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PDF EMC1704 Data sheet ( Hoja de datos )
| Número de pieza | EMC1704 | |
| Descripción | High-Side Current-Sense and Multiple Temperature Monitor | |
| Fabricantes | Microchip | |
| Logotipo |  |
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EMC1704
High-Side Current-Sense and Multiple
1°C Temperature Monitor
PRODUCT FEATURES
Datasheet
General Description
Features
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/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.
Applications
Notebook and Desktop Computers
Industrial
Power Management Systems
Embedded Applications
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
EMC1704
DP1
DN1
DP2 / DN3
DN2 / DP3
External
Temp
Diodes
Anti-
parallel
diode
Internal
Temp
Diode
Analog
Mux
* EMC1704-2 only
Peak
Detection
13 - 15 bit
? ? ADC
Configuration
11-15 bit
? ? ADC
Current Limits
Current Registers
Power Register
Voltage and
Temp Registers
Voltage and
Temp Limits
DATASHEET
SMBus
Slave
Protocol
ADDR_SEL
SMCLK
SMDATA
ALERT
THERM
DS20005239A
1 page  
High-Side Current-Sense and Multiple 1°C Temperature Monitor
Datasheet
5.7 Temperature Limit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.8 One-Shot Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.9 Tcrit Limit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.10 External Diode Fault Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.11 Channel Mask Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.12 Consecutive Alert Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.13 Beta Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5.14 External Diode Ideality Factor Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.15 High Limit Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.16 Low Limit Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.17 Crit Limit Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.18 Averaging Control Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
5.19 Voltage Sampling Configuration Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.20 Current Sense Sampling Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
5.21 Peak Detection Configuration Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.22 Sense Voltage Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
5.23 Source Voltage Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
5.24 Power Ratio Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
5.25 VSENSE Limit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
5.26 Source Voltage Limit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
5.27 Critical Voltage Limit Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
5.28 GPIO Config and Status Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
5.29 Product Features Register (EMC1704-2 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
5.30 Product ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
5.31 SMSC ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
5.32 Revision Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Chapter 6 Package Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
6.1 EMC1704-1 Package Drawing (14-Pin SOIC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
6.2 EMC1704-2 Package Drawing (16-Pin QFN 4mm x 4mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
6.3 EMC1704 Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Chapter 7 Datasheet Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
DS20005239A
5
DATASHEET
EMC1704
5 Page 
PIN
NUMBER
EMC1704-1
8
9
10
11
12
13
n/a
n/a
14
1
High-Side Current-Sense and Multiple 1°C Temperature Monitor
Datasheet
Table 1.1 Pin Description for EMC1704-X (continued)
PIN
NUMBER
EMC1704-2
7
8
9
10
11
12
13
14
15
16
PIN NAME
GPIO
GND
THERM
ALERT
SMDATA
SMCLK
DUR_SEL
TH_SEL
SENSE-
SENSE+
PIN FUNCTION
GPI - General Purpose Input
GPO - Open Drain General Purpose
output
Ground
Active low output - requires pull-up
resistor
Active low output - requires pull-up
resistor
SMBus data input/output - requires
external pull-up resistor
SMBus clock input - requires
external pull-up resistor
Selects peak detector duration
Selects peak detector threshold
Negative current sense measurement
point
Positive current sense measurement
point
PIN TYPE
DI (5V)
OD (5V)
Power
OD (5V)
OD (5V)
DIOD (5V)
DI (5V)
AI
AI
AI (24V)
AI (24V)
The pin types are described in Table 1.2. All pins labeled with (5V) are 5V tolerant. All pins labeled
with (24V) are 24V tolerant.
Table 1.2 Pin Types
PIN TYPE
Power
AI
AIO
OD
DI
DIOD
DESCRIPTION
This pin is used to supply power or ground to the device.
Analog Input - this pin is used as an input for analog
signals.
Analog Input / Output - this pin is used as an I/O for
analog signals.
Open Drain Digital Output - this pin is used as a digital
output. It is open drain and requires a pull-up resistor.
This pin is 5V tolerant.
Digital Input - this pin is used for digital inputs. This pin is
5V tolerant.
Open Drain Digital Input / Output - this pin is bi-directional.
It is open drain and requires a pull-up resistor. This pin is
5V tolerant.
DS20005239A
11
DATASHEET
EMC1704
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EMC1704.PDF ] | |
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