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Texas Instruments TPS61183RTJR
- Part No.:
- TPS61183RTJR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
TPS61183RTJR.pdf
- Description:
- IC LED DRVR RGLTR PWM 30MA 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,693
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Product details
Overview
TPS61183RTJR from Texas Instruments is a white-LED driver IC with integrated 2-A, 40-V boost MOSFET, six 30-mA current sinks, programmable PWM dimming (20 kHz typical), and adaptive output voltage regulation up to 38 V. It targets notebook LCD backlight systems requiring high-current precision string control and robust fault protection.
For engineers reviewing the TPS61183RTJR datasheet, TPS61183RTJR pinout, TPS61183RTJR application, or TPS61183RTJR equivalent, this page delivers verified functional context, real-world dimming performance data, validated thermal metrics, confirmed package mapping to RTJ QFN-20, and two field-tested alternative parts with documented technical divergence.
Technical Context
The TPS61183RTJR implements current-mode PWM boost regulation with integrated loop compensation and adaptive output voltage control-maintaining the lowest IFB pin at 350 mV while dynamically adjusting VOUT to match WLED forward voltage requirements. Its dual-dimming architecture supports both direct PWM synchronization (100 Hz–50 kHz) and frequency-programmable mode (100 Hz–22 kHz) via external RFPWM resistor.
Functional modes are selected by RFPWM/MODE pin state: grounded for programmable mode (e.g., 9.09 kΩ → 20 kHz), tied to VDDIO for direct PWM mode. Six independent current sinks deliver ±2% max accuracy at 20 mA with ±1.5% typical matching, each sinking up to 30 mA with 350 mV compliance voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 24 V - supports wide-input battery-powered systems including 12 V nominal and 3-cell Li-ion configurations. |
| Max Output Voltage | 38 V - enables driving up to 10+ series white LEDs (e.g., 3.2 V × 11 = 35.2 V) with headroom for current sink compliance. |
| Switching Frequency | 280 kHz to 1 MHz - set by external RFSW resistor (e.g., 499 kΩ → 1 MHz); balances inductor size vs. efficiency trade-offs. |
| PWM Dimming Ratio | 100:1 at 20 kHz / 10000:1 at 200 Hz - enables precise brightness control across full luminance range without visible flicker. |
| Current Sink Accuracy | ±2% max (–40°C to 85°C), ±1.5% typical matching - ensures uniform backlight intensity across multiple LED strings. |
| Thermal Resistance | RθJA = 39.9°C/W (RTJ package) - requires PCB thermal pad connection to ground plane for reliable 2-A switching operation. |
| ESD Rating | ±4000 V HBM - meets industrial handling requirements without additional input protection circuitry. |
Pinout & Package
TPS61183RTJR uses a 20-pin QFN (RTJ) package with 4.00 mm × 4.00 mm body and exposed PowerPAD™ thermal pad soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | 4.5–24 V supply rail; connects to bulk input capacitor (≥1 µF ceramic). |
| SW | Boost switch node | Drain of internal 2-A, 40-V MOSFET; connects to inductor and catch diode. |
| PGND | Power ground | High-current return path for boost switch; separate from AGND to minimize noise coupling. |
| ISET | Current programming | Sets full-scale LED current via resistor (e.g., 62 kΩ → 20 mA per sink); reference voltage = 1.229 V. |
| IFB1–IFB6 | Current sink feedback | Each regulates one LED string; device maintains 350–650 mV across each pin for closed-loop control. |
| PWMIN | Brightness command input | Accepts 0.1–22 kHz PWM signal; determines dimming duty cycle in both direct and programmable modes. |
| RFPWM / MODE | Dimming mode selector | GND → programmable mode (RFPWM sets frequency); VDDIO → direct PWM mode (1:1 input/output sync). |
| FPO | Fault protection output | Open-drain active-low signal indicating OVP, OC, OT, or open/short LED faults. |
| FAULT | External FET drive | Drives isolation FET during fault conditions; sinks up to 20 µA at low voltage (≤0.4 V). |
| EN | Enable control | Active-high logic input; <0.8 V disables device (ISD ≤ 16 µA at 24 V). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2-A, 40-V power MOSFET | Eliminates external high-voltage switch; supports 38-V output with single-stage boost architecture. |
| Adaptive output voltage regulation | Automatically adjusts VOUT to minimum required for highest-string forward voltage + 350 mV sink headroom. |
| Programmable PWM dimming frequency | Resistor-selectable 100 Hz–22 kHz (programmable mode) or 100 Hz–50 kHz (direct mode) - avoids audible noise and EMI peaks. |
| 6-channel 30-mA current sinks | Enables parallel driving of up to 60 WLEDs (10 per string × 6 strings); ±1.5% typical matching ensures uniform backlight luminance. |
| Built-in fault protections | Detects and responds to overvoltage (OVP), overcurrent (OC), thermal shutdown (TSD), open/short LED - latches or auto-restarts per configuration. |
Applications
| Notebook LCD Backlight | Industrial Panel Display |
|---|---|
|
Use Scenario: Driving 6 parallel strings of 8–12 white LEDs in 13.3″–15.6″ notebook displays powered from 3-cell Li-ion (8.4–12.6 V). IC Role / Device Role / Timing Role: Primary WLED current controller and adaptive boost regulator; synchronizes dimming to system GPU timing signals. Use Value: Delivers 100:1 dimming at 20 kHz without visible flicker while maintaining ±1.5% current matching across strings for consistent color temperature. |
Use Scenario: Backlighting ruggedized HMI screens in factory automation panels operating from 24 V DC industrial rails. IC Role / Device Role / Timing Role: High-reliability LED driver with OVP, open/short LED detection, and thermal shutdown - critical for unattended operation. Use Value: 38-V output capability supports long LED strings; 4000-V HBM ESD rating withstands harsh ESD environments without external protection. |
| ATM Display Module | Fishfinder Screen |
|
Use Scenario: Illuminating outdoor ATM LCDs requiring wide dimming range (day/night ambient adaptation) and stable operation across –25°C to 70°C. IC Role / Device Role / Timing Role: Programmable PWM dimming controller with 10000:1 ratio at 200 Hz - enables ultra-low-brightness night mode without dropout. Use Value: ±2% current accuracy over full temperature range ensures consistent brightness calibration; RθJB = 9.9°C/W enables passive cooling in sealed enclosures. |
Use Scenario: Powering marine-grade fishfinder displays exposed to salt fog, vibration, and wide input voltage swings (10–16 V vehicle battery). IC Role / Device Role / Timing Role: Fault-tolerant WLED driver with built-in open/short LED detection and latch-off behavior on persistent faults. Use Value: FPO and FAULT pins interface directly with microcontroller watchdog logic; PGND/VIN separation minimizes noise in analog sensor front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white-LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61185RTJR | Same RTJ package, but supports only 4 current sinks (vs. 6) and lacks direct PWM mode; max ISINK = 30 mA unchanged. | Lower channel count suits smaller displays (e.g., 7″–10″ tablets); not suitable for 6-string notebook backlights. | Select when fewer LED strings are needed and programmable-only dimming suffices. |
| LM3409QMHX/NOPB | External MOSFET controller (no integrated switch); supports higher output voltages (>60 V); no built-in current sinks or PWM decoder. | Used in automotive LED lighting where >40 V operation or AEC-Q100 qualification is required; demands external current regulation. | Choose for designs needing >38 V output or AEC-Q100 compliance; requires added BOM complexity for current sensing and dimming logic. |
Compared with TPS61183RTJR, TPS61185RTJR reduces channel count and dimming flexibility but retains identical package and thermal design; LM3409QMHX/NOPB trades integration for higher voltage scalability and automotive qualification, requiring external components to replicate TPS61183RTJR's fully integrated functionality.
Availability
TPS61183RTJR is available at Aetrix Electronics and suitable for notebook backlight modules, industrial HMI displays, ATM interfaces, and marine electronics requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS61183RTJR 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 expertise in LED driver innovation and high-reliability power conversion.
The TPS61183RTJR belongs to TI's white-LED backlight driver product line, engineered specifically for high-efficiency, multi-string LCD panel illumination in portable and industrial computing devices with stringent dimming, thermal, and fault-protection requirements.
FAQ
What is the maximum number of white LEDs the TPS61183RTJR can drive?
The TPS61183RTJR supports up to 60 white LEDs using six independent 30-mA current sinks - typically configured as 6 strings of 10 LEDs (3.2 V × 10 = 32 V), staying within its 38-V maximum output voltage limit. String count and LED forward voltage must be validated against the actual VOUT requirement, including 350 mV sink headroom and worst-case temperature drift.
How does the TPS61183RTJR achieve adaptive output voltage regulation?
The TPS61183RTJR continuously monitors all six IFB pins and regulates the boost converter to maintain the *lowest* IFB voltage at 350 mV. This forces VOUT to track the highest forward voltage string plus 350 mV, minimizing power loss across current sinks. The feature is automatic and requires no external feedback resistors - unlike fixed-output boost controllers.
Can the TPS61183RTJR operate in direct PWM mode without external components?
Yes - tying the RFPWM/MODE pin directly to VDDIO configures the TPS61183RTJR for direct PWM mode, where IFB current sinks switch exactly in phase and frequency with the PWMIN signal. No external resistor is needed, though a 10–20 kΩ series resistor near PWMIN is recommended to suppress high-frequency noise in noisy environments.
What thermal design considerations apply to the TPS61183RTJR in continuous 2-A operation?
The TPS61183RTJR's RTJ package has RθJB = 9.9°C/W - meaning PCB copper area under the PowerPAD™ is critical. For 2-A switching at 12 V input/32 V output, ~1.5 W dissipation requires ≥250 mm² of 2-oz copper connected to ground. Thermal vias (≥6× 12-mil) beneath the pad are mandatory; ambient temperature must stay ≤85°C to avoid thermal shutdown at TJ = 150°C.
Does the TPS61183RTJR support open-LED and short-LED fault detection on all six channels?
Yes - the TPS61183RTJR includes dedicated open-LED and short-LED detection circuitry for all six IFB channels. An open condition pulls the corresponding IFB pin above 15 V (VOVP_IFB threshold), triggering FPO and FAULT outputs. A short condition drives IFB below 350 mV, also activating protection. Unused IFB pins should be shorted to AGND for fastest fault response and startup.
TPS61183RTJR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 24V
- Voltage - Output:
- 38V
- Current - Output / Channel:
- 30mA
- Frequency:
- 300kHz ~ 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
TPS61183RTJR FAQ
1.How can I place an order for TPS61183RTJR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61183RTJR 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 TPS61183RTJR reliable?
The price and inventory of TPS61183RTJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61183RTJR is usually 5 days.
3.What payment methods are accepted for TPS61183RTJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61183RTJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61183RTJR?
TPS61183RTJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61183RTJR 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 TPS61183RTJR?
For technical support, including TPS61183RTJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61183RTJR requirements.
6.How does Aetrix verify that TPS61183RTJR is sourced from the original manufacturer or authorized distributors?
All TPS61183RTJR 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 TPS61183RTJR meets industry standards.
7.What is the process for return or replacement of TPS61183RTJR?
All TPS61183RTJR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61183RTJR, 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 TPS61183RTJR part is unused and in its original packaging.
Return procedure for TPS61183RTJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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