My Inquiry
My Account
Texas Instruments TPS92641PWPR/NOPB
- Part No.:
- TPS92641PWPR/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS92641PWPR/NOPB.pdf
- Description:
- IC LED DRIVER CTRLR PWM 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,871
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS92641PWPR/NOPB from Texas Instruments is a high-voltage synchronous buck LED controller with shunt-FET PWM dimming capability, operating from 7 V to 85 V input, supporting up to 5 A LED current, featuring 3 V ±2% precision reference, 2-Ω/1-A peak gate drivers, and 20,000:1 shunt FET PWM dimming ratio for automotive and architectural LED lighting.
For engineers reviewing the TPS92641PWPR/NOPB datasheet, TPS92641PWPR/NOPB pinout, TPS92641PWPR/NOPB application, or TPS92641PWPR/NOPB equivalent, this page delivers verified functional specifications, validated HTSSOP-16 package mapping, confirmed shunt-dimming driver timing (tSDIM-RIS = 68–100 ns), real-world thermal performance (RθJA = 38.7 °C/W), and direct alternative part comparisons - all extracted from TI's SNVS902A datasheet and official product documentation.
Technical Context
The TPS92641PWPR/NOPB implements valley-current-mode control with controlled-on-time architecture, eliminating need for slope compensation while maintaining near-constant switching frequency across 7–85 V input and wide output voltage ranges. Its dual-function UDIM pin serves both as programmable UVLO input (1.276 V threshold, 21 µA hysteresis current) and PWM dimming command interface.
It integrates dedicated SDRV output (5.6–30 Ω sourcing resistance) and SDIM input (1.29–1.74 V rising threshold, 0.5 V falling threshold) exclusively for shunt-FET dimming - a feature absent in TPS92640 - enabling true zero-current analog dimming via IADJ-controlled error amplifier with ±600 µV offset voltage and auto-zero calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 7 V to 85 V - supports wide-input LED systems including 12 V, 24 V, and 48 V automotive and industrial rails without external pre-regulation. |
| Shunt PWM Dimming Ratio | 20,000:1 - enables ultra-fine brightness control in high-end architectural and automotive exterior lighting where deep dimming is critical. |
| VREF Accuracy | 3.00 V ±2% - provides stable reference for precision current-sense threshold scaling and microcontroller bias supply. |
| Gate Drive Strength | 2 Ω sourcing / 1.1–4.5 Ω sinking - drives high-side and low-side NFETs with fast edge rates while allowing series resistor tuning for EMI mitigation. |
| SDRV Timing Delay | tSDIM-RIS = 68–100 ns - ensures tight synchronization between PWM command and shunt-FET turn-on, minimizing dimming jitter and ghosting. |
| Thermal Resistance | RθJA = 38.7 °C/W (HTSSOP-16) - enables 1.5 W continuous dissipation at 85°C ambient with standard PCB copper area and 6–9 DAP vias. |
| UVLO Threshold | UDIM start-up = 1.276 V ±66 mV - allows precise, resistor-programmable input undervoltage lockout independent of dimming function. |
Pinout & Package
TPS92641PWPR/NOPB is housed in a 16-pin HTSSOP (PWP) package measuring 4.40 mm × 5.00 mm with exposed thermal pad (DAP). The DAP requires 6–9 vias to internal GND plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | High-voltage input rail connection (7–85 V); bypassed with 1-µF ceramic capacitor directly at pin. |
| RON | Frequency Set | Connects external resistor to VIN to program switching frequency; internal pulldown 35–120 Ω enables default operation if left open. |
| UDIM | UVLO / PWM Input | Dual-function pin: 1.276 V UVLO threshold with 21 µA hysteresis current; also accepts PWM signal for main-FET dimming. |
| VOUT | Feedback Sense | Scaled-down output voltage feedback node; connects to resistor divider for overvoltage protection (2.85–3.25 V threshold). |
| VREF | Reference Output | 3.00 V ±2% precision voltage source; bypassed with 100-nF ceramic capacitor for stability and noise rejection. |
| IADJ | Analog Dimming Input | Adjusts LED current sense threshold (VCSREF = VIADJ/10); supports thermal foldback when connected to NTC network. |
| COMP | Loop Compensation | Output of error amplifier; connects to GND via ceramic capacitor (e.g., 0.47 µF) to set loop bandwidth and phase margin. |
| SDIM | Shunt PWM Input | Exclusive to TPS92641; 1.29–1.74 V rising threshold triggers shunt-FET dimming path with sub-100 ns propagation delay. |
| HG | High-Side Driver | Drives gate of external high-side NFET; 3.9–6 Ω sourcing resistance allows EMI-optimized series gate resistor placement. |
| SW | Switch Node | Connection to buck converter switch node; routes to BOOT capacitor and external high-side FET source. |
| BOOT | Bootstrap Supply | Provides boosted gate drive voltage for HG; requires 100-nF ceramic capacitor between BOOT and SW pins. |
| VCC | Bias Supply | Internally regulated ~8.5 V output; bypassed with 2.2-µF ceramic capacitor to support gate drivers and internal circuitry. |
| LG | Low-Side Driver | Drives gate of external low-side NFET; 1.5–6 Ω sourcing resistance enables slew-rate control for EMI reduction. |
| CS | Current Sense | Connects to positive terminal of LED string sense resistor; regulates VCS to VIADJ/10 with ±600 µV offset. |
| GND | System Ground | Primary ground reference; must be tied to DAP thermal pad via multiple vias for thermal and noise integrity. |
| SDRV | Shunt Driver Output | Drives gate of external shunt NFET for high-resolution PWM dimming; 5.6–30 Ω sourcing resistance supports fast turn-on. |
Key Features
| Feature | Design Value |
|---|---|
| Shunt-FET PWM Dimming Path | Integrated SDRV output and SDIM input enable 20,000:1 dimming ratio without external logic, reducing BOM count and layout complexity. |
| Auto-Zero Error Amplifier | ±600 µV input offset voltage maintained across temperature via chopping scheme - ensures accurate LED current regulation down to true-zero. |
| Programmable UVLO with Hysteresis | UDIM pin provides resistor-configurable turn-on threshold (1.276 V) and hysteresis current (21 µA), decoupling startup behavior from dimming signals. |
| Valley Current Control | Eliminates need for slope compensation and stabilizes loop response across full duty cycle range - simplifies compensation design and improves transient immunity. |
| High-Voltage Start-Up Regulator | VCC regulator delivers 8.5 V ±0.64 V at 63 mA limit over 7–85 V input - powers internal circuitry and gate drivers without auxiliary supply. |
Applications
| Automotive Headlamp Drivers | Architectural Tunable White Lighting |
|---|---|
Use Scenario: High-brightness LED headlamps requiring adaptive beam shaping and dynamic dimming under 12 V/24 V battery conditions with cold-cranking tolerance. IC Role / Device Role / Timing Role: Synchronous buck controller regulating constant LED current up to 5 A while executing shunt-FET PWM dimming at >1 kHz for flicker-free modulation. Use Value: Enables 20,000:1 dimming depth and true-zero current capability - critical for glare-free adaptive driving beam (ADB) systems meeting UNECE R149. |
Use Scenario: Multi-channel tunable white luminaires using separate warm/cool LED strings, requiring independent analog dimming and synchronized PWM control. IC Role / Device Role / Timing Role: Dual-role controller managing both main-FET buck regulation and shunt-FET dimming per channel, with IADJ-adjustable current setpoints and VREF-biased microcontrollers. Use Value: Delivers 500:1 analog dimming linearity and 20,000:1 shunt PWM resolution - enabling smooth CCT transitions and seamless scene changes without visible stepping. |
| Industrial Machine Vision Lighting | Commercial Exterior Signage |
Use Scenario: High-intensity strobed LED arrays used in automated optical inspection (AOI), demanding precise current regulation and sub-microsecond dimming latency. IC Role / Device Role / Timing Role: Fast-response buck controller with tSDIM-RIS ≤100 ns and tON-MIN = 235 ns - synchronizing LED flash timing to camera trigger signals. Use Value: Guarantees consistent light intensity across varying input voltage (e.g., 24 V factory bus) and temperature, eliminating exposure drift in vision systems. |
Use Scenario: Outdoor LED signage exposed to wide ambient temperatures (−40°C to +85°C) and unregulated AC/DC supplies, requiring robust overvoltage and thermal protection. IC Role / Device Role / Timing Role: Primary LED current controller with integrated OVP (2.85–3.25 V threshold), thermal shutdown (165°C), and input UVLO - ensuring fail-safe operation in harsh environments. Use Value: Maintains RθJA = 38.7 °C/W and junction temp ≤125°C under full load - extending LED lifetime and reducing field failure rates in permanent installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS92640PWPR | Omits SDIM/SDRV pins and shunt-FET dimming functionality; identical pinout except 14-pin HTSSOP; same VIN, VREF, gate drive specs. | Not suitable for applications requiring >2500:1 PWM dimming or true-zero current; limited to main-FET dimming only. | Select TPS92640PWPR only when shunt dimming is unnecessary and board space allows 14-pin footprint reduction. |
| LM3410XMYX/NOPB | Single-stage buck controller with integrated 1.5-A MOSFET; no shunt dimming; lower VIN max (42 V); fixed 1.23 V reference; no UDIM dual-function capability. | Targeted at low-power (<1 A), low-input-voltage LED modules; lacks programmable UVLO, thermal shutdown, and high-accuracy reference. | Choose LM3410XMYX/NOPB for cost-sensitive, compact designs below 42 V input and <1 A output where advanced dimming is not required. |
Compared with TPS92641PWPR/NOPB, TPS92640PWPR removes shunt-dimming capability but retains identical control architecture and thermal performance in smaller package, while LM3410XMYX/NOPB trades integration and voltage range for simplicity and lower BOM cost - making TPS92641PWPR/NOPB the sole choice for high-voltage, ultra-deep-dimming LED systems.
Availability
TPS92641PWPR/NOPB is available at Aetrix Electronics and suitable for automotive headlamp drivers, architectural tunable-white luminaires, industrial machine vision lighting, and commercial exterior signage requiring stable component supply across extended temperature and voltage ranges.
Supply support for TPS92641PWPR/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 decades of leadership in LED driver innovation and automotive-grade reliability.
The TPS9264x product line was designed specifically for high-voltage, precision-dimming LED current regulators in automotive, architectural, and industrial lighting - emphasizing valley-current control, ultra-wide dimming range, and robust thermal/overvoltage protection.
FAQ
What is the maximum input voltage supported by the TPS92641PWPR/NOPB?
The TPS92641PWPR/NOPB supports an absolute maximum input voltage of 90 V and operates continuously across 7 V to 85 V, enabling compatibility with 12 V, 24 V, and 48 V automotive and industrial power buses - including cold-crank transients up to 85 V sustained.
Does the TPS92641PWPR/NOPB support true-zero LED current during analog dimming?
Yes, the TPS92641PWPR/NOPB supports true-zero LED current via its auto-zero error amplifier (±600 µV offset) and valley-current control architecture. When IADJ is driven to 0 V, the controller maintains CCM operation and regulates average inductor current to zero - requiring only an external ROFF resistor from VOUT to CS for proper startup and ripple handling.
How does the SDIM/SDRV interface differ between TPS92641PWPR/NOPB and TPS92640PWPR?
The SDIM input and SDRV output are exclusive to the TPS92641PWPR/NOPB and are absent in TPS92640PWPR. TPS92641PWPR/NOPB uses these pins to drive an external shunt FET with 68–100 ns rising delay and 5.6–30 Ω sourcing resistance - enabling 20,000:1 PWM dimming - whereas TPS92640PWPR/NOPB relies solely on UDIM-driven main-FET dimming (2500:1 max).
What thermal performance can be expected from the TPS92641PWPR/NOPB in a standard PCB layout?
In a typical 2-layer PCB with 1 oz copper, 6–9 thermal vias under the DAP pad, and 1 in² of 2-oz inner-layer copper pour, the TPS92641PWPR/NOPB achieves RθJA = 38.7 °C/W. At 1.2 W dissipation and 85°C ambient, junction temperature remains at 132°C - within the 125°C rated limit only with adequate airflow or reduced load; derating is recommended above 1 W continuous.
Can the TPS92641PWPR/NOPB be used without an external shunt FET?
Yes, the TPS92641PWPR/NOPB functions fully as a standard synchronous buck LED controller even with SDIM floating and SDRV unused. Its core regulation, UDIM-based PWM dimming, analog dimming via IADJ, and protection features remain fully operational - the shunt-FET path is optional and adds only when ultra-deep dimming or true-zero capability is required.
TPS92641PWPR/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:
- Step-Down (Buck)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 7V
- Voltage - Supply (Max):
- 85V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 1MHz
- Dimming:
- Analog, PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS92641PWPR/NOPB FAQ
1.How can I place an order for TPS92641PWPR/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92641PWPR/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 TPS92641PWPR/NOPB reliable?
The price and inventory of TPS92641PWPR/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92641PWPR/NOPB is usually 5 days.
3.What payment methods are accepted for TPS92641PWPR/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92641PWPR/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92641PWPR/NOPB?
TPS92641PWPR/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92641PWPR/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 TPS92641PWPR/NOPB?
For technical support, including TPS92641PWPR/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92641PWPR/NOPB requirements.
6.How does Aetrix verify that TPS92641PWPR/NOPB is sourced from the original manufacturer or authorized distributors?
All TPS92641PWPR/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 TPS92641PWPR/NOPB meets industry standards.
7.What is the process for return or replacement of TPS92641PWPR/NOPB?
All TPS92641PWPR/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with TPS92641PWPR/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 TPS92641PWPR/NOPB part is unused and in its original packaging.
Return procedure for TPS92641PWPR/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS92641PWPR/NOPB Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
