F75133
1. General Description
The F75133S is a “Loading Gauge IC”. Loading detection and current monitor are the major applications
of the F75133S. The F75133S is following the PWM signal change of duty cycle to react related functions for
user application. For instance, the F75133S can be used to sense CPU loading for FAN speed control to cool
down the temperature of CPU surface. It also can be used to implement Over/Under-Clocking and
Over/Under-Voltage (Vcore) with higher performance/Lower power consumption. Anyway, the F75133S can be
implemented by user differential application.
In the past, if engineer would like to measure the parts consumption. He could connect a resistance
between power and parts, and then they detected ∆V and capitalized the value to understand the loading
condition. Although the method is convenient and needs just a cheap resistance, but some of the accuracy
issues and power consumption problem will be the critical points. For example, the resistance will cause more
consumption and heat questions if the end-equipment needs mass current to implement. Depends on these
problems, more accuracy and more efficiency sensor chip is necessary. The F75133S will handle previous
trouble.
The F75133S supports automatic PWM duty cycle detection, follows the result of detection to issue
TURBO#、FAULT# and PME# signals for end-application, provides I2C interface for communication, the
programmable Cycle-Length of detection rise the measurement accuracy.
The F75133S is packaged in 8-pin SOP and powered by 3.3V.
2. Feature List
Automatic PWM Duty Cycle Detect
Follows the Result of Detection to Issue TURBO#、FAULT# and PME# Signals for End-application
Programmable Cycle-Length of Detection for Flexible Use and Accuracy
4 Steps 5 Stages Over-Clocking Machine
Un-Hysteresis Function for CPU Over/Under-Clocking/Voltage Implementation
Internal Oscillator for System Implement.
2-Wire I2C Interface
3.3V operation voltage.
8-pin SOP package.
3. Key Specification
Supply Voltage
Operating Supply Current
3.0V to 3.6V
2 mA typ.
Noted: Patented TWI235553
-1-
2007
V0.28P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
