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Texas Instruments TPS61199PWP
- Part No.:
- TPS61199PWP
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS61199PWP.pdf
- Description:
- IC LED DRVR CTRLR PWM 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:368
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Product details
Overview
TPS61199 from Texas Instruments is a high-power, current-mode boost controller IC designed for LCD monitor and TV backlighting. It integrates eight independent LED current sinks, supports 8–30 V input, delivers up to 70 mA per string with 3% current matching, and enables adaptive output voltage regulation up to 60 V - used in large-format display backlight systems driving parallel LED strings.
For engineers reviewing the TPS61199 datasheet, TPS61199 pinout, TPS61199 application, or TPS61199 equivalent, key selection considerations include PWM dimming ratio (5000:1 at 200 Hz), programmable switching frequency (300–800 kHz), integrated MOSFET gate driver (GDRV), LED open/short protection architecture, and thermal shutdown behavior at 150°C junction temperature.
Technical Context
The TPS61199 implements a current-mode PWM-controlled boost topology with adaptive output voltage regulation: it dynamically adjusts the boost converter output to match the highest forward voltage among eight LED strings plus minimum IFB headroom, minimizing power loss. Its internal error amplifier drives the COMP pin, requiring external RC compensation for loop stability.
It features dual-level protection: primary overcurrent detection via ISNS pin (160 mV threshold) and secondary fault handling including programmable LED short-across (via FBP), open-string detection (IFBx < 0.3 V), OVP clamping (2.95 V on OVP pin), and thermal shutdown (150°C). PWM dimming operates from 100 Hz to 22 kHz with 1 µs minimum on-time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 8 V to 30 V - supports wide-range DC supplies common in display power rails, including 12 V and 24 V industrial bus inputs. |
| Max LED Current per String | 70 mA - enables driving high-brightness white LEDs in large LCD backlights without external current amplification. |
| Current Matching Accuracy | ±3% - ensures uniform luminance across eight parallel LED strings, critical for consistent backlight brightness and color uniformity. |
| PWM Dimming Ratio | 5000:1 at 200 Hz - achieves deep dimming for high-contrast displays while maintaining flicker-free operation. |
| Switching Frequency Range | 300 kHz to 800 kHz - set by external resistor on FSW pin; higher frequencies allow smaller magnetics and reduced EMI filtering footprint. |
| OVP Threshold | 2.95 V on OVP pin - corresponds to ~60 V output clamp when using R2=190 kΩ/R3=10 kΩ divider, protecting downstream components. |
| Junction Temp Shutdown | 150°C with ~15°C hysteresis - provides robust thermal protection during sustained high-current or poor PCB heat sinking conditions. |
Pinout & Package
The TPS61199PWP is packaged in a 20-pin HTSSOP (PWP) with PowerPAD™ thermally enhanced exposed pad, measuring 6.50 mm × 4.40 mm. The PowerPAD must be soldered to ground and connected via thermal vias for optimal power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 8–30 V DC input; powers internal LDO and boost stage; includes undervoltage lockout at 7 V. |
| VDD | Internal LDO output | Provides regulated 6 V (±0.3 V) for analog/digital circuitry; requires 2.2 µF bypass capacitor to GND. |
| EN | Enable control | Active-high logic input; device enabled when >2 V, disabled when <0.8 V; includes internal 400–1600 kΩ pulldown. |
| PWM | Brightness control | Accepts 100 Hz–22 kHz external PWM signal; controls LED on/off timing with 1 µs minimum pulse width. |
| ISET | Full-scale current reference | Outputs 1.229 V reference; sets LED current via external resistor (e.g., 40.2 kΩ → 70 mA per string). |
| IFB1–IFB8 | LED string current sense | Eight independent inputs; each sinks up to 70 mA; device disables unused pins when pulled below 0.3 V. |
| GDRV | MOSFET gate driver | Drives external N-channel switch (e.g., Si4480DY); 2 Ω source / 1.5 Ω sink impedance supports fast turn-on/off. |
| ISNS | Inductor current sense | Monitors peak switch current via sense resistor (R1 = 0.03 Ω); triggers overcurrent shutdown at 160 mV. |
| FSW | Frequency programming | Resistor-connected pin sets switching frequency: 160 kΩ → 500 kHz; formula Fs(kHz) = 80,000 / R7(kΩ). |
| OVP | Output overvoltage monitor | Resistor-divider feedback; clamps output when voltage exceeds programmed threshold (e.g., 60 V). |
| FBP | LED short-across protection | Programmable threshold (via R5 = 200 kΩ) detects excessive IFB voltage due to LED shorts. |
| COMP | Error amplifier output | Connects external RC network to stabilize boost control loop; directly drives internal PWM comparator. |
| GND | Power and signal reference | Common return path for all circuits; PowerPAD must be soldered to this node for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Boost Output Regulation | Automatically tracks highest LED string forward voltage + IFB headroom, reducing power loss and heat generation. |
| Eight Independent Current Sinks | Each regulates up to 70 mA with ±3% matching - eliminates need for external current-setting resistors per string. |
| Integrated Gate Driver | Capable of sourcing/sinking 20 mA with low impedance (1.5–2 Ω) - directly drives high-side N-MOSFETs like Si4480DY. |
| Programmable Protection Thresholds | OVP, LED short (FBP), and open-string detection are resistor-configurable - enables design flexibility across LED configurations. |
| Thermal Shutdown with Hysteresis | Shuts down at 150°C junction temp and restarts at ~135°C - prevents thermal runaway during overload or airflow failure. |
Applications
| Monitor LCD Backlight | LCD TV Backlight |
|---|---|
|
Use Scenario: Driving 6–8 parallel strings of 12–17 white LEDs in 24-inch to 32-inch desktop monitors. IC Role / Device Role / Timing Role: Acts as primary boost controller and current regulator, managing adaptive output voltage and synchronized PWM dimming. Use Value: Enables uniform brightness and deep dimming (5000:1) without visible flicker, meeting DisplayPort and HDMI timing compliance. |
Use Scenario: Powering large-area edge-lit or direct-lit LED backlights in 40–65-inch LCD TVs with >100 LEDs total. IC Role / Device Role / Timing Role: Functions as multi-string LED driver with real-time current matching and thermal-aware shutdown. Use Value: Maintains consistent luminance across panel while supporting local dimming zones via PWM synchronization. |
| Industrial Display Backlight | Medical Imaging Display |
|
Use Scenario: Backlighting ruggedized HMIs and control panels operating in extended temperature ranges (–40°C to +85°C). IC Role / Device Role / Timing Role: Provides stable current regulation and robust fault protection under variable input voltage and thermal stress. Use Value: Ensures uninterrupted operation and long-term reliability in fanless enclosures with limited heat dissipation. |
Use Scenario: Driving high-CRI, flicker-free backlights in diagnostic-grade medical monitors requiring precise grayscale rendering. IC Role / Device Role / Timing Role: Delivers ultra-stable current matching (<3%) and low-noise PWM dimming for clinical image fidelity. Use Value: Eliminates luminance variation that could mask subtle contrast differences in X-ray or MRI visualization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61198PWP | Same 20-pin HTSSOP package but supports only six LED strings and 65 mA max per string; lacks IFB7/IFB8 pins. | Suitable for mid-size displays with ≤6 LED strings; lower current capability reduces thermal load but limits scalability. | Select TPS61198PWP only when full eight-string support is unnecessary and BOM cost reduction is prioritized. |
| LM3409QMYX/NOPB | External-compensation buck-boost LED controller; no integrated current sinks; requires external MOSFET and sense resistors per string. | Offers greater topology flexibility (buck, boost, SEPIC) but increases component count and layout complexity for multi-string designs. | Choose LM3409QMYX/NOPB when system-level efficiency optimization or non-standard LED configurations demand discrete control. |
Compared with TPS61199, TPS61198PWP trades string count and current headroom for cost savings, while LM3409QMYX/NOPB shifts complexity to external components for broader topology support - neither offers identical integration level or eight-string 70-mA capability.
Availability
TPS61199 is available at Aetrix Electronics and suitable for LCD monitor backlighting, LCD TV backlighting, and industrial display lighting requiring stable component supply, long-term production continuity, and automotive-grade reliability validation.
Supply support for TPS61199 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 experience in display power solutions.
The TPS61199 belongs to TI's high-integration LED backlight driver product line, engineered specifically for large-format LCD displays requiring precision current matching, adaptive voltage regulation, and robust fault protection.
FAQ
What is the maximum number of LED strings supported by the TPS61199?
The TPS61199 supports up to eight independent LED strings via its IFB1–IFB8 pins. Each string can be driven with up to 70 mA, and current matching between strings is maintained within ±3%. Unused IFB pins must be shorted to GND to disable corresponding current sinks during startup.
How does the TPS61199 regulate output voltage adaptively?
The TPS61199 monitors all IFB pin voltages and regulates the boost output to match the highest forward voltage among active LED strings plus the minimum required headroom at the corresponding IFB pin. This minimizes power loss and improves efficiency compared to fixed-output boost designs.
What protection features are integrated into the TPS61199?
The TPS61199 integrates MOSFET overcurrent protection (via ISNS pin), LED open detection (IFBx < 0.3 V), LED short-across protection (programmable via FBP pin), output overvoltage clamping (OVP pin), IFB overvoltage shutdown (29.5 V threshold), and thermal shutdown at 150°C with ~15°C hysteresis.
Can the TPS61199 drive LED strings requiring more than 70 mA per string?
Yes - the TPS61199 allows paralleling two or more IFB pins (e.g., IFB1 + IFB2) to increase per-string current capacity beyond 70 mA. This configuration maintains current matching across combined sinks and is documented in TI's application notes for high-current LED applications.
What is the recommended external resistor value to set 500 kHz switching frequency on the TPS61199?
To configure the TPS61199 for 500 kHz switching frequency, connect a 160 kΩ resistor between the FSW pin and GND. The relationship follows Fs(kHz) = 80,000 / R7(kΩ), so R7 = 80,000 / 500 = 160 kΩ - matching the value shown in the typical application schematic (R7 = 160 kΩ).
TPS61199PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 8V
- Voltage - Supply (Max):
- 30V
- Voltage - Output:
- -
- Current - Output / Channel:
- 70mA
- Frequency:
- 500kHz ~ 800kHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS61199PWP FAQ
1.How can I place an order for TPS61199PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61199PWP 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 TPS61199PWP reliable?
The price and inventory of TPS61199PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61199PWP is usually 5 days.
3.What payment methods are accepted for TPS61199PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61199PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61199PWP?
TPS61199PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61199PWP 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 TPS61199PWP?
For technical support, including TPS61199PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61199PWP requirements.
6.How does Aetrix verify that TPS61199PWP is sourced from the original manufacturer or authorized distributors?
All TPS61199PWP 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 TPS61199PWP meets industry standards.
7.What is the process for return or replacement of TPS61199PWP?
All TPS61199PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS61199PWP, 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 TPS61199PWP part is unused and in its original packaging.
Return procedure for TPS61199PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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