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MAX8790A - Six-String White LED Driver

General Description

The MAX8790A is a high-efficiency driver for white lightemitting diodes (LEDs).

It is designed for large liquidcrystal displays (LCDs) that employ an array of LEDs as the light source.

A current-mode step-up controller drives up to six parallel strings of multiple series-connected LEDs.

Key Features

  • to protect the controller from fault conditions. Separate feedback loops limit the output voltage if one or more LEDs fail open or short. The controller features cycle-by-cycle current limit to provide consistent operation and soft-start capability. A thermal-shutdown circuit provides another level of protection. The step-up controller uses an external MOSFET, which provides good efficiency and allows for scalable output power and maximum operating voltage. Low feedback voltage at each LED strin.

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Other Datasheets by Maxim Integrated (now Analog Devices)

Part Number Description
MAX8790 Six-String White LED Driver
MAX8791 Single-Phase Synchronous MOSFET Driver
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-0989; Rev 0; 10/07 KIT ATION EVALU E L B A AVAIL Six-String White LED Driver with Active Current Balancing for LCD Panel Applications General Description The MAX8790A is a high-efficiency driver for white lightemitting diodes (LEDs). It is designed for large liquidcrystal displays (LCDs) that employ an array of LEDs as the light source. A current-mode step-up controller drives up to six parallel strings of multiple series-connected LEDs. Each string is terminated with ballast that achieves ±1.5% current regulation accuracy, ensuring even brightness for all LEDs. The MAX8790A has a wide input-voltage range from 4.5V to 26V, and provides a fixed 20mA or adjustable 15mA to 27mA full-scale LED current. The MAX8790A has two dimming control modes to enable a wide variety of applications.