/RST、240ステップPWM輝度制御、及び2相ブリンクを備えた省スペース、17出力LEDドライバ
SUNNYVALE, CA-March 11, 2004-Maxim Integrated Products
(NASDAQ: MXIM) introduces the MAX6964 RGB and white LED driver. Through a 400kHz, 2-wire, SMBus™/I2C™-compatible serial interface, the MAX6964 provides µPs and µCs with seventeen 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 4mm x 4mm, 24-pin QFN and QSOP packages, this LED driver is ideal for portable applications.
The MAX6964's 8-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, simplifying brightness ramp up and down. The remaining four bits further break down the globally set current into 16 steps of brightness control for each individual LED. Alternatively, a single 8-bit control can set all outputs at once with 240 intensity steps.
Each output has independent 2-phase blink functionality. Ports can be individually configured to be off or on during each blink phase or to ignore the blink control. The 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 MAX6964 has one address pin that provides four unique slave IDs. It operates from a 2.0V to 3.6V supply over the automotive temperature range (-40°C to +125°C) with a supply current of 7µA (typ) and a standby current of 1.2µA (typ). Prices start at $1.95 (1000-up, FOB USA).
SMBus is a trademark of Intel Corporation.
Purchase of I2C components from Maxim Integrated Products, Inc., or one of its sublicensed Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.
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