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RGB and white LED driver

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article image MAX6965 RGB and white LED driver.

MAXIM Integrated Products, represented by Arrow , has introduced the MAX6965 RGB and white LED driver.

Through a 400kHz, two-wire, SMBus-/I2C-compatible serial interface, the MAX6965 provides nine 7V-tolerant output ports, each capable of sinking up to 50mA.

A reset input, RST-bar, clears the serial interface and restores the outputs to their default power-up state of high impedance. With low standby current and packaged in compact 3mm x 3mm x 0.8mm, 16-pin QFN and QSOP packages, this LED driver is suitable for portable applications.

The MAX6965's eight bit PWM brightness control is integrated within the chip.

Four bits control the global intensity of all LED outputs from fully off to fully on, making brightness ramp up and down simple. The remaining four bits further break down the globally set current into 16 steps of brightness control for each individual LED. Alternatively, a single eight bit control can set all outputs at once with 240 intensity steps.

Each output has independent two phase blink functionality. Ports can be configured to be off or on during each blink phase or to ignore the blink control. Blink period is controlled by a clock input (up to 1kHz) on the BLINK pin or by a register. The blink input operates as a logic control to turn the LEDs on and off or as a general-purpose input (GPI).

The MAX6965 has one address pin that provides four unique slave IDs. These devices operate from a 2.0V to 3.6V supply over the automotive temperature range (-40°C to +125°C) with a supply current (interface running, PWM enabled) of 51μA and a standby current of 1.2μA

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