MAX8648
MAX8648
ObsoleteUltra-Efficient Charge Pumps for Six White/RGB LEDs in 3mm x 3mm Thin QFN
Achieves Industry's Highest Efficiency Using the Industry's First Negative Charge Pump Driving Six White/RGB LEDs Independently
- Part Models
- 1
- 1ku List Price
- price unavailable
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Overview
- Six Adaptive Current Regulators
- Independent Voltage Supply for Each LED
- Individual LED Brightness Control (MAX8647)
- 24mA to 0.1mA Dimming Range
- I²C Interface (MAX8647)
- Serial-Pulse Dimming Logic (MAX8648)
- ±2% Accuracy, ±0.4% Matching (typ)
- Low 70µA Quiescent Current
- Low 1µA Shutdown Current
- Inrush Current Limit
- TA Derating Function Protects LEDs
- 16-Pin, 3mm x 3mm Thin QFN Package
The MAX8647/MAX8648 drive up to six white LEDs or two sets of RGB LEDs with regulated constant current for display backlight and fun light applications. By utilizing an inverting charge pump and extremely low-dropout adaptive current regulators, these ICs achieve very high efficiency over the full 1-cell Li+ battery voltage range and even with large LED forward voltage mismatch. The 1MHz fixed-frequency switching allows for tiny external components. The regulation scheme is optimized to ensure low EMI and low input ripple. The MAX8647/MAX8648 include thermal shutdown, open- and short-circuit protection.
The MAX8647 features an I²C serial port, while the MAX8648 features a three-wire serial-pulse logic interface. Both devices support independent on/off and dimming for main and subbacklights. The dimming ranges are pseudo-logarithmic from 24mA to 0.1mA and off in 32 steps. Both devices include a temperature derating function to safely allow bright 24mA full-scale output current setting while automatically reducing current to protect LEDs at high ambient temperatures above +60°C.
The MAX8647/MAX8648 are available in a 16-pin,
Applications
- Camera Flash or RGB Indicators
- Cellular Phones and Smartphones
- PDAs, Digital Cameras, and Camcorders
- White LED Backlighting, Single or Dual Display
- Wide-Gamut RGB LED Display Backlighting
Documentation
Data Sheet 1
Technical Articles 1
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 |
|---|---|---|---|
| MAX8648ETE+ | 16-LFCSP-3X3X0.75 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Dec 13, 2013 - 1355 MECHANICAL DATASHEET |
||
| MAX8648ETE+ | Obsolete | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| LED Drivers 11 | ||
| MAX1578 | Obsolete | Complete Bias and White LED Power Supplies for Small TFT Displays |
| MAX1576 | PRODUCTION | 480mA White LED 1x/1.5x/2x Charge Pump for Backlighting and Camera Flash |
| MAX8596 | Obsolete | High-Efficiency, 36V Step-Up Converters with TA Derating Option for 2 to 9 White LEDs |
| MAX8595 | LAST TIME BUY | High-Efficiency, 36V Step-Up Converters with TA Derating Option for 2 to 9 White LEDs |
| MAX1561 | PRODUCTION | High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs |
| MAX1599 | PRODUCTION | High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs |
| MAX1574 | PRODUCTION | 180mA, 1x/2x, White LED Charge Pump in 3mm x 3mm TDFN |
| MAX1573 | PRODUCTION | White LED 1x/1.5x Charge Pump in UCSP and Thin QFN |
| MAX1582 | Obsolete | High-Efficiency Step-Up Converters for White LED Main and Subdisplay Backlighting |
| MAX1848 | PRODUCTION | White LED Step-Up Converter in SOT23 |
| MAX1575 | Obsolete | White LED 1x/1.5x Charge Pump for Main and Sub-Displays |
Evaluation Kits
MAX8648 Evaluation Kit
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