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Texas Instruments TPS61141DRCRG4
- Part No.:
- TPS61141DRCRG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS61141DRCRG4.pdf
- Description:
- IC LED DRV RGLTR PWM 35MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,816
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Product details
Overview
TPS61141DRCRG4 from Texas Instruments is a dual-output boost regulator IC designed for clamshell phone displays, delivering independently controlled 22 V voltage output (OLED sub-display) and constant-current WLED backlight drive up to 27 V with 0.7-A integrated switch, 1.2-MHz PWM control for current mode, and PFM for voltage mode. It integrates power MOSFET and diode in a 10-pin 3×3 mm QFN package.
For engineers reviewing the TPS61141DRCRG4 datasheet, TPS61141DRCRG4 pinout, TPS61141DRCRG4 application, or TPS61141DRCRG4 equivalent, key selection criteria include its 22-V OVP threshold (vs. TPS61140's 28 V), dual-mode feedback selection (SELV/SELI), ISET-programmable current sink, VFB-programmable LDO output, and thermal-pad–enabled 125°C junction operation - all critical for compact, high-efficiency mobile display power design.
Technical Context
The TPS61141DRCRG4 uses a single-inductor dual-output architecture where one boost stage feeds both a low-dropout linear regulator (LDO) for VOUT and a low-side current sink for IOUT. Feedback selection is hardware-driven via SELV (voltage enable) and SELI (current enable), supporting three operating modes: VOUT-only (PFM), IOUT-only (1.2-MHz PWM), or both-on (PWM with dynamic feedback prioritization between V(IOUT)–VOUT and IFB).
Its internal 0.9-Ω rDS(on) N-channel MOSFET and built-in power diode eliminate external active components; soft-start sequencing (16-step current ramp, 64-clock timing) prevents inrush during startup and mode transitions; overvoltage protection triggers at 22 V (TPS61141-specific), while undervoltage lockout activates below 1.65 V with 70-mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6 V - supports single-cell Li-ion (3.0–4.2 V) and regulated 3.3/5 V rails without external pre-regulation. |
| Max Output Voltage (VOUT) | 22 V - OVP threshold specific to TPS61141 variant; enables safe biasing of OLED panels requiring ≤22 V supply. |
| Current Sink Accuracy | ±10% over temperature - achieved via 1.229 V reference at ISET pin and 900× KISET multiplier, enabling precise WLED brightness control. |
| Switching Frequency | 1.2 MHz (PWM mode) - enables use of small 10 µH inductors and 4.7 µF ceramic capacitors for space-constrained PCB layouts. |
| Efficiency | Up to 82% - measured at 3.6 V input, 15 V output, 20 mA load; higher than discrete solutions due to integrated FET/diode and optimized PFM/PWM hybrid control. |
| Thermal Shutdown | 160°C with 15°C hysteresis - protects against sustained overload or poor heatsinking; thermal pad must be soldered to ground plane for rated 125°C junction operation. |
| Soft Start Time | 40 ms enable delay + 64-clock-step current ramp - prevents input surge and ensures stable transition between OLED-only and OLED+WLED modes. |
Pinout & Package
TPS61141DRCRG4 is housed in a 10-pin, 3 mm × 3 mm QFN package with exposed thermal pad (pin 11). The thermal pad must be soldered to analog ground for thermal performance and EMI reduction; vias to inner ground planes are recommended.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | OLED supply output | LDO-regulated voltage output; disconnected from IOUT when SELV = L; requires external R1/R2 divider on VFB to set output voltage. |
| VFB (Pin 2) | Voltage feedback input | Senses LDO output via resistor divider; regulated to 1.229 V internal reference; sets VOUT = VFB × (R1+R2)/R2. |
| SELV (Pin 3) | Voltage output enable | Logic-high enables VOUT path; logic-low disables LDO and disconnects VOUT from IOUT; internal 700 kΩ pull-down ensures default-off state. |
| SELI (Pin 4) | Current output enable/dimming | Logic-high enables IOUT sink; PWM signal here provides linear brightness dimming up to 30 kHz; internal pull-down prevents floating. |
| VIN (Pin 5) | Main power input | Supplies boost converter and internal circuitry; UVLO activates below 1.65 V; must be decoupled with ≥4.7 µF ceramic capacitor near pin. |
| SW (Pin 6) | Boost switching node | Connects to inductor and internal MOSFET drain; high dv/dt node requiring tight layout and Kelvin connection to minimize ringing. |
| IOUT (Pin 7) | WLED anode connection | Boost output node feeding current sink; supplies both VOUT (via LDO) and IOUT (via sink); voltage follows higher of V(IOUT)–VOUT or IFB in both-on mode. |
| GND (Pin 8) | Power and signal ground | Common return for VIN, IOUT, VOUT, and internal circuits; must be low-impedance star point with input/output capacitors placed adjacent. |
| ISET (Pin 9) | Current programming input | Sets regulated sink current via external resistor: IOUT = (1.229 V / RSET) × KISET (typ. 900); tolerance directly impacts WLED current accuracy. |
| IFB (Pin 10) | Current feedback input | Regulated to 330 mV internal reference; used as feedback in IOUT-only or both-on mode when V(IOUT)–VOUT drops below 330 mV. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent outputs | Enables simultaneous OLED sub-display (VOUT) and WLED main-backlight (IOUT) drive from single inductor - reduces BOM count and board area by 30% vs. dual-IC solution. |
| Hardware-selectable control modes | SELV/SELI pins allow deterministic, glitch-free mode transitions (e.g., clamshell open → OLED+WLED; closed → OLED-only) without software intervention or timing-critical sequencing. |
| Integrated power train | 0.7-A N-channel MOSFET + built-in Schottky diode eliminates two external active components and associated layout complexity, improving reliability and reducing EMI sources. |
| Programmable overvoltage protection | TPS61141-specific 22 V OVP threshold matches 25-V-rated output capacitors, preventing overstress while avoiding premature shutdown during transient load steps. |
| Audio-noise–optimized PWM dimming | Supports >30 kHz dimming frequency (up to 33 kHz) to avoid audible coil/capacitor resonance; SELI-controlled sink discharges output cap only during ON-time, minimizing ripple-induced vibration. |
Applications
| Clamshell Mobile Phone Display Power | OLED Sub-Display Bias Supply |
|---|---|
|
Use Scenario: Dual-screen clamshell phones requiring independent power for main LCD backlight (WLED string) and secondary OLED status display. IC Role / Device Role / Timing Role: Single-inductor dual-output boost controller providing regulated 22 V for OLED and programmable constant current for 3–6 WLEDs. Use Value: Eliminates need for separate boost and LDO ICs; reduces component count by 40%, saves 25 mm² PCB area, and simplifies thermal management via shared inductor and thermal pad. |
Use Scenario: Low-power always-on OLED panel in smartphone flip covers or smartwatches needing stable, low-ripple bias voltage. IC Role / Device Role / Timing Role: LDO-based VOUT output operating in PFM mode for ultra-low quiescent current (2 mA) and high light-load efficiency (>75% at 2 mA). Use Value: Achieves <15 mVpp ripple at 20 mA load due to LDO's 20 dB PSRR at 20 kHz, ensuring flicker-free OLED operation without additional filtering. |
| WLED Backlight Driver for Portable LCDs | Compact Dual-Rail Display Power Module |
|
Use Scenario: Space-constrained portable devices (e.g., handheld medical monitors, industrial HMIs) using white LED backlights with analog or PWM dimming. IC Role / Device Role / Timing Role: Constant-current sink (IOUT) with 1.2-MHz PWM control and SELI-driven dimming up to 30 kHz, supporting 3–6 series WLEDs at up to 27 V. Use Value: Delivers ±10% current matching across LEDs without external current mirrors; 30 kHz dimming avoids audible noise while maintaining >95% linearity per Figure 12. |
Use Scenario: Embedded systems requiring isolated, independently adjustable dual-rail power (voltage + current) from a single 3.3/5 V source. IC Role / Device Role / Timing Role: Configurable dual-output regulator with hardware-selectable modes, soft-start sequencing, and thermal shutdown - suitable for custom display modules. Use Value: Enables rapid prototyping of display power stages with no firmware dependency; pin-compatible with TPS61140 for design reuse where 28 V OVP is acceptable. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output display power applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61140DRCR | 28 V OVP threshold; identical pinout, package, and functional block diagram; same 1.229 V VFB and 330 mV IFB references. | Designed for systems using 30-V FETs or requiring higher headroom for aging WLED strings; not safe for 25-V output capacitors. | Select TPS61140DRCR when OVP margin >25 V is required; verify capacitor voltage rating and thermal derating at 125°C junction. |
| RT8535GQW | Single-output WLED driver only; no VOUT LDO path; 36 V max output; external MOSFET required; 500-kHz fixed-frequency PWM. | Cannot replace TPS61141DRCRG4 in dual-rail applications; suitable only for WLED-only designs with higher voltage or external switch needs. | Choose RT8535GQW only if VOUT functionality is unnecessary and higher WLED voltage (>27 V) or external FET control is required. |
Compared with TPS61141DRCRG4, TPS61140DRCR offers higher OVP headroom but risks capacitor overstress in 22–25 V designs, while RT8535GQW lacks voltage-output capability entirely - making TPS61141DRCRG4 the sole choice for integrated OLED+WLED power in space- and BOM-constrained clamshell phones.
Availability
TPS61141DRCRG4 is available at Aetrix Electronics and suitable for clamshell mobile displays, portable medical HMIs, and industrial OLED/WLED hybrid lighting systems requiring stable component supply, long-lifecycle support, and automotive-grade reliability screening.
Supply support for TPS61141DRCRG4 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 ICs, with decades of expertise in high-efficiency DC/DC conversion and display power solutions.
The TPS6114x family was engineered specifically for dual-rail mobile display power - integrating boost, LDO, and current sink functions to replace three discrete ICs in clamshell and slider phone architectures.
FAQ
What is the overvoltage protection (OVP) threshold for TPS61141DRCRG4?
The TPS61141DRCRG4 has a fixed 22 V overvoltage protection threshold, as specified in the Electrical Characteristics table. This value is device-variant specific and differs from the 28 V OVP of the TPS61140. The OVP circuit disables the boost switch immediately upon detecting IOUT voltage exceeding 22 V, protecting downstream 25-V-rated capacitors and the internal 30-V MOSFET. Recovery occurs automatically when voltage falls below the hysteresis level of 440 mV.
How does TPS61141DRCRG4 handle simultaneous OLED and WLED operation?
In both-on mode (SELV = H, SELI = H), the TPS61141DRCRG4 dynamically selects feedback between V(IOUT)–VOUT and IFB to regulate the boost output at the higher required voltage. If OLED regulation demands more headroom, V(IOUT)–VOUT is used; if WLED current regulation dominates, IFB becomes the feedback source. This ensures minimal power loss across the LDO and current sink while maintaining stability - critical for efficient dual-rail operation in clamshell phones.
Can TPS61141DRCRG4 drive six-series WLEDs at 23 V?
Yes - the TPS61141DRCRG4 supports up to 27 V output, sufficient for six-series WLEDs with typical forward voltage of ~3.8 V each (22.8 V total). Figure 6 in the datasheet confirms >75% efficiency at 23 V, 20 mA with 3.6 V input. Ensure the ISET resistor is selected to deliver target current (e.g., 20 mA), and verify thermal performance: at full load, junction temperature must stay ≤125°C with proper thermal pad soldering and PCB copper area.
What is the purpose of the IFB pin on TPS61141DRCRG4?
The IFB pin on TPS61141DRCRG4 serves as the feedback input for the current sink regulation loop. It is internally regulated to 330 mV, and the external current-sense resistor (connected between IFB and GND) sets the sink current magnitude. During IOUT-only or both-on operation, the boost converter adjusts its output to maintain 330 mV at IFB - ensuring accurate, temperature-stable WLED current control independent of input voltage or LED VF drift.
Does TPS61141DRCRG4 require external compensation components?
No - the TPS61141DRCRG4 features fully internal compensation optimized for the standard 10 µH inductor and 4.7 µF input/output capacitor values shown in the Typical Application schematic. No external RC networks or compensation pins are provided. Stability is maintained across all operating modes (PFM, PWM, both-on) and load ranges (2 mA to 35 mA) without user adjustment, simplifying design and reducing bill-of-materials.
TPS61141DRCRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 6V
- Voltage - Output:
- 27V
- Current - Output / Channel:
- 35mA
- Frequency:
- 1.2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS61141DRCRG4 FAQ
1.How can I place an order for TPS61141DRCRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61141DRCRG4 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 TPS61141DRCRG4 reliable?
The price and inventory of TPS61141DRCRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61141DRCRG4 is usually 5 days.
3.What payment methods are accepted for TPS61141DRCRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61141DRCRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61141DRCRG4?
TPS61141DRCRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61141DRCRG4 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 TPS61141DRCRG4?
For technical support, including TPS61141DRCRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61141DRCRG4 requirements.
6.How does Aetrix verify that TPS61141DRCRG4 is sourced from the original manufacturer or authorized distributors?
All TPS61141DRCRG4 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 TPS61141DRCRG4 meets industry standards.
7.What is the process for return or replacement of TPS61141DRCRG4?
All TPS61141DRCRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61141DRCRG4, 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 TPS61141DRCRG4 part is unused and in its original packaging.
Return procedure for TPS61141DRCRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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