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Texas Instruments TPS92690PWPR/NOPB
- Part No.:
- TPS92690PWPR/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS92690PWPR/NOPB.pdf
- Description:
- IC LED DRIVER CTRLR PWM 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
TPS92690PWPR/NOPB from Texas Instruments is a high-voltage, low-side N-channel MOSFET controller for constant-current LED drivers using boost, SEPIC, flyback, or Cuk topologies. It operates from 4.5 V to 75 V input, supports adjustable current sense threshold (50–500 mV), integrates a 2-Ω gate driver, and delivers up to 2 MHz switching frequency with external RT resistor programming. It is used in automotive exterior lighting and industrial LED signage requiring precise analog/PWM dimming and overvoltage protection.
For engineers reviewing the TPS92690PWPR/NOPB datasheet, TPS92690PWPR/NOPB pinout, TPS92690PWPR/NOPB application, or TPS92690PWPR/NOPB equivalent, key selection considerations include its low-side current sensing architecture, programmable soft-start via SS/SD pin, cycle-by-cycle current limiting at IS/ILIM pins, and compatibility with thermal foldback via IADJ voltage scaling.
Technical Context
The TPS92690PWPR/NOPB implements peak current-mode control with slope compensation to ensure stability across wide input/output ranges. Its error amplifier regulates average LED current by comparing CSP-sensed voltage against a reference derived from IADJ/10, enabling analog dimming and thermal foldback.
It features dual current-limit paths: primary regulation via IS-to-COMP comparison and redundant cycle-by-cycle protection triggered when IS exceeds ILIM-set threshold. The device includes a 6.9-V internal LDO for VCC bias, UVLO (4.1 V rising), OVP (1.24 V threshold), and thermal shutdown at 175 °C with 25 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 75 V - supports wide-range DC inputs including 12 V, 24 V, and 48 V industrial and automotive rails. |
| Current Sense Threshold | 50 mV to 500 mV - sets LED current regulation point; lower values improve efficiency, higher values improve accuracy. |
| Switching Frequency | Up to 2 MHz - set by RT resistor (e.g., 100 kΩ → 418 kHz typical); enables compact magnetics but requires careful layout above 1 MHz. |
| GATE Driver Strength | 2.4 Ω sourcing / 1 Ω sinking - drives N-FET gates directly; supports fast turn-on/turn-off for high-efficiency operation. |
| VREF Output | 2.45 V ±20 mV - precision internal reference used to set IADJ and ILIM thresholds via resistor dividers. |
| OVP Threshold | 1.24 V at OVP pin - corresponds to output overvoltage protection; configured via external resistor divider from VOUT. |
| Thermal Shutdown | 175 °C with 25 °C hysteresis - protects IC during overload or poor heatsinking; resumes operation after cooldown. |
Pinout & Package
TPS92690PWPR/NOPB is housed in a 16-pin HTSSOP (PWP) package with exposed thermal pad (5.00 mm × 4.40 mm), optimized for power dissipation in LED driver PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| nDIM | PWM dimming input | Accepts external PWM signal (0–5 V) to modulate GATE on-time; also serves as UVLO enable/disable control. |
| OVP | Overvoltage protection input | Monitors output voltage via resistor divider; triggers shutdown if VOUT exceeds programmed threshold. |
| RT | Oscillator timing | Connects to AGND via resistor to set base switching frequency; supports synchronization via SYNC pin. |
| SYNC | External clock input | Falling-edge-triggered; overrides internal oscillator when external frequency > RT-set frequency. |
| IS | Current sense input | Connects to source of sense resistor or drain of main N-FET; enables cycle-by-cycle current limiting. |
| IADJ | Analog dimming reference | Sets LED current regulation point (ILED = VIADJ/10/RCS); supports 0–5 V analog dimming and thermal foldback. |
| VREF | Precision reference output | 2.45 V ±20 mV reference used to configure IADJ and ILIM thresholds with high-impedance resistor dividers. |
| GATE | N-FET gate driver output | Drives external N-channel MOSFET gate with 2.4 Ω pull-up / 1 Ω pull-down; peak current ±1.1 A. |
| VIN | Main supply input | High-voltage input (4.5–75 V); bypassed with 100 nF ceramic capacitor close to pin for noise immunity. |
| VCC | Bias supply output | 6.9 V LDO output; powers internal circuitry; bypassed with 2.2 µF X7R ceramic capacitor. |
| AGND | Analog ground | Reference for error amplifier, COMP, and precision circuits; connected to PGND via thermal pad. |
| PGND | Power ground | Return path for high-current switching nodes; tied to AGND through exposed thermal pad. |
| SS/SD | Soft-start/shutdown control | Pulled below 86 mV to enter shutdown (IQ ≈ 45 µA); capacitor to AGND sets soft-start ramp time. |
| COMP | Error amplifier output | Integrates loop compensation; connects to RC network to stabilize current regulation loop. |
| CSP | Current sense positive | Connects to positive side of LED-string sense resistor; referenced to AGND for accurate low-side sensing. |
| ILIM | Current limit threshold | Sets overcurrent trip point via resistor divider from VREF; triggers immediate GATE shutdown on violation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-side current sensing | Enables ground-referenced LED string layout, simplifying PCB routing and improving noise immunity vs high-side sensing. |
| Programmable soft-start | SS/SD pin charges external capacitor with 10 µA current source, preventing inrush current and output overshoot at startup. |
| External synchronization | SYNC pin accepts falling-edge clock signals up to 2 MHz, enabling EMI reduction via spread-spectrum or multi-phase coordination. |
| Adjustable analog dimming | IADJ pin accepts 0–5 V control voltage, allowing continuous LED current adjustment without PWM flicker down to ~1% ILED. |
| Integrated OVP and UVLO | Dual protection: OVP (1.24 V threshold) prevents LED overvoltage failure; UVLO (4.1 V rising) ensures stable start-up under weak input conditions. |
Applications
| Automotive Exterior Lighting | Industrial LED Signage |
|---|---|
|
Use Scenario: High-brightness LED headlamps and DRLs powered from 12 V or 24 V vehicle battery with load dump tolerance. IC Role / Device Role / Timing Role: N-FET controller implementing boost topology to regulate constant current into series-connected HBLEDs. Use Value: Enables precise analog dimming for adaptive driving beams and meets stringent thermal foldback requirements per AEC-Q100 Class 1. |
Use Scenario: Large-format outdoor LED displays requiring stable current regulation across wide ambient temperature range (−40°C to +85°C). IC Role / Device Role / Timing Role: Constant-current controller in SEPIC configuration to maintain uniform brightness despite input voltage sag during grid fluctuations. Use Value: Delivers <±2% current regulation over 4.5–75 V input and 12–60 V output, ensuring consistent luminance across display modules. |
| Architectural Lighting | UV-C Disinfection Systems |
|
Use Scenario: Tunable-white LED fixtures with independent warm/cool channel control in commercial buildings. IC Role / Device Role / Timing Role: Dual-channel controller (one per channel) using IADJ voltage scaling to adjust CCT while maintaining CRI. Use Value: Supports smooth 2700K–6500K color tuning via 0–5 V analog input, eliminating PWM-induced audible noise in quiet environments. |
Use Scenario: Pulsed UV-C LED arrays for surface disinfection, requiring precise current control and thermal derating. IC Role / Device Role / Timing Role: Flyback-based current regulator with thermal foldback activated via IADJ feedback from NTC sensor. Use Value: Automatically reduces LED drive current above 60°C to prevent UV LED degradation, extending lifetime beyond 10,000 hours. |
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 | Limited to 42 V VIN max; no OVP; fixed 1.6 MHz frequency; no IADJ analog dimming. | Suitable only for low-voltage (<36 V) boost LED drivers without overvoltage protection or thermal foldback. | Choose LM3410XMM/NOPB only for cost-sensitive, low-input-voltage designs where full TPS92690PWPR/NOPB feature set is unnecessary. |
| UCC28810DR | AC-input PFC+constant-current controller; requires rectified AC input; no low-side current sense; no SYNC pin. | Designed for offline AC-powered LED ballasts, not DC-input LED drivers like TPS92690PWPR/NOPB. | Select UCC28810DR only for universal AC-input LED drivers; TPS92690PWPR/NOPB remains preferred for DC-input systems with analog dimming needs. |
Compared with LM3410XMM/NOPB and UCC28810DR, the TPS92690PWPR/NOPB uniquely combines 75 V input capability, programmable analog dimming via IADJ, integrated OVP, and external synchronization-making it the only option among the three suitable for high-reliability DC-input LED drivers requiring thermal management and EMI control.
Availability
TPS92690PWPR/NOPB is available at Aetrix Electronics and suitable for automotive lighting, industrial signage, architectural lighting, and UV-C disinfection systems requiring stable component supply and long-term production continuity.
Supply support for TPS92690PWPR/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 leader specializing in analog, embedded processing, and power management technologies with over 90 years of innovation in high-reliability electronics.
The TPS92690PWPR/NOPB belongs to TI's high-voltage LED controller product line, engineered specifically for constant-current regulation in boost, SEPIC, flyback, and Cuk topologies with emphasis on thermal robustness and dimming flexibility.
FAQ
What is the maximum input voltage supported by the TPS92690PWPR/NOPB?
The TPS92690PWPR/NOPB supports an absolute maximum input voltage of 76 V on the VIN pin, with recommended operating range from 4.5 V to 75 V. This wide range allows direct use with 12 V, 24 V, and 48 V industrial and automotive supplies, including transient-tolerant designs with load-dump protection. Exceeding 76 V risks permanent damage per Absolute Maximum Ratings.
How does the TPS92690PWPR/NOPB implement analog dimming?
The TPS92690PWPR/NOPB implements analog dimming via the IADJ pin: LED current is regulated to VIADJ/10/RCS, where RCS is the sense resistor value. Applying 0–5 V to IADJ scales output current linearly from near-zero to full-scale. At low IADJ voltages, pulse-skipping occurs to maintain regulation, enabling smooth dimming down to ~1% without visible flicker when properly filtered.
Can the TPS92690PWPR/NOPB be synchronized to an external clock?
Yes, the TPS92690PWPR/NOPB supports external synchronization via the SYNC pin. A falling edge on SYNC triggers a new GATE on-time, overriding the internal oscillator when the external signal frequency exceeds the RT-set base frequency. SYNC accepts 2.5–5 V logic-level signals and enables EMI reduction or multi-phase coordination in systems with multiple TPS92690PWPR/NOPB controllers.
What is the purpose of the SS/SD pin on the TPS92690PWPR/NOPB?
The SS/SD pin on the TPS92690PWPR/NOPB serves dual functions: soft-start and shutdown. Pulling SS/SD below 86 mV places the device in low-power shutdown (IQ ≈ 45 µA). When released, a 10 µA internal current source charges an external capacitor to ramp COMP voltage, controlling startup slew rate and preventing output overshoot or inrush current in the LED string.
Does the TPS92690PWPR/NOPB support overvoltage protection?
Yes, the TPS92690PWPR/NOPB includes dedicated overvoltage protection (OVP) via the OVP pin. A resistor divider from VOUT sets the trip threshold at 1.24 V on the OVP pin, corresponding to user-defined output voltage limits. Upon detection, the controller disables GATE output and enters fault state until reset via SS/SD or power cycle, protecting LEDs from catastrophic overvoltage failure.
TPS92690PWPR/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
TPS92690PWPR/NOPB FAQ
1.How can I place an order for TPS92690PWPR/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92690PWPR/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 TPS92690PWPR/NOPB reliable?
The price and inventory of TPS92690PWPR/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92690PWPR/NOPB is usually 5 days.
3.What payment methods are accepted for TPS92690PWPR/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92690PWPR/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92690PWPR/NOPB?
TPS92690PWPR/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92690PWPR/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 TPS92690PWPR/NOPB?
For technical support, including TPS92690PWPR/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92690PWPR/NOPB requirements.
6.How does Aetrix verify that TPS92690PWPR/NOPB is sourced from the original manufacturer or authorized distributors?
All TPS92690PWPR/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 TPS92690PWPR/NOPB meets industry standards.
7.What is the process for return or replacement of TPS92690PWPR/NOPB?
All TPS92690PWPR/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with TPS92690PWPR/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 TPS92690PWPR/NOPB part is unused and in its original packaging.
Return procedure for TPS92690PWPR/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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