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Texas Instruments TPS61150DRCT
- Part No.:
- TPS61150DRCT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS61150DRCT.pdf
- Description:
- IC LED DRV RGLTR PWM 35MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:409
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Product details
Overview
TPS61150DRCT from Texas Instruments is a dual-output, single-inductor boost WLED driver IC for portable display backlighting. It operates from 2.5 V to 6 V input, delivers up to 27 V output per channel, integrates a 0.7-A N-channel MOSFET and built-in power diode, and supports independent PWM or analog dimming of two WLED strings - ideal for clamshell phone sub/main displays.
For engineers reviewing the TPS61150DRCT datasheet, TPS61150DRCT pinout, TPS61150DRCT application, or TPS61150DRCT equivalent, key selection criteria include its 28-V overvoltage protection threshold, 1.2-MHz fixed-frequency PWM control, dual IFB current-sense regulation architecture, thermal shutdown at 160°C, and VSON-10 (3 mm × 3 mm) package with exposed thermal pad.
Technical Context
The TPS61150DRCT uses a current-mode PWM boost controller with adaptive feedback headroom: it dynamically regulates the higher-voltage IFB pin (IFB1 or IFB2) to 330 mV while maintaining sufficient voltage headroom across both low-side current sinks. Its 1.2-MHz switching frequency enables compact 10-μH inductor and 1-μF capacitor designs while avoiding audible noise.
Each output is independently enabled via SEL1/SEL2 logic inputs, supports soft-start (16-step ramp, 64-clock intervals), and features integrated undervoltage lockout (1.8 V typ.) and overvoltage protection (28 V typ.). The device shuts down consuming <1.5 μA when both SEL pins are held low >40 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6 V - compatible with single-cell Li-ion battery operation without external LDO pre-regulation. |
| Max Output Voltage | 28 V - matches 25-V-rated output capacitors and protects internal 30-V FET during open-string fault conditions. |
| Switch Current Limit | 0.7 A - sets maximum inductor peak current; enables ≥35 mA per string at typical efficiency and VIN ≥3.6 V. |
| Switching Frequency | 1.2 MHz - allows use of small 10-μH shielded inductors and reduces EMI filter size vs. lower-frequency boosters. |
| Current Regulation Accuracy | ±6% matching between outputs - ensures consistent brightness across dual WLED strings without external calibration. |
| Quiescent Current | 2 mA - minimizes standby power draw in always-on display subsystems. |
| Thermal Shutdown | 160°C with 15°C hysteresis - prevents permanent damage during sustained high-power or poor PCB thermal design. |
Pinout & Package
VSON-10 (DRC) package: 3.00 mm × 3.00 mm body with exposed thermal pad soldered to analog ground plane for optimal power dissipation (RθJB = 19.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10 IFB1, IFB2 | Current-sense feedback inputs | Low-side current sink regulation nodes; each regulated to 330 mV ±30 mV; disabling either opens its LED string path. |
| 2, 9 ISET1, ISET2 | Output current programming inputs | Analog voltage inputs (1.229 V typ.) setting output current via external resistor: IOUT = (1.229 V / RSET) × KISET (K ≈ 900). |
| 3, 4 SEL1, SEL2 | Digital enable/dimming inputs | CMOS-compatible logic inputs controlling on/off state or PWM dimming; internal 300–700 kΩ pulldown resistors prevent floating. |
| 5 VIN | Main power input | Supplies boost stage and internal circuitry; UVLO disables device below 1.8 V (typ.) with 70-mV hysteresis. |
| 6 SW | Boost switch node | Drives external 10-μH inductor; connects to internal 0.7-A N-FET and built-in Schottky diode anode. |
| 7 IOUT | Boost output / LED anode supply | Single high-voltage rail supplying both WLED strings; voltage dynamically adjusted to satisfy higher IFB headroom requirement. |
| 8 GND | Power and signal ground | Return path for input/output capacitors, current sinks, and internal circuitry; must be low-impedance connection to thermal pad. |
| - Exposed Pad | Thermal interface | Electrically connected to GND; requires soldering and thermal vias to inner ground plane for reliable 125°C junction operation. |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor dual-output topology | Reduces BOM count and PCB area by eliminating second inductor; enables compact 3 mm × 3 mm solution for space-constrained clamshell phones. |
| Adaptive IFB regulation | Automatically selects higher-voltage IFB pin for feedback, allowing mismatched WLED string voltages (e.g., 5-LED + 7-LED) without external balancing components. |
| PWM dimming with disabled soft start | Eliminates current-sink ramp delay during dimming, enabling linear 20–30 kHz PWM control and preventing visible flicker or brightness nonlinearity. |
| Built-in OVP (28 V) and UVLO (1.8 V) | Protects against open-circuit LED faults and brownout conditions without external supervision circuitry - critical for battery-powered reliability. |
| Integrated 0.7-A switch + diode | Removes need for external power MOSFET and Schottky diode, simplifying layout and improving efficiency over discrete boost-WLED solutions. |
Applications
| Sub- and Main-Display Backlight | Display and Keypad Backlight |
|---|---|
Use Scenario: Dual-screen clamshell mobile phone requiring independent brightness control for primary and secondary displays. IC Role / Device Role / Timing Role: TPS61150DRCT acts as dual-channel constant-current WLED driver with shared boost converter, regulating two independent LED strings using IFB1/IFB2 feedback and SEL1/SEL2 PWM enable signals. Use Value: Enables simultaneous yet independent dimming of sub/main displays using one IC, reducing component count versus two single-channel drivers and minimizing PCB footprint. | Use Scenario: Feature phone with main LCD display and illuminated keypad requiring coordinated but separate brightness adjustment. IC Role / Device Role / Timing Role: TPS61150DRCT supplies regulated current to display LEDs via IOUT and IFB1, while driving keypad LEDs through IFB2 - both powered from same boost rail. Use Value: Eliminates need for separate boost converters or current regulators, lowering system cost and power conversion losses compared to discrete solutions. |
| Up to 14-WLED Driver | Compact Portable Display Power |
Use Scenario: Single large-format display (e.g., smartwatch or handheld terminal) requiring high total LED current across multiple parallel strings. IC Role / Device Role / Timing Role: TPS61150DRCT configures both outputs in parallel mode (SEL1 = SEL2 = HIGH), driving up to 7 WLEDs per string for 14 total, with current set by ISET1/ISET2 resistors. Use Value: Delivers up to 70 mA total LED current from a single 3 mm × 3 mm IC, achieving higher integration density than dual-single-channel alternatives. | Use Scenario: Space-constrained portable electronics (e.g., barcode scanner, medical handheld) needing minimal external components for WLED backlighting. IC Role / Device Role / Timing Role: TPS61150DRCT integrates switch, diode, current sinks, and control logic - requiring only one inductor, two resistors, and two capacitors for full operation. Use Value: Reduces bill-of-materials to just five passive components, accelerating design cycle and improving long-term supply chain stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61151DRCT | Lower 22-V OVP threshold; identical pinout, package, and functional architecture. | Suitable where output voltage ≤22 V suffices (e.g., shorter LED strings); avoids overdesigning capacitor voltage rating. | Select TPS61151DRCT when system-level OVP margin allows 22 V, reducing risk of false OVP trips in marginal forward-voltage conditions. |
| LM3409QMH/NOPB | Single-channel, external-FET LED driver with adjustable frequency; no integrated diode or dual-current capability. | Requires external MOSFET, diode, and second channel IC for dual-string operation - larger solution size and higher BOM cost. | Choose LM3409QMH/NOPB only if higher output voltage (>28 V), programmable frequency, or external FET thermal management is required. |
Compared with TPS61151DRCT, the TPS61150DRCT provides higher OVP headroom (28 V vs. 22 V) for robustness with aging or temperature-varying WLEDs; compared with LM3409QMH/NOPB, it delivers dual-channel integration, smaller footprint, and lower system-level component count - making it optimal for compact dual-backlight designs.
Availability
TPS61150DRCT is available at Aetrix Electronics and suitable for clamshell phone displays, portable medical device backlights, and industrial handheld HMI panels requiring stable component supply, long-lifecycle support, and automotive-grade reliability validation.
Supply support for TPS61150DRCT 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 portable power conversion and LED lighting control.
The TPS6115x product line was designed specifically for space-constrained, battery-powered dual-display devices - delivering high-efficiency WLED backlighting with minimal external components and robust fault protection.
FAQ
What is the overvoltage protection threshold of the TPS61150DRCT?
The TPS61150DRCT has a fixed overvoltage protection (OVP) threshold of 28 V, as specified in the device comparison tables and electrical characteristics section. This threshold protects the internal 30-V MOSFET and allows use of standard 25-V output capacitors. The OVP hysteresis is 550 mV, ensuring stable recovery after fault clearance. This value distinguishes TPS61150DRCT from the pin-compatible TPS61151DRCT, which has a 22-V OVP threshold.
Can the TPS61150DRCT drive two WLED strings with different forward voltages?
Yes, the TPS61150DRCT supports mismatched WLED strings via its adaptive IFB regulation architecture. It dynamically monitors both IFB1 and IFB2 voltages and regulates the higher-voltage string to maintain 330 mV, while the lower-voltage string receives sufficient headroom passively. This eliminates need for external balancing components and enables configurations like 5-LED + 7-LED strings - confirmed in Section 9.1 and Figure 17 of the SLVS625E datasheet.
What is the maximum PWM dimming frequency supported by the TPS61150DRCT?
The TPS61150DRCT supports PWM dimming up to 30 kHz, with linearity verified at 20 kHz and 30 kHz in Figure 4 of the datasheet. Its current-sink settling time (Tisink) is 6 μs, enabling theoretical maximum frequencies above 33 kHz for 20% minimum duty cycle. The device disables soft start during PWM operation to ensure fast current transitions and avoid brightness nonlinearity - a key feature documented in Section 9.2.2.2.
Does the TPS61150DRCT require an external Schottky diode?
No, the TPS61150DRCT integrates a power diode internally, as explicitly stated in the Features list ("Built-In Power Diode") and Functional Block Diagram. This eliminates the need for an external Schottky diode, reducing BOM count, PCB area, and potential layout errors. The diode's forward voltage is specified as 0.83–1.0 V at 0.7 A in Section 7.5, confirming its inclusion in the monolithic IC die.
How does the TPS61150DRCT handle thermal overload conditions?
The TPS61150DRCT incorporates internal thermal shutdown that activates at a typical junction temperature of 160°C, with 15°C hysteresis (Section 7.5). When triggered, the device disables both the boost converter and current sinks, reducing power dissipation until temperature falls below 145°C. This protection is independent of ambient conditions and relies on on-die thermal sensing - ensuring reliability even under sustained high-current or poor heatsinking scenarios.
TPS61150DRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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)
TPS61150DRCT FAQ
1.How can I place an order for TPS61150DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61150DRCT 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 TPS61150DRCT reliable?
The price and inventory of TPS61150DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61150DRCT is usually 5 days.
3.What payment methods are accepted for TPS61150DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61150DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61150DRCT?
TPS61150DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61150DRCT 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 TPS61150DRCT?
For technical support, including TPS61150DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61150DRCT requirements.
6.How does Aetrix verify that TPS61150DRCT is sourced from the original manufacturer or authorized distributors?
All TPS61150DRCT 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 TPS61150DRCT meets industry standards.
7.What is the process for return or replacement of TPS61150DRCT?
All TPS61150DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61150DRCT, 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 TPS61150DRCT part is unused and in its original packaging.
Return procedure for TPS61150DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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