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Texas Instruments TPS92621QDGNRQ1
- Part No.:
- TPS92621QDGNRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-PowerTSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS92621QDGNRQ1.pdf
- Description:
- AUTOMOTIVE, SINGLE-CHANNEL HIGH-
- Quantity:
- Payment:
- Shipping:
Inventory:2,148
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Product details
Overview
TPS92621QDGNRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive high-side linear LED driver with thermal sharing via external shunt resistor, delivering up to 300 mA output current with ±5% accuracy over –40°C to +125°C ambient, low dropout (600 mV max at 300 mA), and integrated diagnostics for LED open/short-to-GND faults. It enables rear lamp and interior lighting in battery-powered vehicle systems.
For engineers reviewing the TPS92621QDGNRQ1 datasheet, TPS92621QDGNRQ1 pinout, TPS92621QDGNRQ1 application, or TPS92621QDGNRQ1 equivalent, key selection criteria include its dual-output thermal sharing architecture (OUT/RES), fault bus configurability for one-fails-all-fail systems, PWM dimming support ≥100 Hz, diagnostic enable (DIAGEN) threshold control, and HVSSOP-8 package with PowerPAD™ for enhanced thermal performance.
Technical Context
The TPS92621QDGNRQ1 implements a high-side linear current regulation architecture using an external RSNS resistor to set output current via 150 mV sense voltage (VCS_REG). It dynamically splits total current between OUT and RES pins based on supply-to-LED forward voltage headroom - maximizing RES current under high dropout to offload power dissipation.
Diagnostics are hardware-automated: LED open detection triggers only when DIAGEN is high and monitors VIN–VOUT against rising/falling thresholds (180–420 mV / 510 mV); short-to-GND detection compares VOUT/VRES against 0.855–1.26 V thresholds with 125 µs deglitching and auto-retry at 0.64–1.53 mA. Fault reporting uses open-drain FAULT with internal 3 mA pull-down on failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 300 mA total, split between OUT and RES pins; enables high-brightness single-string LED loads without external switching. |
| Current Accuracy | ±5% over –40°C to +125°C ambient; ensures consistent luminance across automotive temperature extremes. |
| Dropout Voltage | Max 600 mV at 300 mA; allows operation with minimal headroom above LED string forward voltage. |
| Supply Range | 4.5 V to 40 V DC; directly compatible with 12 V/24 V automotive batteries including cold-crank and load-dump transients. |
| Thermal Shutdown | 157–187°C junction threshold with 15°C hysteresis; protects device during sustained overload or poor heatsinking. |
| PWM Dimming | Supports 100 Hz–1 kHz input; achieves flicker-free brightness control with <5 µs timing delay and <6 µs current fall time. |
| Fault Reporting | Open-drain FAULT pin with 3 mA internal pull-down on failure; configurable as one-fails-all-fail bus with other TPS926xx-Q1 devices. |
Pinout & Package
HVSSOP-8 (DGN) package with 3.00 mm × 3.00 mm body and exposed thermal pad (PowerPAD™) for low RθJB = 25.6°C/W; optimized for surface-mount assembly and board-level thermal management in automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high logic control; places device in ultra-low shutdown mode (11.4–15 µA) when pulled low. |
| DIAGEN | Diagnostics enable input | Logic-controlled gate for LED open detection; prevents false triggers during low-voltage operation (<8 V). |
| PWM | Brightness control input | Accepts 1.1–1.26 V logic-high signal; enables/disables output current and supports analog-like dimming via duty cycle. |
| FAULT | Open-drain fault output | Asserts low on LED open/short or thermal fault; supports wired-OR fault bus with other TPS926xx-Q1 drivers. |
| RES | Thermal-sharing current output | Delivers portion of total current through external shunt resistor to reduce die temperature rise. |
| OUT | Main high-side current output | Direct connection to LED anode; carries residual current not routed through RES pin. |
| IN | Current-sense input | Connects to high-side RSNS; regulates current by maintaining 144–156 mV across sense resistor. |
| SUPPLY | Power input | Accepts 4.5–40 V; includes internal POR (3.6–4.0 V rising threshold) and fault-mode quiescent current ≤0.35 mA. |
| GND / DAP | Ground & thermal pad | Primary return path and thermal conduction interface; requires PCB copper fill for optimal RθJB. |
Key Features
| Feature | Design Value |
|---|---|
| Thermal sharing via RES pin | Offloads >95% of current to external shunt resistor under high-dropout conditions, reducing die temperature rise by up to 40°C vs. single-output drivers. |
| Auto-recovering diagnostics | LED open and short-to-GND faults trigger automatic retry at 0.64–1.53 mA; restores full current within 50 µs after fault removal. |
| One-fails-all-fail fault bus | Multiple TPS92621QDGNRQ1 devices can share FAULT pin; any channel fault pulls entire bus low for system-level fail-safe response. |
| AEC-Q100 Grade 1 compliance | Qualified for –40°C to +125°C ambient operation with full electrical characterization and ESD robustness (HBM ±2 kV, CDM ±500 V). |
| Low fault-mode supply current | Draws ≤0.35 mA when FAULT is externally pulled low; minimizes battery drain during persistent fault conditions. |
Applications
| Rear Lamp Systems | Interior Lighting |
|---|---|
|
Use Scenario: Driving multi-LED strings in CHMSL (center high-mounted stop lamp) and side marker lamps under 12 V battery with wide transient range. IC Role / Device Role / Timing Role: High-side constant-current source with thermal sharing to maintain stable luminance despite ambient temperature swings and voltage sags. Use Value: Eliminates need for external MOSFETs or heat sinks; ±5% current accuracy ensures regulatory-compliant photometric output across lifetime. |
Use Scenario: Powering overhead console and reading lamps with smooth PWM dimming and zero-flicker performance. IC Role / Device Role / Timing Role: Single-channel LED driver with <6 µs current fall time and 200 Hz–1 kHz PWM support for seamless brightness control. Use Value: Enables Class A interior lighting with no visible artifacts; DIAGEN pin prevents false open-circuit alarms during ignition cranking. |
| Exterior Small Lights | Diagnostic-Critical Modules |
|
Use Scenario: Illuminating door handles and blind spot indicators where space constraints limit thermal mass. IC Role / Device Role / Timing Role: Thermal-sharing driver routing >95% of current through RES pin to external resistor, minimizing PCB heating. Use Value: Achieves 150°C junction rating with standard FR4; avoids derating or forced air cooling in compact housings. |
Use Scenario: Implementing ASIL-B compliant lighting with fault detection, auto-recovery, and system-level fault propagation. IC Role / Device Role / Timing Role: Diagnostics engine with 125 µs deglitching, 50 µs recovery, and open-drain FAULT bus for centralized monitoring. Use Value: Meets ISO 26262 requirements for fault detection latency and safe state transition without software intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS92622QDGNRQ1 | Dual-channel version in same HVSSOP-8 package; shares identical thermal sharing, diagnostics, and AEC-Q100 Grade 1 specs per channel. | Replaces two TPS92621QDGNRQ1 units in space-constrained dual-lamp designs; reduces BOM count but increases channel crosstalk risk. | Select when driving two independent LED strings with shared thermal budget and fault bus; not drop-in for single-channel layouts. |
| TPS92610QDGNTQ1 | Single-channel, no RES pin; 200 mA max output, higher dropout (1.2 V @ 200 mA), no thermal sharing capability. | Lacks current splitting and external power dissipation; suited for lower-power interior lights where die temperature is not limiting. | Choose for cost-sensitive, low-thermal-load applications where 300 mA and thermal sharing are unnecessary. |
Compared with TPS92622QDGNRQ1 and TPS92610QDGNTQ1, the TPS92621QDGNRQ1 uniquely balances single-channel simplicity with 300 mA capability and active thermal redistribution-making it optimal for mid-power exterior lighting where reliability and thermal headroom are critical.
Availability
TPS92621QDGNRQ1 is available at Aetrix Electronics and suitable for automotive rear lamp systems, interior lighting modules, and exterior small-light applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS92621QDGNRQ1 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 AEC-Q100 qualification expertise and broad automotive system solutions.
The TPS92621QDGNRQ1 belongs to TI's automotive LED driver portfolio designed specifically for thermally constrained exterior and interior lighting, emphasizing fault resilience, thermal sharing, and ASIL-ready diagnostics.
FAQ
What is the maximum output current capability of the TPS92621QDGNRQ1?
The TPS92621QDGNRQ1 delivers up to 300 mA total output current, dynamically distributed between the OUT and RES pins based on supply headroom and external resistor values. This current is maintained with ±5% accuracy across –40°C to +125°C ambient temperature, enabling high-brightness LED operation in demanding automotive environments without external current amplification.
How does the thermal sharing function work in the TPS92621QDGNRQ1?
The TPS92621QDGNRQ1 routes a controllable portion of total output current through the RES pin to an external shunt resistor, thereby diverting power dissipation away from the IC die. When supply-to-LED forward voltage headroom is large, >95% of current flows through RES; under low headroom, current shifts to OUT. This maintains junction temperature below 150°C even in sealed enclosures without forced airflow.
Can the TPS92621QDGNRQ1 be used in one-fails-all-fail fault configurations?
Yes-the TPS92621QDGNRQ1 supports one-fails-all-fail operation by connecting its open-drain FAULT pin in wired-OR configuration with other TPS926xx-Q1 devices (e.g., TPS92622QDGNRQ1, TPS92630QDGNRQ1). Any channel fault pulls the shared bus low, triggering system-level safety responses without additional logic or microcontroller intervention.
What is the role of the DIAGEN pin on the TPS92621QDGNRQ1?
The DIAGEN pin enables or disables LED open-circuit detection. When pulled high (≥1.14 V), it activates open-circuit monitoring of VIN–VOUT against 180–420 mV thresholds; when low (<1.045 V), it suppresses detection to prevent false alarms during low-supply conditions such as engine cranking. This ensures reliable diagnostics without compromising startup behavior.
Does the TPS92621QDGNRQ1 support PWM dimming, and what frequency range is recommended?
Yes-the TPS92621QDGNRQ1 accepts PWM signals on the dedicated PWM pin for brightness control. TI recommends 200 Hz with 1%–100% duty cycle for flicker-free operation; the device supports 100 Hz–1 kHz inputs with <5 µs rising and <6 µs falling edge delays, ensuring precise current modulation and minimal temporal light artifacts in automotive cabin and exterior lighting.
TPS92621QDGNRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerTSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- 0V ~ 40V
- Current - Output / Channel:
- 300mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
TPS92621QDGNRQ1 FAQ
1.How can I place an order for TPS92621QDGNRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92621QDGNRQ1 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 TPS92621QDGNRQ1 reliable?
The price and inventory of TPS92621QDGNRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92621QDGNRQ1 is usually 5 days.
3.What payment methods are accepted for TPS92621QDGNRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92621QDGNRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92621QDGNRQ1?
TPS92621QDGNRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92621QDGNRQ1 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 TPS92621QDGNRQ1?
For technical support, including TPS92621QDGNRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92621QDGNRQ1 requirements.
6.How does Aetrix verify that TPS92621QDGNRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS92621QDGNRQ1 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 TPS92621QDGNRQ1 meets industry standards.
7.What is the process for return or replacement of TPS92621QDGNRQ1?
All TPS92621QDGNRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS92621QDGNRQ1, 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 TPS92621QDGNRQ1 part is unused and in its original packaging.
Return procedure for TPS92621QDGNRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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