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MAX6948B - High-Efficiency PWM LED Driver

Description

The MAX6948B general-purpose input/output (GPIO) peripheral drives a series string of white LEDs (WLEDs), and contains up to five general-purpose input/output (GPIO) ports to drive additional LEDs.

Features

  • shutdown and standby modes for low-power dissipation. The constant-current drivers contain programmable PWM outputs and allow staggering to reduce the input peak-current requirements. The I/O ports also feature ramp-up and ramp-down controls. The MAX6948B features a single input to select from four I2C slave addresses. Programming and functionality for the five GPIO ports is identical to the MAX6946/MAX6947 I/O expanders. www. DataSheet4U. com Features S 28V Step-Up DC-DC Converter with Integrat.

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Datasheet preview – MAX6948B

Datasheet Details

Part number MAX6948B
Manufacturer Maxim Integrated Products
File Size 897.52 KB
Description High-Efficiency PWM LED Driver
Datasheet download datasheet MAX6948B Datasheet
Additional preview pages of the MAX6948B datasheet.

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Full PDF Text Transcription

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19-4935; Rev 0; 9/09 TION KIT EVALUA BLE A IL A V A High-Efficiency PWM LED Driver with Boost Converter and Five Constant-Current GPIO Ports General Description The MAX6948B general-purpose input/output (GPIO) peripheral drives a series string of white LEDs (WLEDs), and contains up to five general-purpose input/output (GPIO) ports to drive additional LEDs. The integrated 2MHz boost converter minimizes the size and cost of external components and supplies 30mA of load current at up to 28V. The converter is stable under all load conditions from 5V up to 28V and includes open-circuit detection to prevent damage to the IC. An I2C-programmable 10-bit pulse-width modulation (PWM) signal enables 1024 levels of WLED intensity.
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