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Product Detailed Parameters
- Description：IC LED DRVR RGLTR PWM 1A TSOT25
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Regulator
- Topology：Step-Down (Buck)
- Internal Switch(s)：Yes
- Number of Outputs：1
- Voltage - Supply (Min)：6V
- Voltage - Supply (Max)：40V
- Voltage - Output：-
- Current - Output / Channel：1A
- Frequency：233kHz ~ 1MHz
- Dimming：Analog, PWM
- Applications：Backlight, Lighting, Signage
- Operating Temperature：-40°C ~ 85°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 PAM2861ABR is a single-channel LED lighting driver IC from Diodes Incorporated, designed for high-efficiency constant current regulation. It operates as a buck converter with an integrated power switch, supporting an input voltage range of 6 V to 40 V and delivering up to 1 A output current. The device features adjustable switching frequencies between 233 kHz and 1 MHz, enabling optimization for external component size and efficiency. It includes PWM dimming capability and open LED protection for enhanced system reliability.
Feature Summary
- Integrates a high-side power switch for compact design
- Supports wide input voltage range for flexible power supply options
- Enables precise LED brightness control via PWM dimming interface
- Provides internal protection against open LED conditions
Applications
- General solid-state lighting fixtures
- LED downlights and panel lights
- Commercial linear lighting systems
- Industrial LED illumination modules
Procurement Notes
Verify the specific suffix 'ABR' corresponds to the required tape-and-reel packaging configuration and temperature grade. Confirm that the 1 A continuous current rating aligns with the thermal management capabilities of the target PCB layout. Ensure the selected operating frequency falls within the specified 233 kHz to 1 MHz range for optimal inductor selection.
Selection Notes
Select this component when a buck topology is suitable for step-down applications from higher bus voltages. The integrated switch eliminates the need for external MOSFETs, reducing bill of materials cost. Consider the SOT-89-5 package thermal performance for high-current designs. Verify compatibility with the desired dimming control scheme before finalizing the schematic.
Part Context
This part belongs to the PAM2861 series of LED drivers, which are optimized for general lighting applications. The series offers various package and suffix options to accommodate different manufacturing and environmental requirements. It serves as a core component in modern LED ballast designs, replacing traditional magnetic or complex electronic drivers.
Replacement Considerations
Direct substitutes include PAM2861CBR, which shares identical electrical specifications but may differ in packaging or reel quantity. Cross-reference pinouts and thermal characteristics carefully when transitioning between variants within the same family.
