ADT7475ARQZ ON Semiconductor

ADT7475 Remote Thermal Monitor and Fan Controller The ADT7475 controller is a thermal monitor and multiple PWM fan controller for noise-sensitive or power-sensitive applications requiring active system cooling. The ADT7475 can drive a fan using ADT7475 SCL SDA SMBALERT ADT7475 SERIAL BUS INTERFACE PWM1 PWM REGISTERS ADDRESS ACOUSTIC AUTOMATIC AND PWM2 POINTER ENHANCEMENT FAN SPEED CONTROLLERS REGISTER CONTROL CONTROL PWM3 (HF & LF) PWM TACH1 CONFIGURATION TACH2 FAN SPEED REGISTERS COUNTER TACH3 TACH4 INTERRUPT MASKING PERFORMANCE MONITORING THERMAL THERM INTERRUPT PROTECTION STATUS REGISTERS V to ADT7475 CC V CC D1+ LIMIT INPUT D1 COMPARATORS 10-BIT SIGNAL D2+ ADC CONDITIONING D2 AND VALUE AND ANALOG V CCP MULTIPLEXER LIMIT BAND GAP BAND GAP REGISTERS TEMP. SENSOR REFERENCE GND Figure 1. Functional Block Diagram Table 1. ABSOLUTE MAXIMUM RATINGS Parameter Rating Unit Positive Supply Voltage (V ) 3.6 V CC Voltage on Any Input or Output Pin 0.3 to +3.6 V Input Current at Any Pin 5 mA Package Input Current 20 mA Maximum Junction Temperature (T ) 150 C J MAX Storage Temperature Range 65 to +150 C Lead Temperature, Soldering C IR Reflow Peak Temperature 260 Lead Temperature (Soldering, 10 sec) 300 ESD Rating 1,500 V Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. NOTE: This device is ESD sensitive. Use standard ESD precautions when handling. Table 2. THERMAL CHARACTERISTICS Package Type Unit JA JC 16-lead QSOP (Note 1) 150 39 C/W 1. is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. JA