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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 bus voltage and uses these measured values to present a proportional power calculation. The EMC1704 contains additional bidirectional 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/transistor model including 45nm and 65nm 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.
Features
High-side current sensor
Bi-directional current measurement
Measures bus voltage
1% current measurement accuracy
Integrated over 82ms to 2.6sec with 11-bit resolution
3V to 24V voltage bus voltage range
Calculates proportional power
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 with 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
I2C/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)
Applications
Notebook and Desktop Computers
Industrial
Power Management Systems
Embedded Applications
EMC1704-2 封装图
EMC1704-2 封装图
| 型号 | 制造商 | 描述 | 购买 |
|---|---|---|---|
| EMC1704-2-AP-TR | Viking | 贴片电阻 0603 110KΩ ±1% 1/10W ±25ppm/℃ | 立即购买 |
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