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Overview
| Topology | Battery Management System |
| Input voltage | 32 V |
| IC revision | 1 |
Description
The PAC1951/2/3/4 family of products are comprisedof one, two, three and four-channel energy monitorswith bus voltage monitors and current sense amplifiersthat feed high-resolution ADCs. There are two versionsof PAC195X: PAC195X-1 devices for high-side currentsensing and PAC195X-2 devices for high-side orlow-side current sensing or floating VBUS applications.Digital circuitry performs power calculations andenergy accumulation. This enables energy monitoringwith integration periods up to one year or longer. Busvoltage, sense resistor voltage and accumulatedproportional power are stored in registers for retrievalby the system host or embedded controller.PAC1951/2/3/4 has a set of digital comparators thatallow the user to detect over/undervoltage,over/undercurrent and overpower against userprogrammed limits for each channel and generate anALERT when the threshold is exceeded.The sampling rate and energy integration period can becontrolled over SMBus or I2C. Active channel selection,single-shot measurements and other controls are alsoconfigurable by the SMBus or I2C. PAC1951/2/3/4 usesreal-time calibration to minimize the offset error. Noinput filters are required for this device.
Features
- High-Side/Low-Side Current Monitor with One,Two, Three or Four Channels:
- Simultaneous Sampling of VBUS and VSENSEwith Two Independent 16-bit ADC
- 100 mV Full-Scale Range (FSR) for CurrentSense Voltage
- Programmable FSR: -50 mV to +50 mV
- 16-bit Resolution for Current Measurements
- External Sense Resistor Sets the Full-ScaleCurrent Range
- Very Low Input Current Simplifies Routing
- Voltage Monitor with Wide VBUS Range:
- 0V to 32V FSR
- 16V Programmable VBUS Option
- 16-bit RESOLUTION for Voltage Measurements
- VSOURCE Can Be Applied Before VDD Is Applied
- Real-Time Auto-Calibration of Offset Error forVoltage and Current
- 1% Power Measurement Accuracy over a WideDynamic Range
- On-Chip Accumulation of 30-bit Power Results forEnergy Measurement:
- User Programmable Sampling Rates of 8, 64,256 and 1,024 sps
- 5,120 sps for a Single Channel in Burst Mode
- 2.7V to 5.5V Supply Operation:
- 1.62 to 5.5V capable I2C/SMBus and digital I/O
- SMBus 3.1 and I2C Fast Mode Plus, 1 Mbps
- High-Speed Mode (3.4 Mbps)
- SMBus Address – 16 Options, Set with Resistor
- ALERT on Conversion Complete
- ALERT on Over/Undervoltage and Current orOverpower Conditions
- Coulomb Counting: When Selected, AccumulatorGathers VSENSE Values
- 8X Averaging Mode for Single-ShotMeasurements to Reduce Noise and Offset
- Two Independent ALERT/GPIO Pins
- AEC-Q100 Qualified (VQFN)
Typical applications
- Low Voltage BMS
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | λDom typ.(nm) | Emitting Color | λPeak typ.(nm) | IV typ.(mcd) | VF typ.(V) | Chip Technology | 2θ50% typ.(°) | VIN | VOut1(V (DC)) | IOut1(A) | Type of Insulation | fswitch(kHz) | ∫Udt(Vµs) | NPRI : NSEC | L(µH) | VT(V (AC)) | L(mm) | W(mm) | H(mm) | Mount | Pins | IR(mA) | Working Voltage(V (AC)) | Operating Temperature | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(Ω) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WL-SMCW SMT Mono-color Chip LED Waterclear, 525 nm, Green | Downloads26 files RAY files
| Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | Dominant Wavelength [typ.]525 nm | Emitting ColorGreen | Peak Wavelength [typ.]515 nm | Luminous Intensity [typ.]430 mcd | Forward Voltage [typ.]3.2 V | Chip TechnologyInGaN | Viewing Angle Phi 0° [typ.]140 ° | – | – | – | – | – | – | – | – | – | Length1.6 mm | Width0.8 mm | Height0.7 mm | MountSMT | – | – | – | Operating Temperature -40 °C up to +85 °C | – | – | – | – | – | – | |||
| WL-SMCW SMT Mono-color Chip LED Waterclear, 625 nm, Red | Downloads26 files RAY files
| Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | Dominant Wavelength [typ.]625 nm | Emitting ColorRed | Peak Wavelength [typ.]630 nm | Luminous Intensity [typ.]250 mcd | Forward Voltage [typ.]2 V | Chip TechnologyAlInGaP | Viewing Angle Phi 0° [typ.]140 ° | – | – | – | – | – | – | – | – | – | Length1.6 mm | Width0.8 mm | Height0.7 mm | MountSMT | – | – | – | Operating Temperature -40 °C up to +85 °C | – | – | – | – | – | – | |||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | MountSMT | – | Rated Current300 mA | – | Operating Temperature -55 °C up to +125 °C | Impedance @ 100 MHz300 Ω | Maximum Impedance1500 Ω | Maximum Impedance250 MHz | Rated Current 2750 mA | DC Resistance0.35 Ω | TypeHigh Speed | ||||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Length3.2 mm | Width1.6 mm | Height1.1 mm | MountSMT | – | Rated Current1500 mA | – | Operating Temperature -55 °C up to +125 °C | Impedance @ 100 MHz600 Ω | Maximum Impedance650 Ω | Maximum Impedance80 MHz | Rated Current 22500 mA | DC Resistance0.07 Ω | TypeHigh Current | ||||
 | WE-PPTI Push-Pull Transformers, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PPTI Push-Pull Transformers | – | – | – | – | – | – | – | Input Voltage 5 V (DC) | Output Voltage 15 V (DC) | Output Current 10.75 A | Type of InsulationFunctional | Switching Frequency 300 - 620 | Voltage-µSecond11 Vµs | Turns Ratio1:1.1 | Inductance475 µH | Insulation Test Voltage2500 V (AC) | Length6.73 mm | Width10.2 mm | Height4.19 mm | MountSMT | – | – | – | Operating Temperature -40 °C up to +125 °C | – | – | – | – | – | – | |||
| WE-PPTI Push-Pull Transformers, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PPTI Push-Pull Transformers | – | – | – | – | – | – | – | Input Voltage 5 V (DC) | Output Voltage 15 V (DC) | Output Current 10.6 A | Type of InsulationFunctional | Switching Frequency 300 - 620 | Voltage-µSecond11 Vµs | Turns Ratio1:1.3 | Inductance475 µH | Insulation Test Voltage2500 V (AC) | Length6.73 mm | Width10.2 mm | Height4.19 mm | MountSMT | – | – | – | Operating Temperature -40 °C up to +125 °C | – | – | – | – | – | – | |||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Length5.08 mm | – | – | MountTHT | Pins2 | Rated Current3000 mA | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | TypeStraight | |||
 | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Length15.24 mm | – | – | MountTHT | Pins6 | Rated Current3000 mA | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | – | – | – | – | – | TypeAngled | |||
 | WE-PPTI Push-Pull Transformers, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PPTI Push-Pull Transformers | – | – | – | – | – | – | – | Input Voltage 4.5 - 5.5 V (DC) | Output Voltage 15 V (DC) | Output Current 11 A | Type of InsulationFunctional | Switching Frequency 400 - 700 | Voltage-µSecond8.6 Vµs | Turns Ratio1:1.1 | Inductance72 µH | Insulation Test Voltage2500 V (AC) | Length8.3 mm | Width12.6 mm | Height4.1 mm | MountSMT | – | – | – | Operating Temperature -40 °C up to +125 °C | – | – | – | – | – | – |