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Texas Instruments TPS92692PWPT
- Part No.:
- TPS92692PWPT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS92692PWPT.pdf
- Description:
- IC LED DRIVER CTRLR PWM 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,233
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Product details
Overview
TPS92692PWPT from Texas Instruments is a high-accuracy peak current mode LED controller for boost/buck LED driver topologies, supporting 4.5 V–65 V input, ±4% LED current accuracy over –40°C to 150°C, spread-spectrum EMI reduction, and integrated P-channel gate driver (PDRV) for series FET dimming. It enables automotive exterior lighting with fault reporting via IMON and open-drain FLT.
For engineers reviewing the TPS92692PWPT datasheet, TPS92692PWPT pinout, TPS92692PWPT application, or TPS92692PWPT equivalent, key selection criteria include its 20-pin HTSSOP package with PowerPAD™, dual dimming (analog IADJ + PWM DIM/PWM), rail-to-rail current sense amplifier (CSP/CSN), and automotive-grade thermal robustness up to 150°C junction temperature.
Technical Context
The TPS92692PWPT implements fixed-frequency peak current mode control with adaptive slope compensation (SLOPE pin) and internal triangle-wave PWM generator (RAMP pin). Its rail-to-rail current sense amplifier delivers 14× gain for precise LED current monitoring, while spread-spectrum modulation (DM pin) reduces EMI by dithering switching frequency between 80 kHz and 800 kHz.
It integrates dual regulation paths: a 7.5 V LDO (VCC) powering gate drivers and logic, and a 5 V reference (VREF) for analog circuitry. Fault protection includes cycle-by-cycle current limit (IS), output over/undervoltage detection (OV), thermal shutdown (175°C), and auto-restart hiccup mode enabled via FLT-to-SS connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 65 V - supports wide automotive battery range including cold-crank (4.5 V) and load-dump transients. |
| LED Current Accuracy | Better than ±4% over –40°C to 150°C - enables stable brightness in under-hood and headlamp environments without recalibration. |
| Switching Frequency | 80 kHz to 800 kHz (RT-programmable) - allows optimization of magnetics size vs. EMI performance. |
| Dimming Range | Analog: >15:1 linear (via IADJ); PWM: >1000:1 (via DIM/PWM) - supports both smooth analog fade and high-contrast strobing. |
| Current Sense Threshold | 170.7 mV (typ) at VIADJ = 2.42 V - sets LED current with 100 mΩ sense resistor yielding 1.707 A full-scale. |
| Package Thermal Resistance | RθJA = 40.8°C/W (HTSSOP-20 with PowerPAD™) - requires PCB thermal vias to ground plane for sustained 150°C operation. |
| Fault Reporting | IMON = 14 × ILED × RCS (voltage output); FLT = open-drain flag for OV/UVP/OCP - enables real-time diagnostics without external ADC. |
Pinout & Package
TPS92692PWPT is housed in a 20-pin HTSSOP (PWP) package with exposed thermal pad (PowerPAD™), measuring 5.10 mm × 6.60 mm. The thermal pad must be soldered to PCB ground plane using ≥4 thermal vias for reliable thermal performance at 150°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Main supply input | Accepts 4.5–65 V; powers internal regulators; requires RC low-pass filter (10 Ω + 10 nF) near pin. |
| VREF (2) | 5 V reference output | Stable bias for analog circuitry; decouple with 2.2–4.7 µF ceramic capacitor to GND. |
| FLT (3) | Open-drain fault indicator | Asserts low on OVP/UVP/OCP; connect pull-up to VREF; enables hiccup mode when tied to SS. |
| SS (4) | Soft-start timing | Capacitor-to-GND sets startup ramp; shorting to GND disables switching. |
| DM (5) | Spread-spectrum modulator | Capacitor-to-GND sets triangle wave frequency (0.1–12 kHz); tie to GND to disable modulation. |
| RT (6) | Oscillator frequency set | Resistor-to-GND programs fSW (80–800 kHz); supports external clock sync via AC coupling. |
| COMP (7) | Error amplifier output | Transconductance node (121 µA/V); connect Type II/III compensation network for loop stability. |
| IMON (8) | LED current monitor | Voltage output = 14 × ILED × RCS; bypass with 1 nF ceramic cap; used for real-time current readback. |
| IADJ (9) | Analog dimming reference | High-impedance input (10.5 nA bias); 0.14–2.25 V range sets V(CSP-CSN) threshold; enables binning compensation. |
| DIM/PWM (10) | Dimming command interface | Accepts 1–3 V analog input for internal PWM generation or direct PWM signal; Schmitt-triggered (1.8–2.2 V thresholds). |
| RAMP (11) | PWM generator timing | Capacitor-to-GND sets internal triangle wave frequency (100–2000 Hz); 249 kΩ-to-GND disables generator. |
| PDRV (12) | P-channel FET gate driver | Drives external P-MOSFET for series dimming/fault disconnect; 7.4 V on-state, 14 V off-state at VCSP = 14 V. |
| CSP (14) | Current sense + input | Connects to high-side of RCS; common-mode range 6.5–60 V; 107 µA bias current. |
| CSN (13) | Current sense – input | Connects to low-side of RCS; rail-to-rail input; 110 µA bias current; differential pair with CSP. |
| OV (15) | Output voltage monitor | Resistor divider input for OVP (1.228 V threshold) and UVP (100 mV threshold); blanking period = 4 µs. |
| SLOPE (16) | Slope compensation adjust | Resistor-to-GND sets ramp amplitude (72–410 mV) to prevent subharmonic oscillation in DCM. |
| GND (17) | Analog & power ground | Single-point return for all signals; must connect to thermal pad via multiple vias. |
| IS (18) | Switch current sense | Monitors main MOSFET current; 250 mV internal threshold; 88–158 ns leading-edge blanking. |
| GATE (19) | N-channel MOSFET driver | Drives external N-MOSFET switch; RGH = 5.4 Ω, RGL = 4.3 Ω; supports 500 mA pulsed current. |
| VCC (20) | 7.5 V bias supply | Internal LDO output; powers gate drivers and logic; UVLO thresholds: 4.9 V (rising), 4.1 V (falling). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail current sense amplifier | Enables accurate LED current measurement across full input/output voltage range (6.5–60 V common-mode), critical for buck-boost LED strings. |
| Integrated P-channel gate driver (PDRV) | Directly controls external P-MOSFET for series dimming and LED string disconnect during fault, eliminating need for external level shifter. |
| Spread-spectrum frequency modulation | Reduces peak EMI by ±12% frequency dithering (DM pin controlled), easing compliance with CISPR 25 Class 5 in automotive lighting. |
| Comprehensive fault protection | Detects and reports LED overcurrent (IS), output over/undervoltage (OV), thermal shutdown (175°C), and provides auto-restart hiccup mode. |
| Two independent dimming interfaces | IADJ enables analog dimming with >15:1 linear range; DIM/PWM supports >1000:1 PWM dimming - supports both legacy and advanced lighting control schemes. |
Applications
| Automotive Headlamps | Driver Monitoring Systems (DMS) |
|---|---|
Use Scenario: High-brightness LED arrays in adaptive front-lighting systems (AFS) requiring precise current regulation and fast fault response. IC Role / Device Role / Timing Role: Peak current mode LED controller managing boost converter topology with PDRV-controlled series dimming for dynamic beam shaping. Use Value: ±4% current accuracy ensures consistent lumen output across –40°C to 150°C ambient; IMON and FLT enable ASIL-B-compliant diagnostics per ISO 26262. |
Use Scenario: IR LED illumination for in-cabin camera-based driver attention monitoring, requiring flicker-free, thermally stable illumination. IC Role / Device Role / Timing Role: Constant-current LED driver with analog dimming (IADJ) for fine-grained brightness control and thermal derating. Use Value: 15:1 analog dimming range enables seamless adaptation to varying cabin lighting conditions; 150°C junction rating supports placement near heat-generating SoCs. |
| Exit Signs & Emergency Lighting | Industrial LED General Lighting |
Use Scenario: UL 924-compliant emergency egress lighting with battery backup, requiring wide-input operation and long-term reliability. IC Role / Device Role / Timing Role: Buck-boost LED controller accepting 12–48 V DC input (battery or PoE), delivering constant current with OV/UVP protection. Use Value: 4.5–65 V input range covers 12 V, 24 V, and 48 V battery systems; thermal shutdown (175°C) prevents failure during extended battery discharge. |
Use Scenario: High-efficiency commercial LED troffers and high-bay fixtures operating from 24–48 V DC distributed power rails. IC Role / Device Role / Timing Role: Primary LED current controller implementing spread-spectrum switching (DM) to meet FCC Part 15 Class B conducted/radiated EMI limits. Use Value: Integrated EMI reduction eliminates need for external filters; RθJA = 40.8°C/W enables compact heatsink design in enclosed luminaires. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3410XMM/NOPB | Fixed 1.6 MHz switching frequency; no spread spectrum; no PDRV output; ±6% current accuracy over temperature. | Limited to lower-power (<1 A) boost-only designs; lacks automotive qualification and comprehensive fault reporting. | Select for cost-sensitive, non-automotive boost LED drivers where EMI filtering is handled externally. |
| TPS92515HV-Q1 | Integrated 2-A N-channel MOSFET; no PDRV; 1.5% typical current accuracy; supports 65-V input but no spread spectrum. | Higher integration reduces BOM count but limits topology flexibility; no series-FET dimming capability. | Choose when board space is constrained and series dimming is not required; verify thermal margin for 2-A internal FET. |
Compared with LM3410XMM/NOPB and TPS92515HV-Q1, the TPS92692PWPT uniquely combines spread-spectrum EMI reduction, P-channel gate driver for series dimming/fault isolation, and ±4% accuracy over full automotive temperature range - making it optimal for safety-critical, thermally demanding LED lighting systems.
Availability
TPS92692PWPT is available at Aetrix Electronics and suitable for automotive exterior lighting, driver monitoring systems (DMS), and industrial LED general lighting requiring stable component supply, AEC-Q100 Grade 1 qualification, and long-term production continuity.
Supply support for TPS92692PWPT 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 deep expertise in automotive and industrial power conversion solutions.
The TPS92692PWPT belongs to TI's high-accuracy LED controller product line, designed specifically for automotive-grade exterior lighting and safety-critical illumination systems requiring robust fault handling and wide-temperature operation.
FAQ
What is the maximum junction temperature rating for the TPS92692PWPT?
The TPS92692PWPT has a maximum junction temperature rating of 150°C, with thermal shutdown activated at 175°C and 25°C hysteresis. This rating is validated per AEC-Q100 Grade 1 requirements, enabling reliable operation in under-hood automotive environments and enclosed LED luminaires where ambient temperatures exceed 125°C.
How does the TPS92692PWPT implement analog dimming?
The TPS92692PWPT implements analog dimming through the IADJ pin, which accepts an external voltage from 0.14 V to 2.25 V to set the LED current sense threshold (VCSP–CSN). At 2.42 V IADJ, the threshold is 170.7 mV; scaling IADJ linearly adjusts this threshold, achieving >15:1 contrast ratio with high-impedance input (10.5 nA bias current) for minimal loading.
Can the TPS92692PWPT drive both N-channel and P-channel MOSFETs simultaneously?
Yes - the TPS92692PWPT drives an external N-channel MOSFET via the GATE pin for primary switching and a P-channel MOSFET via the PDRV pin for series dimming or fault disconnect. GATE supports 500 mA pulsed current; PDRV delivers 50 mA sink current with 7.4 V on-state voltage at VCSP = 14 V, enabling coordinated control of both FETs.
What protection features does the TPS92692PWPT provide for LED string faults?
The TPS92692PWPT provides cycle-by-cycle overcurrent protection (IS pin), output overvoltage/undervoltage detection (OV pin), thermal shutdown (175°C), and open-drain FLT flag reporting all three faults. Connecting FLT to SS enables auto-restart (hiccup) mode, while IMON provides continuous analog current monitoring for cable break or LED short detection.
Is the TPS92692PWPT pin-compatible with the TPS92692-Q1?
Yes - the TPS92692PWPT and TPS92692-Q1 share identical pinout, package (HTSSOP-20 PWP), and electrical specifications. The TPS92692-Q1 adds AEC-Q100 Grade 1 qualification and enhanced ESD ratings (±750 V CDM on pins 1/10/11/20), while the TPS92692PWPT is the commercial-grade variant with identical functional behavior and layout compatibility.
TPS92692PWPT 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
TPS92692PWPT FAQ
1.How can I place an order for TPS92692PWPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92692PWPT 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 TPS92692PWPT reliable?
The price and inventory of TPS92692PWPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92692PWPT is usually 5 days.
3.What payment methods are accepted for TPS92692PWPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92692PWPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92692PWPT?
TPS92692PWPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92692PWPT 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 TPS92692PWPT?
For technical support, including TPS92692PWPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92692PWPT requirements.
6.How does Aetrix verify that TPS92692PWPT is sourced from the original manufacturer or authorized distributors?
All TPS92692PWPT 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 TPS92692PWPT meets industry standards.
7.What is the process for return or replacement of TPS92692PWPT?
All TPS92692PWPT units undergo pre-shipment inspection (PSI). If there is an issue with TPS92692PWPT, 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 TPS92692PWPT part is unused and in its original packaging.
Return procedure for TPS92692PWPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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