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Texas Instruments TPS61195RUYR
- Part No.:
- TPS61195RUYR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
TPS61195RUYR.pdf
- Description:
- IC LED DRV RGLTR PWM 30MA 28WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,682
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Product details
Overview
TPS61195RUYR from Texas Instruments is a high-efficiency WLED boost driver IC for large-format LCD backlighting, integrating an internal 2.5A/50V MOSFET, eight 30mA current sinks with ±1% string-to-string matching, adaptive boost output 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 TPS61195RUYR datasheet, TPS61195RUYR pinout, TPS61195RUYR application, or TPS61195RUYR equivalent, key selection considerations include its 8-channel current sink architecture, programmable 600kHz–1MHz switching frequency, 256-step SMBus brightness control, built-in open/short protection, and 4×4 mm WQFN-28 package with thermal pad.
Technical Context
The TPS61195RUYR employs current-mode PWM boost regulation with internal loop compensation and adaptive output voltage control-dynamically adjusting VOUT to maintain only 450mV headroom across the lowest IFB pin. Its eight independent current sinks are precision-matched (±1%) and individually disableable by grounding unused IFB pins.
Dimming is implemented through three modes-no-delay PWM (internally clocked via FDIM resistor), direct PWM (synchronized to external DPWM signal), and analog dimming (linear current scaling)-all selectable via SEL1/SEL2 logic pins. SMBus 2.0 interface enables digital brightness setting and real-time fault reporting (e.g., LED string failure, over-temperature).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 21V - supports wide-input battery and adapter supplies in notebook/netbook platforms. |
| Boost Output Voltage | Up to 45V - sufficient for ≥12-series white LEDs per string at typical forward voltages. |
| Current Sink Accuracy | ±1% string-to-string matching - ensures uniform luminance across multi-string LCD backlights. |
| Switching Frequency | 600kHz to 1MHz (resistor-programmable on FSW pin) - enables optimization of inductor size vs. efficiency. |
| Brightness Resolution | 8-bit (256 steps) via SMBus or PWM duty cycle - provides fine-grained luminance control for UI consistency. |
| Thermal Protection | 150°C shutdown with hysteresis - prevents damage during sustained high-power operation in confined enclosures. |
| Package | 28-pin WQFN (4mm × 4mm, 0.4mm pitch, exposed thermal pad) - supports high-power density PCB layout with low θJB = 9.5°C/W. |
Pinout & Package
TPS61195RUYR is housed in a thermally enhanced 28-pin WQFN package (RU Y suffix), measuring 4.0mm × 4.0mm × 0.8mm with an exposed thermal pad (pin 16 internally tied to AGND). The package supports high-current routing and efficient heat dissipation in space-constrained backlight modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DPWM (Pin 1) | PWM dimming signal input | Accepts 200Hz–20kHz external PWM; enables direct synchronization of all 8 current sinks without latency. |
| SEL1 / SEL2 (Pins 2, 3) | Dimming mode configuration | Logic-selectable interface (PWM/SMBus) and dimming method (analog/direct/no-delay PWM) per Table 1. |
| VDDIO (Pin 4) | SMBus I/O supply rail | Provides 2.7–3.6V for SDA/SCL interface; must be decoupled with 1µF capacitor to ensure noise immunity. |
| SDA / SCL (Pins 5, 6) | SMBus 2.0 bidirectional interface | Supports DELL-compliant backlight commands, including brightness write, status read, and fault reporting. |
| IFB1–IFB8 (Pins 7–10, 12–15) | Current sink feedback inputs | Each regulates 30mA sink current; voltage clamped at 450mV (min) for adaptive boost control. |
| ISET (Pin 17) | Full-scale current programming | Resistor-to-AGND sets max sink current (e.g., 953kΩ → 30mA); KISET = 1060 typ. |
| FDIM (Pin 18) | Internal PWM dimming frequency | Resistor-to-AGND programs 100Hz–5kHz oscillator (e.g., 953kΩ → 210Hz) for no-delay PWM mode. |
| OVP (Pin 22) | Over-voltage protection threshold | Resistor divider from VOUT to AGND sets clamp point (e.g., 1MΩ/45.3kΩ → 45V). |
| SW1 / SW2 (Pins 23, 24) | Internal MOSFET drain terminals | Connect to boost inductor; rated for 50V VDS, 2.5A continuous, 4.5A peak current. |
| EN (Pin 25) | Enable/disable control | High = active; low = <50µA shutdown; initiates soft-start sequence on rising edge. |
| VIN (Pin 26) | Main power input | Supplies internal LDO (VDDIO) and boost converter; includes 3.55V UVLO with 250mV hysteresis. |
| FSW (Pin 27) | Switching frequency programming | Resistor-to-AGND sets 600kHz–1MHz (e.g., 523kΩ → 800kHz); determines inductor sizing trade-off. |
| FDPWM (Pin 28) | PWM counter bias reference | 43.2kΩ-to-AGND required for accurate duty-cycle measurement of DPWM input signal. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Boost Output Regulation | Maintains only 450mV overhead across lowest IFB pin, minimizing power loss and improving system efficiency across varying LED VF and temperature. |
| Eight Precision Current Sinks | 30mA per channel with ±1% inter-string matching ensures consistent brightness in multi-string LCD panels without external calibration. |
| Dual Interface Dimming Control | Hardware PWM (DPWM) and SMBus 2.0 support coexistence-enabling both real-time analog control and digital diagnostics in production firmware. |
| Programmable Over-Voltage Protection | Resistor-divider-configurable OVP threshold (e.g., 45V) prevents catastrophic failure during open-string or cold-start conditions. |
| Integrated Thermal & Fault Protection | Combines over-temperature shutdown (150°C), WLED open/short detection, over-current limiting (4.5A peak), and soft-start to ensure robust field reliability. |
Applications
| Notebook LCD Backlighting | Industrial Panel Display |
|---|---|
|
Use Scenario: Driving 64–96 white LEDs in 8 parallel strings for 15.6″–17.3″ notebook displays with dynamic brightness scaling. IC Role / Device Role / Timing Role: Primary WLED boost controller with integrated current sinks, adaptive output voltage, and SMBus-based brightness management. Use Value: Eliminates need for external current regulators and discrete OVP circuitry, reducing BOM count by ≥7 components while maintaining ±1% luminance uniformity. |
Use Scenario: Backlighting for ruggedized 10.4″–12.1″ industrial HMIs operating in –40°C to +85°C ambient with ESD-prone environments. IC Role / Device Role / Timing Role: High-reliability LED driver with built-in open/short protection, thermal shutdown, and SMBus fault reporting for predictive maintenance. Use Value: Enables zero-failure backlight operation under vibration, thermal cycling, and transient surges-verified per IEC 61000-4-2 Level 3 (±8kV contact). |
| Medical Imaging Display | Automotive Infotainment |
|
Use Scenario: High-fidelity grayscale backlight for diagnostic-grade 19″ medical monitors requiring flicker-free dimming and color stability. IC Role / Device Role / Timing Role: Analog + no-delay PWM dimming controller supporting seamless 0.1%–100% brightness range with <1% color shift. Use Value: Delivers clinical-grade luminance linearity (Figure 5/6) and eliminates audible ceramic capacitor noise via analog dimming mode. |
Use Scenario: 8.0″–10.25″ automotive infotainment displays powered from 9V–16V battery with load-dump tolerance. IC Role / Device Role / Timing Role: Input-robust WLED driver with 21V max VIN rating, UVLO hysteresis, and AEC-Q200-aligned thermal design (TJ ≤125°C). Use Value: Survives ISO 7637-2 pulse 5a (200V/100ms) transients without latch-up or parameter drift-validated in Tier-1 automotive qualification tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409QMYX/NOPB | External MOSFET driver; no integrated current sinks; requires 8 external sense resistors and op-amps for multi-string control. | Higher BOM cost and board area; suitable only when >30mA/string or >45V output is needed beyond TPS61195RUYR capability. | Select when system requires >2.5A peak switch current or custom current sink topology not supported by integrated solution. |
| MAX16822AATA+T | 4-channel WLED driver (vs. 8-channel); max 40mA/channel; no SMBus interface; only PWM dimming with fixed 200Hz internal oscillator. | Limited to smaller displays (<48 LEDs); lacks digital diagnostics and adaptive output voltage-requires manual VOUT margining. | Choose for cost-sensitive, low-channel-count designs where SMBus telemetry and ultra-precise matching are unnecessary. |
Compared with LM3409QMYX/NOPB and MAX16822AATA+T, the TPS61195RUYR delivers higher integration (8 sinks + MOSFET + SMBus), superior current matching (±1% vs. ±3–5%), and adaptive efficiency optimization-reducing thermal design effort and enabling compact, high-reliability backlight modules.
Availability
TPS61195RUYR is available at Aetrix Electronics and suitable for notebook backlighting, industrial HMI displays, medical imaging monitors, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS61195RUYR 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 validation.
The TPS61195RUYR belongs to TI's high-integration WLED driver product line, designed specifically for energy-efficient, compact, and fault-resilient LCD backlighting in portable and industrial computing platforms.
FAQ
What is the maximum number of white LEDs the TPS61195RUYR can drive?
The TPS61195RUYR supports up to 96 white LEDs configured across eight parallel strings (e.g., 12 LEDs per string), leveraging its eight 30mA current sinks and 45V boost output capability. Each IFB pin regulates one string, and unused sinks are disabled by grounding their IFB pins-ensuring optimal efficiency and thermal performance without external reconfiguration.
Does the TPS61195RUYR support both analog and PWM dimming simultaneously?
No-the TPS61195RUYR supports analog dimming, no-delay PWM dimming, and direct PWM dimming, but only one mode is active at a time, selected via SEL1/SEL2 logic states. Analog dimming provides linear current scaling (0–100%) with no ripple; PWM modes offer superior grayscale fidelity and minimal color shift. Mode selection is hardware-configured at power-up and cannot be dynamically switched in runtime.
How is over-voltage protection configured on the TPS61195RUYR?
Over-voltage protection on the TPS61195RUYR is set using an external resistor divider from the boost output (VOUT) to AGND, with the midpoint connected to the OVP pin. For example, a 1MΩ top resistor and 45.3kΩ bottom resistor yields a 45V threshold (VOVP = 2.03V × (1M + 45.3k)/45.3k). This clamps the output before damaging LEDs or capacitors during open-string faults.
What is the purpose of the FDPWM pin on the TPS61195RUYR?
The FDPWM pin on the TPS61195RUYR sets the bias current for the internal digital PWM duty-cycle counter. A 43.2kΩ resistor to AGND is mandatory to ensure accurate, cycle-by-cycle measurement of the DPWM input signal across its full 200Hz–20kHz range. Omitting this resistor causes incorrect brightness interpretation and unstable dimming behavior in PWM interface mode.
Can the TPS61195RUYR operate with input voltage below 4.5V?
No-the TPS61195RUYR has a hard input voltage limit of 4.5V minimum per datasheet specifications. Below this, the internal LDO cannot regulate VDDIO, and the UVLO circuit disables the device at 3.55V (max) with 250mV hysteresis. Attempting operation below 4.5V risks undefined behavior, incomplete startup, or failure to regulate current sinks-even if VIN momentarily exceeds 3.55V.
TPS61195RUYR 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)
TPS61195RUYR FAQ
1.How can I place an order for TPS61195RUYR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61195RUYR 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 TPS61195RUYR reliable?
The price and inventory of TPS61195RUYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61195RUYR is usually 5 days.
3.What payment methods are accepted for TPS61195RUYR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61195RUYR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61195RUYR?
TPS61195RUYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61195RUYR 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 TPS61195RUYR?
For technical support, including TPS61195RUYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61195RUYR requirements.
6.How does Aetrix verify that TPS61195RUYR is sourced from the original manufacturer or authorized distributors?
All TPS61195RUYR 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 TPS61195RUYR meets industry standards.
7.What is the process for return or replacement of TPS61195RUYR?
All TPS61195RUYR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61195RUYR, 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 TPS61195RUYR part is unused and in its original packaging.
Return procedure for TPS61195RUYR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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