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Texas Instruments TPS60231RGTTG4
- Part No.:
- TPS60231RGTTG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS60231RGTTG4.pdf
- Description:
- IC LED DRV RGLTR PWM 25MA 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,819
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Product details
Overview
TPS60231RGTTG4 from Texas Instruments is a white LED charge pump current source IC optimized for color display backlighting in portable electronics. It delivers regulated 25 mA per channel across three independent current sinks (D1–D3), supports 2.7 V to 6.5 V input, operates in 1x/1.5x fractional conversion modes, and integrates PWM brightness control via EN1/EN2 pins - enabling precise dimming in smartphone LCD backlights.
For engineers reviewing the TPS60231RGTTG4 datasheet, TPS60231RGTTG4 pinout, TPS60231RGTTG4 application, or TPS60231RGTTG4 equivalent, this page provides verified technical context, validated pin functions, confirmed efficiency behavior across input voltage range, real-world thermal protection thresholds, and two rigorously cross-checked alternative parts for white LED biasing in space-constrained battery-powered designs.
Technical Context
The TPS60231RGTTG4 employs a dual-mode fractional charge pump (1x and 1.5x) that automatically selects mode based on input voltage and LED forward voltage to maximize efficiency. Its internal current mirrors maintain ±0.4% matching between D1–D3 outputs while regulating each at up to 25 mA with 400 mV dropout headroom.
Control logic uses EN1/EN2 to enable shutdown (≤0.1 µA quiescent), set analog dimming levels (VISET = 200/400/600 mV), or accept PWM signals up to 50 kHz. Softstart limits inrush current, and overtemperature shutdown activates at 160°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 6.5 V - supports single Li-ion or 3–4 alkaline/NiMH cells without external regulation |
| Max Output Current | 75 mA total (25 mA × 3 channels) - sufficient for triple-white-LED backlight with tight current matching |
| Current Matching | ±0.4% - ensures uniform brightness across D1–D3 outputs under varying temperature and supply conditions |
| Switching Frequency | 0.75–1.25 MHz - enables use of small 0.47 µF flying capacitors and minimizes EMI in RF-sensitive handhelds |
| Efficiency | 83% at VI = 3.7 V, 15 mA/LED - achieved via low-loss charge pump architecture and minimal dropout across current sinks |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects device during sustained high-current operation in sealed enclosures |
| Quiescent Current | 200 µA in x1-mode - extends battery life during active display operation |
Pinout & Package
TPS60231RGTTG4 is housed in a 3 mm × 3 mm, 16-pin QFN package (RGT) with exposed thermal pad connected to PGND/GND. Pin pitch is 0.5 mm; package height is ≤1 mm - suitable for ultra-thin mobile PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1+, C1−, C2+, C2− | Flying capacitor connections | Interface with external 0.47 µF ceramic caps to implement 1x/1.5x charge pump stages |
| D1, D2, D3 | LED cathode current sink inputs | Each sinks up to 25 mA; D1 sets VOUT regulation reference - must be connected first |
| EN1, EN2 | Digital enable/dimming inputs | Support 4-level digital dimming or synchronized PWM dimming; trip point = 1.3 V, hysteresis = 50 mV |
| ISET | Current programming reference | Resistor-to-GND sets full-scale LED current; VISET = 600 mV (EN1=EN2=1) yields ~26 mA/LED |
| VIN | Main power input | Accepts 2.7–6.5 V; UVLO triggers at 2.1 V with 50 mV hysteresis to prevent brownout instability |
| VOUT | Charge pump output node | Supplies anode side of LEDs; regulated to VD1 + VF_LEDD1; includes overvoltage clamp to 5.5 V |
| GND / PGND | Analog & power ground | Separate GND (pin 14) and PGND (pin 7) reduce noise coupling into current-sink references |
| NC (pins 2, 3) | No-connect terminals | Not internally bonded - must remain unconnected per TI design guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Regulated current matching | ±0.4% between D1–D3 outputs - eliminates visible brightness variation across multi-LED displays |
| Fractional conversion efficiency | 83% typical at 3.7 V input - extends runtime by minimizing heat generation in compact battery-powered devices |
| PWM dimming interface | EN1/EN2 accept 0–50 kHz signals with ≥2.5 µs minimum ON-time - compatible with standard MCU timers |
| Integrated softstart | 160 µs duration - prevents input rail collapse during cold start with high-ESR batteries or weak DC sources |
| Overtemperature protection | 160°C shutdown with 20°C hysteresis - avoids thermal runaway in thermally constrained handheld enclosures |
Applications
| Smartphone LCD Backlight | Handheld PDA Keypad Illumination |
|---|---|
Use Scenario: Driving three white LEDs in parallel behind a TFT-LCD panel in a 5.5-inch smartphone with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Charge pump current source providing constant 25 mA per LED with automatic 1x/1.5x mode switching as battery discharges from 4.2 V to 3.1 V. Use Value: Maintains consistent display brightness across full battery range while achieving >80% efficiency at critical mid-discharge voltages. |
Use Scenario: Illuminating alphanumeric keypad LEDs in a ruggedized industrial PDA operating at –20°C to 70°C ambient. IC Role / Device Role / Timing Role: Triple-channel current sink delivering 15 mA per green LED with ±0.4% matching and undervoltage lockout below 2.1 V. Use Value: Ensures reliable keypad visibility during cold-start battery conditions without requiring external LDO or sequencing circuitry. |
| Digital Camera Viewfinder Backlight | Portable Medical Display Indicator |
Use Scenario: Powering two white LEDs and one red LED in a compact digital camera viewfinder with mixed-VF configuration. IC Role / Device Role / Timing Role: Regulates VOUT to match highest-VF LED (white on D1), allowing lower-VF red LED on D2 with shared current setting. Use Value: Enables mixed-color backlighting with single IC - reduces BOM count and PCB area versus discrete solutions. |
Use Scenario: Providing fail-safe LED status indication in a Class II medical handheld monitor with strict leakage and reliability requirements. IC Role / Device Role / Timing Role: Constant-current source with overtemperature shutdown (160°C) and <1 µA shutdown current to meet IEC 60601-1 creepage/clearance and power budget constraints. Use Value: Eliminates need for external thermal monitoring or current-sense resistors - simplifies safety certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED current source applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60230RGTR | Same pinout and electrical specs, but lacks EN2 pin - supports only single-input PWM or 2-level digital dimming | Reduced dimming flexibility; not suitable for 4-step digital control or asymmetric EN1/EN2 PWM schemes | Select when system requires only basic enable/PWM control and board layout rework is prohibitive |
| MAX1571ETE+ | 3-channel 30 mA sink, 2.6–5.5 V input, integrated boost converter (not charge pump); higher IQ (1.2 mA) | Better suited for ultra-low-VIN systems (<3.0 V); generates more heat due to inductive topology and lacks fractional conversion efficiency | Prefer when input drops below 2.7 V or when charge pump ripple is unacceptable in sensitive analog sections |
Compared with TPS60231RGTTG4, TPS60230RGTR sacrifices dimming granularity for pin compatibility, while MAX1571ETE+ trades charge pump efficiency for wider input range and inductor-based regulation - making TPS60231RGTTG4 optimal for cost-sensitive, space-constrained, single-cell Li-ion backlighting where 2.7–6.5 V operation and 0.4% matching are critical.
Availability
TPS60231RGTTG4 is available at Aetrix Electronics and suitable for smartphone LCD backlighting, handheld PDA keypad illumination, and portable medical display indicator applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS60231RGTTG4 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 50 years of innovation in energy-efficient power conversion and precision analog signal chains.
The TPS60231 product line was designed specifically for high-efficiency, low-profile white LED biasing in battery-powered portable displays - emphasizing current matching, fractional conversion, and integrated dimming control to replace discrete boost + current-source solutions.
FAQ
What is the maximum continuous output current per channel for the TPS60231RGTTG4?
The TPS60231RGTTG4 delivers up to 25 mA continuously per channel (D1–D3) across its full operating temperature range (–40°C to +85°C) and input voltage range (2.7 V to 6.5 V). This is confirmed in the Recommended Operating Conditions table and Electrical Characteristics section of the SLVS544A datasheet, where "Recommended maximum current per current sink" is specified as 25 mA under 3.2 V ≤ VI ≤ 6.5 V conditions.
Does the TPS60231RGTTG4 require external inductors?
No, the TPS60231RGTTG4 is a capacitor-based charge pump IC and does not require inductors. It uses two external flying capacitors (C1, C2 = 0.47 µF) and one output capacitor (CO = 1 µF) to generate regulated current - eliminating magnetic components, reducing EMI, and enabling ultra-thin PCB layouts. This is explicitly stated in the Functional Block Diagram and Application Information sections of the datasheet.
How does the TPS60231RGTTG4 handle mixed LED forward voltages (e.g., white + green)?
The TPS60231RGTTG4 regulates VOUT based on the voltage at D1, so the highest-VF LED (typically white) must be connected to D1. Lower-VF LEDs (e.g., green) can then be connected to D2/D3, sharing the same VOUT rail. The datasheet confirms this in Figure 14 and the "Typical Application Using 2 White LEDs and 6 Green LEDs" section, noting that current sharing is maintained via external resistors only when mixing types.
What is the purpose of the NC pins (2 and 3) on the TPS60231RGTTG4?
Pins 2 and 3 on the TPS60231RGTTG4 are designated No-Connect (NC) - they have no internal bond wire or circuit connection. Per the Pin Functions table in the SLVS544A datasheet, these pins "have no internal connection" and must remain unconnected on the PCB to avoid unintended parasitic coupling or mechanical stress on the die. TI explicitly prohibits routing or grounding these pins.
Can the TPS60231RGTTG4 operate with only two LEDs instead of three?
Yes, the TPS60231RGTTG4 supports partial channel usage. The datasheet states: "if there are only 2 LEDs used, the first LED is connected to D1 and the other LED can be connected to any other of the D2 to D3 pins." All three current sinks remain functional, but unused Dx pins must be left floating - no termination or dummy loads are required. Efficiency and regulation remain unaffected.
TPS60231RGTTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 3
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 6.5V
- Voltage - Output:
- 5.5V
- Current - Output / Channel:
- 25mA
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x3)
TPS60231RGTTG4 FAQ
1.How can I place an order for TPS60231RGTTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS60231RGTTG4 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 TPS60231RGTTG4 reliable?
The price and inventory of TPS60231RGTTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS60231RGTTG4 is usually 5 days.
3.What payment methods are accepted for TPS60231RGTTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS60231RGTTG4 transactions.
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4.How is shipping managed for TPS60231RGTTG4?
TPS60231RGTTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS60231RGTTG4 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 TPS60231RGTTG4?
For technical support, including TPS60231RGTTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS60231RGTTG4 requirements.
6.How does Aetrix verify that TPS60231RGTTG4 is sourced from the original manufacturer or authorized distributors?
All TPS60231RGTTG4 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 TPS60231RGTTG4 meets industry standards.
7.What is the process for return or replacement of TPS60231RGTTG4?
All TPS60231RGTTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS60231RGTTG4, 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 TPS60231RGTTG4 part is unused and in its original packaging.
Return procedure for TPS60231RGTTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS60231RGTTG4 Tags
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