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Texas Instruments TPS92692PWPR
- Part No.:
- TPS92692PWPR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS92692PWPR.pdf
- Description:
- IC LED DRIVER CTRLR PWM 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:18,902
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Product details
Overview
TPS92692PWPR from Texas Instruments is a high-accuracy peak current mode LED controller for boost/buck LED driver topologies, supporting 4.5 V to 65 V input, ±4% LED current accuracy over –40°C to 150°C, and spread-spectrum frequency modulation for EMI reduction. It integrates rail-to-rail current sensing, analog/PWM dimming, and fault protection with IMON reporting and open-drain FLT flag - used in automotive exterior lighting and emergency signage.
For engineers reviewing the TPS92692PWPR datasheet, TPS92692PWPR pinout, TPS92692PWPR application, or TPS92692PWPR equivalent, key selection criteria include its 20-pin HTSSOP package with PowerPAD™, programmable switching frequency (80–800 kHz), internal PWM generator with RAMP pin control, P-channel series FET gate drive (PDRV), and dual dimming support (IADJ analog + DIM/PWM).
Technical Context
The TPS92692PWPR implements fixed-frequency peak current mode control with adaptive slope compensation (SLOPE pin) and cycle-by-cycle current limiting via IS input. Its rail-to-rail current sense amplifier (CSP/CSN) delivers <±4% LED current accuracy across temperature by referencing IADJ voltage (140 mV–2.25 V) to set VCSP–CSN threshold (100.5 mV–170.7 mV).
It features dual dimming paths: internal PWM generation (DIM/PWM pin vs. triangle wave from RAMP) and direct external PWM injection; both modulate GATE and PDRV outputs. Fault detection includes LED overcurrent (IS), output overvoltage/undervoltage (OV), thermal shutdown (175°C), and soft-start (SS) with 7–12.8 µA source current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 65 V - supports wide automotive battery crank (4.5 V) and industrial bus rails without external pre-regulation. |
| LED Current Accuracy | Better than ±4% over –40°C to 150°C - enables stable brightness in under-hood and outdoor lighting without recalibration. |
| Switching Frequency | 80 kHz to 800 kHz (RT-programmable) - allows optimization of magnetics size vs. EMI performance in space-constrained designs. |
| Analog Dimming Range | 15:1 linear contrast (via IADJ 140 mV–2.25 V) - supports precise thermal derating and binning compensation without digital interface. |
| PWM Dimming Range | Over 1000:1 (direct PWM input) - meets stringent flicker-free requirements in driver monitoring systems (DMS) and safety-critical lighting. |
| Fault Protection | LED short/open, output OV/UVP, thermal shutdown, cycle-by-cycle current limit - reduces need for external supervision circuitry. |
| Current Monitor Output | VIMON = 14 × ILED × RCS - provides real-time diagnostic feedback for functional safety compliance (e.g., ASIL-B). |
Pinout & Package
TPS92692PWPR is housed in a 20-pin HTSSOP package (5.10 mm × 6.60 mm) with exposed thermal pad (PowerPAD™) requiring PCB ground connection via multiple vias for thermal reliability and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Input supply rail | 65-V-rated input for internal regulators; bypassed with RC low-pass filter (10 Ω + 10 nF) near pin for noise immunity. |
| VREF (2) | 5 V reference output | Stable 4.77–5.15 V bias for external circuits; requires 2.2–4.7 µF local ceramic decoupling. |
| FLT (3) | Open-drain fault flag | Active-low indicator for OV, UVP, overcurrent; pulled up to VREF to generate logic-level signal for MCU interrupt. |
| SS (4) | Soft-start timing | Capacitor-programmed startup ramp; shorting to GND disables switching - enables system-level enable sequencing. |
| DM (5) | Spread-spectrum modulator | Capacitor sets triangle wave frequency (0.1–12 kHz); grounding disables spread spectrum for deterministic EMI testing. |
| RT (6) | Oscillator frequency set | Resistor to GND programs fSW (80–800 kHz); sync input accepts external clock via 100 nF coupling capacitor. |
| COMP (7) | Error amplifier output | Transconductance amplifier (121 µA/V) output; connects compensation network (R/C) for loop stability in current regulation. |
| IMON (8) | LED current monitor | Reports instantaneous ILED as analog voltage (VIMON = 14 × ILED × RCS); bypassed with 1 nF cap to GND for bandwidth control. |
| IADJ (9) | Analog dimming reference | High-impedance input (10.5 nA bias) setting VCSP–CSN threshold; 140 mV–2.25 V range enables 15:1 linear dimming. |
| DIM/PWM (10) | Dimming command input | Accepts 1–3 V analog voltage (for internal PWM gen) or direct PWM signal; Schmitt-triggered (1.8–2.2 V thresholds). |
| RAMP (11) | PWM generator timing | Capacitor sets internal triangle wave frequency (100–2000 Hz); 249 kΩ to GND disables generator for external PWM only. |
| PDRV (12) | P-channel FET gate driver | Drives external P-MOSFET for series dimming/fault disconnect; 7.4 V on-state ensures full enhancement at 14 V LED string. |
| CSN (13) | Current sense negative | Connects directly to low-side of sense resistor (RCS); rail-to-rail input enables accurate sensing down to 0 V common-mode. |
| CSP (14) | Current sense positive | Connects directly to high-side of RCS; supports up to 60 V common-mode voltage - suitable for high-side sensing in buck configurations. |
| OV (15) | Output voltage monitor | Resistor divider input for OV/UVP thresholds (1.228 V OVP, 100 mV UVP); blanking period (4 µs) prevents false trips during transients. |
| SLOPE (16) | Slope compensation adjust | Resistor to GND sets ramp amplitude (72–410 mV) to stabilize current mode control in boost/buck converters with duty >50%. |
| GND (17) | Analog & power ground | Common return for all signals; must connect to exposed thermal pad via multiple vias for thermal and EMI performance. |
| IS (18) | Switch current sense | Monitors main switch current with 250 mV internal reference; leading-edge blanking (88–158 ns) rejects MOSFET turn-on spikes. |
| GATE (19) | N-channel MOSFET driver | Drives external N-MOSFET switch; 4.3–10.5 Ω pull-down/pull-up resistance supports fast switching with 1 nF gate load. |
| VCC (20) | 7.5 V bias regulator output | Internal LDO output (7.0–8.0 V); powers internal circuitry and GATE driver; requires 2.2–4.7 µF ceramic decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum frequency modulation | Reduces peak EMI by spreading switching energy across 0.1–12 kHz band - simplifies compliance with CISPR 25 Class 5 in automotive applications. |
| Integrated P-channel gate driver (PDRV) | Enables series FET dimming and LED string disconnect during fault - eliminates need for external high-side driver in safety-critical lighting. |
| Rail-to-rail current sense amplifier | Supports 0 V to 60 V common-mode range on CSP/CSN - allows flexible placement of sense resistor in boost, buck, or buck-boost topologies. |
| Comprehensive fault reporting | Separate IMON analog current report and open-drain FLT flag provide redundant diagnostics for ASIL-B functional safety architectures. |
| Thermal shutdown with hysteresis | 175°C trip point with 25°C hysteresis prevents thermal cycling - ensures reliable operation in sealed headlamp enclosures. |
Applications
| Automotive Exterior Lighting | Driver Monitoring Systems (DMS) |
|---|---|
Use Scenario: High-brightness LED headlamps and DRLs in passenger vehicles requiring AEC-Q100 Grade 1 qualification and robust EMI performance. IC Role / Device Role / Timing Role: Primary LED current controller implementing boost topology with spread-spectrum switching and analog dimming for adaptive beam shaping. Use Value: ±4% current accuracy over –40°C to 150°C ensures consistent lumen output across ambient extremes; PDRV enables fail-safe LED string disconnect. |
Use Scenario: IR LED illumination modules for in-cabin camera-based driver attention monitoring, demanding flicker-free operation and high dimming resolution. IC Role / Device Role / Timing Role: Constant-current driver for pulsed IR LEDs, using direct PWM dimming (>1000:1 range) synchronized to camera frame rate via RAMP pin. Use Value: 1000:1 dimming range eliminates visible flicker at 60+ fps; IMON output enables real-time LED health monitoring for functional safety compliance. |
| Exit Signs & Emergency Lighting | Industrial General Lighting |
Use Scenario: UL 924-compliant self-contained exit signs with battery backup, requiring wide input range (6–65 V DC) and long-term current stability. IC Role / Device Role / Timing Role: Buck-boost LED controller maintaining constant current during AC dropout and battery discharge cycles. Use Value: 4.5 V minimum VIN supports deep battery discharge; OV/UVP protection prevents overcharging or undervoltage cutoff of backup batteries. |
Use Scenario: Commercial LED troffers and high-bay fixtures operating from 24–48 V DC industrial buses with stringent thermal management requirements. IC Role / Device Role / Timing Role: High-efficiency boost LED driver with thermal shutdown (175°C) and remote SS control for centralized system enable/disable. Use Value: Thermal pad (PowerPAD™) and RθJA = 40.8°C/W enable operation in enclosed fixtures; SS pin allows coordinated power-up with building management systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409HVMM/NOPB | Fixed-frequency current mode controller without spread-spectrum EMI reduction, no integrated PDRV, lower accuracy (±6% over temp). | Lacks internal PWM generator and IMON output - requires external circuitry for analog dimming and diagnostics. | Choose for cost-sensitive, non-automotive applications where EMI and functional safety are less critical. |
| MAX16834ATL+T | Higher integration (integrated high-side gate driver), but narrower input range (6.5–65 V), no spread-spectrum, and no PDRV output. | Designed for high-side buck LED drivers; lacks series-FET dimming capability and comprehensive fault flagging. | Prefer when driving high-side buck configurations with minimal external components, but not for series-dimming safety-critical use cases. |
Compared with LM3409HVMM/NOPB and MAX16834ATL+T, the TPS92692PWPR uniquely combines AEC-Q100 Grade 1 qualification, spread-spectrum EMI reduction, integrated PDRV for fail-safe dimming, and dual analog/PWM dimming - making it optimal for automotive and safety-certified lighting where reliability and regulatory compliance are mandatory.
Availability
TPS92692PWPR is available at Aetrix Electronics and suitable for automotive exterior lighting, driver monitoring systems (DMS), and emergency signage requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPS92692PWPR 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 power management ICs, with decades of automotive-grade design expertise and rigorous AEC-Q100 validation processes.
The TPS92692PWPR belongs to TI's high-accuracy LED controller product line, engineered specifically for automotive and industrial lighting applications demanding precision current regulation, robust fault handling, and EMI-compliant operation in harsh environments.
FAQ
What is the maximum LED string voltage supported by the TPS92692PWPR?
The TPS92692PWPR itself does not impose a maximum LED string voltage; instead, its OV pin monitors output voltage via an external resistor divider. The device supports output voltages up to 65 V (limited by CSP/CSN common-mode rating), enabling configurations with up to ~20 white LEDs (3.2 V each) in series. System-level voltage limits depend on external MOSFET and diode ratings.
Does the TPS92692PWPR support both boost and buck LED driver topologies?
Yes, the TPS92692PWPR supports both boost and buck topologies through its rail-to-rail current sense amplifier (CSP/CSN inputs), which operates from 0 V to 60 V common-mode voltage. This flexibility allows placement of the sense resistor on either the high-side (buck) or low-side (boost) of the LED string, enabling single-controller reuse across multiple lighting architectures.
How is analog dimming implemented on the TPS92692PWPR?
Analog dimming on the TPS92692PWPR is implemented via the IADJ pin: applying a voltage from 140 mV to 2.25 V sets the internal current sense threshold (VCSP–CSN) linearly from ~100 mV to ~171 mV, achieving a 15:1 contrast ratio. The high-impedance input (10.5 nA bias) minimizes loading, allowing simple resistor-divider or DAC-based control without buffering.
What protection features does the TPS92692PWPR include?
The TPS92692PWPR includes cycle-by-cycle overcurrent protection (via IS pin), output overvoltage/undervoltage protection (via OV pin), thermal shutdown (175°C with 25°C hysteresis), VCC undervoltage lockout (4.1 V falling threshold), and LED short-circuit detection. Fault conditions trigger the open-drain FLT pin and optionally auto-restart (hiccup) mode when FLT is tied to SS.
Can the TPS92692PWPR be synchronized to an external clock?
Yes, the TPS92692PWPR supports external clock synchronization via the RT pin: an external clock signal coupled through a 100 nF capacitor enables precise timing alignment across multiple LED drivers - critical for reducing beat frequencies and meeting strict EMI limits in multi-channel lighting systems.
TPS92692PWPR 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS92692PWPR FAQ
1.How can I place an order for TPS92692PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92692PWPR 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 TPS92692PWPR reliable?
The price and inventory of TPS92692PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92692PWPR is usually 5 days.
3.What payment methods are accepted for TPS92692PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92692PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92692PWPR?
TPS92692PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92692PWPR 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 TPS92692PWPR?
For technical support, including TPS92692PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92692PWPR requirements.
6.How does Aetrix verify that TPS92692PWPR is sourced from the original manufacturer or authorized distributors?
All TPS92692PWPR 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 TPS92692PWPR meets industry standards.
7.What is the process for return or replacement of TPS92692PWPR?
All TPS92692PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS92692PWPR, 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 TPS92692PWPR part is unused and in its original packaging.
Return procedure for TPS92692PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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