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EMC1704 Datasheet(PDF) 1 Page - Microchip Technology |
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EMC1704 Datasheet(HTML) 1 Page - Microchip Technology |
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1 / 68 page  EMC1704 DATASHEET DS20005239A Datasheet PRODUCT FEATURES EMC1704 High-Side Current-Sense and Multiple 1°C Temperature Monitor General Description The EMC1704 is a combination high-side current sensing device with precision temperature measurement. It measures the voltage developed across an external sense resistor to represent the high-side current of a battery or voltage regulator. It also measures the source voltage and uses these measured values to present a proportional power calculation. The EMC1704 contains additional bi- directional peak detection circuitry to flag instantaneous current spikes with programmable time duration and magnitude threshold. Finally, the EMC1704 includes up to three (3) external diode channels and an internal temperature sensor for temperature measurement. The temperature measurement includes advanced features such as Resistance Error Correction (REC), Beta Compensation (to support CPU diodes requiring the BJT/ tr ansi s to r m o d e l in c ludi ng 45nm a nd 65 nm processors), and automatic diode type detection. Both current sensing and temperature monitoring include two tiers of protection: one that can be masked and causes the ALERT pin to be asserted, and the other that cannot be masked and causes the THERM pin to be asserted. Applications Notebook and Desktop Computers Industrial Power Management Systems Embedded Applications Features High-side current sensor — Bi-directional current measurement — Measures source voltage and indicates power ratio — 1% current measurement accuracy — Integrated over 82ms to 2.6sec with 11-bit resolution — 3V to 24V bus voltage range Independent hardware set instantaneous current peak detector (EMC1704-2 only) — Software controls to program time duration and magnitude threshold Power supply options — Bus or separately powered for low voltage operation Wide temperature operating range: -40°C to +85°C Up to three external temperature monitors — 1°C accuracy (20°C < TDIODE < 110°C) with 0.125°C resolution — Ideality factor setting — Support for 45nm and 65nm CPU diodes requiring the BJT/transistor model w/ beta compensation — Determines external diode type and optimal settings — Resistance Error Correction — Anti-parallel diode support for additional diode options Internal temperature monitor — ±1°C accuracy (-5°C < TA < 85°C) ALERT and THERM outputs for temperature, voltage, and out-of-current limit reporting SMBus 2.0 interface — Pin-selectable SMBus Address — Block Read and Write General Purpose I/O Available in a RoHS Compliant Package: 14-pin SOIC (EMC1704-1) or 16-pin 4mm x 4mm QFN (EMC1704-2) Block Diagram Analog Mux External Temp Diodes Internal Temp Diode SMBus Slave Protocol DP1 DN1 SMCLK SMDATA DP2 / DN3 DN2 / DP3 ADDR_SEL Anti- parallel diode Peak Detection * EMC1704-2 only Voltage and Temp Registers Configuration 11-15 bit ??? ADC 13 - 15 bit ??? ADC Current Registers Current Limits Voltage and Temp Limits THERM ALERT Power Register |
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