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Texas Instruments TPS92691PWPR
- Part No.:
- TPS92691PWPR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS92691PWPR.pdf
- Description:
- IC LED DRIVER CTRLR PWM 16HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS92691PWPR from Texas Instruments is a wide-input (4.5 V to 65 V), fixed-frequency peak-current-mode LED controller supporting boost, buck, and buck-boost topologies. It delivers ±3% LED current accuracy over –40°C to 140°C junction temperature, features a rail-to-rail current sense amplifier (0 V to 60 V common-mode), programmable 80–700 kHz switching frequency, and integrated DDRV gate driver for >1000:1 PWM dimming. It is used in automotive exterior lighting and high-reliability architectural LED systems.
For engineers reviewing the TPS92691PWPR datasheet, TPS92691PWPR pinout, TPS92691PWPR application, or TPS92691PWPR equivalent, key selection criteria include its high-side/low-side current sense flexibility, analog dimming range (140 mV–2.25 V at IADJ), IMON-based open/short fault reporting, and OVP threshold programmability via external resistor divider.
Technical Context
The TPS92691PWPR implements fixed-frequency peak-current-mode control with programmable slope compensation and soft-start timing. Its rail-to-rail current sense amplifier supports differential input (CSP–CSN) up to 60 V common-mode voltage and achieves <±5.9 mV cumulative offset over –40°C to 140°C.
It integrates dual N-channel gate drivers: GATE (500 mA peak source/sink) for main power switch control and DDRV (500 mA peak) for series FET dimming. Fault protection includes cycle-by-cycle current limiting (525 mV IS threshold), hysteresis-based OVP (1.24 V nominal threshold), thermal shutdown (175°C), and VCC UVLO (4.1 V rising, 4.0 V falling).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 65 V - supports automotive battery crank (4.5 V) and industrial 48 V bus without external pre-regulator. |
| LED Current Accuracy | Better than ±3% over –40°C to 140°C - enables stable brightness across full automotive ambient range without recalibration. |
| Switching Frequency | 80 kHz to 700 kHz (programmable via RT resistor) - balances efficiency, EMI, and MOSFET loss trade-offs across topologies. |
| Current Sense Common-Mode | 0 V to 60 V - allows direct high-side or low-side sensing in boost/buck configurations driving 1–20+ white LEDs. |
| Analog Dimming Range | 15:1 linear contrast (IADJ = 140 mV to 2.25 V) - provides smooth, flicker-free brightness control without PWM artifacts. |
| PWM Dimming Ratio | Over 1000:1 with external series FET - achieved via DDRV output enabling high-contrast displays and adaptive lighting. |
| OVP Threshold | Programmable (1.18–1.31 V at OVP pin) - sets output overvoltage protection with hysteresis for robust string-open fault handling. |
Pinout & Package
TPS92691PWPR is housed in a 16-pin HTSSOP package (5.10 mm × 6.60 mm) with exposed PowerPAD™ thermal pad. The PowerPAD must be connected to PCB ground plane using multiple vias for thermal performance and functional grounding of AGND/PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Primary input for internal VCC LDO (65 V max); bypassed with 100 nF capacitor near pin. |
| SS | Soft-start control | Capacitor-connected node extending startup time; shorting to AGND disables switching. |
| RT/SYNC | Oscillator programming & sync input | Resistor sets switching frequency; AC-coupled external clock synchronizes operation. |
| PWM | Digital dimming control | Schmitt-trigger input (2.0–2.7 V thresholds) controlling GATE/DDRV and oscillator enable. |
| COMP | Error amplifier output | Transconductance output (121 µA/V) requiring RC network for loop stability and bandwidth control. |
| IADJ | Analog current reference | High-impedance input (90 nA bias) setting LED current threshold; 0.14–2.25 V range enables 15:1 dimming. |
| IMON | Continuous LED current monitor | Voltage output (VIMON = 14 × ILED × RCS) for real-time fault detection (open/short) and diagnostics. |
| AGND | Analog ground reference | Return path for internal references and analog circuitry; tied to PowerPAD and system ground. |
| CSP / CSN | Current sense amplifier inputs | Differential pair measuring shunt voltage (CSP–CSN); supports 0–60 V common-mode range. |
| DDRV | Series FET gate driver | 500 mA peak drive output enabling >1000:1 PWM contrast with external N-FET in LED path. |
| OVP | Overvoltage protection input | Resistor-divider input detecting output overvoltage; 1.24 V nominal threshold with hysteresis. |
| PGND | Power ground return | Return for GATE/DDRV drivers and IS current sense; tied to PowerPAD and system ground. |
| IS | Switch current sense | Input monitoring MOSFET source current for cycle-by-cycle current limiting (525 mV threshold). |
| GATE | Main power switch driver | N-channel gate driver (500 mA peak) controlling external high-side or low-side switching FET. |
| VCC | Internal bias supply | 7.5 V regulated output (2.2–4.7 µF bypass required); powers internal logic and gate drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail current sense amplifier | 0 V to 60 V common-mode input range enables flexible high-side or low-side shunt placement in any topology. |
| Integrated DDRV gate driver | 500 mA peak drive capability supports fast-switching external N-FET for >1000:1 PWM dimming ratio. |
| Continuous IMON current reporting | Voltage output proportional to LED current (14× gain) enables real-time open/short fault detection independent of topology. |
| Programmable OVP with hysteresis | External resistor divider sets precise overvoltage threshold and hysteresis for reliable string-open protection. |
| Thermal shutdown with hysteresis | 175°C trip point and 25°C hysteresis prevent thermal runaway while avoiding oscillation near limit. |
Applications
| Automotive Exterior Lighting | Architectural LED Signage |
|---|---|
Use Scenario: Headlamp and DRL modules requiring AEC-Q100 Grade 1 compliance, wide input range (6–16 V battery), and thermal resilience. IC Role / Device Role / Timing Role: Primary LED current controller implementing constant-current regulation with analog + PWM dimming and fault reporting. Use Value: ±3% current accuracy over –40°C to 140°C ensures consistent lumen output across vehicle operating conditions. |
Use Scenario: Outdoor LED signage with long strings (15–25 LEDs), exposed to ambient temperatures from –40°C to 85°C. IC Role / Device Role / Timing Role: Buck-boost LED driver controller supporting variable input (12–48 V DC) and high-output-voltage capability (up to 65 V). Use Value: Rail-to-rail CSP/CSN inputs allow direct high-side sensing, eliminating level-shifting complexity in high-voltage string designs. |
| Industrial Machine Vision Lighting | Commercial Indoor Lighting |
Use Scenario: High-speed strobed illumination for inspection systems requiring microsecond-level PWM dimming precision. IC Role / Device Role / Timing Role: Timing-critical LED driver with DDRV output enabling sub-100 ns PWM edge control and >1000:1 contrast. Use Value: Dedicated DDRV driver and low propagation delay (<72 ns fall time) ensure accurate, jitter-free strobe timing. |
Use Scenario: Smart ceiling fixtures with DALI/0–10 V interface requiring smooth analog dimming and diagnostic feedback. IC Role / Device Role / Timing Role: Constant-current LED controller interfacing with external DAC for IADJ voltage control and IMON for health monitoring. Use Value: 15:1 linear analog dimming range (140 mV–2.25 V) delivers flicker-free dimming compatible with legacy 0–10 V systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS92692PWPR | Includes integrated 5-V LDO for auxiliary bias; lacks DDRV output; same pinout and core control architecture. | Preferred where external 5-V rail needed for sensors/microcontrollers; unsuitable for series-FET dimming. | Select TPS92692PWPR only if auxiliary 5-V supply is required and DDRV functionality is unnecessary. |
| LM3410XMM/NOPB | Fixed 1.6-MHz frequency; no programmable RT/SYNC; no IMON output; no DDRV; lower VIN max (42 V). | Targeted at compact, cost-sensitive single-LED applications; lacks diagnostics and multi-topology flexibility. | Choose LM3410XMM/NOPB for simple boost drivers under 42 V input where diagnostics and dimming flexibility are secondary. |
Compared with TPS92691PWPR, TPS92692PWPR adds auxiliary bias but removes DDRV-driven high-contrast dimming, while LM3410XMM/NOPB sacrifices programmability, diagnostics, and voltage range for integration and cost-making TPS92691PWPR optimal for demanding multi-topology, fault-aware LED systems.
Availability
TPS92691PWPR is available at Aetrix Electronics and suitable for automotive exterior lighting, architectural LED signage, and industrial machine vision lighting requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for TPS92691PWPR 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 qualification processes.
The TPS92691PWPR belongs to TI's high-reliability LED controller product line, engineered specifically for automotive exterior lighting and industrial LED systems demanding wide input range, precision current regulation, and comprehensive fault protection.
FAQ
What is the maximum input voltage rating for the TPS92691PWPR?
The TPS92691PWPR supports an absolute maximum input voltage of 65 V on the VIN pin, with recommended operating range from 4.5 V to 65 V. This enables direct connection to automotive battery rails-including cold-crank conditions down to 4.5 V-and compatibility with 48 V industrial systems without external step-down stages. Operation above 65 V risks permanent damage per absolute maximum ratings.
How does the TPS92691PWPR achieve ±3% LED current accuracy over temperature?
The TPS92691PWPR achieves better than ±3% LED current accuracy from –40°C to 140°C junction temperature through a combination of low-offset rail-to-rail current sense amplifier (±5.9 mV max cumulative offset), precision internal references (1.24 V OVP, 2.42 V IADJ clamp), and temperature-stable transconductance error amplifier (121 µA/V). These elements maintain tight regulation without external calibration across the full automotive thermal envelope.
Can the TPS92691PWPR be used in both boost and buck LED driver topologies?
Yes, the TPS92691PWPR is explicitly designed for multi-topology operation including boost, buck, and buck-boost configurations. Its rail-to-rail current sense amplifier (0 V to 60 V common-mode) and independent GATE and DDRV drivers allow flexible placement of the current sense resistor and power switch-enabling high-side or low-side sensing and either high-side or low-side switch control in any topology.
What is the function of the IMON pin on the TPS92691PWPR?
The IMON pin on the TPS92691PWPR provides a continuous voltage output proportional to LED current: VIMON = 14 × ILED × RCS. This enables real-time monitoring for open-circuit (IMON ≈ 0 V) and short-circuit (IMON saturated at ~3.7 V clamp) detection, independent of driver topology. It supports system-level diagnostics and cable harness fault identification without additional sensing circuitry.
Does the TPS92691PWPR support external clock synchronization?
Yes, the TPS92691PWPR supports external clock synchronization via the RT/SYNC pin. An AC-coupled external clock (100 nF series capacitor) can be applied to synchronize the internal oscillator within ±20% of the RT-set frequency. If synchronization is lost, the device automatically reverts to free-running mode using the RT resistor-ensuring uninterrupted LED current regulation during transient clock faults.
TPS92691PWPR 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-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 65V
- Voltage - Output:
- 65V
- Current - Output / Channel:
- -
- Frequency:
- 80kHz ~ 700kHz
- Dimming:
- Analog, PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS92691PWPR FAQ
1.How can I place an order for TPS92691PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92691PWPR 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 TPS92691PWPR reliable?
The price and inventory of TPS92691PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92691PWPR is usually 5 days.
3.What payment methods are accepted for TPS92691PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92691PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92691PWPR?
TPS92691PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92691PWPR 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 TPS92691PWPR?
For technical support, including TPS92691PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92691PWPR requirements.
6.How does Aetrix verify that TPS92691PWPR is sourced from the original manufacturer or authorized distributors?
All TPS92691PWPR 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 TPS92691PWPR meets industry standards.
7.What is the process for return or replacement of TPS92691PWPR?
All TPS92691PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS92691PWPR, 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 TPS92691PWPR part is unused and in its original packaging.
Return procedure for TPS92691PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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