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EMC1701 Datasheet(PDF) 1 Page - SMSC Corporation |
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EMC1701 Datasheet(HTML) 1 Page - SMSC Corporation |
1 / 54 page SMSC EMC1701 DATASHEET Revision 1.2 (09-27-10) Datasheet PRODUCT FEATURES EMC1701 High-Side Current-Sense and Internal 1°C Temperature Monitor General Description The EMC1701 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. The EMC1701 also measures the source voltage and uses these measured values to present a proportional power calculation. The EMC1701 contains additional bi-directional peak detection circuitry to flag instantaneous current spikes with programmable time duration and magnitude threshold. Finally, the EMC1701 includes an internal diode channel for ambient temperature measurement. 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 (EMC1701-1 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 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 Available in a 12-pin 4mm x 4mm QFN RoHS Compliant Package (EMC1701-1) Available in a 10-pin MSOP RoHS Compliant Package (EMC1701-2) Block Diagram Analog Mux Internal Temp Diode SMBus Slave Protocol SMCLK SMDATA ADDR_SEL Peak Detection Voltage and Temp Registers Configuration 11 - 15 bit Σ Δ ADC 13 - 15 bit Σ Δ ADC Current Registers Current Limits Voltage and Temp Limits THERM ALERT Power Register *EMC1701-1 only |
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