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Texas Instruments TPS60230RGTT
- Part No.:
- TPS60230RGTT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS60230RGTT.pdf
- Description:
- IC LED DRV RGLTR PWM 25MA 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:350
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Product details
Overview
TPS60230RGTT from Texas Instruments is a white LED charge pump current source IC optimized for backlighting color displays in portable electronics. It delivers regulated 25 mA per channel across five independent current sinks, 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 backlights.
For engineers reviewing the TPS60230RGTT datasheet, TPS60230RGTT pinout, TPS60230RGTT application, or TPS60230RGTT equivalent, key selection criteria include its 1 MHz switching frequency, ±0.4% current matching between outputs, ultra-small 3 mm × 3 mm QFN-16 package with exposed thermal pad, and dual-mode enable logic supporting 4-step digital dimming or continuous PWM control.
Technical Context
The TPS60230RGTT implements a fractional-charge-pump architecture that automatically switches between 1x (direct pass-through) and 1.5x (voltage boost) modes based on input voltage and LED forward voltage requirements. This ensures optimal efficiency across battery discharge profiles - maintaining >83% efficiency at VI = 3.7 V with 15 mA per LED.
Its five integrated current sinks are independently controlled via external resistor programming at ISET and digitally enabled/disabled or dimmed using two logic inputs (EN1, EN2), which set reference voltage levels (200 mV / 400 mV / 600 mV) to scale output current to 1/3, 2/3, or full scale - without requiring external current-setting resistors per channel.
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 | 125 mA total (25 mA × 5 channels) - sufficient for full-color display backlight with five white LEDs |
| Current matching | ±0.4% - ensures uniform brightness across all LEDs in multi-channel arrays |
| Switching frequency | 1 MHz (0.75–1.25 MHz range) - enables use of small 0.47 µF flying capacitors and reduces EMI filtering burden |
| Efficiency | 83% at VI = 3.7 V, 15 mA/LED - achieved via low-dropout current sources and fractional conversion mode selection |
| Operating temperature | –40°C to +85°C - qualified for consumer handheld and industrial portable applications |
| Shutdown current | 0.1 µA - minimizes battery drain during display-off states in always-on devices |
Pinout & Package
TPS60230RGTT uses a 3 mm × 3 mm, 16-pin VQFN (RGT) package with exposed thermal pad (pin 4), rated for 1.9 W power dissipation at TA ≤ 25°C and 52 °C/W junction-to-ambient thermal resistance. The package requires soldering the thermal pad to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISET (Pin 1) | Current reference input | Resistor-to-GND sets full-scale LED current; voltage at this pin (200/400/600 mV) determines dimming step via EN1/EN2 logic |
| VIN (Pin 13) | Main power input | Accepts 2.7–6.5 V supply; feeds charge pump and internal regulators; includes UVLO (2.15 V threshold) |
| VOUT (Pin 8) | Charge pump output | Provides regulated voltage to LED anodes; internally regulated to maintain ~400 mV drop across D1 |
| D1–D5 (Pins 2–6) | LED cathode current sinks | Each sinks up to 25 mA; D1 must connect to highest-Vf LED for proper output regulation |
| EN1 (Pin 15), EN2 (Pin 16) | Dual enable/dimming inputs | Logic-controlled dimming: combinations yield 0%, 33%, 67%, or 100% full current; also accept PWM signals |
| C1+/C1−, C2+/C2− (Pins 9–12) | Flying capacitor connections | Interface with two 0.47 µF ceramic capacitors to implement 1x/1.5x charge pump stages |
| GND (Pin 14), PGND (Pin 7) | Analog and power ground | Separate GND/PGND pins reduce noise coupling; must be connected externally with low-inductance trace |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5-channel current sink | Eliminates need for five discrete current-setting resistors and associated layout area |
| Auto-switching 1x/1.5x charge pump | Extends usable battery life by operating efficiently across full discharge curve (3.1 V to 4.2 V) |
| Internal softstart | Limits inrush current during startup - prevents input rail sag when powered from high-impedance sources like coin cells |
| Overtemperature shutdown | Protects device at TJ > 155°C with 20°C hysteresis - ensures reliability in sealed handheld enclosures |
| Low EMI design | 1 MHz fixed-frequency operation + low-input-ripple architecture reduces need for ferrite beads or LC filters |
Applications
| Smartphone LCD Backlight | Digital Camera Display |
|---|---|
Use Scenario: Driving five white LEDs behind a 3.5-inch TFT-LCD panel in a battery-powered smartphone. IC Role / Device Role / Timing Role: Constant-current source regulating 25 mA per LED with synchronized PWM dimming via EN1/EN2 pins. Use Value: Enables uniform brightness and flicker-free dimming down to 1% duty cycle while maintaining >83% efficiency across 3.6 V–4.2 V battery range. | Use Scenario: Powering a compact 2.7-inch color LCD in a digital camera with variable ambient light conditions. IC Role / Device Role / Timing Role: Five-channel current regulator supporting both analog dimming (via ISET voltage) and digital step control (EN1/EN2 logic). Use Value: Delivers consistent luminance across temperature (–40°C to +85°C) and extends battery runtime via 1.5x mode activation only when required. |
| Handheld PC Keyboard Lighting | Camcorder Viewfinder Backlight |
Use Scenario: Illuminating alphanumeric keys on a ruggedized handheld PC with mixed LED types (white + green). IC Role / Device Role / Timing Role: Current sink array driving white LED on D1 (highest Vf) and green LEDs on D2–D5, leveraging D1-regulated VOUT. Use Value: Allows mixed-Vf LED configurations without external voltage translation, reducing BOM count and PCB area. | Use Scenario: Providing adjustable backlight for an OLED viewfinder in a camcorder with tight space constraints. IC Role / Device Role / Timing Role: Compact 3 mm × 3 mm QFN-16 charge pump delivering stable 20 mA per LED with minimal external components (four capacitors total). Use Value: Achieves <1 mm profile height including thermal pad, meeting mechanical stack-up requirements for slim camcorder designs. |
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 |
|---|---|---|---|
| TPS60231RGTT | Same pinout and function but supports higher max current (30 mA/channel); requires updated ISET resistor value | Better suited for high-brightness displays requiring >25 mA per LED | Select TPS60231RGTT if forward voltage margin is insufficient at 25 mA or if future-proofing for brighter LEDs is needed |
| MAX8647ETE+ | 5-channel, 30 mA sink; uses different enable logic (single EN pin); no 1.5x mode - relies on higher input voltage | Requires ≥4.5 V input; less efficient below 3.8 V; lacks auto-mode switching | Choose MAX8647ETE+ only if system input stays above 4.5 V and board layout cannot accommodate TPS60230RGTT's flying caps |
Compared with TPS60230RGTT, the TPS60231RGTT offers higher per-channel current headroom while maintaining identical footprint and control interface, whereas the MAX8647ETE+ trades fractional conversion efficiency for simpler capacitor count - making it viable only in fixed-high-voltage systems.
Availability
TPS60230RGTT is available at Aetrix Electronics and suitable for smartphone LCD backlighting, digital camera display modules, and handheld PC keyboard illumination requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for TPS60230RGTT 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 IC design.
The TPS60230RGTT belongs to TI's LED backlight driver product line, engineered specifically for space-constrained portable devices needing high-precision, multi-channel constant-current regulation with minimal external components.
FAQ
What is the maximum number of white LEDs the TPS60230RGTT can drive simultaneously?
The TPS60230RGTT can drive up to five white LEDs simultaneously, with each of its five integrated current sinks delivering up to 25 mA. At full load (5 × 25 mA = 125 mA), the device maintains regulation across its 2.7 V to 6.5 V input range using automatic 1x/1.5x charge pump mode switching - confirmed in the Electrical Characteristics table under "Maximum output current at VOUT" (125 mA).
How does the TPS60230RGTT achieve current matching better than ±0.4% between channels?
The TPS60230RGTT achieves ±0.4% current matching through precision current-mirror circuitry referenced to a single ISET pin, eliminating unit-to-unit variation from discrete resistors. This matching is measured at VDx = 3.1 V and TA = 25°C per the Electrical Characteristics table, and remains within ±3% across line regulation (3.2 V ≤ VI ≤ 6.5 V) - critical for uniform display luminance.
Can the TPS60230RGTT operate from a single 3.7 V Li-ion cell throughout its full discharge curve?
Yes - the TPS60230RGTT operates from 2.7 V to 6.5 V and automatically engages 1.5x charge pump mode when input drops below ~3.1 V, sustaining 25 mA per LED down to 3.1 V. Below that, maximum current scales linearly (e.g., ~20 mA at 2.9 V), as shown in Figure 5 ("Maximum Output Current vs Input Voltage") of the datasheet.
What capacitor values are required for the TPS60230RGTT, and why are low-ESR types specified?
The TPS60230RGTT requires two 0.47 µF low-ESR ceramic flying capacitors (C1, C2) and two 1 µF output/input capacitors (Ci, Co). Low-ESR is mandatory for flying caps to minimize conduction losses in the 1 MHz charge pump - directly impacting efficiency (up to 83%) and thermal rise. X5R/X7R dielectrics in 0603 or 0805 packages are validated per Table 2 in the datasheet.
Is the exposed thermal pad on the TPS60230RGTT package electrically connected, and how must it be handled in PCB layout?
Yes - the exposed thermal pad (Pin 4) on the TPS60230RGTT's QFN package is internally connected to PGND and must be soldered to a dedicated PCB copper pour tied to power ground. Per SLUA271 and the Package Outline drawing, this connection is essential for thermal dissipation (52 °C/W θJA) and mechanical stability; omission risks thermal shutdown or solder joint failure.
TPS60230RGTT 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:
- 5
- 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)
TPS60230RGTT FAQ
1.How can I place an order for TPS60230RGTT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS60230RGTT 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 TPS60230RGTT reliable?
The price and inventory of TPS60230RGTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS60230RGTT is usually 5 days.
3.What payment methods are accepted for TPS60230RGTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS60230RGTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS60230RGTT?
TPS60230RGTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS60230RGTT 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 TPS60230RGTT?
For technical support, including TPS60230RGTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS60230RGTT requirements.
6.How does Aetrix verify that TPS60230RGTT is sourced from the original manufacturer or authorized distributors?
All TPS60230RGTT 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 TPS60230RGTT meets industry standards.
7.What is the process for return or replacement of TPS60230RGTT?
All TPS60230RGTT units undergo pre-shipment inspection (PSI). If there is an issue with TPS60230RGTT, 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 TPS60230RGTT part is unused and in its original packaging.
Return procedure for TPS60230RGTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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