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Texas Instruments TPS92690PWP/NOPB
- Part No.:
- TPS92690PWP/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS92690PWP/NOPB.pdf
- Description:
- IC LED DRIVER CTRLR PWM 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,796
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Product details
Overview
TPS92690PWP/NOPB from Texas Instruments is an N-channel MOSFET controller for dimmable LED drivers using low-side current sensing, supporting boost/SEPIC/flyback/Cuk topologies. It operates from 4.5 V to 75 V input, delivers adjustable output current via 50–500 mV sense threshold, features 2-Ω gate drive, and includes PWM dimming, OVP, UVLO, and thermal shutdown - deployed in automotive headlamp and industrial high-bay LED lighting systems.
For engineers reviewing the TPS92690PWP/NOPB datasheet, TPS92690PWP/NOPB pinout, TPS92690PWP/NOPB application, or TPS92690PWP/NOPB equivalent, key selection considerations include low-side current sense architecture, programmable switching frequency up to 2 MHz, analog dimming via IADJ pin, cycle-by-cycle current limiting, and HTSSOP-16 exposed-pad thermal performance.
Technical Context
The TPS92690PWP/NOPB implements peak current-mode control with slope compensation to ensure stability across wide duty cycles and input/output variations. Its error amplifier regulates COMP voltage to maintain precise average LED current by comparing IADJ-derived reference (VREF/10) against CSP-sensed voltage, while IS pin monitors either external sense resistor or MOSFET RDS(on).
It integrates a 6.9-V LDO VCC regulator with 4.1-V UVLO, programmable oscillator (RT pin), external synchronization (SYNC pin), soft-start/shutdown (SS/SD pin), and dual-function nDIM for PWM dimming. Thermal shutdown activates at 175°C with 25°C hysteresis, and overvoltage protection triggers at 1.282 V on OVP pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 75 V - supports wide-input LED drivers including 12 V, 24 V, and 48 V industrial and automotive supplies. |
| Current Sense Threshold | 50 mV to 500 mV - enables high-efficiency low-side sensing with configurable accuracy vs. power loss tradeoff. |
| Switching Frequency | Up to 2 MHz - set via RT resistor or external SYNC signal; higher frequencies reduce magnetics size but increase AC losses. |
| GATE Drive Strength | 2.4 Ω sourcing / 1 Ω sinking - drives N-channel MOSFETs with fast turn-on/turn-off, minimizing switching losses. |
| VREF Output | 2.45 V ±20 mV - precision internal reference used to set IADJ and ILIM thresholds via resistor dividers. |
| OVP Threshold | 1.282 V rising edge - protects LED string and output capacitor from overvoltage failure in boost/flyback configurations. |
| Thermal Shutdown | 175°C with 25°C hysteresis - prevents permanent damage during overload or poor heatsinking conditions. |
Pinout & Package
TPS92690PWP/NOPB is housed in a 16-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal pad for enhanced thermal dissipation in high-power LED driver PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| nDIM | PWM dimming input | Accepts external PWM signal to modulate GATE output duty cycle; also serves as UVLO input when tied to VIN divider. |
| OVP | Overvoltage protection input | Monitors output voltage via resistor divider; triggers shutdown if exceeds 1.282 V threshold. |
| RT | Oscillator timing | Connects to AGND via resistor to set base switching frequency (e.g., 100 kΩ → 418 kHz typical). |
| SYNC | External clock sync input | Falling-edge-triggered; overrides internal oscillator when external frequency > RT-set frequency. |
| VIN | Main input supply | High-voltage input (4.5–75 V); bypassed with 100-nF ceramic capacitor near device for noise suppression. |
| VCC | Bias supply output | 6.9-V regulated LDO output; requires 2.2-µF ceramic capacitor for stable gate drive and internal circuitry. |
| IS | Current sense input | Connects to MOSFET drain or sense resistor; enables RDS(on) or discrete sensing with cycle-by-cycle limiting. |
| GATE | MOSFET gate driver output | Drives external N-channel FET; 2.4 Ω pull-up / 1 Ω pull-down ensures fast switching transitions. |
| SS/SD | Soft-start & shutdown | Capacitor sets soft-start time; pulled below 86 mV to enter <45 µA shutdown mode. |
| COMP | Error amplifier output | Connects to RC network for loop compensation; controls duty cycle based on CSP–IADJ comparison. |
| AGND | Analog ground | Reference for error amplifier, VREF, and analog pins; must be connected to PGND via thermal pad. |
| ILIM | Current limit threshold | Sets peak current limit voltage (e.g., 0.2 V → 200 mV) via resistor divider from VREF. |
| PGND | Power ground | High-current return path for MOSFET and sense resistor; tied to AGND through thermal pad. |
| CSP | Current sense positive | Connects to positive side of LED-string sense resistor; referenced to AGND for accurate current regulation. |
| IADJ | Analog dimming reference | Sets LED current target as VREF/10 (e.g., 2.45 V → 245 mV); accepts 0–5 V for analog dimming or thermal foldback. |
| VREF | Precision reference output | 2.45 V ±20 mV source for setting IADJ and ILIM thresholds; bypassed with 100-nF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Low-side current sensing | Enables ground-referenced LED strings and simplifies PCB layout versus high-side sensing. |
| Programmable soft-start | SS/SD pin charges external capacitor to ramp COMP voltage, preventing inrush current and output overshoot. |
| External synchronization | SYNC pin allows multi-phase or noise-sensitive systems to lock switching to external clock, reducing EMI. |
| Adjustable current limit | ILIM pin accepts resistor-divided VREF to set precise peak current threshold independent of IADJ setting. |
| Thermal shutdown with hysteresis | 175°C trip + 25°C hysteresis avoids thermal cycling; resets only after junction cools to 150°C. |
| PWM + analog dimming support | nDIM pin accepts PWM signals; IADJ pin accepts DC voltage for smooth analog dimming or thermal derating. |
Applications
| Automotive Headlamp Drivers | Industrial High-Bay Lighting |
|---|---|
Use Scenario: Constant-current LED driver for adaptive front-lighting systems (AFS) requiring 350–1000 mA output with thermal foldback. IC Role / Device Role / Timing Role: N-channel controller regulating boost converter output current via low-side sense; manages PWM dimming and OVP for safety-critical illumination. Use Value: Enables precise current regulation across 9–16 V battery range with built-in UVLO, OVP, and thermal shutdown for ASIL-B compliance support. | Use Scenario: 48 V input LED driver powering 12–24 V LED strings in warehouse lighting with analog dimming interface. IC Role / Device Role / Timing Role: Controller for SEPIC topology delivering stable current under wide line/load transients; uses IADJ for 0–10 V dimming integration. Use Value: Delivers >90% efficiency at 500 mA with programmable frequency (400–1000 kHz) to avoid audible noise in large indoor spaces. |
| UV-C Disinfection Systems | Streetlight LED Drivers |
Use Scenario: High-efficiency driver for pulsed UV-C LEDs requiring precise current control and thermal derating above 60°C ambient. IC Role / Device Role / Timing Role: Flyback controller with cycle-by-cycle current limit and thermal shutdown; IADJ pin configured for temperature-based foldback. Use Value: Maintains LED lifetime by reducing current linearly above 60°C using external thermistor on IADJ, without external microcontroller. | Use Scenario: Outdoor LED streetlight operating from 120–305 VAC via PFC front-end, driving 36 V, 700 mA LED string. IC Role / Device Role / Timing Role: Boost controller with OVP and UVLO protection; RT pin set to 350 kHz to balance efficiency and EMI filter size. Use Value: Supports long-life operation with 125°C max junction rating and exposed thermal pad enabling >3 W dissipation in compact housing. |
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 frequency, no external sync, no IADJ analog dimming, lower max input (42 V), no OVP pin. | Limited to low-voltage (<42 V) boost LED drivers without overvoltage protection or thermal foldback capability. | Select when cost-sensitive, low-input-voltage, fixed-frequency designs prioritize simplicity over flexibility. |
| TPS92692PWPR | Pin-compatible upgrade with improved VREF accuracy (±0.5%), lower COMP offset (±0.5 mV), and extended temperature range (–40°C to 150°C). | Same topology support and pinout; better suited for high-reliability automotive or industrial applications requiring tighter regulation. | Choose for new designs needing enhanced accuracy and extended thermal margin; not drop-in for legacy TPS92690 layouts due to different thermal pad design. |
Compared with LM3410XMM/NOPB, TPS92690PWP/NOPB offers wider input range, OVP, and analog dimming but requires more external components; versus TPS92692PWPR, it lacks tighter VREF tolerance and extended temp rating but remains suitable for cost-optimized industrial LED drivers.
Availability
TPS92690PWP/NOPB is available at Aetrix Electronics and suitable for automotive headlamp drivers, industrial high-bay lighting, UV-C disinfection systems, and outdoor streetlight LED drivers requiring stable component supply across production lifecycles.
Supply support for TPS92690PWP/NOPB 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs and LED driver solutions.
TPS92690PWP/NOPB belongs to TI's high-voltage LED controller product line, designed specifically for constant-current LED drivers using boost, SEPIC, flyback, and Cuk topologies in automotive and industrial lighting.
FAQ
What is the maximum input voltage supported by the TPS92690PWP/NOPB?
The TPS92690PWP/NOPB supports an absolute maximum input voltage of 76 V on the VIN pin, with recommended operation from 4.5 V to 75 V. This wide range enables use in 12 V, 24 V, and 48 V industrial systems as well as automotive battery-supplied LED drivers where load dump transients may occur. Exceeding 76 V risks permanent damage per Absolute Maximum Ratings.
How does the TPS92690PWP/NOPB implement analog dimming?
The TPS92690PWP/NOPB implements analog dimming via the IADJ pin, which sets the LED current regulation point as VREF/10. Applying a DC voltage from 0 V to 5 V to IADJ adjusts the target current proportionally - e.g., 2.45 V yields 245 mV across the sense resistor. Below ~0.2 V, pulse skipping occurs to maintain regulation, making it suitable for thermal foldback or low-level dimming when combined with appropriate loop compensation.
Can the TPS92690PWP/NOPB be synchronized to an external clock?
Yes, the TPS92690PWP/NOPB can be synchronized to an external clock using the SYNC pin. A falling edge on SYNC triggers a new GATE on-time, overriding the internal oscillator when the external frequency exceeds the RT-set base frequency. The SYNC signal must be 2.5–5 V amplitude; this feature reduces EMI in multi-converter systems and enables zero-voltage switching in quasi-resonant topologies.
What is the purpose of the SS/SD pin on the TPS92690PWP/NOPB?
The SS/SD pin on the TPS92690PWP/NOPB serves dual functions: soft-start and shutdown. Connecting a capacitor from SS/SD to AGND sets soft-start time by controlling COMP voltage ramp rate; pulling SS/SD below 86 mV (e.g., with open-drain transistor) places the device in low-power shutdown with quiescent current <65 µA. During shutdown, GATE is disabled and internal regulators are powered down.
Does the TPS92690PWP/NOPB support high-side current sensing?
No, the TPS92690PWP/NOPB supports only low-side current sensing via the CSP and IS pins, which are referenced to AGND/PGND. Its error amplifier and current sense architecture require the LED string to be connected to ground, making it incompatible with high-side sensing or floating buck/buck-boost topologies. For high-side sensing, TI recommends alternatives like the TPS92515HV.
TPS92690PWP/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Flyback, SEPIC, Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 75V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 350kHz ~ 490kHz
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS92690PWP/NOPB FAQ
1.How can I place an order for TPS92690PWP/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92690PWP/NOPB 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 TPS92690PWP/NOPB reliable?
The price and inventory of TPS92690PWP/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92690PWP/NOPB is usually 5 days.
3.What payment methods are accepted for TPS92690PWP/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92690PWP/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92690PWP/NOPB?
TPS92690PWP/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92690PWP/NOPB 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 TPS92690PWP/NOPB?
For technical support, including TPS92690PWP/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92690PWP/NOPB requirements.
6.How does Aetrix verify that TPS92690PWP/NOPB is sourced from the original manufacturer or authorized distributors?
All TPS92690PWP/NOPB 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 TPS92690PWP/NOPB meets industry standards.
7.What is the process for return or replacement of TPS92690PWP/NOPB?
All TPS92690PWP/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with TPS92690PWP/NOPB, 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 TPS92690PWP/NOPB part is unused and in its original packaging.
Return procedure for TPS92690PWP/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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