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AL8841WT-7
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Product Detailed Parameters
- Description：LINEAR IC
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR)
- Type：DC DC Regulator
- Topology：Step-Down (Buck)
- Internal Switch(s)：Yes
- Number of Outputs：1
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：40V
- Voltage - Output：-
- Current - Output / Channel：1A
- Frequency：250kHz ~ 1MHz
- Dimming：Analog, PWM
- Applications：Lighting, Signage
- Operating Temperature：-40°C ~ 105°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-5 Thin, TSOT-23-5
- Supplier Device Package：TSOT-25
- Grade：-
- Qualification：-
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Overview
The AL8841WT-7 is a hysteresis mode DC-DC step-down converter designed for driving single or multiple series-connected LEDs. It operates with an input voltage range of 4.5 V to 40 V and supports an output current of 1 A. The device features a fixed switching frequency of 250 kHz, though it can extend up to 1 MHz. It offers PWM and analog dimming capabilities. The component is housed in a TSOT-25-5 package and is rated for operation between -40°C and +125°C.
Feature Summary
- Hysteresis mode control for efficient LED driving
- Integrated internal switch
- Supports both PWM and analog dimming methods
Applications
- General lighting systems
- LED signage
- Automotive lighting applications
Procurement Notes
Verify the specific suffix 'WT-7' against official Diodes Incorporated documentation to confirm packaging details such as reel size or tape-and-reel specifications. Ensure the operating temperature range requirements align with the specified limits. Confirm RoHS compliance status through the manufacturer's latest certification documents before finalizing procurement decisions.
Selection Notes
Select this component when a compact buck topology is required for high-efficiency LED regulation. The integrated switch simplifies design by reducing external component count. Consider the thermal performance within the TSOT-25-5 package relative to the expected load current. Verify that the input voltage source remains within the 4.5 V to 40 V operational window for stable hysteresis mode function.
Part Context
This part belongs to the AL8841Q automotive-grade series from Diodes Incorporated. It is specifically engineered for reliable performance in demanding environments. The series utilizes advanced hysteresis control techniques to maintain constant current without requiring complex feedback loops, making it suitable for space-constrained LED driver designs.
Replacement Considerations
The AL8861WT-7 is a related variant offering higher output current capacity. Verify pin compatibility and thermal characteristics when substituting. Consult official cross-reference guides to ensure functional equivalence in terms of switching frequency and dimming interface support.
