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Texas Instruments TPS60231RGTRG4
- Part No.:
- TPS60231RGTRG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS60231RGTRG4.pdf
- Description:
- IC LED DRV RGLTR PWM 25MA 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,373
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Product details
Overview
TPS60231RGTRG4 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), operates from 2.7 V to 6.5 V input, supports 1x/1.5x fractional conversion, and integrates PWM brightness control via EN1/EN2 pins - enabling precise dimming in smartphone LCD backlight systems.
For engineers reviewing the TPS60231RGTRG4 datasheet, TPS60231RGTRG4 pinout, TPS60231RGTRG4 application, or TPS60231RGTRG4 equivalent, key selection criteria include its 0.4% current matching between outputs, 1 MHz switching frequency for compact filtering, ultra-small 3 mm × 3 mm QFN-16 package with exposed thermal pad, and integrated overtemperature/overcurrent protection for robust battery-powered operation.
Technical Context
The TPS60231RGTRG4 employs a dual-mode fractional charge pump architecture that automatically selects 1x or 1.5x voltage conversion based on input voltage and LED forward voltage requirements. This enables high efficiency (>83% at 3.7 V, 15 mA/LED) across wide input ranges while maintaining constant-current regulation.
Its triple current sink topology uses matched internal current mirrors referenced to the ISET pin, where an external resistor sets full-scale output (K = 260× IISET). EN1 and EN2 support four discrete digital dimming levels or synchronized PWM dimming with sub-µs timing control and 50 kHz maximum frequency.
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 regulators. |
| Max output current | 75 mA total (25 mA per D1–D3 sink) - drives three white LEDs simultaneously at full brightness. |
| Current matching | ±0.4% - ensures uniform luminance across multi-LED displays without binning or calibration. |
| Switching frequency | 1 MHz (0.75–1.25 MHz) - allows use of tiny 0.47 µF ceramic flying capacitors and reduces EMI filtering area. |
| Efficiency | 83% typical at 3.7 V, 15 mA/LED - maximizes battery runtime in handheld devices. |
| Thermal protection | Shuts down at 160°C junction temperature with 20°C hysteresis - prevents thermal runaway during sustained load. |
| Shutdown current | 0.1 µA - extends shelf life and standby time in always-on portable systems. |
Pinout & Package
TPS60231RGTRG4 is housed in a 3 mm × 3 mm, 16-pin VQFN (RGT) package with exposed thermal pad (PGND-connected). The package meets JEDEC Level-2 moisture sensitivity and supports standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISET | Reference current input | Resistor-to-GND sets full-scale LED current (K = 260×); voltage at pin varies with EN1/EN2 state (200/400/600 mV). |
| D1–D3 | Current sink outputs | Each sinks up to 25 mA; D1 must connect to highest-VF LED for proper VOUT regulation. |
| EN1, EN2 | Digital/PWM enable inputs | Control four-step digital dimming or synchronized PWM dimming; logic-high threshold is 1.3 V. |
| VIN | Main power input | Accepts 2.7–6.5 V; feeds charge pump and internal bias circuits; requires 1 µF ceramic input capacitor. |
| VOUT | Charge pump output | Supplies current sinks; connects to anodes of all LEDs and 0.47–1 µF output capacitor. |
| C1+, C1−, C2+, C2− | Flying capacitor terminals | Interface with two 0.47 µF ceramic capacitors for 1x/1.5x charge pump operation. |
| GND / PGND | Analog & power ground | Separate GND (pin 14) and PGND (pin 7) reduce noise coupling; both connect to thermal pad. |
| NC | No-connect | Pins 2 and 3 have no internal connection - must be left unconnected or tied to GND for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Regulated current matching | ±0.4% matching between D1/D2/D3 outputs ensures consistent LED brightness without optical compensation. |
| Integrated softstart | 160 µs internal ramp limits inrush current during startup - prevents input rail collapse from high-impedance batteries. |
| Fractional conversion | Automatic 1x/1.5x mode switching extends usable battery range down to 3.1 V while maintaining 25 mA per LED. |
| Low-EMI design | 1 MHz fixed-frequency operation + low-input-ripple architecture minimizes conducted EMI, easing EMC compliance. |
| Protection suite | Includes undervoltage lockout (2.15 V threshold), overcurrent limiting (250 mA), and thermal shutdown (160°C). |
Applications
| Smartphone LCD Backlight | Handheld Device Keypad Lighting |
|---|---|
Use Scenario: Powering three white LEDs behind a 3.5-inch TFT-LCD in a battery-operated smartphone. IC Role / Device Role / Timing Role: Charge pump current source regulating 25 mA per LED with synchronized PWM dimming via EN1/EN2. Use Value: Delivers uniform brightness across display while extending battery life via >83% efficiency and automatic 1x/1.5x mode optimization. | Use Scenario: Driving six green LEDs (4 mA each) and two white LEDs (25 mA each) for dual-function backlighting in a PDA. IC Role / Device Role / Timing Role: Triple-sink current regulator with mixed-LED support; D1 assigned to highest-VF white LED for stable VOUT regulation. Use Value: Eliminates need for separate LED drivers - reduces BOM count and PCB area while supporting analog dimming via ISET pin. |
| Digital Camera Display Module | Portable Medical Instrument UI |
Use Scenario: Backlighting a 2.8-inch OLED-compatible LCD in a compact digital camera with Li-ion power supply. IC Role / Device Role / Timing Role: High-accuracy current source delivering 25 mA per channel with <0.4% matching to prevent visible banding. Use Value: Enables factory-calibration-free assembly and maintains color fidelity under varying battery voltage (2.7–6.5 V). | Use Scenario: Illuminating critical status indicators and touch-screen bezel LEDs in a Class II medical handheld device. IC Role / Device Role / Timing Role: Protected current driver with shutdown current <0.1 µA and thermal cutoff at 160°C for safety-critical operation. Use Value: Meets IEC 60601 leakage and reliability requirements while supporting low-duty-cycle PWM for battery-sensitive operation. |
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 function but lacks EN2 pin - supports only single-input PWM or digital enable, not 4-level dimming. | Reduced dimming flexibility; suitable only for basic on/off or single-PWM systems. | Select when 4-step digital dimming or dual-PWM synchronization is unnecessary and cost reduction is prioritized. |
| MAX8647ETE+ | 3-channel, 30 mA white LED driver with I²C interface and programmable current; larger 16-pin TQFN package (4 mm × 4 mm). | Requires microcontroller interface; supports dynamic current adjustment and fault reporting - not drop-in compatible. | Choose when system-level software control, diagnostics, or higher per-channel current (30 mA) is required. |
Compared with TPS60230RGTR, the TPS60231RGTRG4 adds EN2 for enhanced dimming granularity and tighter current matching; versus MAX8647ETE+, it offers simpler implementation with no firmware dependency but less configurability and smaller footprint.
Availability
TPS60231RGTRG4 is available at Aetrix Electronics and suitable for smartphone LCD backlighting, handheld keypad illumination, digital camera display modules, and portable medical instrument UIs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for TPS60231RGTRG4 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 solutions with decades of expertise in portable power ICs.
The TPS60231RGTRG4 belongs to TI's white LED backlight driver product line, designed specifically for space-constrained, battery-powered consumer electronics requiring high-current accuracy, low EMI, and seamless integration with existing PMIC architectures.
FAQ
What is the primary function of the TPS60231RGTRG4?
The TPS60231RGTRG4 is a triple-output white LED charge pump current source IC. It generates a regulated output voltage via 1x/1.5x fractional conversion and delivers precisely matched constant current (up to 25 mA per channel) to three white LEDs. Its core function is backlight power management in portable displays, with integrated PWM dimming, softstart, and protection features - all in a 3 mm × 3 mm QFN package.
How does the TPS60231RGTRG4 achieve current matching between its three outputs?
The TPS60231RGTRG4 achieves ±0.4% current matching using precision-matched internal current mirrors referenced to the ISET pin. The reference current set by the external ISET resistor is mirrored identically to D1, D2, and D3 sinks. This matching is specified over temperature (–40°C to 85°C) and input voltage (3.2 V to 6.5 V), ensuring uniform LED brightness without external calibration - critical for display quality in smartphones and PDAs.
Can the TPS60231RGTRG4 drive LEDs with different forward voltages?
Yes - the TPS60231RGTRG4 supports mixed LED configurations. The device regulates VOUT based on the voltage at D1, so the LED with the highest forward voltage must be connected to D1. Lower-VF LEDs (e.g., green or red) can then be connected to D2 and D3. Application Figure 14 demonstrates driving two white LEDs (25 mA each) and six green LEDs (4 mA each) using external current-sharing resistors - all powered by a single TPS60231RGTRG4.
What are the recommended external capacitors for the TPS60231RGTRG4?
The TPS60231RGTRG4 requires four external ceramic capacitors: two 0.47 µF flying capacitors (C1, C2) and one 1 µF input capacitor (CI) on VIN. A 0.47–1 µF output capacitor (CO) is placed at VOUT. TI recommends X5R or X7R dielectrics in 0603 or 0805 case sizes (e.g., TDK C1608X5R1A474M or Taiyo Yuden LMK107BJ474MA) for low ESR and stable performance across temperature.
Does the TPS60231RGTRG4 support analog dimming in addition to PWM?
Yes - the TPS60231RGTRG4 supports analog dimming via the ISET pin. With EN1 = EN2 = 1, applying a DC voltage from 0 mV to 600 mV to ISET linearly scales LED current from 100% to 0%. This enables smooth, flicker-free brightness control without requiring high-frequency PWM circuitry. The relationship is defined by ILED = (VISET/RISET) × K, where K = 260, allowing direct voltage-based current programming.
TPS60231RGTRG4 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)
TPS60231RGTRG4 FAQ
1.How can I place an order for TPS60231RGTRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS60231RGTRG4 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 TPS60231RGTRG4 reliable?
The price and inventory of TPS60231RGTRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS60231RGTRG4 is usually 5 days.
3.What payment methods are accepted for TPS60231RGTRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS60231RGTRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS60231RGTRG4?
TPS60231RGTRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS60231RGTRG4 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 TPS60231RGTRG4?
For technical support, including TPS60231RGTRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS60231RGTRG4 requirements.
6.How does Aetrix verify that TPS60231RGTRG4 is sourced from the original manufacturer or authorized distributors?
All TPS60231RGTRG4 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 TPS60231RGTRG4 meets industry standards.
7.What is the process for return or replacement of TPS60231RGTRG4?
All TPS60231RGTRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS60231RGTRG4, 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 TPS60231RGTRG4 part is unused and in its original packaging.
Return procedure for TPS60231RGTRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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