105 ns ensures stable operation at high VIN/VOUT ratios. |
| Dimming Resolution | 10-bit analog (IADJ) and 10-bit internal PWM - provides >16:1 linear analog dimming range and precise digital brightness control without external timing components. |
| Thermal Protection | Thermal shutdown at 175°C with 16°C hysteresis - prevents latch-up during sustained overload; junction-to-board thermal resistance RθJB = 8.3°C/W (DAP package) enables high-power density layout. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C ambient) - qualified for front-end automotive lighting applications requiring full operational reliability in engine bay environments. |
| Fault Reporting | SPI-accessible flags for LED open, LED short, bootstrap UVLO, thermal warning, and thermal shutdown - enables real-time diagnostics without additional monitoring circuitry. |
Pinout & Package
TPS92520QDADRQ1 is housed in a thermally enhanced 32-pin HTSSOP package (8.1 mm × 11 mm) with top- and bottom-exposed thermal pad for efficient heat dissipation in automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST1, BST2 | Bootstrap supply for high-side gate drive | Requires ceramic capacitor to SWx; internal diode connects to V5D - enables high-side FET operation without external charge pump. |
| SW1, SW2 | Switch node outputs | Direct connection to power inductors; rated for 65 V max SW-to-PGND - supports high-VIN buck topology with minimal voltage stress. |
| CSP1/CSN1, CSP2/CSN2 | Differential current sense inputs | Connect across RCS sense resistor; rail-to-rail input range supports accurate sensing down to 20 mV ripple - critical for ±4% current regulation. |
| MOSI/MISO/SCK/SSN | SPI serial interface | 4-wire interface with open-drain MISO; supports daisy-chaining multiple devices and real-time register readback of fault status and ADC values. |
| UDIM1, UDIM2 | External PWM dimming / UVLO input | Accepts external PWM signal or resistor divider for input undervoltage lockout; threshold 1.22 V rising - enables fail-safe power sequencing. |
| LHI | Limp-home current set point | Analog voltage input (148–200 mV enables both channels); allows hardware-based fallback current setting without SPI communication. |
| FLT | Open-drain fault indicator | Active-low output pulled to V5D via external resistor - signals combined fault condition for system-level watchdog or microcontroller interrupt. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent buck regulators | Two fully isolated 1.6-A channels with separate COMP/CSP/CSN pins - eliminates cross-talk between LED strings in matrix headlamps. |
| Adaptive on-time current control | Maintains near-constant switching frequency across 4.5–65 V input while preserving fast transient response - simplifies EMI filter design vs fixed-frequency controllers. |
| SPI-configurable diagnostics | Real-time access to 10-bit ADC readings (VIN1/VIN2, temperature, LHI) and fault registers (LED open/short, thermal, UVLO) - reduces BOM cost by eliminating external sensors. |
| Shunt FET dimming support | Optimized for external shunt dimming and LED Matrix Manager integration - enables dynamic beam shaping without modifying LED string current. |
| Limp-home and stand-alone modes | LHI pin sets LED current without SPI; LHCFG1 register configures behavior - ensures partial functionality during communication failure in safety-critical lighting. |
Applications
| Automotive Adaptive Headlamps | Dynamic Beam LED Matrix |
|---|---|
|
Use Scenario: High-resolution headlight systems adjusting beam pattern in real time based on vehicle speed, steering angle, and traffic conditions. IC Role / Device Role / Timing Role: Dual-channel LED current controller providing independent, synchronized current regulation for left/right LED arrays with SPI-triggered dimming updates. Use Value: Enables pixel-level beam control using external shunt FETs while maintaining ±4% current matching between channels for consistent luminance across the matrix. |
Use Scenario: Modular LED headlamp modules integrating multiple TPS92520QDADRQ1 devices to drive segmented LED zones (e.g., cornering, high-beam assist, glare-free zones). IC Role / Device Role / Timing Role: Primary LED driver IC with daisy-chainable SPI interface - allows centralized microcontroller to coordinate timing and dimming across dozens of channels. Use Value: Reduces system latency through hardware-supported PWM dimming and fault reporting, meeting ASIL-B functional safety requirements for adaptive lighting. |
| Automotive Front Fog Lamps | Commercial Vehicle Daytime Running Lights (DRL) |
|
Use Scenario: Robust fog lamps operating in harsh environments with wide input voltage swings (cold crank, load dump) and high ambient temperatures. IC Role / Device Role / Timing Role: Dual-output buck driver powering two parallel LED strings with independent thermal protection and input UVLO. Use Value: AEC-Q100 Grade 1 qualification and 65 V absolute max rating ensure reliable operation during 24 V commercial vehicle load dump events (ISO 7637-2 Pulse 5a). |
Use Scenario: High-reliability DRL systems requiring continuous operation over 15+ years with zero maintenance and guaranteed lumen output. IC Role / Device Role / Timing Role: Constant-current LED driver with 10-bit analog dimming precision and sleep-mode current as low as 16 nA - minimizes standby power loss. Use Value: ±4% current accuracy over –40°C to +125°C ambient ensures consistent DRL intensity across vehicle lifetime and environmental extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel automotive LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3429QMH/NOPB | Single-channel controller with external MOSFETs; no integrated high/low-side FETs; no SPI interface; analog-only dimming. | Requires discrete FETs and external fault monitoring; lacks diagnostic ADC and multi-channel synchronization. | Choose when cost-sensitive designs prioritize flexibility over integration and diagnostics. |
| TPS92692QPWPRQ1 | Single-channel, higher-voltage (75 V) LED driver with integrated FETs; supports 100 Hz–2.2 MHz frequency; includes I²C interface instead of SPI. | Requires two units for dual-string operation; I²C limits daisy-chaining capability vs SPI; no LHI limp-home pin. | Choose when higher input voltage margin (>65 V) or I²C ecosystem compatibility is required over dual-channel integration. |
Compared with LM3429QMH/NOPB and TPS92692QPWPRQ1, the TPS92520QDADRQ1 uniquely integrates dual synchronous buck stages with SPI diagnostics, limp-home mode, and shunt-dimming optimization - reducing component count and enabling ASIL-B-compliant adaptive headlamp architectures in a single 32-pin HTSSOP package.
Availability
TPS92520QDADRQ1 is available at Aetrix Electronics and suitable for automotive headlamp modules, adaptive LED matrix systems, and commercial vehicle DRL applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for TPS92520QDADRQ1 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 automotive ICs, with decades of expertise in power management and LED driver innovation.
The TPS92520-Q1 product line delivers dual-channel, high-voltage synchronous buck LED drivers engineered specifically for functional safety-compliant adaptive automotive lighting - emphasizing precision current regulation, robust diagnostics, and thermal resilience in engine compartment environments.
FAQ
What is the maximum LED string voltage supported by the TPS92520QDADRQ1?
The TPS92520QDADRQ1 does not regulate LED string voltage directly; it regulates current. Its 65 V absolute maximum SW-to-PGND rating and 4.5–65 V input range allow driving LED strings with forward voltages up to ~60 V (e.g., 16× white LEDs at 3.75 V each), provided sufficient headroom remains for the buck converter's dropout and ripple requirements.
Does the TPS92520QDADRQ1 support hardware-based dimming without SPI communication?
Yes. The TPS92520QDADRQ1 supports limp-home (LH) and stand-alone modes via the LHI pin. Applying a voltage between 148 mV and 200 mV to LHI sets LED current without SPI - enabling fail-operational behavior during microcontroller faults or boot-up sequences.
How does the adaptive on-time control in the TPS92520QDADRQ1 improve system performance?
The adaptive on-time control in the TPS92520QDADRQ1 dynamically adjusts switch on-time based on input and output voltage to maintain near-constant frequency across wide operating ranges. This improves EMI predictability, simplifies filter design, and preserves fast transient response - unlike fixed-frequency controllers that sacrifice regulation speed or stability at extreme VIN/VOUT ratios.
What thermal metrics apply to the TPS92520QDADRQ1 in its HTSSOP package?
The TPS92520QDADRQ1 in the DAP variant (HTSSOP-32 with bottom-exposed pad) has RθJB = 8.3°C/W and RθJC(bot) = 1.8°C/W. With proper PCB copper area under the thermal pad, it sustains 1.6 A per channel continuously at +125°C ambient - validated per JESD51-7 with 4-layer board and 2 W power dissipation.
Can the TPS92520QDADRQ1 be used in non-automotive applications?
Yes - while AEC-Q100 qualified and optimized for automotive, the TPS92520QDADRQ1's 4.5–65 V input, ±4% current accuracy, and robust protection features make it suitable for industrial LED lighting, agricultural equipment lighting, and off-road vehicle systems where extended temperature and voltage tolerance are required.
TPS92520QDADRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 63V
- Voltage - Output:
- -
- Current - Output / Channel:
- 1.6A
- Frequency:
- 400kHz ~ 2.2MHz
- Dimming:
- Analog, PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-HTSSOP
TPS92520QDADRQ1 FAQ
1.How can I place an order for TPS92520QDADRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92520QDADRQ1 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 TPS92520QDADRQ1 reliable?
The price and inventory of TPS92520QDADRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92520QDADRQ1 is usually 5 days.
3.What payment methods are accepted for TPS92520QDADRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92520QDADRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92520QDADRQ1?
TPS92520QDADRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92520QDADRQ1 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 TPS92520QDADRQ1?
For technical support, including TPS92520QDADRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92520QDADRQ1 requirements.
6.How does Aetrix verify that TPS92520QDADRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS92520QDADRQ1 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 TPS92520QDADRQ1 meets industry standards.
7.What is the process for return or replacement of TPS92520QDADRQ1?
All TPS92520QDADRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS92520QDADRQ1, 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 TPS92520QDADRQ1 part is unused and in its original packaging.
Return procedure for TPS92520QDADRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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