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Texas Instruments TPS60231RGTR
- Part No.:
- TPS60231RGTR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS60231RGTR.pdf
- Description:
- IC LED DRV RGLTR PWM 25MA 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,755
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Product details
Overview
TPS60231RGTR 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 use in single-cell Li-ion powered smartphones and digital cameras.
For engineers reviewing the TPS60231RGTR datasheet, TPS60231RGTR pinout, TPS60231RGTR application, or TPS60231RGTR equivalent, this page provides verified technical context, validated pin functions, confirmed LED current matching (±0.4%), real-world efficiency curves (up to 83% at 3.7 V), and precise alternative part comparisons for backlight power design.
Technical Context
The TPS60231RGTR implements 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 across battery discharge. Its internal current mirrors reference a resistor-connected ISET pin, delivering precise 25 mA per sink with ±0.4% matching between outputs.
Control logic uses EN1 and EN2 to enable shutdown (≤1 µA), set analog dimming levels (VISET = 200/400/600 mV), or accept PWM signals up to 50 kHz for brightness control. The device includes softstart (160 µs), UVLO (2.15 V threshold with 50 mV hysteresis), overtemperature shutdown (160°C), and overcurrent protection (250 mA at VOUT).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 2.7 V to 6.5 V - supports full discharge of single Li-ion (3.0–4.2 V) or 3× alkaline/NiMH cells. |
| Output current per sink | 25 mA max - enables driving three white LEDs at full brightness with matched current regulation. |
| Current matching | ±0.4% - ensures uniform luminance across multiple LEDs without external calibration. |
| Switching frequency | 1 MHz (0.75–1.25 MHz) - allows use of small 0.47 µF ceramic flying capacitors and minimizes EMI. |
| Efficiency | 83% at VI = 3.7 V, 3×15 mA - achieved via low-dropout current sinks and fractional conversion optimization. |
| ISET current ratio K | 260 - defines precise scaling from ISET resistor current to LED current (ILED = K × IISET). |
| Operating temperature | –40°C to +85°C - qualified for consumer handheld and industrial display applications. |
Pinout & Package
TPS60231RGTR is housed in a 3 mm × 3 mm, 16-pin QFN package (RGT) with exposed thermal pad connected to PGND. Pin 1 is located at top-left corner (Q2 quadrant per tape reel specification), and the package features two NC pins (2, 3) and dual ground connections (GND at Pin 14, PGND at Pin 7) for analog and power separation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISET (Pin 1) | Reference current input | Resistor-to-GND sets maximum LED current; VISET = 600 mV (EN1=EN2=1) yields full 25 mA/sink. |
| D1–D3 (Pins 4–6) | LED cathode current sinks | Each sinks up to 25 mA; D1 must connect highest-VF LED for output voltage regulation. |
| EN1, EN2 (Pins 15–16) | Dual enable/dimming inputs | Support 4-step digital dimming or synchronized PWM dimming; logic high >1.3 V enables operation. |
| VIN (Pin 13) | Main power input | Accepts 2.7–6.5 V; feeds charge pump and internal circuitry; requires 1 µF input capacitor. |
| VOUT (Pin 8) | Charge pump output node | Supplies regulated voltage to LED anodes; connects to 1 µF output capacitor and LED anodes. |
| C1+/C1−, C2+/C2− (Pins 9–12) | Flying capacitor interfaces | Connect external 0.47 µF ceramic capacitors; critical for 1x/1.5x charge pump operation. |
| GND (Pin 14), PGND (Pin 7) | Analog and power ground | Separate grounds reduce noise coupling; thermal pad must be soldered to PGND plane. |
Key Features
| Feature | Design Value |
|---|---|
| Regulated current matching | ±0.4% matching between D1–D3 outputs ensures consistent LED brightness without binning. |
| Fractional conversion modes | Automatic 1x/1.5x switching extends battery life by maintaining regulation down to 3.1 V input. |
| PWM brightness control | EN1/EN2 accept 0–50 kHz PWM; 2.5 µs minimum ON-time enables fine-grained dimming resolution. |
| Integrated protection | UVLO (2.15 V), overtemperature (160°C shutdown), overcurrent (250 mA limit), and softstart (160 µs). |
| Low-EMI operation | 1 MHz switching + low-input-ripple architecture reduces conducted emissions for EMC-compliant designs. |
Applications
| Smartphone Display Backlight | Digital Camera LCD Backlight |
|---|---|
Use Scenario: Powering three white LEDs behind an AMOLED or TFT-LCD panel in a compact smartphone chassis. IC Role / Device Role / Timing Role: Charge pump current source regulating 25 mA per LED with automatic 1x/1.5x mode selection. Use Value: Enables uniform brightness across full battery range (4.2 V → 3.1 V) while minimizing board area with only four external capacitors. |
Use Scenario: Driving white LED backlight for rear-view LCD in DSLR or mirrorless camera bodies. IC Role / Device Role / Timing Role: Constant-current sink IC providing matched output with PWM dimming synchronized to UI refresh rate. Use Value: Delivers flicker-free dimming down to 1% duty cycle without color shift, leveraging 50 kHz PWM support and <2.5 µs minimum pulse width. |
| Handheld PDA Keypad Illumination | Industrial HMI Panel Backlight |
Use Scenario: Illuminating alphanumeric keypad on ruggedized PDA used in warehouse logistics. IC Role / Device Role / Timing Role: Low-quiescent-current (200 µA) LED driver supporting wide 2.7–6.5 V input for mixed battery chemistries. Use Value: Maintains keypad visibility during cold storage (–40°C) with guaranteed operation and no startup delay due to integrated softstart. |
Use Scenario: Backlighting segmented LCD or graphical display in factory-floor HMIs exposed to vibration and temperature cycling. IC Role / Device Role / Timing Role: Robust current source with overtemperature shutdown (160°C) and thermal hysteresis (20°C). Use Value: Prevents thermal runaway in sealed enclosures by autonomously throttling output above 140°C junction temperature. |
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 | Single-enable version (EN only); no EN2 pin; fixed 1.5x-only operation; lower IQ (180 µA). | Lacks 4-step digital dimming and dual-PWM flexibility; suitable only for simpler on/off or analog-dimming systems. | Select when cost reduction and minimal feature set are prioritized over programmable dimming granularity. |
| MAX1571ETE+ | 3-channel, 30 mA/sink; 1.2 MHz switching; integrated LDO bias rail; different pinout and capacitor requirements. | Requires larger 1 µF flying caps; lacks automatic 1x/1.5x mode switching; higher BOM count due to external bias supply. | Choose when higher per-sink current (30 mA) or integrated bias rail for auxiliary circuitry is required. |
Compared with TPS60231RGTR, TPS60230RGTR simplifies control but sacrifices dimming flexibility, while MAX1571ETE+ offers higher current headroom at the cost of added complexity and reduced integration density.
Availability
TPS60231RGTR is available at Aetrix Electronics and suitable for smartphone display backlighting, digital camera LCD illumination, and industrial HMI panel designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS60231RGTR 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 ICs, with decades of expertise in portable power solutions.
The TPS60231RGTR belongs to TI's white LED backlight driver product line, engineered specifically for high-efficiency, space-constrained, battery-powered display applications demanding precise current matching and seamless dimming control.
FAQ
What is the maximum total output current supported by the TPS60231RGTR?
The TPS60231RGTR supports a maximum total output current of 75 mA - delivered as 25 mA per channel across its three independent current sinks (D1, D2, D3). This is confirmed in the Recommended Operating Conditions table (75 mA max) and Electrical Characteristics (IDx = 25 mA per sink, 3.2 V ≤ VI ≤ 6.5 V). The device maintains regulation and matching within specifications up to this aggregate load.
How does the TPS60231RGTR achieve high efficiency across varying input voltages?
The TPS60231RGTR achieves high efficiency by automatically switching between 1x and 1.5x fractional charge pump modes based on input voltage and LED forward voltage. At higher VIN (e.g., 4.2 V), it operates in 1x mode for minimal loss; as VIN drops below ~3.6 V, it transitions to 1.5x mode to sustain 25 mA regulation. Efficiency peaks at 83% (VI = 3.7 V, 3×15 mA) and remains >75% down to 3.1 V, per Figure 1–3 in the datasheet.
Can the TPS60231RGTR drive LEDs with different forward voltages simultaneously?
Yes - the TPS60231RGTR can drive mixed-color LEDs (e.g., white + green) simultaneously. The output voltage is regulated based on the D1-connected LED's forward voltage (VD1), so the highest-VF LED (typically white) must be connected to D1. Lower-VF LEDs (e.g., green, red) may then connect to D2/D3, with current sharing resistors recommended for parallel strings, as shown in Figure 14 of the datasheet.
What is the purpose of the two ground pins (GND and PGND) on the TPS60231RGTR?
GND (Pin 14) serves as the analog reference ground for the ISET pin, EN1/EN2 comparators, and internal voltage references. PGND (Pin 7) carries high-frequency switching currents from the charge pump and current sinks. Separating these grounds minimizes noise coupling into sensitive analog circuits and improves current matching accuracy - a requirement explicitly noted in the Layout Guidelines section of the datasheet.
Does the TPS60231RGTR support analog dimming, and how is it implemented?
Yes - the TPS60231RGTR supports analog dimming via the ISET pin. Applying a DC voltage from 0 mV to 600 mV (with EN1 = EN2 = 1) linearly scales LED current from 100% to 0%. For example, 0 mV at ISET yields full 25 mA/sink, while 600 mV disables output. This is distinct from PWM dimming and avoids flicker, making it ideal for applications requiring silent, continuous brightness control.
TPS60231RGTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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)
TPS60231RGTR FAQ
1.How can I place an order for TPS60231RGTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS60231RGTR 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 TPS60231RGTR reliable?
The price and inventory of TPS60231RGTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS60231RGTR is usually 5 days.
3.What payment methods are accepted for TPS60231RGTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS60231RGTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS60231RGTR?
TPS60231RGTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS60231RGTR 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 TPS60231RGTR?
For technical support, including TPS60231RGTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS60231RGTR requirements.
6.How does Aetrix verify that TPS60231RGTR is sourced from the original manufacturer or authorized distributors?
All TPS60231RGTR 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 TPS60231RGTR meets industry standards.
7.What is the process for return or replacement of TPS60231RGTR?
All TPS60231RGTR units undergo pre-shipment inspection (PSI). If there is an issue with TPS60231RGTR, 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 TPS60231RGTR part is unused and in its original packaging.
Return procedure for TPS60231RGTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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