MAX1848
MAX1848
PRODUCTIONWhite LED Step-Up Converter in SOT23
Current Regulated Step-Up Converter Powers White LEDs with Uniform Brightness
- Part Models
- 2
- 1ku List Price
- Starting From $2.19
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Overview
- Constant Current Regulation for Uniform Illumination
- High 87% Efficiency
- Analog or Logic Control of LED Intensity
- 0.8W Output Power with Internal High-Voltage MOSFET Switch
- Small, Low-Profile External Components
- 2.6V to 5.5V Input Range
- 13V Maximum Output with Overvoltage Protection
- Optimized for Low Input Ripple
- Programmable Soft-Start
- 0.3µA Shutdown Current
- Small 8-pin Thin QFN (3mm x 3mm) and 8-Pin SOT23 Packages
The MAX1848 drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. The step-up converter topology allows series connection of the white LEDs so that the LED currents are identical for uniform brightness. This configuration eliminates the need for ballast resistors and expensive factory calibration. Other benefits include greater simplicity, lower cost, higher efficiency, and greater reliability.
This step-up PWM converter includes an internal, high-voltage, low RDSON N-channel MOSFET switch for high efficiency and maximum battery life. A single analog voltage Dual Mode™ input provides a simple means of brightness adjustment and on/off control. Fast 1.2MHz current-mode PWM control allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Programmable soft-start eliminates inrush current during startup.
The MAX1848 is available in space-saving 8-pin thin QFN (3mm x 3mm) and 8-pin SOT23 packages.
Applications
- Cell Phones/Smartphones
- e-Books and Subnotebooks
- PDAs, Palmtops, and Wireless Handhelds
- White LED Display Backlighting
Documentation
Data Sheet 1
Design Note 2
Technical Articles 10
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1848ETA+ | Thin Dual Flatpack No Leads, Exposed Pad | ||
| MAX1848ETA+T | Thin Dual Flatpack No Leads, Exposed Pad |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| LED Drivers 1 | ||
| MAX1698 | PRODUCTION | High-Efficiency Step-Up Current Regulator for LEDs |
Evaluation Kits
Evaluation Kit for the MAX1848
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