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AL3157F-7
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Product Detailed Parameters
- Description：IC LED DRVR RGLTR DIM 30MA 12DFN
- Series：-
- Mfr：Diodes Incorporated
- 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, 210mA
- Frequency：1.2MHz
- Dimming：PWM
- Applications：Backlight
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：12-UFDFN Exposed Pad
- Supplier Device Package：U-DFN3030-12
- Grade：-
- Qualification：-
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Overview
The AL3157F-7 is a high-efficiency charge pump LED driver designed for small screen backlighting and flashlight applications. It operates as a low-noise, constant frequency DC/DC converter utilizing dual-mode load switching (1x) and voltage doubling (2x) topologies to drive white LEDs. The device supports an input voltage range of 2.7V to 5.5V and functions within a temperature range of -40°C to 85°C. Packaged in a 12DFN format, it integrates internal switches for compact system design.
Feature Summary
- Dual-mode operation combining 1x load switch and 2x voltage conversion for flexible LED driving
- Low noise and constant frequency architecture to minimize electromagnetic interference
- High efficiency charge pump topology optimized for battery-powered portable devices
Applications
- Small screen LCD backlighting systems
- Portable flashlight illumination circuits
- Battery-operated consumer electronics requiring efficient white LED drivers
Procurement Notes
Verify component status carefully as the AL3157F-7 is scheduled for obsolescence and will be discontinued by the manufacturer. Confirm availability through authorized distributors or check for active replacement alternatives before finalizing procurement plans. Ensure all ordering documentation reflects the current lifecycle status to avoid supply chain disruptions.
Selection Notes
Select this component for designs requiring efficient white LED driving from single-cell lithium batteries. The dual-mode capability allows optimization for different input voltage conditions. Consider the 12DFN package size for space-constrained PCB layouts. Evaluate thermal performance requirements against the specified operating temperature range during initial design phases.
Part Context
This part belongs to Diodes Incorporated's line of charge pump LED drivers. It serves as a specialized solution for portable display and lighting applications where power efficiency and low noise are critical. The device complements other LED driver families by offering specific voltage conversion modes tailored for small form factor electronics.
Replacement Considerations
Check for official successor parts from Diodes Incorporated due to the obsolescence notice. Evaluate alternative charge pump LED drivers with similar 1x/2x mode capabilities and compatible pinouts if direct replacements are unavailable.
