厂商：Freescale
类别：16位单片机
厂商：TDK
类别：平衡器
厂商：BYD
类别：功率MOSFET
厂商：Murata
类别：DC/DC 转换器
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：Nichicon
类别：薄膜电容
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特点Two 8-Bit Current DACsDACs Guaranteed MonotonicKnown IC State on Power-UpSerial Interface Watchdog Timer with Disable 2-Wire Serial Interface Compatible with I 2 C? and SMBus 2 Programmable Fan Tachometer Interfaces4 Programmable General Purpose I/OsSmall 16-Pin SSOP PackageSingle 2.7V to 5.75V Supply OperationFault Output SignalStatus RegisterFan Blasting FunctionNine Addresses Using Two Programming Lines典型应用描述The LTC?1840 is a fan controller with two 8-bit current output DACs, two tachometer interfaces, and four general purpose I/O (GPIO) pins. It operates from a single supply with a range of 2.7V to 5.75V. A current output DAC is used to control an external switching regulator, which controls the fan speed. A current output DAC and tachometer allow a controller to form a closed control loop on fan velocity. The GPIO pins can be used as digital inputs or open drain pull-down outputs.The part features a simple 2-wire I2C and SMBus compatible serial interface that allows communication between many devices. The interface includes a fault status register that reflects the state of the part and which can be polled to find the cause of a fault condition. Other operational characteristics of the part, such as DAC output currents, GPIO modes, and tachometer frequency, are also programmed through the serial interface. Two address pins provide nine possible device addresses.The BLAST pin is provided to force the DAC output currents to program the maximum regulator output voltages through a single pin and gate the operation of the serial access timer.