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Product Detailed Parameters
- Description：IC LED DRVR RGLTR PWM 30MA 16QFN
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Regulator
- Topology：Switched Capacitor (Charge Pump)
- Internal Switch(s)：Yes
- Number of Outputs：4
- Voltage - Supply (Min)：2.7V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：-
- Current - Output / Channel：30mA
- Frequency：1MHz
- Dimming：PWM
- Applications：Backlight, Camera Flash
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-WFQFN Exposed Pad
- Supplier Device Package：16-QFN/MLP (3x3)
- Grade：-
- Qualification：-
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Overview
The A8435EESTR-T is a high-efficiency charge pump white LED driver manufactured by Allegro MicroSystems. It functions as a DC-DC regulator with four outputs, utilizing switched capacitor technology to drive white LEDs in portable electronic displays. The device supports PWM dimming and delivers up to 30mA per output. It operates within a supply voltage range of 2.3V to 5.5V and is housed in a 16-QFN/MLP package. This component is designed for cost-effective lighting solutions in mobile devices.
Feature Summary
- High-efficiency charge pump architecture for white LED driving
- Four independent output channels for multi-segment display control
- Supports PWM dimming for brightness adjustment
- Integrated DC-DC regulation for stable LED current
Applications
- Portable electronic display backlights
- Mobile device indicator lighting
- Camera flash capacitor charging (related family applications)
- Signage LED arrays
Procurement Notes
Verify component status carefully before procurement. Official documentation indicates the A8435EESTR-T is no longer in production. Samples are unavailable, and the device should not be purchased for new design applications. Ensure existing inventory meets quality standards if used in maintenance or legacy repairs. Confirm package integrity and pin compatibility with existing PCB layouts due to end-of-life status.
Selection Notes
Select this component only for legacy system maintenance or repair where original specifications must be maintained. For new designs, consider alternative Allegro LED drivers currently in active production. Evaluate power efficiency requirements against the charge pump topology limitations. Ensure input voltage ranges align with the 2.3V to 5.5V operational window. Verify thermal management capabilities within the 16-QFN package constraints for the intended application environment.
Part Context
The A8435EESTR-T belongs to Allegro MicroSystems' portfolio of LED driver integrated circuits. It is part of a series designed for portable electronics, emphasizing low cost and high efficiency. The device utilizes charge pump technology to boost voltage for white LED strings. It complements other Allegro power management solutions for mobile devices. The product line focuses on simplifying LED control in space-constrained applications.
Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation. Due to the discontinued status, direct replacements may require functional equivalence analysis with newer Allegro models or third-party equivalents. Consult official Allegro resources for current recommended alternatives for new designs.
