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Skyworks Solutions Inc. AAT3124ITO-20-T1
- Part No.:
- AAT3124ITO-20-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- LED Drivers
- Package:
- -
- Datasheet:
-
AAT3124ITO-20-T1.pdf
- Description:
- IC LED DRIVER RGLTR DIM 14TSOPJW
- Quantity:
- Payment:
- Shipping:
Inventory:204,000
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Product details
Overview
AAT3124ITO-20-T1 from Skyworks Solutions is a six-channel, constant-current white LED driver IC with dual-mode 1X/1.5X fractional charge pump architecture, operating from 2.7V to 5.5V input and delivering up to 20mA per channel with 32-step logarithmic brightness control via S2Cwire™ interface; it targets compact backlighting in portable LCD displays and RGB lighting modules.
For engineers reviewing the AAT3124ITO-20-T1 datasheet, AAT3124ITO-20-T1 pinout, AAT3124ITO-20-T1 application, or AAT3124ITO-20-T1 equivalent, key selection criteria include its 1MHz fixed-frequency charge pump operation, thermal shutdown protection, 0.5% current matching between outputs, QFN44-16 package footprint, and support for parallel output configuration without external resistors.
Technical Context
The AAT3124ITO-20-T1 implements an adaptive dual-mode power path: it automatically selects 1X load-switch mode when VIN exceeds the highest output voltage (D1–D4 or D5–D6 group), and 1.5X charge pump mode when VIN falls below required LED forward voltage-enabling >93% measured efficiency at 120mA total output. Its internal feedback references both D1 and D5 outputs independently to maintain regulation across two distinct LED voltage groups.
Control is executed via a single-wire S2Cwire™ interface on the EN/SET pin, where rising edges increment a 32-state counter (1dB/step) to set current from 525μA (Code 1) to 20mA (Code 32); soft-start limits inrush current to 200μs, and thermal protection disables LDO/charge pump if junction temperature exceeds 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.7V to 5.5V - supports single-cell Li-ion and multi-cell alkaline battery inputs without external regulators. |
| Output Channels | 6 independent constant-current sources - enables simultaneous drive of six discrete LEDs or grouped backlight strings. |
| Max Output Current | 20mA per channel - sufficient for standard white LEDs at full brightness with margin for aging and temperature drift. |
| Current Matching | ±0.5% between any two outputs - ensures uniform luminance across RGB or multi-zone backlight arrays. |
| Switching Frequency | 1MHz fixed - permits use of 1μF ceramic flying capacitors, minimizing PCB area and EMI compared to lower-frequency boost converters. |
| Shutdown Current | <1μA - preserves battery life in standby mode for portable devices requiring long idle periods. |
| Operating Temp | −40°C to +85°C - validated for industrial and consumer handheld environments including automotive infotainment displays. |
Pinout & Package
The AAT3124ITO-20-T1 is packaged in a Pb-free 16-pin QFN (4×4mm, 0.5mm pitch) with exposed thermal paddle connected to GND. Pin numbering follows top-view orientation per JEDEC MO-220.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D1–D6 | Constant-current source outputs | Each delivers programmable 525μA–20mA; D1 and D5 serve as primary reference nodes for respective output groups. |
| EN/SET | S2Cwire™ serial control input | Single-wire interface accepting rising-edge pulses up to 1MHz to select 32 brightness levels; also enables/disables device. |
| VIN | Main power input | Accepts 2.7–5.5V supply; requires 1μF ceramic decoupling capacitor to ground for stable operation. |
| OUT | Charge pump output node | Provides regulated voltage to current sources; connects to 1μF output capacitor for ripple suppression. |
| C1+/C1−, C2+/C2− | Flying capacitor terminals | Two differential pairs for 1.5X charge pump; each pair requires 1μF low-ESR ceramic capacitor. |
| GND | Power and signal ground | Common return path; exposed paddle must be soldered to PCB ground plane for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode 1X/1.5X conversion | Automatically switches between lossless load switch and efficient fractional charge pump based on real-time VIN vs. LED VF comparison-no firmware or external logic needed. |
| Independent dual-reference architecture | D1 and D5 act as separate regulation references, enabling simultaneous driving of two LED types (e.g., high-VF blue/green and low-VF red) with matched current accuracy. |
| Test current auto-disable | ~2μA test current per unused output detects open-circuit condition and disables that channel-eliminates wasted current and improves system efficiency. |
| No-inductor design | Relies solely on ceramic capacitors (CIN, COUT, C1, C2), reducing BOM cost, board space, and EMI susceptibility versus inductor-based boost solutions. |
| Thermal shutdown protection | Disables LDO and charge pump when junction temperature exceeds 150°C-prevents permanent damage during sustained overloads or short circuits at OUT or Dx pins. |
Applications
| Color (RGB) Lighting | White LED Backlighting |
|---|---|
Use Scenario: Driving red, green, and blue LEDs in portable signage or ambient lighting systems where color balance must remain stable across temperature and supply variation. IC Role / Device Role / Timing Role: Six-channel constant-current source with independent D1/D5 referencing, enabling precise current matching across dissimilar VF LEDs without external compensation. Use Value: Maintains consistent chromaticity coordinates by delivering ±0.5% current matching between channels-even when red (VF ≈ 2.0V) and blue (VF ≈ 3.7V) LEDs operate simultaneously from same VIN. | Use Scenario: Powering edge-lit or direct-lit white LED arrays in small-format LCD displays for handheld medical instruments or industrial HMIs. IC Role / Device Role / Timing Role: Dual-mode charge pump regulating output voltage dynamically to match LED string requirements while minimizing power loss. Use Value: Achieves >93% efficiency at 120mA total load by selecting 1X mode when VIN > VLED and 1.5X mode only when necessary-extending battery runtime by up to 18% versus fixed-topology drivers. |
| White Photo Flash for DSCs | Programmable Current Source |
Use Scenario: Delivering brief, high-intensity illumination bursts in digital still cameras using pre-manufactured flash LED modules. IC Role / Device Role / Timing Role: Parallel-configurable current source supporting up to 120mA total output (6 × 20mA) with soft-start limiting inrush transients. Use Value: Enables rapid brightness ramp-up via S2Cwire™-reaching full 20mA within 200μs-while maintaining <20mVpp input noise to avoid interference with image sensor analog front-end. | Use Scenario: Providing calibrated, digitally adjustable current for optical sensors, laser diodes, or precision analog biasing in test equipment. IC Role / Device Role / Timing Role: Precision logarithmic DAC implemented via 32-step S2Cwire™ interface with 1dB resolution and guaranteed monotonicity. Use Value: Delivers repeatable 525μA–20mA output with <0.5% matching across channels-eliminating need for trimming resistors or calibration routines in production test fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3606B-W5-7 | 4-channel, 25mA max per channel; uses I²C interface instead of S2Cwire™; no dual-reference architecture. | Lacks independent D1/D5 referencing-cannot simultaneously regulate two LED VF groups; better suited for uniform white LED arrays only. | Select when I²C bus availability and higher per-channel current outweigh need for mixed-VF LED support. |
| LM3644TME/NOPB | 6-channel, 25mA/channel; uses I²C with register-based control; includes integrated thermal foldback but no 1X/1.5X auto-switching. | Fixed 1.5X charge pump only-lower efficiency at higher VIN; no automatic mode switching reduces flexibility in wide-input-range designs. | Prefer when register-level diagnostics and fault reporting are required over adaptive efficiency optimization. |
Compared with AP3606B-W5-7 and LM3644TME/NOPB, the AAT3124ITO-20-T1 uniquely combines six-channel programmability, dual-reference regulation, and autonomous 1X/1.5X mode selection-making it optimal for space-constrained, mixed-VF LED systems where efficiency, simplicity, and uniform luminance are critical.
Availability
AAT3124ITO-20-T1 is available at Aetrix Electronics and suitable for white LED backlighting, RGB lighting, photo flash, and programmable current source applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AAT3124ITO-20-T1 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
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions for wireless, automotive, and industrial markets.
The AAT3124ITO-20-T1 belongs to Skyworks' high-efficiency LED driver product line, designed specifically for battery-powered portable displays and lighting systems demanding minimal external components, ultra-low quiescent current, and robust thermal protection.
FAQ
What is the maximum total output current supported by the AAT3124ITO-20-T1?
The AAT3124ITO-20-T1 supports up to 20mA per channel across all six outputs, yielding a maximum total output current of 120mA when all D1–D6 outputs are paralleled. This capability is verified under typical conditions (VIN = 3.5V, TA = 25°C) and remains within thermal limits when the exposed paddle is properly soldered to a grounded copper plane per the QFN44-16 layout guidelines.
How does the AAT3124ITO-20-T1 handle different LED forward voltages across its six outputs?
The AAT3124ITO-20-T1 uses independent reference sensing on D1 (for D1–D4 group) and D5 (for D5–D6 group), allowing simultaneous regulation of two distinct LED VF sets-such as 2.0V red and 3.7V blue LEDs-with matched current accuracy. This dual-reference architecture is intrinsic to the AAT3124ITO-20-T1 and does not require external circuitry or firmware intervention.
What is the function of the EN/SET pin on the AAT3124ITO-20-T1?
The EN/SET pin on the AAT3124ITO-20-T1 serves as the sole interface for enabling the device and programming output current via Skyworks' S2Cwire™ protocol: each rising edge increments a 32-state counter (1dB/step), setting current from 525μA (Code 1) to 20mA (Code 32). Holding EN/SET high maintains the selected level; pulling low for ≥500μs disables the AAT3124ITO-20-T1 and reduces quiescent current to <1μA.
Does the AAT3124ITO-20-T1 require external current-setting resistors?
No, the AAT3124ITO-20-T1 does not require external current-setting resistors. All six output currents are internally generated and digitally programmed via the EN/SET pin's S2Cwire™ interface. The device integrates precision current references and DAC circuitry, ensuring 20mA full-scale accuracy and ±0.5% matching between any two outputs without resistor tolerance or layout sensitivity.
What thermal protection features are built into the AAT3124ITO-20-T1?
The AAT3124ITO-20-T1 includes integrated thermal shutdown that disables both the LDO and charge pump sections when junction temperature exceeds 150°C-preventing permanent damage during sustained overload or short-circuit events. Recovery occurs automatically once die temperature falls below the hysteresis threshold. This protection is active regardless of operating mode (1X or 1.5X) and applies to all outputs and the OUT pin.
AAT3124ITO-20-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Topology:
- -
- Internal Switch(s):
- -
- Number of Outputs:
- -
- Voltage - Supply (Min):
- -
- Voltage - Supply (Max):
- -
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AAT3124ITO-20-T1 FAQ
1.How can I place an order for AAT3124ITO-20-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT3124ITO-20-T1 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 AAT3124ITO-20-T1 reliable?
The price and inventory of AAT3124ITO-20-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AAT3124ITO-20-T1 is usually 5 days.
3.What payment methods are accepted for AAT3124ITO-20-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT3124ITO-20-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT3124ITO-20-T1?
AAT3124ITO-20-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT3124ITO-20-T1 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 AAT3124ITO-20-T1?
For technical support, including AAT3124ITO-20-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT3124ITO-20-T1 requirements.
6.How does Aetrix verify that AAT3124ITO-20-T1 is sourced from the original manufacturer or authorized distributors?
All AAT3124ITO-20-T1 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 AAT3124ITO-20-T1 meets industry standards.
7.What is the process for return or replacement of AAT3124ITO-20-T1?
All AAT3124ITO-20-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT3124ITO-20-T1, 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 AAT3124ITO-20-T1 part is unused and in its original packaging.
Return procedure for AAT3124ITO-20-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AAT3124ITO-20-T1 Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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