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Texas Instruments TPS61193PWPR
- Part No.:
- TPS61193PWPR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS61193PWPR.pdf
- Description:
- IC LED DRVR RGLTR PWM 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,048
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Product details
Overview
TPS61193 from Texas Instruments is a high-efficiency, integrated three-channel LED driver IC with boost/SEPIC DC-DC converter, precision current sinks (±5% accuracy, 1% typical matching), 4.5 V to 40 V input range, and 45 V max output voltage - designed for industrial LCD backlight systems requiring stable brightness control and fault resilience.
For engineers reviewing the TPS61193 datasheet, TPS61193 pinout, TPS61193 application, or TPS61193 equivalent, key selection considerations include adaptive output voltage control, 10,000:1 PWM dimming ratio at 100 Hz, open/short LED fault detection, thermal shutdown, and HTSSOP-20 package compatibility with exposed thermal pad for thermal management.
Technical Context
The TPS61193 integrates a current-mode boost/SEPIC controller with adaptive output voltage regulation based on real-time LED string headroom monitoring - minimizing power loss by dynamically adjusting VOUT to the lowest sufficient level. Its switching frequency (300 kHz–2.2 MHz) is set via RFSET resistor or external SYNC signal, with optional spread-spectrum modulation for EMI reduction.
Three independent analog current sinks (OUT1–OUT3) support up to 100 mA per channel with 1% typical matching and <0.7 V saturation voltage at full load. Fault detection includes VIN OVP/UVLO, LED open/short sensing, and thermal shutdown (165°C trip, 20°C hysteresis), all reported via open-drain FAULT pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 40 V - supports wide industrial supply rails including unregulated 12 V/24 V bus and battery inputs. |
| LED Current Accuracy | ±5% - ensures consistent luminance across channels without per-channel calibration. |
| Current Matching | 1% typical - minimizes brightness variation between parallel LED strings in multi-zone backlighting. |
| PWM Dimming Ratio | 10,000:1 at 100 Hz - enables smooth, flicker-free brightness control down to 0.01% duty cycle. |
| DC-DC Output Voltage | Up to 45 V - sufficient for driving 10+ white LEDs in series (VF ≈ 3.2 V each) with margin. |
| Switching Frequency Range | 300 kHz to 2.2 MHz - allows layout optimization: lower frequencies improve efficiency; higher frequencies reduce passive size. |
| Fault Detection | Open/short LED, VIN OVP (42 V typ), UVLO (4 V), thermal shutdown (165°C) - enables robust system-level safety without external supervision. |
Pinout & Package
TPS61193 is housed in a thermally enhanced HTSSOP-20 package (6.50 mm × 4.40 mm) with exposed thermal pad (EP) for efficient heat dissipation in high-current LED applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 20) | Power input | Dual-input configuration supports high-current routing and reduces trace resistance; accepts 4.5–40 V. |
| OUT1/OUT2/OUT3 (Pins 15, 14, 13) | LED current sink outputs | Each delivers up to 100 mA constant current; unused pins must be grounded to disable and exclude from adaptive voltage loop. |
| ISET (Pin 10) | Current programming reference | Resistor-to-ground sets full-scale LED current (e.g., 24 kΩ → ~100 mA); enables precise per-channel tuning. |
| FSET (Pin 3) | DC-DC frequency setting | Resistor-to-ground configures switching frequency (300 kHz–2.2 MHz); determines inductor/capacitor sizing and EMI profile. |
| FB (Pin 16) | Boost/SEPIC feedback | Resistive divider from VOUT sets maximum output voltage; adaptive control adjusts actual VOUT downward as needed. |
| SYNC (Pin 6) | External clock input | Accepts 300 kHz–2.2 MHz sync signal; disables spread spectrum when active - critical for noise-sensitive systems. |
| FAULT (Pin 5) | Open-drain fault indicator | Asserts low on any detected fault (LED open/short, OVP, thermal shutdown); requires external pull-up for system monitoring. |
| VDDIO/EN (Pin 4) | Enable + digital I/O supply | High-voltage enable (≥1.65 V) and local 3.3 V–5.25 V rail for PWM/SYNC logic - eliminates need for separate IO regulator. |
| PGND (Pin 17) | Power ground | Separate ground return for high-frequency switch node (SW) - isolates noise from analog/signal grounds (GND pins 9,11,12). |
| EP (Exposed Pad) | Thermal & electrical ground | Mandatory solder connection to PCB thermal plane; improves thermal resistance (RθJB = 22.4°C/W) and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Output Voltage Control | Real-time adjustment of VOUT to minimum required headroom across active LED strings - reduces power loss and heat generation by up to 30% vs fixed-output designs. |
| Integrated LDO (4.3 V) | Provides regulated supply for internal logic and digital I/Os - eliminates external bias rail and simplifies BOM for battery-powered or wide-input systems. |
| Spread Spectrum Modulation | ±3% frequency dithering at 1 kHz - lowers peak EMI emissions by 10–15 dB, easing compliance with CISPR-25 Class 5 in automotive displays. |
| Comprehensive Fault Coverage | Detects open/short LED strings, input overvoltage/undervoltage, and die overtemperature - enables fail-safe shutdown without host MCU intervention. |
| Minimal External Components | Requires only 1 inductor, 2 diodes, 4–6 capacitors, and 3 resistors - reduces board area and assembly cost versus discrete boost + current sink solutions. |
Applications
| Industrial Control Panel Backlighting | Test & Measurement Instrument Displays |
|---|---|
Use Scenario: Driving multi-zone LED backlights behind segmented LCDs in factory HMIs exposed to wide ambient temperatures (−40°C to +85°C) and electrical noise. IC Role / Device Role / Timing Role: Three-channel constant-current source with adaptive boost voltage and open-circuit LED fault detection - maintains uniform brightness while preventing thermal runaway during LED failure. Use Value: Eliminates need for external current sense amplifiers and discrete protection circuitry; 1% current matching ensures consistent color balance across display zones. | Use Scenario: Powering high-contrast, flicker-free LCD backlights in portable oscilloscopes and multimeters where battery life and EMI are critical. IC Role / Device Role / Timing Role: Integrated boost/SEPIC converter + PWM-dimmable current sinks - delivers stable 45 V output from 3.7 V Li-ion or 12 V bench supply with 10,000:1 dimming resolution. Use Value: Spread spectrum and SYNC pin allow EMI optimization in compact enclosures; thermal shutdown protects against overheating during extended bench use. |
| Industrial PC Front Panel Lighting | Medical Diagnostic Display Backlighting |
Use Scenario: Illuminating status LEDs and bezel indicators on ruggedized IPCs operating in dusty, vibration-prone environments with variable input voltage. IC Role / Device Role / Timing Role: High-voltage current sink driver with VIN OVP/UVLO and robust 40 V absolute max rating - tolerates load dump transients and brownouts common in vehicle-mounted IPCs. Use Value: Dual VIN pins and exposed thermal pad ensure reliable operation at 100 mA/channel under continuous 85°C ambient; fault pin enables predictive maintenance alerts. | Use Scenario: Providing certified, low-noise backlighting for diagnostic-grade medical monitors requiring Class II safety isolation and zero flicker. IC Role / Device Role / Timing Role: Precision current-regulated LED driver with 100 Hz PWM dimming and thermal derating - meets IEC 60601-1 creepage/clearance requirements via isolated boost topology. Use Value: Adaptive voltage control minimizes power dissipation in sealed enclosures; open/short LED detection satisfies fault-tolerant design requirements for life-critical displays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409HVMM/NOPB | Single-channel buck-boost LED driver; no integrated current sinks; requires external MOSFET and sense resistor. | Lacks multi-channel integration and adaptive voltage control; suited for high-power single-string designs. | Choose when >100 mA per string or external FET control is required; not drop-in for TPS61193's 3-channel architecture. |
| MAX16820ATL+ | Three-channel linear LED driver; no DC-DC converter; max 36 V input; limited to low-VF strings (<15 V total). | No boost capability; unsuitable for high-voltage LED strings; higher power loss at high currents. | Select only for low-input-voltage, low-string-voltage applications where simplicity outweighs efficiency; incompatible with 45 V VOUT requirement. |
Compared with LM3409HVMM/NOPB and MAX16820ATL+, the TPS61193 uniquely combines three precision current sinks, adaptive boost/SEPIC conversion, and comprehensive fault coverage in a single HTSSOP-20 package - enabling compact, efficient, and safety-certifiable backlight designs without external current sensing or protection components.
Availability
TPS61193 is available at Aetrix Electronics and suitable for industrial control panels, test and measurement equipment, and medical display backlighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS61193 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 high-reliability industrial and automotive power solutions.
The TPS61193 belongs to TI's high-performance LED driver product line, engineered specifically for demanding industrial backlight applications requiring precision current regulation, wide input range, and integrated fault protection - not general-purpose lighting or consumer displays.
FAQ
What is the maximum LED string voltage supported by the TPS61193?
The TPS61193 supports up to 45 V on its DC-DC output, verified by absolute maximum rating (VOUT ≤ 45 V) and recommended operating conditions (VOUT ≤ 40 V). This enables driving strings of up to 12–14 white LEDs (VF ≈ 3.2–3.5 V each) with sufficient headroom. The FB pin uses an external resistor divider to set the maximum output voltage, and adaptive control dynamically lowers it to match actual LED forward voltage requirements.
How does the TPS61193 achieve 10,000:1 PWM dimming ratio?
The TPS61193 achieves 10,000:1 dimming ratio at 100 Hz by supporting minimum PWM on/off times of 0.5 µs - allowing precise control down to 0.01% duty cycle. Its internal PWM interface directly replicates the input waveform without interpolation or delay, ensuring accurate brightness scaling across the full range. This specification is validated across −40°C to +125°C junction temperature.
Can unused current sink outputs (e.g., OUT2, OUT3) be left floating on the TPS61193?
No - unused current sink outputs (OUT1, OUT2, OUT3) must be connected to GND per datasheet Table 5-1. Floating outputs cause undefined behavior in the adaptive voltage control loop and may trigger false open-LED fault detection. Grounding disables the sink and excludes it from both voltage regulation and fault monitoring, ensuring stable operation of active channels.
What is the role of the exposed thermal pad (EP) on the TPS61193 HTSSOP-20 package?
The exposed thermal pad (EP) on the TPS61193 serves as both a low-thermal-resistance path to the PCB (RθJB = 22.4°C/W) and a functional ground connection for internal power circuits. It must be soldered to a dedicated copper pour tied to PGND/GND planes. Omitting EP connection degrades thermal performance by >30°C and risks thermal shutdown under full-load conditions.
Does the TPS61193 support synchronization with an external clock source?
Yes - the TPS61193 supports external clock synchronization via the SYNC pin (Pin 6), accepting frequencies from 300 kHz to 2.2 MHz. When enabled, the internal oscillator locks to the external signal, eliminating beat frequencies and enabling deterministic EMI filtering. Spread spectrum is automatically disabled during synchronization, and the device resumes spread-spectrum operation only if SYNC is held high after loss of external clock.
TPS61193PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- SEPIC, Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 3
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 45V
- Voltage - Output:
- 45V
- Current - Output / Channel:
- 100mA
- Frequency:
- 300kHz ~ 2.2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS61193PWPR FAQ
1.How can I place an order for TPS61193PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61193PWPR 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 TPS61193PWPR reliable?
The price and inventory of TPS61193PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61193PWPR is usually 5 days.
3.What payment methods are accepted for TPS61193PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61193PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61193PWPR?
TPS61193PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61193PWPR 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 TPS61193PWPR?
For technical support, including TPS61193PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61193PWPR requirements.
6.How does Aetrix verify that TPS61193PWPR is sourced from the original manufacturer or authorized distributors?
All TPS61193PWPR 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 TPS61193PWPR meets industry standards.
7.What is the process for return or replacement of TPS61193PWPR?
All TPS61193PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61193PWPR, 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 TPS61193PWPR part is unused and in its original packaging.
Return procedure for TPS61193PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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