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Texas Instruments TPS92692QPWPTQ1
- Part No.:
- TPS92692QPWPTQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS92692QPWPTQ1.pdf
- Description:
- IC LED DRIVER CTRLR PWM 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,253
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Product details
Overview
TPS92692QPWPTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LED controller for high-accuracy constant-current LED drivers in boost, buck, or buck-boost topologies. It delivers ±4% LED current accuracy over –40°C to +150°C, supports 4.5 V–65 V input, integrates spread-spectrum frequency modulation for EMI reduction, and provides dual dimming (analog IADJ and PWM DIM/PWM) with >15:1 analog and >1000:1 PWM dimming range - used in automotive exterior lighting and driver monitoring systems.
For engineers reviewing the TPS92692QPWPTQ1 datasheet, TPS92692QPWPTQ1 pinout, TPS92692QPWPTQ1 application, or TPS92692QPWPTQ1 equivalent, key selection considerations include its peak-current-mode control architecture, rail-to-rail current sense amplifier (CSP/CSN), integrated P-channel gate driver (PDRV), fault reporting via IMON and open-drain FLT, and thermal shutdown at 175°C.
Technical Context
The TPS92692QPWPTQ1 implements fixed-frequency peak-current-mode control with adaptive slope compensation (SLOPE pin) and internal triangle-wave PWM generation (RAMP pin). Its rail-to-rail current sense amplifier enables accurate LED current measurement across wide common-mode voltage (6.5 V–60 V) and supports external current sensing via CSP/CSN with 14× gain and 170.7 mV nominal threshold at 2.1 V IADJ.
It integrates dual regulation paths: a 7.5 V/36 mA LDO for GATE driver and internal circuitry (VCC), and a 5 V/36 mA reference supply (VREF); both feature UVLO (4.5 V rising / 4.1 V falling) and current limiting. Fault protection includes cycle-by-cycle IS overcurrent detection (250 mV threshold), OV/UVP (programmable via resistor divider on OV), thermal shutdown (175°C), and auto-restart hiccup mode enabled by FLT-to-SS connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 65 V - supports automotive battery crank (4.5 V) and load-dump transients without external protection. |
| LED Current Accuracy | Better than ±4% over –40°C to +150°C - enables stable brightness in under-hood and headlamp applications without recalibration. |
| Dimming Range | Analog: >15:1 linear (via IADJ 0.14 V–2.25 V); PWM: >1000:1 (direct or internal generator) - meets stringent automotive ADB and DMS contrast requirements. |
| Switching Frequency | 80 kHz to 800 kHz (RT-programmable) - allows optimization of magnetics size vs. EMI performance in space-constrained modules. |
| Current Sense Threshold | 170.7 mV nominal (at VIADJ = 2.1 V), adjustable via IADJ - sets LED current without external DAC; supports binning and thermal derating. |
| Fault Reporting | IMON output = 14 × ILED × RCS; open-drain FLT flag for OV/UVP/IS faults - enables real-time diagnostics and fail-safe LED string monitoring. |
| Thermal Protection | Shutdown at 175°C with 25°C hysteresis - prevents damage during sustained overloads or poor heatsinking in sealed headlamp housings. |
Pinout & Package
TPS92692QPWPTQ1 is housed in a thermally enhanced 20-pin HTSSOP (PWP) package (5.10 mm × 6.60 mm) with exposed PowerPAD™ thermal pad that must be soldered to PCB ground plane using multiple vias for junction-to-board thermal resistance of 2.3°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | High-voltage input supply | Bypassed with RC filter (10 Ω + 10 nF) to suppress noise from automotive battery rail before internal regulators. |
| VREF (2) | 5 V reference output | Powers external circuitry (e.g., ADCs, sensors); decoupled with 2.2–4.7 µF ceramic capacitor near pin. |
| FLT (3) | Open-drain fault indicator | Asserts low on OV/UVP/IS fault; tied to SS to enable auto-restart hiccup mode after fault clearance. |
| SS (4) | Soft-start timing and fault reset | Capacitor sets startup ramp time; shorting to GND forces shutdown - used for system-level enable/disable. |
| DM (5) | Spread-spectrum modulation control | Capacitor to GND sets triangle-wave frequency (0.1–12 kHz); grounding disables spread spectrum. |
| RT (6) | Oscillator frequency programming | Resistor to GND sets switching frequency (80–800 kHz); sync clock accepted via AC coupling. |
| COMP (7) | Error amplifier output | Transconductance node (121 µA/V); connects compensation network (R/C) for loop stability in current regulation. |
| IMON (8) | LED current monitor output | Voltage output = 14 × ILED × RCS; enables real-time current readback and cable-fault detection. |
| IADJ (9) | Analog current reference input | High-impedance (10.5 nA bias) input; 0.14–2.25 V range sets VCSP-CSN threshold linearly for analog dimming. |
| DIM/PWM (10) | Dimming command interface | Accepts 1–3 V analog input for internal PWM generation or direct PWM signal (with RAMP=249 kΩ to GND). |
| RAMP (11) | Internal PWM generator timing | Capacitor to GND sets triangle wave frequency (100–2000 Hz); 249 kΩ to GND disables generator for direct PWM. |
| PDRV (12) | P-channel series FET gate driver | Drives external P-MOSFET for series PWM dimming and LED string disconnect during fault conditions. |
| CSN (13) | Current sense negative input | Connects directly to low-side of current sense resistor (RCS) - no external filtering required. |
| CSP (14) | Current sense positive input | Connects directly to high-side of RCS; supports common-mode up to 60 V - enables high-side sensing in buck-boost. |
| OV (15) | Output voltage monitor | Resistor divider from LED string cathode to GND sets OV/UVP thresholds (1.228 V OVP, 100 mV UVP typical). |
| SLOPE (16) | Adaptive slope compensation | Resistor to GND sets ramp amplitude to prevent subharmonic oscillation in duty cycles >50%. |
| GND (17) | Analog & power ground | Single-point return for all analog and power circuits; connected to thermal pad for optimal thermal performance. |
| IS (18) | Switch current sense input | Monitors main switch current; 250 mV threshold triggers cycle-by-cycle current limit and fault reporting. |
| GATE (19) | N-channel MOSFET gate driver | Drives external N-MOSFET switch; 5.4 Ω high-side / 4.3 Ω low-side resistance supports fast turn-on/off. |
| VCC (20) | 7.5 V bias supply output | Powers internal logic and GATE driver; requires 2.2–4.7 µF local ceramic decoupling; UVLO at 4.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum frequency modulation | Reduces peak EMI by spreading switching energy across 0.1–12 kHz band - eliminates need for large EMI filters in compact headlamp modules. |
| Rail-to-rail current sense amplifier | Supports 6.5 V–60 V common-mode range and 14× gain - enables accurate LED current sensing in high-side buck-boost configurations without level-shifting. |
| Integrated P-channel gate driver (PDRV) | Provides dedicated output to drive series P-MOSFET for safe LED string disconnect during fault or standby - critical for ASIL-B functional safety compliance. |
| Comprehensive fault reporting | Separate IMON analog current readback and open-drain FLT flag for OV/UVP/IS faults - enables layered diagnostics per ISO 26262 ASIL requirements. |
| Automotive-grade thermal robustness | Rated for –40°C to +150°C junction temperature with 175°C thermal shutdown and 25°C hysteresis - validated for under-hood placement in modern LED headlamps. |
Applications
| Automotive Exterior Lighting | Driver Monitoring Systems (DMS) |
|---|---|
|
Use Scenario: Adaptive driving beam (ADB) headlamps requiring precise, flicker-free LED current control across wide ambient temperatures and input voltages. IC Role / Device Role / Timing Role: Primary LED current controller implementing peak-current-mode regulation with analog+PWM dimming for pixel-level light shaping. Use Value: ±4% current accuracy ensures consistent lumen output and color point across vehicle lifetime; spread spectrum reduces conducted EMI to meet CISPR 25 Class 5 limits. |
Use Scenario: In-cabin infrared LED illumination for driver attention monitoring, requiring silent, reliable dimming without visible flicker. IC Role / Device Role / Timing Role: Constant-current LED driver with >1000:1 PWM dimming range and low-noise operation to avoid interference with IR camera sensors. Use Value: Internal PWM generator eliminates external timing IC; IMON output enables closed-loop brightness calibration against camera feedback. |
| Exit Signs & Emergency Lighting | Commercial LED Architectural Lighting |
|
Use Scenario: Self-contained emergency exit signs with battery backup, needing wide-input operation (6–65 V) and long-term reliability. IC Role / Device Role / Timing Role: High-voltage LED controller supporting buck-boost topology to maintain regulated current during AC/DC and battery transitions. Use Value: 4.5 V minimum input supports deep battery discharge; thermal shutdown and OV/UVP protect against battery overcharge and LED open-circuit failure. |
Use Scenario: Outdoor LED streetlights operating in harsh environments with wide temperature swings and lightning-induced surges. IC Role / Device Role / Timing Role: Robust LED driver controller with 65 V absolute max input rating and fault-flag-based system-level shutdown coordination. Use Value: Integrated FLT and IMON simplify BMS integration; spread spectrum minimizes radiated emissions in dense luminaire arrays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409QMH/NOPB | Non-synchronous buck controller; no integrated PDRV; no spread spectrum; ±6% current accuracy over –40°C to +125°C. | Lacks series-FET dimming and automotive-grade thermal range; suitable for cost-sensitive non-AEC-Q100 interior lighting. | Select when budget constraints outweigh need for AEC-Q100 qualification and advanced dimming features. |
| MAX20050ATP/V+T | Automotive synchronous buck LED controller; integrated high-side switch; no PDRV; ±3% accuracy; no spread spectrum. | Fixed-buck only; no boost/buck-boost flexibility; lacks IMON analog reporting and independent fault flag. | Choose for compact, single-topology designs where integrated switch simplifies layout but dimming flexibility is secondary. |
Compared with LM3409QMH/NOPB and MAX20050ATP/V+T, the TPS92692QPWPTQ1 uniquely combines AEC-Q100 Grade 1 qualification, programmable spread spectrum, dual dimming interfaces, and dedicated PDRV for fault-safe LED disconnection - making it the only option qualified for ASIL-B exterior lighting systems requiring full diagnostic coverage.
Availability
TPS92692QPWPTQ1 is available at Aetrix Electronics and suitable for automotive exterior lighting, driver monitoring systems (DMS), and emergency lighting applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for TPS92692QPWPTQ1 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 electronics, with decades of experience in high-reliability power management solutions.
The TPS92692QPWPTQ1 belongs to TI's automotive LED controller product line, designed specifically for AEC-Q100 Grade 1 exterior lighting systems requiring precision current regulation, comprehensive fault diagnostics, and EMI-compliant operation in harsh environments.
FAQ
What is the maximum input voltage supported by the TPS92692QPWPTQ1?
The TPS92692QPWPTQ1 supports an absolute maximum input voltage of 65 V on the VIN pin, with recommended operation from 4.5 V to 65 V. This range accommodates automotive battery crank (4.5 V) and load-dump events without external clamping, making it suitable for direct connection to 12 V and 24 V vehicle electrical systems. The TPS92692QPWPTQ1 internal regulators remain functional across this full range.
How does the TPS92692QPWPTQ1 achieve ±4% LED current accuracy over temperature?
The TPS92692QPWPTQ1 achieves better than ±4% LED current accuracy from –40°C to +150°C through a combination of rail-to-rail current sense amplifier design, temperature-compensated internal references, and factory-trimmed current sense threshold (170.7 mV nominal at 2.1 V IADJ). Its IADJ input scales the threshold linearly, enabling system-level thermal derating without sacrificing accuracy - a key requirement verified in AEC-Q100 stress testing for the TPS92692QPWPTQ1.
Can the TPS92692QPWPTQ1 drive both boost and buck LED topologies?
Yes, the TPS92692QPWPTQ1 is explicitly designed to support step-up (boost), step-down (buck), and buck-boost LED driver topologies. Its rail-to-rail current sense amplifier (CSP/CSN) accepts common-mode voltages from 6.5 V to 60 V, and its peak-current-mode control architecture adapts to inductor current direction and polarity. Reference schematics in the TPS92692QPWPTQ1 datasheet confirm functional operation in all three configurations.
What is the function of the PDRV pin on the TPS92692QPWPTQ1?
The PDRV pin on the TPS92692QPWPTQ1 is a dedicated gate driver output for an external P-channel MOSFET placed in series with the LED string. It enables active PWM dimming independent of the main switching FET and provides fault-safe LED string disconnect during overvoltage, undervoltage, or thermal shutdown events - a critical feature for ASIL-B compliant automotive lighting systems using the TPS92692QPWPTQ1.
Does the TPS92692QPWPTQ1 include built-in EMI reduction features?
Yes, the TPS92692QPWPTQ1 incorporates spread-spectrum frequency modulation (SSFM) controlled via the DM pin. By modulating the switching frequency with a user-programmable triangle wave (0.1–12 kHz), it spreads electromagnetic energy across a wider bandwidth, reducing peak radiated and conducted emissions. This feature is confirmed in the TPS92692QPWPTQ1 datasheet and eliminates the need for additional EMI filter components in space-constrained automotive modules.
TPS92692QPWPTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 65V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 80kHz ~ 800kHz
- Dimming:
- Analog, PWM
- Applications:
- Lighting, Signage
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS92692QPWPTQ1 FAQ
1.How can I place an order for TPS92692QPWPTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92692QPWPTQ1 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 TPS92692QPWPTQ1 reliable?
The price and inventory of TPS92692QPWPTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92692QPWPTQ1 is usually 5 days.
3.What payment methods are accepted for TPS92692QPWPTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92692QPWPTQ1 transactions.
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4.How is shipping managed for TPS92692QPWPTQ1?
TPS92692QPWPTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92692QPWPTQ1 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 TPS92692QPWPTQ1?
For technical support, including TPS92692QPWPTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92692QPWPTQ1 requirements.
6.How does Aetrix verify that TPS92692QPWPTQ1 is sourced from the original manufacturer or authorized distributors?
All TPS92692QPWPTQ1 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 TPS92692QPWPTQ1 meets industry standards.
7.What is the process for return or replacement of TPS92692QPWPTQ1?
All TPS92692QPWPTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS92692QPWPTQ1, 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 TPS92692QPWPTQ1 part is unused and in its original packaging.
Return procedure for TPS92692QPWPTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS92692QPWPTQ1 Tags
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