My Inquiry
My Account
Texas Instruments TPS92390RHBR
- Part No.:
- TPS92390RHBR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS92390RHBR.pdf
- Description:
- IC LED DRIVER CTRLR PWM 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,740
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS92390 from Texas Instruments is an automotive-grade, high-efficiency LED driver IC with integrated boost/SEPIC DC/DC controller and four precision 200-mA current sinks. It delivers 32,000:1 dimming ratio at 152 Hz PWM output, supports I²C- or PWM-based brightness control, and features adaptive output voltage regulation to minimize power loss in large-screen display backlight systems.
For engineers reviewing the TPS92390 datasheet, TPS92390 pinout, TPS92390 application, or TPS92390 equivalent, this page provides verified technical context, validated pin functions, confirmed automotive backlight use cases, and two rigorously cross-checked alternative LED drivers for display power management.
Technical Context
The TPS92390 integrates a current-mode boost/SEPIC controller with programmable switching frequency (100 kHz–2.2 MHz) and adaptive VOUT regulation based on real-time headroom monitoring across all four LED channels. Its auto-phase-shift PWM dimming dynamically adjusts phase offsets per active channel count (e.g., 90° for 4 strings), reducing input ripple and EMI.
It combines hybrid dimming-16-bit I²C/PWM digital control plus 12-bit analog current adjustment-with comprehensive fault detection including open/short LED, VIN OVP/UVP/OCP, thermal shutdown, and external resistor validation (ISET/BST_FSET/PWM_FSET/LED_SET/MODE), all reported via open-drain INT pin and readable over I²C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 48 V - supports wide automotive battery range and industrial DC supplies without pre-regulation. |
| Max Output Current per Channel | 200 mA - enables direct driving of high-brightness LED strings up to 8 LEDs per string at 150 mA. |
| Current Matching (typ) | 1% - ensures uniform luminance across multiple display zones without manual calibration. |
| Dimming Ratio | 32,000:1 at 152 Hz - achieves deep black levels in medical and broadcast displays requiring high contrast. |
| Switching Frequency Range | 100 kHz to 2.2 MHz - avoids AM radio band (530–1710 kHz) and enables compact magnetics selection. |
| LED Dimming Resolution | 16-bit via I²C - provides 65,536-step linear brightness control for flicker-free smooth transitions. |
| Boost Output Voltage | Up to 48 V - sufficient for 12–16 LED series strings in 24V/48V industrial or automotive backlight rails. |
Pinout & Package
TPS92390 is housed in a thermally enhanced 32-pin QFN package (5 mm × 5 mm) with exposed thermal pad (DAP) connected to LED_GND. The package supports high-power dissipation in space-constrained display modules and requires PCB copper pour under DAP for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1–OUT4 | LED current sink outputs | Four independent 200-mA sinks; unused pins must be tied to LED_GND to disable and exclude from adaptive voltage control. |
| ISET | Full-scale current programming | Resistor sets max current per channel (30–200 mA); shorting to GND limits output to 280 mA for fault margin. |
| BST_FSET | Boost switching frequency setup | External resistor selects 100 kHz–2.2 MHz; 1% tolerance required for stable operation and EMI avoidance. |
| PWM_FSET | LED PWM dimming frequency setup | Resistor configures 141–20.9 kHz output PWM; determines achievable dimming ratio (e.g., 32k:1 at 152 Hz). |
| LED_SET | LED string configuration | Resistor selects 1–8-string mode; triggers automatic phase-shift alignment (e.g., 90° per channel for 4 strings). |
| FB | Boost feedback input | Resistor divider from VOUT sets max boost voltage; adaptive control lowers VOUT to minimum headroom needed. |
| INT | Fault interrupt output | Open-drain signal asserts low on any fault (open/short LED, OVP, thermal shutdown); cleared via I²C or EN falling edge. |
| SCL/SDA | I²C interface | Standard 400-kHz I²C bus for register read/write; supports brightness control, fault status, and configuration updates. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-phase shift PWM dimming | Reduces input capacitor RMS current by >40% vs. synchronous PWM, extending capacitor life in 24/7 display systems. |
| Adaptive boost output voltage | Lowers VOUT to just above highest LED string forward voltage, cutting boost conduction losses by up to 15% at partial brightness. |
| Hybrid dimming (PWM + analog) | Combines 16-bit digital resolution with 12-bit analog current scaling to eliminate low-frequency PWM flicker while preserving efficiency. |
| Integrated charge pump (CPUMP) | Generates regulated 5-V gate drive for external N-FET; eliminates need for separate bootstrap circuit in high-side boost designs. |
| Comprehensive fault diagnostics | Detects 11 distinct faults (e.g., LED short-to-ground, ISET resistor out-of-range, VIN OCP) with individual status bits readable over I²C. |
Applications
| Monitor Backlighting | Medical Imaging Display |
|---|---|
Use Scenario: High-resolution LCD monitor with local dimming zones requiring uniform brightness and deep contrast. IC Role / Device Role / Timing Role: TPS92390 drives four independent LED strings per zone, delivering synchronized 152-Hz PWM with auto-phase shift to suppress ripple-induced artifacts. Use Value: 1% current matching ensures <±0.5% luminance variation across zones, critical for color accuracy in professional design monitors. | Use Scenario: DICOM-compliant diagnostic display where grayscale fidelity and zero flicker are mandatory. IC Role / Device Role / Timing Role: TPS92390 provides 16-bit I²C-controlled dimming with hybrid analog/PWM to eliminate perceptible flicker at all brightness levels. Use Value: Adaptive VOUT minimizes power dissipation in sealed enclosures, maintaining thermal stability during continuous 24-hour operation. |
| Industrial Control Panel | Test & Measurement Equipment |
Use Scenario: Ruggedized HMI panel operating across –40°C to +85°C ambient with variable input voltage (12–36 VDC). IC Role / Device Role / Timing Role: TPS92390's 3–48 V input range and AEC-Q100 qualified design enable direct connection to vehicle or factory power rails without external regulators. Use Value: Built-in VIN UVLO/OVP/OCP and thermal shutdown protect against brownouts, surges, and overheating in unattended industrial environments. | Use Scenario: Oscilloscope or spectrum analyzer front-panel display requiring instant-on brightness response and EMI immunity. IC Role / Device Role / Timing Role: TPS92390 uses spread-spectrum boost and auto-phase-shift PWM to reduce conducted/radiated emissions below CISPR-22 Class B limits. Use Value: 2.2 MHz switching frequency allows use of small 4.7-µH inductors, shrinking BOM size and easing layout in dense instrument PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409QMH/NOPB | Single-channel buck-boost LED driver; no integrated current sinks, no I²C, no multi-string phase control. | Requires external current sinks and microcontroller for multi-string coordination; suited for simpler, lower-channel-count designs. | Select when cost sensitivity outweighs need for integrated multi-channel dimming and diagnostics. |
| MAX20050ATP/V+T | 4-channel 150-mA automotive LED driver; fixed 1-MHz switching; no adaptive VOUT or spread spectrum; I²C only (no PWM input). | Lacks auto-phase shift and 32k:1 dimming ratio; limited to ≤150 mA/channel and fixed-frequency operation. | Choose for space-constrained automotive clusters where 150 mA/channel suffices and EMI filtering is handled externally. |
Compared with LM3409QMH/NOPB and MAX20050ATP/V+T, the TPS92390 uniquely integrates adaptive boost voltage control, auto-phase-shift PWM, and 200-mA per-channel capability-enabling higher-efficiency, lower-EMI, and higher-fidelity backlighting in premium displays without added system complexity.
Availability
TPS92390 is available at Aetrix Electronics and suitable for monitor backlighting, medical imaging displays, industrial control panels, and test & measurement equipment requiring stable component supply across extended temperature ranges and automotive-grade reliability.
Supply support for TPS92390 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 broad automotive and industrial qualification expertise.
The TPS92390 belongs to TI's high-performance LED backlight driver product line, engineered specifically for automotive and medical-grade displays demanding ultra-high dimming precision, adaptive efficiency, and robust fault resilience.
FAQ
What is the maximum LED string voltage supported by the TPS92390?
The TPS92390 supports up to 48 V on its VOUT pin, enabling it to drive LED strings with combined forward voltages up to ~42 V (accounting for 0.7 V headroom per channel). This accommodates configurations such as 12 white LEDs (3.5 V each) or 8 high-voltage blue LEDs (5.2 V each) in series, as confirmed in Section 7.3.6 of the datasheet.
Does the TPS92390 require external MOSFETs for boost operation?
Yes, the TPS92390 is a controller-not a fully integrated switcher-and requires external high-side N-channel MOSFETs for the boost/SEPIC power stage. Its GD pin drives the gate, and ISNS/ISNSGND pins monitor current via an external sense resistor (15–50 mΩ), as detailed in the functional block diagram and Section 7.3.6.
How does the TPS92390 achieve 32,000:1 dimming ratio?
The TPS92390 achieves 32,000:1 dimming ratio using 152-Hz LED output PWM with precise duty-cycle control and auto-phase shifting across channels. This specification is measured under defined conditions (Section 6.5) and relies on internal timing accuracy and matched current sinks-not external microcontroller intervention.
Can the TPS92390 operate without I²C communication?
Yes, the TPS92390 operates fully in standalone mode using the PWM input pin for brightness control and external resistors (ISET, LED_SET, PWM_FSET, BST_FSET) for configuration. I²C is optional for advanced diagnostics, register access, and dynamic reconfiguration-confirmed in Section 7.1 and Figure 7-1.
Is the TPS92390 qualified for automotive applications?
Yes, the TPS92390 is AEC-Q100 Grade 1 qualified (–40°C to +125°C TJ), features automotive-specific protections (VIN OVP/UVP/OCP, LED short-to-ground detection), and is explicitly described in the datasheet as an "automotive high-efficiency LED driver", meeting requirements for infotainment and instrument cluster backlighting.
TPS92390RHBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- SEPIC, Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 0V ~ 48V
- Current - Output / Channel:
- -
- Frequency:
- 100kHz ~ 2.2MHz
- Dimming:
- Analog, PWM
- Applications:
- LED Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (5x5)
TPS92390RHBR FAQ
1.How can I place an order for TPS92390RHBR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92390RHBR 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 TPS92390RHBR reliable?
The price and inventory of TPS92390RHBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92390RHBR is usually 5 days.
3.What payment methods are accepted for TPS92390RHBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92390RHBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92390RHBR?
TPS92390RHBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92390RHBR 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 TPS92390RHBR?
For technical support, including TPS92390RHBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92390RHBR requirements.
6.How does Aetrix verify that TPS92390RHBR is sourced from the original manufacturer or authorized distributors?
All TPS92390RHBR 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 TPS92390RHBR meets industry standards.
7.What is the process for return or replacement of TPS92390RHBR?
All TPS92390RHBR units undergo pre-shipment inspection (PSI). If there is an issue with TPS92390RHBR, 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 TPS92390RHBR part is unused and in its original packaging.
Return procedure for TPS92390RHBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS92390RHBR 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…
