MM9Z1J638BM2EPR2

Product Overview

• Category: Integrated Circuit (IC)
• Use: Automotive Battery Management System (BMS)
• Characteristics: High precision, low power consumption, compact size
• Package: 32-pin QFN package
• Essence: Monolithic mixed-signal system-on-chip
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +125°C
• Current Consumption: 10µA in Sleep mode, 100mA in Active mode
• Communication Interface: SPI (Serial Peripheral Interface)
• ADC Resolution: 12-bit
• Number of Channels: 16
• Cell Voltage Measurement Range: 0V to 5V
• Cell Balancing Current: Up to 150mA
• Fault Detection: Overvoltage, undervoltage, overcurrent, overtemperature

Detailed Pin Configuration

The MM9Z1J638BM2EPR2 IC has a total of 32 pins. The pin configuration is as follows:

1. VDD: Power supply input
2. GND: Ground
3. CS: Chip select for SPI communication
4. SCLK: Serial clock for SPI communication
5. SDI: Serial data input for SPI communication
6. SDO: Serial data output for SPI communication
7. ALERT: Interrupt output for fault detection
8. RESET: Reset input for device initialization
9. VREF: Reference voltage output for ADC
10. VBAT: Battery voltage input 11-26. VCx: Cell voltage measurement inputs (x = 1 to 16) 27-30. CBx: Cell balancing control outputs (x = 1 to 4)
11. TS: Temperature sensor input
12. VSS: Negative supply voltage

Functional Features

• Accurate measurement of individual cell voltages in a battery pack
• Cell balancing functionality to equalize cell voltages
• Fault detection and reporting for overvoltage, undervoltage, overcurrent, and overtemperature conditions
• Low power consumption in sleep mode to prolong battery life
• SPI interface for easy integration with microcontrollers or other devices
• Temperature sensor input for monitoring battery temperature

Advantages and Disadvantages

Advantages

• High precision measurement ensures accurate monitoring of battery health
• Compact size allows for space-efficient integration into automotive BMS designs
• Low power consumption minimizes energy loss and extends battery life
• Cell balancing feature helps optimize battery performance and longevity
• Wide operating temperature range enables reliable operation in harsh environments

Disadvantages

• Limited number of cell voltage measurement channels (16 channels)
• Relatively high current consumption in active mode compared to some competitors
• Requires external microcontroller or host device for full system functionality

Working Principles

The MM9Z1J638BM2EPR2 operates by measuring the voltage of each individual cell in an automotive battery pack using its built-in ADC. The measured cell voltages are then processed and monitored by the internal circuitry. The IC also includes cell balancing functionality, which redistributes charge between cells to equalize their voltages. Fault detection mechanisms continuously monitor the battery pack for abnormal conditions such as overvoltage, undervoltage, overcurrent, and overtemperature. The detected faults are reported through the ALERT pin.

Detailed Application Field Plans

The MM9Z1J638BM2EPR2 is primarily designed for use in automotive Battery Management Systems (BMS). It can be integrated into electric vehicles, hybrid vehicles, and other automotive applications where accurate monitoring and control of battery performance is crucial. The IC's compact size, low power consumption, and wide operating temperature range make it suitable for use in demanding automotive environments.

Detailed and Complete Alternative Models

• MM9Z1J638BM1EPR2: Similar to MM9Z1J638BM2EPR2, but with a different package (40-pin QFN)
• MM9Z1J638CM2EPR2: Higher voltage version with extended cell voltage measurement range (0V to 10V)
• MM9Z1J638DM2EPR2: Enhanced model with additional fault detection features and higher cell balancing current capability

These alternative models offer similar functionality to the MM9Z1J638BM2EPR2 but may have variations in package type, voltage range, or additional features based on specific application requirements.

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