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Texas Instruments TPS61195RUYT
- Part No.:
- TPS61195RUYT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
TPS61195RUYT.pdf
- Description:
- IC LED DRV RGLTR PWM 30MA 28WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,283
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Product details
Overview
TPS61195RUYT from Texas Instruments is a highly integrated white LED driver IC for large-format LCD backlighting, featuring an internal 2.5A/50V boost MOSFET, eight 30mA current sinks with ±1% string-to-string matching, adaptive output voltage regulation (up to 45V), and dual brightness control via PWM or SMBus interface. It supports up to 96 LEDs in parallel strings and operates from 4.5V to 21V input.
For engineers reviewing the TPS61195RUYT datasheet, TPS61195RUYT pinout, TPS61195RUYT application, or TPS61195RUYT equivalent, key selection considerations include its 8-channel WLED sink architecture, programmable 600kHz–1MHz switching frequency, 256-step SMBus brightness control, built-in open/short protection per string, and thermal shutdown at 150°C - all in a compact 28-pin 4×4 mm WQFN package.
Technical Context
The TPS61195RUYT integrates a current-mode boost regulator with internal loop compensation and adaptive output voltage control that dynamically adjusts the boost rail to maintain only 450mV headroom above the highest IFB string's forward voltage - minimizing power loss across current sinks. Its eight independent current regulators are precision-matched (±1%) and support simultaneous on/off switching during PWM dimming.
Dimming is implemented through three modes - no-delay PWM (internally generated 100Hz–5kHz frequency via FDIM resistor), direct PWM (synchronized to external DPWM signal, 200Hz–20kHz), and analog dimming (linear current scaling from 1%–100% based on duty cycle) - each selectable via SEL1/SEL2 pins. SMBus 2.0 interface enables digital brightness setting and fault reporting (e.g., string open/short, over-temperature).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 21V - supports wide-input notebook/netbook battery rails including 2-cell Li-ion (7.2V–8.4V) and 3-cell (10.8V–12.6V) configurations. |
| Boost Output Voltage | Up to 45V - sufficient for driving ≥12-series white LEDs (VF ≈ 3.5V each) while maintaining efficiency via adaptive regulation. |
| Current Sink Accuracy | ±1% string-to-string matching - ensures uniform luminance across multi-string LCD panels without external calibration. |
| Switching Frequency | 600kHz to 1MHz (resistor-programmable on FSW pin) - enables optimization between small inductor size (high-freq) and conduction-loss efficiency (low-freq). |
| Brightness Resolution | 8-bit (256 steps) via SMBus or PWM - provides fine-grained luminance control required for high-end display gamma correction. |
| Thermal Protection | 150°C junction shutdown with hysteresis - prevents permanent damage during sustained high-power operation in confined thermal environments. |
| Protection Features | Integrated WLED open/short detection, over-voltage (programmable via OVP pin), over-current (2.5A MOSFET limit), and soft-start - eliminates need for external fault management circuitry. |
Pinout & Package
TPS61195RUYT is housed in a thermally enhanced 28-pin WQFN package (4mm × 4mm, 0.4mm pitch) with exposed thermal pad (Pin 16 internally tied to AGND). The package supports high-power dissipation (θJB = 9.5°C/W) and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DPWM (Pin 1) | PWM dimming signal input | Accepts 200Hz–20kHz external PWM; used in Direct PWM and Analog dimming modes for real-time brightness control. |
| SEL1/SEL2 (Pins 2,3) | Dimming mode configuration | Two-pin binary encoding selects among No-delay PWM, Direct PWM, Analog, or SMBus interface - no external logic required. |
| VDDIO (Pin 4) | SMBus I/O supply | Provides 2.7–3.6V to SMBus transceivers; must be decoupled with 1µF capacitor - isolates digital noise from analog sections. |
| SDA/SCL (Pins 5,6) | SMBus 2.0 bidirectional interface | Enable register-based brightness setting, fault status readback (e.g., thermal alert, string failure), and DELL protocol compatibility. |
| IFB1–IFB8 (Pins 7–10,12–15) | LED current sink feedback inputs | Each regulates 30mA typical; sinking current into these pins sets LED string current - unused pins grounded to disable strings. |
| ISET (Pin 17) | Full-scale current programming | Resistor to AGND sets max sink current (e.g., 18.9kΩ → 30mA); accuracy maintained across temperature via internal 1.229V reference. |
| FDIM (Pin 18) | Internal PWM frequency set | Resistor to AGND programs dimming oscillator (100Hz–5kHz); determines flicker performance and EMI profile in No-delay PWM mode. |
| OVP (Pin 22) | Output over-voltage threshold | Resistor divider from boost output to AGND sets clamp level (e.g., 1MΩ/45.3kΩ → 45V) - protects LEDs from catastrophic overvoltage. |
| SW1/SW2 (Pins 23,24) | Internal MOSFET drain terminals | Connect to boost inductor; dual SW pins reduce trace inductance and improve thermal spreading for 2.5A continuous operation. |
| EN (Pin 25) | Global enable/disable | Logic-high enables LDO, SMBus, and regulation; logic-low reduces quiescent current to ≤15µA - critical for system-level power gating. |
| VIN (Pin 26) | Main power input | Supplies both boost stage and internal LDO; includes 3.55V UVLO with 250mV hysteresis to prevent brownout instability. |
| FSW (Pin 27) | Switching frequency programming | Resistor to AGND sets boost frequency (600kHz–1MHz); higher values lower frequency - balances efficiency vs. component size. |
| FDPWM (Pin 28) | PWM counter bias | 43.2kΩ to AGND enables high-speed digital duty-cycle measurement of DPWM signal - ensures <1-cycle response latency. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Boost Output Regulation | Maintains only 450mV overhead above highest IFB string voltage - reduces power dissipation in current sinks by up to 30% vs. fixed-output boost drivers. |
| Eight Precision Current Sinks | 30mA per channel with ±1% matching across strings - eliminates visible brightness gradients in large-panel LCD backlights. |
| Dual Interface Dimming Control | Hardware PWM (DPWM pin) and digital SMBus 2.0 coexist - allows OEM firmware flexibility without hardware redesign. |
| Programmable Protection Thresholds | OVP, over-temperature, and IFB overvoltage (12.5–15.5V) thresholds set externally - enables system-specific safety margins. |
| Integrated Linear Regulator for VDDIO | On-chip LDO powers SMBus interface from VIN - removes need for external 3.3V rail and simplifies BOM for space-constrained designs. |
| Unused String Disable Logic | Grounding IFBx disables that sink; open IFBx triggers automatic removal from feedback loop - avoids overvoltage during startup with partial LED arrays. |
Applications
| Notebook LCD Backlighting | Netbook Display Power Management |
|---|---|
|
Use Scenario: Driving 48–96 white LEDs in 6–8 parallel strings for 13.3″–15.6″ TFT-LCD panels in ultraportable notebooks. IC Role / Device Role / Timing Role: Primary WLED current controller and adaptive boost regulator; manages dynamic brightness scaling during battery-saver mode transitions. Use Value: Enables >90% peak efficiency at 21V input/33V output while maintaining ±1% luminance uniformity across full 0–100% dimming range. |
Use Scenario: Powering dual 10.1″ displays in convertible netbooks with shared boost stage and independent dimming per panel. IC Role / Device Role / Timing Role: Dual-string current sink supervisor with SMBus-addressable registers - allows OS-level per-display brightness control. Use Value: Reduces component count by integrating two independent 4-string controllers in one 4×4 mm package, cutting PCB area by 40% vs. dual-driver solutions. |
| Industrial Panel PC Backlighting | Medical Imaging Display Illumination |
|
Use Scenario: Backlighting ruggedized 12″–19″ industrial LCDs operating in extended temperature ranges (−40°C to +85°C ambient). IC Role / Device Role / Timing Role: Fault-tolerant WLED driver with real-time SMBus reporting of open/short string events and thermal alerts. Use Value: Built-in diagnostics eliminate need for external sense resistors and microcontroller polling - improves system MTBF and reduces firmware complexity. |
Use Scenario: High-stability illumination for diagnostic-grade grayscale medical monitors requiring precise luminance linearity and zero flicker. IC Role / Device Role / Timing Role: Analog dimming mode controller with <1% current error across 1–100% range - ensures DICOM GSDF compliance. Use Value: Eliminates PWM-induced color shift and audible ceramic capacitor noise common in PWM-dimming systems - critical for clinical image fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61194RUYT | 7-channel version (vs. 8-channel); identical pinout, same 2.5A/50V MOSFET and SMBus/PWM interfaces. | Supports up to 84 LEDs instead of 96; suitable when fewer strings are needed and board layout reuse is prioritized. | Select TPS61194RUYT if design uses ≤7 LED strings and requires footprint compatibility with TPS61195RUYT for BOM rationalization. |
| LM3409QMHX/NOPB | Single-channel, external-FET LED controller (no integrated MOSFET); supports up to 40V output but requires external 50V MOSFET and gate driver. | Targeted at high-current single-string applications (e.g., automotive center stack); lacks multi-string matching and SMBus interface. | Choose LM3409QMHX/NOPB only for custom high-efficiency single-string designs where thermal design permits discrete FET placement and SMBus is unnecessary. |
Compared with TPS61194RUYT, the TPS61195RUYT adds one current sink channel for higher LED count scalability without layout change; versus LM3409QMHX/NOPB, it delivers integrated power stage, multi-string precision, and digital control - reducing total solution size by >35% and eliminating 12+ external components.
Availability
TPS61195RUYT is available at Aetrix Electronics and suitable for notebook backlighting, industrial HMI displays, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS61195RUYT 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 expertise in display power solutions and automotive-grade reliability standards.
The TPS61195RUYT belongs to TI's WLED backlight driver product line, engineered specifically for high-efficiency, multi-string LCD panel illumination in portable computing and industrial displays - emphasizing precision current matching, adaptive voltage regulation, and robust fault protection.
FAQ
What is the maximum number of white LEDs supported by the TPS61195RUYT?
The TPS61195RUYT supports up to 96 white LEDs arranged across eight parallel strings (12 LEDs per string typical), enabled by its eight 30mA current sinks and 45V boost output capability. Each IFB pin regulates one string, and unused sinks are disabled by grounding - allowing flexible configuration from 1 to 8 strings without hardware changes.
How does the TPS61195RUYT achieve adaptive boost output voltage regulation?
The TPS61195RUYT continuously monitors the voltage at each IFB pin and regulates the boost converter output to maintain exactly 450mV across the highest-loaded string. This adaptive method minimizes power loss in the current sinks - unlike fixed-output drivers - and improves overall efficiency by up to 30% under partial-load conditions.
Can the TPS61195RUYT operate with both SMBus and PWM interfaces simultaneously?
No - the TPS61195RUYT uses SEL1 and SEL2 pins to select one active interface at a time: either SMBus (SDA/SCL) or hardware PWM (DPWM). Table 1 in the datasheet defines the pin states for each mode. Simultaneous use is not supported; however, firmware can reconfigure the interface dynamically by toggling SEL1/SEL2 and issuing appropriate commands.
What protection features are integrated into the TPS61195RUYT?
The TPS61195RUYT integrates WLED open-circuit and short-circuit detection per string, programmable output over-voltage protection (via OVP pin), over-temperature shutdown at 150°C, over-current limiting (2.5A MOSFET), and input under-voltage lockout (3.55V). These eliminate the need for external protection ICs or discrete sensing circuits.
Is the TPS61195RUYT pin-compatible with other members of the TPS6119x family?
Yes - the TPS61195RUYT shares identical 28-pin WQFN (RUY) packaging and pinout with TPS61194RUYT (7-channel) and TPS61196RUYT (6-channel), enabling drop-in replacement when adjusting LED string count. All variants use the same footprint, thermal pad layout, and interface signaling - simplifying design reuse and BOM consolidation.
TPS61195RUYT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-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:
- 8
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 21V
- Voltage - Output:
- 4.5V ~ 45V
- Current - Output / Channel:
- 30mA
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-WQFN (4x4)
TPS61195RUYT FAQ
1.How can I place an order for TPS61195RUYT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61195RUYT 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 TPS61195RUYT reliable?
The price and inventory of TPS61195RUYT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61195RUYT is usually 5 days.
3.What payment methods are accepted for TPS61195RUYT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61195RUYT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61195RUYT?
TPS61195RUYT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61195RUYT 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 TPS61195RUYT?
For technical support, including TPS61195RUYT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61195RUYT requirements.
6.How does Aetrix verify that TPS61195RUYT is sourced from the original manufacturer or authorized distributors?
All TPS61195RUYT 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 TPS61195RUYT meets industry standards.
7.What is the process for return or replacement of TPS61195RUYT?
All TPS61195RUYT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61195RUYT, 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 TPS61195RUYT part is unused and in its original packaging.
Return procedure for TPS61195RUYT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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