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Texas Instruments TPS611781RNWR
- Part No.:
- TPS611781RNWR
- Manufacturer:
- Texas Instruments
- Package:
- 13-PowerVFQFN
- Datasheet:
-
TPS611781RNWR.pdf
- Description:
- IC REG BOOST ADJ 10A 13VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,859
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Product details
Overview
TPS611781RNWR from Texas Instruments is a 20-V, 10-A fully-integrated synchronous boost converter with forced PWM mode operation, integrated 16-mΩ high- and low-side FETs, and gate driver for external load disconnect FET. It delivers up to 20 V output from 2.7–20 V input, supports adjustable switching frequency up to 2.2 MHz, and targets high-current portable power rails such as USB Type-C PD and motor drivers.
For engineers reviewing the TPS611781RNWR datasheet, TPS611781RNWR pinout, TPS611781RNWR application, or TPS611781RNWR equivalent, key selection considerations include its forced PWM light-load behavior (vs. auto PFM in TPS61178), 13-pin VQFN thermal performance, peak current limit programmability via ILIMIT pin, and DISDRV-driven external PFET control for true output isolation.
Technical Context
The TPS611781RNWR employs fixed-frequency peak current mode control with integrated slope compensation, enabling stable operation at duty cycles >50% and fast line/load transient response. Its forced PWM mode eliminates light-load frequency modulation, reducing EMI sensitivity in noise-critical audio and display applications.
It integrates dual 16-mΩ power FETs, a bootstrap regulator (BST/SW), internal 1.198-V reference (FB), and dedicated pins for external loop compensation (COMP), current limit programming (ILIMIT), and clock synchronization (FREQ/SYNC). Thermal protection triggers at 150°C junction temperature with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 20 V - supports single-cell Li-ion to multi-cell battery and industrial 12-V rail inputs. |
| Output Voltage Range | 4.5 V to 20 V - programmable via FB resistor divider; enables USB PD 5–20 V profiles and amplifier supplies. |
| Switch Peak Current Limit | Up to 10 A - set by ILIMIT-to-AGND resistor; TPS611781 variant yields ~7.4 A typical at RLIMIT = 80.6 kΩ. |
| Switching Frequency | 200 kHz to 2.2 MHz - adjustable via RFREQ resistor or external SYNC clock; enables compact magnetics and EMI shaping. |
| Efficiency | Up to 96% - measured at VIN = 7.2 V, VOUT = 16 V, IOUT = 2 A; reflects low RDS(on) FETs and optimized gate drive. |
| Package | 3.0 mm × 3.5 mm 13-pin VQFN HotRod - enhanced thermal dissipation (RθJA = 60.2°C/W) for high-power density layouts. |
| Protection Features | Hiccup short protection (20 A threshold), OVP (21 V), thermal shutdown (150°C), and UVLO (2.7 V rising). |
Pinout & Package
TPS611781RNWR is housed in a thermally enhanced 3.0-mm × 3.5-mm, 13-pin VQFN (RNW) package with exposed thermal pad. Pin 1 is marked by a dot; pin numbering follows standard QFN top-view counterclockwise convention starting from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FREQ / SYNC | Frequency control / sync input | Resistor sets oscillator frequency (200 kHz–2.2 MHz); accepts external clock signal for system-level timing alignment. |
| AGND | Analog ground | Reference for FB, COMP, ILIMIT, and FREQ/SYNC; must connect to PGND at single point to minimize noise coupling. |
| ILIMIT | Current limit programming | Resistor to AGND sets peak switch current; TPS611781 yields ~0.8 A lower limit than TPS61178 at same resistance. |
| COMP | Error amplifier output | Connects external RC network to AGND for loop stability tuning; transconductance = 195 µS typical. |
| FB | Output voltage feedback | Senses resistive divider output; internal 1.198-V reference enables precise VOUT regulation across temperature. |
| PGND | Power ground | High-current return path for SW, VOUT, and DISDRV; separate from AGND to avoid ground bounce in switching node. |
| SW | Switching node | Drain of low-side FET and source of high-side FET; connects to inductor and BST capacitor; high dv/dt node. |
| VOUT | Boost output | Delivers regulated output; isolated from VIN during shutdown via external PFET driven by DISDRV. |
| DISDRV | Load disconnect gate driver | Sinks 55 µA typical to drive external PFET gate; enables full output disconnection for safety and sequencing. |
| VCC | Internal LDO output | 6-V regulated supply for internal circuitry; requires ≥1.0 µF ceramic capacitor to AGND for stability. |
| EN | Enable input | Logic-high (>1.2 V) enables device; logic-low (<0.4 V) forces shutdown with <6 µA quiescent current. |
| VIN | Input supply | Main power input (2.7–20 V); includes UVLO (2.7 V rising, 2.3 V falling) with 400-mV hysteresis. |
| BST | Bootstrap supply | Connects to SW via ≥0.1 µF ceramic capacitor; provides gate drive voltage for high-side FET. |
Key Features
| Feature | Design Value |
|---|---|
| Forced PWM mode | Eliminates variable-frequency PFM operation at light loads-ensures consistent EMI profile and avoids audible noise in speakers/displays. |
| Dual 16-mΩ integrated FETs | Reduces conduction loss and board area vs. discrete solutions; enables 10-A peak current without external switches. |
| External load disconnect control | DISDRV pin drives external PFET to fully isolate VOUT from VIN during fault or shutdown-critical for USB PD safety compliance. |
| Hiccup short protection | Enters 90-ms off-time cycle upon 20-A short or 30% VOUT drop-limits thermal stress and enables automatic recovery without host intervention. |
| Adjustable 200-kHz–2.2-MHz switching | Allows optimization of inductor size, efficiency, and EMI filtering; supports SYNC to master clock for multi-rail systems. |
Applications
| Portable Speaker Power | USB Type-C Power Delivery |
|---|---|
|
Use Scenario: Powers Class-D audio amplifier from single-cell Li-ion (3.0–4.2 V) to deliver 10–20 W into 4-Ω load. IC Role / Device Role / Timing Role: Synchronous boost converter with forced PWM ensures clean, low-noise 12–16 V rail; DISDRV isolates speaker during mute/shutdown. Use Value: Delivers 96% efficiency at 2 A, enabling >8-hour playback; hiccup protection prevents thermal damage during speaker short. |
Use Scenario: Generates programmable 5–20 V output for USB PD sink negotiation in portable monitors or docks. IC Role / Device Role / Timing Role: Primary DC-DC stage with FB-programmable VOUT and FREQ/SYNC for EMI-controlled burst-mode operation. Use Value: Supports full USB PD 3.0 voltage range with ±1% output accuracy; 2.2-MHz max frequency allows <1-µH inductors for ultra-thin designs. |
| Motor Driver Supply | LCD Source Driver Supply |
|
Use Scenario: Supplies 12–18 V to brushed DC or stepper motor driver ICs in handheld tools or robotics. IC Role / Device Role / Timing Role: High-current boost regulator with 10-A peak capability and hiccup protection against motor stall currents. Use Value: Handles 7.4-A continuous motor current with minimal thermal derating; ILIMIT pin enables current limiting matched to motor specs. |
Use Scenario: Provides stable 15–18 V bias for TFT-LCD source drivers in automotive infotainment displays. IC Role / Device Role / Timing Role: Noise-immune power rail with forced PWM mode preventing display flicker from PFM frequency variation. Use Value: Maintains <1% VOUT ripple under dynamic load; thermal shutdown (150°C) ensures reliability in sealed dashboard enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61178RNWR | Auto PFM light-load mode (vs. forced PWM); identical pinout, package, and core specs. | Better light-load efficiency but higher EMI risk in noise-sensitive audio/display systems. | Select TPS61178RNWR only when maximum partial-load efficiency outweighs EMI/audible noise concerns. |
| MP2451DT-LF-Z | Lower 2-A peak current, 36-V max input, no load disconnect driver, SOIC-8 package. | Suitable for lower-power 5–12 V rails where output isolation and >5-A capability are not required. | Choose MP2451DT-LF-Z for cost-sensitive, space-tolerant designs with ≤2-A output needs and no DISDRV requirement. |
Compared with TPS61178RNWR, the TPS611781RNWR trades light-load efficiency for EMI predictability and audio compatibility; versus MP2451DT-LF-Z, it delivers 5× higher current, integrated disconnect control, and 30% smaller footprint-justifying its use in high-density, high-reliability portable power systems.
Availability
TPS611781RNWR is available at Aetrix Electronics and suitable for USB Type-C PD adapters, portable speaker amplifiers, LCD source drivers, and motor driver power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS611781RNWR 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 over 90 years of innovation in high-reliability power conversion ICs.
The TPS61178x product line was designed specifically for high-current, wide-input portable power applications demanding integrated FETs, load disconnect, and robust protection-targeting USB PD, audio, and display markets.
FAQ
What is the key functional difference between TPS611781RNWR and TPS61178RNWR?
The TPS611781RNWR operates in forced PWM mode across all load conditions, eliminating frequency modulation at light loads to reduce EMI and audible noise. In contrast, the TPS61178RNWR uses auto PFM mode below ~200 mA, improving light-load efficiency but introducing variable switching frequency. Both share identical pinout, package, and core specifications including 10-A peak current and 20-V output capability.
How is the peak switch current limit set on the TPS611781RNWR?
The peak switch current limit on the TPS611781RNWR is programmed using an external resistor (RLIMIT) connected between the ILIMIT pin and AGND. For example, with RLIMIT = 80.6 kΩ, the typical peak current limit is 7.4 A. The relationship follows ILIMIT ≈ 745 / RLIMIT (kΩ), and the TPS611781RNWR yields ~0.8 A lower limit than TPS61178RNWR at the same resistor value due to internal calibration.
Does the TPS611781RNWR support external clock synchronization?
Yes, the TPS611781RNWR supports external clock synchronization via the FREQ / SYNC pin. An external clock signal between 200 kHz and 2.2 MHz can be applied to this pin to align the internal oscillator phase and frequency with a system master clock-reducing beat frequencies and simplifying EMI filter design in multi-converter systems.
What protection features does the TPS611781RNWR include?
The TPS611781RNWR includes hiccup-mode short-circuit protection (triggered at ~20 A or 30% VOUT drop), overvoltage protection (21 V), thermal shutdown (150°C rising, 130°C falling), and input UVLO (2.7 V rising with 400-mV hysteresis). These features operate autonomously without host intervention and enable automatic recovery after fault clearance.
Can the TPS611781RNWR drive an external PFET for load disconnect?
Yes, the TPS611781RNWR includes a dedicated DISDRV pin that sinks 55 µA typical to drive the gate of an external PFET. This enables full output isolation from the input during shutdown or fault conditions-meeting safety requirements for USB Type-C PD and portable equipment. A series RGATE and CGATE network controls turn-on/off timing per application needs.
TPS611781RNWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 13-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 4.5V
- Voltage - Output (Max):
- 20V
- Current - Output:
- 10A (Switch)
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 13-VQFN-HR (3x3.5)
TPS611781RNWR FAQ
1.How can I place an order for TPS611781RNWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS611781RNWR 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 TPS611781RNWR reliable?
The price and inventory of TPS611781RNWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS611781RNWR is usually 5 days.
3.What payment methods are accepted for TPS611781RNWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS611781RNWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS611781RNWR?
TPS611781RNWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS611781RNWR 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 TPS611781RNWR?
For technical support, including TPS611781RNWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS611781RNWR requirements.
6.How does Aetrix verify that TPS611781RNWR is sourced from the original manufacturer or authorized distributors?
All TPS611781RNWR 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 TPS611781RNWR meets industry standards.
7.What is the process for return or replacement of TPS611781RNWR?
All TPS611781RNWR units undergo pre-shipment inspection (PSI). If there is an issue with TPS611781RNWR, 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 TPS611781RNWR part is unused and in its original packaging.
Return procedure for TPS611781RNWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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