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Texas Instruments TPS61150DRCRG4
- Part No.:
- TPS61150DRCRG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS61150DRCRG4.pdf
- Description:
- IC LED DRV RGLTR PWM 35MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,804
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Product details
Overview
TPS61150DRCRG4 from Texas Instruments is a dual-output, single-inductor boost WLED driver IC designed for independent current regulation of two white LED strings in portable displays. 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 PWM dimming up to 30 kHz - enabling sub- and main-display backlighting in clamshell phones.
For engineers reviewing the TPS61150DRCRG4 datasheet, TPS61150DRCRG4 pinout, TPS61150DRCRG4 application, or TPS61150DRCRG4 equivalent, key selection criteria include its 1.2-MHz fixed-frequency PWM control, dual independent ISET/IFB current programming, overvoltage protection (28 V), thermal shutdown (160°C), and VSON-10 (3 mm × 3 mm) package with exposed thermal pad for high-power-density LED driver designs.
Technical Context
The TPS61150DRCRG4 uses a current-mode PWM boost controller with adaptive feedback headroom: it dynamically regulates the higher-voltage IFB pin (IFB1 or IFB2) to maintain 330 mV ±30 mV while delivering up to 35 mA per string. Its 12-MHz internal clock drives 16-step soft start (64 cycles/step) and enables precise PWM dimming with disabled soft start during active modulation.
Overvoltage protection triggers at 28 V (typical) with 550 mV hysteresis, and undervoltage lockout activates below 1.65 V (typical) with 70 mV hysteresis. The device features integrated thermal shutdown (160°C, 15°C hysteresis), SEL-input logic with internal 300–700 kΩ pulldown resistors, and dual-mode enable: individual output control or full shutdown after 40 ms of both SEL pins low.
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. |
| Output Voltage per Channel | Up to 27 V - sufficient to drive 6–8 series WLEDs at typical forward voltage (3.2–3.5 V each). |
| Max Output Current per String | 35 mA - sets upper limit for brightness and thermal design; determined by current-sink capability, not just boost power. |
| Switching Frequency | 1.2 MHz (fixed) - enables use of small 10-μH inductors and reduces audible noise vs. PFM schemes. |
| OVP Threshold | 28 V (TPS61150 variant) - protects 25-V output capacitors and internal 30-V FET from overvoltage failure. |
| IFB Regulation Voltage | 330 mV (typical) - reference voltage for current-sink feedback loop; determines accuracy and matching of regulated LED current. |
| Thermal Shutdown | 160°C (typical) with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal layout. |
Pinout & Package
TPS61150DRCRG4 is housed in a 10-pin VSON package (3.00 mm × 3.00 mm) with an exposed thermal pad on the bottom for enhanced thermal dissipation. The package is RoHS-compliant and optimized for space-constrained portable display applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10 IFB1, IFB2 | Current feedback inputs | Return path for regulated LED current; sinking node held at 330 mV for precise current control; disabling either opens its LED string. |
| 2, 9 ISET1, ISET2 | Current programming inputs | Analog inputs setting output current via external resistor: IOUT = (1.229 V / RSET) × 900 (typical K-value). |
| 3, 4 SEL1, SEL2 | Output enable/dimming inputs | Logic-controlled pins enabling/disabling respective LED strings; support PWM dimming up to 30 kHz with soft-start disable for linearity. |
| 5 VIN | Main power input | Supplies boost converter and internal circuitry; UVLO disables device below 1.65 V to prevent erratic behavior. |
| 6 SW | Switching node | Drives external inductor; connects to internal 0.7-A N-channel MOSFET and built-in diode - no external switch/diode required. |
| 7 IOUT | Boost output | High-voltage output node supplying both LED strings; voltage adapts to highest-string forward drop plus 330 mV headroom. |
| 8 GND | Power ground | Common return for input/output capacitors and internal circuitry; must be connected near thermal pad for optimal EMI and thermal performance. |
| - Exposed Thermal Pad | Thermal & electrical ground | Must be soldered to PCB ground plane using thermal vias; critical for maintaining junction temperature ≤125°C at full load. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent current regulation | Enables asymmetric LED string configurations (e.g., 4-WLED + 2-WLED) without cross-coupling or efficiency penalty from mismatched forward voltages. |
| Single-inductor architecture | Reduces BOM count and board area versus dual-boost solutions; eliminates need for second inductor, diode, and associated layout complexity. |
| Built-in 0.7-A MOSFET + power diode | Removes requirement for external power components - simplifies design, improves reliability, and lowers system cost. |
| Adaptive IFB headroom control | Maintains only necessary voltage overhead (330 mV) across active current sink, minimizing power loss and maximizing efficiency in mismatched-string operation. |
| Integrated OVP (28 V) and thermal shutdown | Provides autonomous fault protection without external monitoring circuitry - essential for unattended portable display operation. |
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 LCD panels. IC Role / Device Role / Timing Role: TPS61150DRCRG4 acts as dual-channel constant-current WLED driver, regulating each display's LED string separately via SEL1/SEL2 and ISET1/ISET2. Use Value: Enables simultaneous but independent PWM dimming of both displays at up to 30 kHz, eliminating visible flicker while preserving battery life through efficient 1.2-MHz boost conversion. | Use Scenario: Feature phone with main LCD display and illuminated keypad requiring coordinated yet distinct lighting profiles. IC Role / Device Role / Timing Role: TPS61150DRCRG4 drives display LEDs on one channel and keypad LEDs on the other, using separate ISET resistors to set different current levels (e.g., 25 mA vs. 10 mA). Use Value: Eliminates need for two discrete drivers; single-inductor topology reduces solution size and component count while maintaining >83% peak efficiency across both loads. |
| Up to 14-WLED Driver | Compact Portable Display Power |
Use Scenario: Single large-format display (e.g., 7-inch industrial HMI) requiring uniform backlighting from multiple parallel LED strings. IC Role / Device Role / Timing Role: TPS61150DRCRG4 configures both outputs in parallel mode (SEL1=SEL2=high) to drive up to 14 WLEDs total - e.g., two 7-LED strings. Use Value: Achieves high lumen output with minimal footprint; built-in OVP (28 V) and thermal shutdown ensure robustness under varying ambient temperatures and LED aging effects. | Use Scenario: Space-constrained wearable or handheld device needing ultra-compact, high-efficiency LED backlight solution. IC Role / Device Role / Timing Role: TPS61150DRCRG4 serves as complete WLED power management IC - integrating switching regulator, current sinks, protection, and dimming interface in 3 mm × 3 mm VSON. Use Value: Reduces total solution volume by >40% vs. discrete boost + dual current sink; exposed thermal pad enables 19.2°C/W junction-to-board resistance for stable operation at 85°C ambient. |
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 |
|---|---|---|---|
| TPS61151DRCR | OVP threshold is 22 V (vs. 28 V); identical pinout, package, and functional block diagram. | Suitable for lower-output-voltage systems (e.g., ≤5-series WLEDs) where 25-V capacitors are not required. | Select TPS61151DRCR when output voltage headroom is constrained and 22-V OVP provides sufficient margin. |
| LM3409QMY/NOPB | Single-channel, external-FET LED driver with adjustable frequency (200 kHz–2 MHz); no integrated diode or dual outputs. | Requires external MOSFET, diode, and second channel IC for dual-string operation - larger BOM and layout area. | Choose LM3409QMY/NOPB only when higher output current (>35 mA), programmable frequency, or automotive AEC-Q100 qualification is required. |
Compared with TPS61150DRCRG4, TPS61151DRCR offers lower OVP protection suited for reduced-voltage LED strings, while LM3409QMY/NOPB provides greater flexibility and higher current but demands additional external components and doubles board area for dual-channel use.
Availability
TPS61150DRCRG4 is available at Aetrix Electronics and suitable for sub-display backlighting, keypad illumination, and compact portable display power applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS61150DRCRG4 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 company specializing in analog, embedded processing, and power management technologies, with leadership in high-efficiency DC/DC conversion and precision analog signal chains.
The TPS6115x product line was designed specifically for space- and power-constrained portable display backlighting, delivering dual independent WLED current regulation with minimal external components and industry-leading integration density.
FAQ
What is the overvoltage protection (OVP) threshold for TPS61150DRCRG4?
The TPS61150DRCRG4 has a fixed overvoltage protection threshold of 28 V (typical), with 550 mV hysteresis. This value is inherent to the TPS61150 variant and differs from the TPS61151's 22-V OVP. The protection circuit disables the boost switch when IOUT exceeds this threshold, preventing damage to the internal 30-V MOSFET and external 25-V output capacitors. The TPS61150DRCRG4 resumes normal operation once the output voltage falls below 27.45 V.
How does TPS61150DRCRG4 regulate current for two LED strings with different forward voltages?
The TPS61150DRCRG4 uses adaptive feedback headroom control: it dynamically regulates the IFB pin with the higher voltage drop (IFB1 or IFB2) to maintain 330 mV, while allowing the other IFB pin to float higher. This ensures both strings receive their programmed current despite forward voltage mismatch - e.g., a 4-LED string (12.8 V) and 6-LED string (19.2 V) can operate simultaneously from the same IOUT node. The TPS61150DRCRG4 achieves this without external compensation or additional components.
Can TPS61150DRCRG4 drive more than two LED strings?
No - the TPS61150DRCRG4 is strictly a dual-output WLED driver with two dedicated current sinks (IFB1/IFB2) and corresponding control pins (ISET1/ISET2, SEL1/SEL2). It cannot natively drive three or more independent strings. However, multiple TPS61150DRCRG4 devices can be synchronized via external clock injection (not supported natively) or used in parallel for higher total LED count - though this requires careful thermal and layout management. Each TPS61150DRCRG4 supports up to 14 WLEDs total when both outputs are configured identically.
What is the maximum PWM dimming frequency supported by TPS61150DRCRG4?
The TPS61150DRCRG4 supports PWM dimming up to 30 kHz (maximum specified), enabled by its 1.2-MHz switching frequency and fast current-sink settling time (6 μs). At 20% minimum duty cycle, the theoretical maximum is ~33 kHz - placing modulation beyond the audible range (20 Hz–20 kHz) to eliminate inductor/capacitor buzz. For optimal linearity, soft start is automatically disabled during PWM operation, and the SEL pin must meet logic thresholds: VSELH ≥ 1.2 V and VSELL ≤ 0.4 V.
Does TPS61150DRCRG4 require an external Schottky diode?
No - the TPS61150DRCRG4 integrates a power diode with 0.83–1.0 V forward voltage at 0.7 A, eliminating the need for an external Schottky diode. This integration reduces BOM count, PCB area, and potential failure points. The internal diode is co-packaged with the 0.7-A N-channel MOSFET and optimized for the 1.2-MHz switching frequency. Using an external diode is neither required nor recommended, as it would bypass the integrated protection and degrade efficiency due to added parasitic inductance.
TPS61150DRCRG4 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)
TPS61150DRCRG4 FAQ
1.How can I place an order for TPS61150DRCRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61150DRCRG4 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 TPS61150DRCRG4 reliable?
The price and inventory of TPS61150DRCRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61150DRCRG4 is usually 5 days.
3.What payment methods are accepted for TPS61150DRCRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61150DRCRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61150DRCRG4?
TPS61150DRCRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61150DRCRG4 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 TPS61150DRCRG4?
For technical support, including TPS61150DRCRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61150DRCRG4 requirements.
6.How does Aetrix verify that TPS61150DRCRG4 is sourced from the original manufacturer or authorized distributors?
All TPS61150DRCRG4 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 TPS61150DRCRG4 meets industry standards.
7.What is the process for return or replacement of TPS61150DRCRG4?
All TPS61150DRCRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61150DRCRG4, 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 TPS61150DRCRG4 part is unused and in its original packaging.
Return procedure for TPS61150DRCRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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