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Texas Instruments TPS61151DRCR
- Part No.:
- TPS61151DRCR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS61151DRCR.pdf
- Description:
- IC LED DRV RGLTR PWM 35MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,413
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Product details
Overview
TPS61151DRCR 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 - ideal for clamshell phone sub/main display backlighting.
For engineers reviewing the TPS61151DRCR datasheet, TPS61151DRCR pinout, TPS61151DRCR application, or TPS61151DRCR equivalent, key selection considerations include its 22-V overvoltage protection threshold, 1.2-MHz fixed-frequency PWM control, dual independent ISET/IFB programming, thermal shutdown at 160°C, and VSON-10 (3 mm × 3 mm) package with exposed thermal pad.
Technical Context
The TPS61151DRCR 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 allowing up to 6% current mismatch between outputs. Its 1.2-MHz switching frequency minimizes output ripple and avoids audible noise, and the integrated 0.9-Ω (typ) MOSFET + 0.83–1.0 V diode enables compact, high-efficiency operation without external power devices.
Each output is controlled via dedicated SEL pins supporting independent enable/disable, PWM dimming, or shutdown (both SELx low >40 ms), with internal 300–700 kΩ pulldown resistors. Overvoltage protection triggers at 22 V (TPS61151-specific), with 440 mV hysteresis, and undervoltage lockout activates below 1.65 V (typ) to isolate input from output during brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6 V - compatible with single-cell Li-ion battery systems across full discharge curve. |
| Output Voltage Capability | Up to 27 V per channel - sufficient to drive 6–8 series WLEDs at typical forward voltage (3.2–3.6 V). |
| OVP Threshold | 22 V (TPS61151-specific) - protects 25-V-rated output capacitors and internal 30-V FET from overvoltage failure. |
| Switching Frequency | 1.2 MHz (fixed) - enables use of small 10-μH inductors and reduces EMI filtering requirements. |
| Max Output Current per Channel | 35 mA - defined by current-sink circuitry limit, independent of boost converter capability. |
| IFB Regulation Voltage | 330 mV (typ) - sets current sink headroom; actual regulation range is 300–360 mV across temperature. |
| Thermal Shutdown | 160°C (typ) with 15°C hysteresis - prevents permanent damage during sustained overload 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 for optimal power dissipation (RθJB = 19.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10 IFB1, IFB2 | Current feedback sense inputs | Return path for regulated current sinks; device disables corresponding output when pin is open or pulled high beyond regulation range. |
| 2, 9 ISET1, ISET2 | Current programming inputs | Resistor-connected pins setting output current via IOUT = (VISET/RSET) × KISET; VISET = 1.229 V (typ), KISET = 900 (typ). |
| 3, 4 SEL1, SEL2 | Output enable/dimming control inputs | Digital logic inputs enabling/disabling respective outputs; support PWM dimming (disable soft start for linearity) and shutdown (both low >40 ms). |
| 5 VIN | Main power input | Supplies boost stage and internal circuitry; includes 1.65 V UVLO with 70 mV hysteresis for battery brownout protection. |
| 6 SW | Boost switch node | Connection point between internal MOSFET drain and inductor; requires low-ESR ceramic capacitor to GND for stability. |
| 7 IOUT | Boost output / LED anode supply | High-voltage output node delivering regulated bias to both LED strings; not internally current-limited - relies on IFB feedback loop. |
| 8 GND | Power and signal ground | Common return for input/output capacitors, thermal pad, and all internal circuitry; must be low-impedance connection. |
| - Exposed Thermal Pad | Thermal dissipation path | Must be soldered to PCB ground plane with ≥4 thermal vias for reliable operation at full load and ambient up to +85°C. |
Key Features
| Feature | Design Value |
|---|---|
| Single-inductor dual-output architecture | Reduces BOM count and board area vs. dual-converter solutions; eliminates inter-channel coupling issues from separate inductors. |
| Adaptive IFB regulation | Automatically selects highest-voltage IFB pin for feedback, enabling robust operation with mismatched LED string voltages (e.g., 5 vs. 7 LEDs). |
| Built-in soft start (16-step, 64-clock timing) | Prevents inrush current and output overshoot during startup; disabled automatically during PWM dimming to improve brightness linearity. |
| Integrated 0.7-A MOSFET + power diode | Eliminates need for external switching components; reduces layout complexity and improves efficiency over discrete implementations. |
| Audible-noise-suppressed PWM dimming | Disconnects LED strings from output capacitor during SEL low phase, minimizing voltage ripple and ceramic capacitor ringing. |
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: Dual-current-sink WLED driver providing isolated, programmable current to each display's LED string using shared boost converter and single inductor. Use Value: Enables space-constrained mechanical design with minimal component count while maintaining independent dimming and fault isolation between displays. | Use Scenario: Feature phone with main LCD and illuminated keypad requiring coordinated but distinct backlight intensity levels. IC Role / Device Role / Timing Role: Single-chip solution driving display (higher current) and keypad (lower current) strings with separate SEL/ISET configuration. Use Value: Reduces bill-of-materials cost and PCB area versus two discrete drivers; supports simultaneous or staggered PWM dimming sequences. |
| Up to 14-WLED Driver | Compact Portable Display Power |
Use Scenario: Monolithic large-format display (e.g., smartwatch or industrial HMI) using 14-series WLEDs split across two parallel strings. IC Role / Device Role / Timing Role: High-efficiency boost driver delivering up to 35 mA per string at up to 27 V, leveraging adaptive IFB regulation for voltage mismatch tolerance. Use Value: Achieves >83% efficiency at 3.6 V input while fitting within 3 mm × 3 mm footprint - critical for ultra-thin wearable designs. | Use Scenario: Battery-powered handheld medical or test equipment needing reliable, low-noise WLED backlight with long runtime. IC Role / Device Role / Timing Role: Integrated power management IC combining boost conversion, current regulation, OVP, UVLO, and thermal protection in one VSON package. Use Value: Eliminates external FET/diode, reduces thermal stress via exposed pad, and ensures safe operation across full battery voltage range (2.5–6 V). |
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 |
|---|---|---|---|
| TPS61150DRCR | 28-V OVP threshold (vs. 22 V); identical pinout, package, and functional behavior otherwise. | Suitable where higher output voltage margin is required (e.g., 8-LED strings or elevated temperature Vf drift). | Select TPS61150DRCR if system requires >22 V output headroom; otherwise TPS61151DRCR offers tighter OVP for improved capacitor derating. |
| RT8532GQW | 2.7–5.5 V input, 30-V OVP, 1.3-MHz switching, but uses external MOSFET and diode - larger solution size. | Used in cost-sensitive applications where external power devices are acceptable and higher OVP is needed. | Choose RT8532GQW only when board area is not constrained and external component sourcing is preferred; TPS61151DRCR provides superior integration. |
Compared with TPS61150DRCR, the TPS61151DRCR offers lower OVP (22 V vs. 28 V) for better capacitor voltage margin, while RT8532GQW requires external power devices and increases layout complexity - making TPS61151DRCR the optimal choice for compact, integrated dual-WLED backlight designs.
Availability
TPS61151DRCR is available at Aetrix Electronics and suitable for clamshell phone displays, portable medical device backlights, industrial HMIs, and battery-powered consumer electronics requiring stable component supply and long-term manufacturability.
Supply support for TPS61151DRCR 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 LED driver innovation.
The TPS6115x product line was designed specifically for space-constrained portable displays requiring dual independent WLED current regulation with minimal external components and high reliability across battery voltage ranges.
FAQ
What is the overvoltage protection threshold for the TPS61151DRCR?
The TPS61151DRCR has a fixed overvoltage protection (OVP) threshold of 22 V (typical), with 440 mV hysteresis. This value is device-specific and differs from the TPS61150DRCR (28 V OVP). The OVP circuit disables the boost switch when IOUT exceeds this threshold, protecting downstream capacitors and the internal 30-V FET. The threshold is factory-trimmed and not user-adjustable.
Can the TPS61151DRCR drive two LED strings with different forward voltages?
Yes, the TPS61151DRCR supports mismatched LED strings via adaptive IFB regulation: it dynamically selects the higher-voltage IFB pin (IFB1 or IFB2) as the feedback reference, ensuring both strings receive their programmed current even with significant forward voltage differences - e.g., 5-LED and 7-LED strings. This eliminates need for string balancing resistors.
What is the maximum PWM dimming frequency supported by the TPS61151DRCR?
The TPS61151DRCR supports PWM dimming up to 30 kHz (typical), limited by current sink settling time (Tisink = 6 μs). For 20% minimum duty cycle, the theoretical maximum is ~33 kHz. Operating above 20 kHz avoids audible noise from inductor/capacitor vibration. Soft start is automatically disabled during PWM dimming to preserve linearity.
Does the TPS61151DRCR require external MOSFETs or diodes?
No, the TPS61151DRCR integrates a 0.7-A N-channel MOSFET (rDS(on) = 0.9 Ω typ) and a power diode (VF = 0.83–1.0 V at 0.7 A), eliminating all external power-switching components. Only passive elements - input/output capacitors, inductor, and ISET/IFB resistors - are required, enabling a complete dual-WLED driver in <12 mm² PCB area.
How does thermal management work on the TPS61151DRCR?
The TPS61151DRCR features internal thermal shutdown at 160°C (typical) with 15°C hysteresis and relies on its exposed thermal pad for heat dissipation. With RθJB = 19.2°C/W, proper PCB design - including soldering the pad to a solid ground plane with ≥4 thermal vias - is essential to maintain junction temperature ≤125°C under full load at +85°C ambient.
TPS61151DRCR 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)
TPS61151DRCR FAQ
1.How can I place an order for TPS61151DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61151DRCR 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 TPS61151DRCR reliable?
The price and inventory of TPS61151DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61151DRCR is usually 5 days.
3.What payment methods are accepted for TPS61151DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61151DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61151DRCR?
TPS61151DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61151DRCR 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 TPS61151DRCR?
For technical support, including TPS61151DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61151DRCR requirements.
6.How does Aetrix verify that TPS61151DRCR is sourced from the original manufacturer or authorized distributors?
All TPS61151DRCR 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 TPS61151DRCR meets industry standards.
7.What is the process for return or replacement of TPS61151DRCR?
All TPS61151DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61151DRCR, 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 TPS61151DRCR part is unused and in its original packaging.
Return procedure for TPS61151DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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