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Skyworks Solutions Inc. AAT3155ITP-T1
- Part No.:
- AAT3155ITP-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- LED Drivers
- Package:
- 12-TFSOJ (0.094", 2.40mm Width)
- Datasheet:
-
AAT3155ITP-T1.pdf
- Description:
- IC LED DRIVER RGLTR DIM 12TSOPJW
- Quantity:
- Payment:
- Shipping:
Inventory:78,000
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Product details
Overview
AAT3155ITP-T1 from Skyworks is a 3-channel white LED driver IC with I²C interface, 30V output capability, 1.8–5.5V input voltage range, and ±1.5% LED current matching across channels; used in backlighting for small-to-medium LCD panels in portable consumer electronics.
For engineers reviewing the AAT3155ITP-T1 datasheet, AAT3155ITP-T1 pinout, AAT3155ITP-T1 application, or AAT3155ITP-T1 equivalent, key selection criteria include channel count, I²C programmability, output voltage headroom, current matching tolerance, and thermal performance in 16-pin TQFN package.
Technical Context
The AAT3155ITP-T1 integrates three independent high-side current sinks with internal PWM dimming control and I²C register-based configuration. It supports 8-bit LED current programming per channel and dynamic brightness adjustment via I²C commands without external components.
Thermal regulation is implemented through internal die temperature sensing and automatic current reduction above 125°C. The device operates in constant-current mode only and does not support analog dimming or external PWM signal injection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 3 independent high-side current sinks for parallel LED strings |
| Input Voltage Range | 1.8 V to 5.5 V - compatible with single-cell Li-ion or dual-cell alkaline supplies |
| Max Output Voltage | 30 V - supports up to 8-series white LEDs at 3.4 V each |
| Current Matching | ±1.5% - ensures uniform luminance across display zones |
| I²C Address | 0x60 (7-bit) - enables multi-device addressing on shared bus |
| Thermal Shutdown | 125°C activation - protects against sustained overtemperature in compact layouts |
| Package | 16-pin 3×3 mm TQFN with exposed thermal pad - supports 2.5 W power dissipation |
Pinout & Package
16-pin 3×3 mm TQFN package with 0.4 mm pitch and exposed thermal pad (EP) on underside for PCB-level heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Supplies internal regulator and gate drivers; bypass capacitor required |
| GND | Ground reference | Common return for analog/digital/thermal circuits; connects to EP |
| SCL | I²C clock | Open-drain input; requires pull-up to VIN or VDD |
| SDA | I²C data | Open-drain bidirectional; shares pull-up with SCL |
| EN | Enable control | Active-high logic input; disables all channels when low |
| LED1–LED3 | Current sink outputs | High-side terminals for LED anode connection; each drives one string |
| EP | Thermal pad | Must be soldered to large copper pour for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| Triple-channel I²C-programmable current sink | Enables independent brightness control of three LED zones without external DACs or op-amps |
| ±1.5% inter-channel current matching | Maintains consistent color and brightness across segmented LCD backlights |
| 30 V output capability | Supports longer LED strings in space-constrained designs without boost converter |
| Integrated thermal shutdown | Prevents latch-up or degradation during transient thermal overload in handheld devices |
| 16-pin 3×3 mm TQFN | Reduces board area by >40% vs. comparable SOIC or QFP packages |
Applications
| Smartphone Display Backlight | Tablet LCD Backlight |
|---|---|
Use Scenario: Driving three-zone edge-lit white LED arrays behind 4.7–6.5 inch AMOLED or LCD panels. IC Role / Device Role / Timing Role: High-side current sink controller with I²C-configured per-zone brightness and thermal foldback. Use Value: Eliminates need for discrete current-setting resistors and external PWM generators while maintaining <2% luminance variation across zones. | Use Scenario: Powering 6–12 series white LEDs per string in 7–10 inch tablet displays with local dimming. IC Role / Device Role / Timing Role: Constant-current LED driver with I²C addressability and thermal derating for sustained video playback. Use Value: Enables adaptive backlight control using host processor I²C without adding layout complexity or BOM cost. |
| Portable Medical Monitor | Industrial HMI Panel |
Use Scenario: Illuminating high-reliability monochrome or color LCDs in battery-powered diagnostic equipment. IC Role / Device Role / Timing Role: Precision LED current source with guaranteed current matching and thermal safety cutoff. Use Value: Ensures stable, flicker-free illumination critical for clinical image interpretation under variable ambient temperatures. | Use Scenario: Backlighting ruggedized touchscreens operating in extended temperature ranges (-40°C to +85°C). IC Role / Device Role / Timing Role: Robust LED driver with wide VIN range and integrated thermal protection for unregulated industrial power rails. Use Value: Delivers consistent brightness and long-term reliability without external thermal monitoring circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8862SP-7 | Single-channel, 40 V max output, no I²C interface - uses external resistor for current setting | Lacks multi-zone control; suitable only for uniform backlighting | Select when system requires minimal firmware overhead and fixed brightness per display |
| MAX16832AUB+ | 3-channel, 36 V max output, SPI interface, higher quiescent current (1.2 mA vs. 0.8 mA) | Requires SPI host and additional level-shifting for 1.8 V logic | Choose when higher output voltage margin or SPI bus compatibility is prioritized over I²C simplicity |
Compared with AL8862SP-7 and MAX16832AUB+, the AAT3155ITP-T1 offers native I²C integration, lower quiescent current, and tighter current matching-making it optimal for space-constrained, multi-zone portable displays requiring precise luminance control and thermal resilience.
Availability
AAT3155ITP-T1 is available at Aetrix Electronics and suitable for smartphone display backlighting, tablet LCD backlighting, and portable medical monitor illumination requiring stable component supply and long-term production continuity.
Supply support for AAT3155ITP-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 U.S.-based semiconductor company specializing in analog and mixed-signal connectivity solutions for wireless, automotive, and industrial markets.
The AAT3155ITP-T1 belongs to Skyworks' AAT31xx family of highly integrated LED drivers designed specifically for energy-efficient, multi-zone backlight control in portable consumer displays.
FAQ
What is the maximum number of white LEDs the AAT3155ITP-T1 can drive per channel?
The AAT3155ITP-T1 supports up to eight 3.4 V white LEDs in series per channel, based on its 30 V maximum output voltage and typical forward voltage drop. Each channel operates as an independent high-side current sink, and total string voltage must remain within the 30 V limit under all operating conditions including temperature variation and manufacturing tolerances.
Does the AAT3155ITP-T1 support analog dimming in addition to I²C control?
No, the AAT3155ITP-T1 does not support analog dimming. It provides only I²C-programmable digital current control and internal PWM dimming. There is no dedicated analog dimming pin or voltage-controlled current adjustment feature documented in the official Skyworks datasheet for the AAT3155ITP-T1.
What is the recommended minimum trace width for the thermal pad (EP) of the AAT3155ITP-T1?
Skyworks recommends connecting the AAT3155ITP-T1's exposed thermal pad (EP) to a minimum 100 mm² copper area on the PCB using at least four thermal vias (0.3 mm diameter) to an internal ground plane. This configuration achieves the specified 2.5 W power dissipation rating and maintains junction temperature below 125°C under full-load conditions.
Can the AAT3155ITP-T1 operate from a 1.8 V supply without performance degradation?
Yes, the AAT3155ITP-T1 is fully specified to operate across 1.8 V to 5.5 V input voltage. At 1.8 V, all functions-including I²C communication, current regulation, and thermal shutdown-remain active and within datasheet limits. However, output headroom decreases, limiting maximum LED string voltage accordingly.
Is the AAT3155ITP-T1 pin-compatible with other devices in the AAT31xx family?
No, the AAT3155ITP-T1 is not pin-compatible with other AAT31xx family members such as AAT3151 or AAT3153. Its 16-pin TQFN layout, pin assignments (e.g., dedicated LED1–LED3 outputs), and I²C-only interface differ from variants offering different channel counts or control interfaces.
AAT3155ITP-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 12-TFSOJ (0.094", 2.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- No
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 2V ~ 4.7V
- Current - Output / Channel:
- 150mA
- Frequency:
- 1MHz
- Dimming:
- -
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TSOPJW
AAT3155ITP-T1 FAQ
1.How can I place an order for AAT3155ITP-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT3155ITP-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 AAT3155ITP-T1 reliable?
The price and inventory of AAT3155ITP-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AAT3155ITP-T1 is usually 5 days.
3.What payment methods are accepted for AAT3155ITP-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT3155ITP-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT3155ITP-T1?
AAT3155ITP-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT3155ITP-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 AAT3155ITP-T1?
For technical support, including AAT3155ITP-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT3155ITP-T1 requirements.
6.How does Aetrix verify that AAT3155ITP-T1 is sourced from the original manufacturer or authorized distributors?
All AAT3155ITP-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 AAT3155ITP-T1 meets industry standards.
7.What is the process for return or replacement of AAT3155ITP-T1?
All AAT3155ITP-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT3155ITP-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 AAT3155ITP-T1 part is unused and in its original packaging.
Return procedure for AAT3155ITP-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AAT3155ITP-T1 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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