MC33771B: 14-Channel Li-ion Battery Cell Controller IC
Overview
Features
Features
Supply Voltage
- 9.6 V ≤ VPWR ≤ 61.6 V operation, 75 V transient
Advanced Voltage and Temperature Measurement
- 14 Cell Voltage Measurement Channels
- Total Stack Voltage Measurement
- 0.8 mV maximum total voltage measurement error
- 7 ADC/GPIO/Temperature Sensor Inputs
Synchronized Advanced Current Measurement
- Integrated Current sensor with PGA
- ±0.5% accuracy from milliamps to kiloamps
- Integrated Coulomb Counter
Onboard Passive Balancing
- Onboard 300mA Low Rdson passive cell balancing MOSFETs with diagnostics
- Balancing in Sleep mode
- Programmable balancing timer for each MOSFET
Isolated Daisy Chain or SPI communication
- 2.0 Mbps, 2 wire twisted pair differential, isolated
- Addressable on initialization
- 4Mbps SPI
Diagnostics, Functional Safety and Robustness
- OV/UV, OT/UT, OC fault verification
- Sleep mode OV/UV, OT/UT monitoring
- Support ISO 26262, up to ASIL D safety capability
- Hot plug capable and AEC Q-100
Product Longevity Program
- This product is included in the NXP Product Longevity program ensuring a stable supply of products for your embedded designs. MC33771B is included in the 15-year program.
Full Datasheet and more documentation are available on docstore.nxp.com (NDA required).
Key Parametrics
-
- Cell Voltage Measurement Channel
- 7to14, 7to8
-
- Cell OV/UV
- yes
-
- Cell Balancing
- no, yes
-
- Coulomb Count
- no, yes
-
- Number of Battery Cells
- 14, 8
Development Boards and Designs
RD33771-48VEVM Reference Design
RD33771CNTREVM: Flexible Battery Management System (BMS) Reference Design
BATT-14EMULATOR:14-cell Battery Pack to supply MC33771 EVBs
FRDM33664BEVB:Evaluation Board for MC33664ATL Isolated Network High-Speed TransceiverDevelopment Boards and Designs
RD33771-48VEVM Reference DesignRD33771CNTREVM: Flexible Battery Management System (BMS) Reference DesignBATT-14EMULATOR:14-cell Battery Pack to supply MC33771 EVBsFRDM33664BEVB:Evaluation Board for MC33664ATL Isolated Network High-Speed Transceiver
FRDMDUAL33664EVB:Evaluation Board for MC33664ATL Isolated Network High-Speed Transceiver
BATT-14EXTENDER:Battery Emulator Extender
FRDM33771BSPIEVB:Evaluation board for MC33771 with SPI Communication
FRDM33771BTPLEVB:Evaluation board for MC33771 with Isolated Daisy Chain Communication
BATT-14AAAPACK:Configurable Battery Pack to supply the MC33771/MC33772 EVB’s.
Target Applications
Automotive
Industrial
- E-bikes, E-scooters
- Energy Storage Systems (ESS)
- Uninterrupted Power Supply (UPS)
Comparison Table
| Parameter | MC33772B | MC33771B | MC33771C |
| Voltage Channels | 3..6 | 7..14 | 7..14 |
| Supply VRange (Max) | 6 V..30 V (40 V) | 9.6 V..61.6 V (75 V) | 9.6 V..61.6V (75 V) |
| Cell Input Voltage Range | -0.3 V to 5 V | -0.3 V to 5 V | -0.3 V to 5 V |
| Measurement Error | ± 0.8 mV (Vcell =3.3 v Ta = 25°c) | ± 0.8 mV (Vcell =3.3 v Ta = 25°c) | ± 0.8 mV (Vcell =3.3 v Ta = 25°c) |
| Total Measurement Error (After aging: MLS3 & 1000h HTOL) |
± 3.9 mV | ± 3.9 mV | ± 3.9 mV |
| Vpwr=6V..30V, Vcell=1.5V..4.3V, -40~85°C |
Vpwr=9.6V..61.6V, Vcell=1.5V..4.3V, -40~85°C |
Vpwr=9.6V..61.6V, Vcell=1.5V..4.3V, -40°C..85°C |
|
| Measurement averaging | No | No | Configurable Averaging Samples 2n n=0..8, (1,2,4,..256) |
| Functional Safety |
ASIL C ASIL D Compliance |
ASIL C ASIL D Compliance |
ASIL C ASIL D Compliance |
| Isolated communication Speed | 2 Mbps | 2 Mbps | 2 Mbps |
| Communication Isolation | Inductive | Inductive | Inductive, Capacitive |
| Max Nodes per Daisy Chain | 15 | 15 | 63 |
| CRC Bit | 8 | 8 | 8 |
| Comms bit | 40 | 40 | 48 |
| Integrated Balancing | <300 mA, Timer | <300 mA, Timer | <300 mA, Timer |
| Balancing sleep mode | Yes | Yes | Yes |
| GPIO / Analog measurement inputs | 7 | 7 | 7 |
| I2C Master | EEPROM Only | EEPROM Only | EEPROM Only |
| Current Channels | 1 | 1 | 1 |
| Coulomb counter | 1 | 1 | 1 |
| Package | 48-pin LQFP-EP (-40~105°C) | 64-pin LQFP-EP (-40~105°C) | 64-pin LQFP-EP (-40~105°C) |
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