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MAX6948B Datasheet High-Efficiency PWM LED Driver

Manufacturer: Maxim Integrated (now Analog Devices)

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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.

Overview

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.

Key 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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