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PDF PAC1720 Data sheet ( Hoja de datos )
| Número de pieza | PAC1720 | |
| Descripción | Single and Dual High-Side Current-Sense Monitor | |
| Fabricantes | Microchip | |
| Logotipo |  |
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PAC1710/20
Single and Dual High-Side Current-Sense Monitor with
Power Calculation
Features
• Single and Dual High-Side Current Sensor
- Current measurement is integrated over 2.5 ms
to 2.6 seconds with up to 11-bit resolution
- 1% current measurement accuracy in
positive range
- Measures VSOURCE voltages
• Calculates Power
• VSOURCE Voltage Range 0V to 40V
• Bidirectional Current Sensing
• Auto-Zero Input Offset Voltage
• Digital Averaging
- Adjustable sampling time and resolution
• 5 µA Typical Standby Current
• Programmable Sense Voltage Range
- ±10 mV, ±20 mV, ±40 mV, and ±80 mV
• Power Supply Range 3.0V to 5.5V
• Wide Temperature Operating Range: -40°C to
+85°C
• ALERT Output for Voltage and Current out of
Limit Transients Between Sampling Interval
• SMBus 2.0 Communications Interface
- Block Read and Block Write
- Address selectable by resistor decode
• Sample Time Configurable from 2.5 ms to 320 ms
- With averaging effective sampling times up to
2.6 seconds
• 10-Lead 3 x 3 mm VDFN package
Applications
• Notebook and Desktop Computers
• Industrial
• Power Management Systems
• Embedded Applications
• Servers
Description
The PAC1710/20 are single and dual high-side
bidirectional current sensing monitors with precision
voltage measurement capabilities. Each sensor
measures the voltage developed across an external
sense resistor to represent the high-side current of a
battery or voltage regulator. The PAC1710/20 also
measures the SENSE+ pin voltage and calculates
average power over the integration period. The
PAC1710/20 can be programmed to assert the ALERT
pin when high and low limits are exceeded for Current
Sense and Bus Voltage.
The PAC1710/20 device is good for measuring
dynamic power. The long integration time allows for
extending system polling cycles without losing any
power consumption information. In addition the alert
ensures that transient events are captured between the
polling cycles.
Available in a RoHS compliant 3 x 3 mm 10-pin VDFN
package.
Package Types
PAC1710/20
3x3 VDFN*
SENSE1+ 1
SENSE1- 2
SENSE2+† 3
SENSE2-† 4
GND 5
10 VDD
9 SMCLK
EP
11
8 SMDATA
7 ALERT
6 ADDR_SEL
*Includes Exposed Thermal Pad (EP), see Table 3-1
†PAC1720 only.
2015-2016 Microchip Technology Inc.
DS20005386B-page 1
1 page  
PAC1710/20
TABLE 1-1: DC CHARACTERISTICS (CONTINUED)
Electrical Characteristics: Unless otherwise specified, maximum values are at TA = -40°C to +85°C,
VDD = 3V to 5.5V, VSOURCE = 0V to 40V; typical values are at TA = +25°C, VDD = 3.3V, VSOURCE = 24V,
VSENSE = (SENSE+ – SENSE-) = 0V; Current Sense Full Scale Range = 80 mV unless otherwise noted
Characteristic
Symbol
Min. Typ. Max. Unit
Conditions
SENSE+, SENSE- Pin
Leakage Current
SENSE+, SENSE- Pin
Leakage Current
SENSE+ Pin Bias
Current
SENSE- Pin Bias
Current
ISENSE +, ISENSE-
ISENSE +, ISENSE-
ISENSE +
ISENSE-
—
—
—
—
— 1.0 µA VBUS = 24V, VSENSE = 0V
Sleep state
— 1.0 µA VDD = 0V
100 150 µA -80 mV < VSENSE < 80 mV
Active state
0.1 1 µA -80 mV < VSENSE < 80 mV
Active state
Current-Sense Offset Error Voltage
Offset Error Voltage
(referred to input)
VOS
— ±15 — µV FSR = ±10 mV
— ±15 — µV FSR = ±20 mV
— ±20 — µV FSR = ±40 mV
— ±40 — µV FSR = ±80 mV
Current-Sense Total Measurement Error
Total Error
(positive range)
(see Section 4.4
VSENSE _TOT_ERR
“Current
Measurement”)
—
—
—
—
Total Error
(negative range)
(see Section 4.4
“Current
Measurement”)
VSENSE _TOT_ERR
-1
-1
-1
-1.6
±0.5 ±1 % FSR = 0 to +10 mV
FSR
±0.3 ±0.6 % FSR = 0 to +20 mV
FSR
±0.2 ±0.4 % FSR = 0 to +40 mV
FSR
±0.2 ±0.4 % FSR = 0 to +80 mV
FSR
-1.3 -1.6 % FSR = -10 mV to 0
FSR
-1.3 -1.6 % FSR = -20 mV to 0
FSR
-1.3 -1.6 % FSR = -40 mV to 0
FSR
-2 -2.4 % FSR = -80 mV to 0
FSR
VSOURCE Voltage Measurement
Power Supply
PSRR
Rejection Ratio
VSOURCE Error (±)
VSOURCE_ ERR
—
—
10
0.15
— mV/V 3.0V < VDD < 5.5V
0.3 %
FSV
2015-2016 Microchip Technology Inc.
DS20005386B-page 5
5 Page 
PAC1710/20
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PAC1710/20
3x3 VDFN
1
2
3
4
5
6
7
8
9
10
11
PIN DESCRIPTIONS
Symbol
SENSE1+
SENSE1-
SENSE2+
SENSE2-
GND
ADDR_SEL
ALERT
SMDATA
SMCLK
VDD
EP
Type
(See Table 3-2)
Description
AIO40
VBUS1/VSENSE1+ input
AIO40
VSENSE1- input
AIO40
VBUS2/VSENSE2+ input
AIO40
VSENSE2- input
Power
AIO
Ground
Selects SMBus/I2C™ address
DO
DIOD
SMBus Alert Pin
SMDATA: SMBus - requires pull-up resistor
DI SMCLK: SMBus - requires pull-up resistor
Power
Positive power supply voltage
— Not internally connected, but recommend grounding.
TABLE 3-2: PIN TYPES DESCRIPTION
Pin Type
Description
Power This pin is used to power the device
AIO40
Analog Input/Output – this pin is used as
an I/O for analog signals.
Maximum voltage is 40V.
AIO5
Analog Input/Output – this pin is used as
an I/O for analog signals.
Maximum voltage is 5V.
DI Digital Input – this pin is used for digital
inputs
DIOD Digital Input/Output Open Drain – this pin
is used for digital I/O and is open drain
3.1 Sense1+/Sense1-
These two pins form the differential input for measuring
voltage across a sense resistor in the application. The
positive input (Sense1+) also acts as the input pin for
bus voltage.
3.2 Sense2+/Sense2- (PAC1720 only)
These two pins form the differential input for measuring
voltage across a sense resistor in the application. The
positive input (Sense2 +) also acts as the input pin for
bus voltage.
3.5 SMBus ALERT (ALERT)
This pin is the SMBus ALERT pin that is asserted under
fault conditions.
3.6 SMBus Data (SMDATA)
This is the bidirectional SMBus data pin. This pin is
open drain, and requires a pull-up resistor.
3.7 SMBus Clock (SMCLK)
This is the SMBus clock pin. This pin is open drain, and
requires a pull-up resistor.
3.8 Positive Power Supply Voltage
(VDD)
Power supply input pin for the device.
3.9 Exposed Thermal Pad (EP)
This pad should be connected to ground for noise
immunity.
3.3 Ground (GND)
System ground.
3.4 Address Selection (ADDR_SEL)
Address selection for the SMBus Slave address, based
on the pull-down resistor.
2015-2016 Microchip Technology Inc.
DS20005386B-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet PAC1720.PDF ] | |
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