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Analog Devices Inc. LTC3300HLXE-2
- Part No.:
- LTC3300HLXE-2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Battery Management
- Package:
- 48-LQFP Exposed Pad
- Datasheet:
-
LTC3300HLXE-2.pdf
- Description:
- IC BATT BAL MULTI 1-12C 48ELQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,448
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Product details
Overview
LTC3300HLXE-2 from Analog Devices is a fault-protected, bidirectional multicell battery balancer controller IC designed for transformer-based active balancing of up to 6 series-connected Li-ion or LiFePO4 cells per device, with input common-mode voltage up to 36V, 92% charge transfer efficiency, and AEC-Q100 qualification for automotive battery management systems.
For engineers reviewing the LTC3300HLXE-2 datasheet, LTC3300HLXE-2 pinout, LTC3300HLXE-2 application, or LTC3300HLXE-2 equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade thermal performance (–40°C to 150°C), and real-world balancing architecture context for high-voltage EV and energy storage stack design.
Technical Context
The LTC3300HLXE-2 implements synchronous flyback topology using external NMOS switches on both primary (cell-parallel) and secondary (stack-parallel) transformer windings, with independent RTONP/RTONS-programmable maximum on-times (7.2 µs typ / 1.2 µs typ) and precision ±45 mV peak current sense thresholds for bidirectional control. Its level-shifting SPI-compatible serial interface enables daisy-chained operation without optocouplers.
Fault protection includes cyclic redundancy check (CRC) packet validation, overvoltage shutoff (5.3 V max cell), thermal shutdown at 155°C with 10°C hysteresis, and broken-connection detection during charge/discharge-verified across full –40°C to 150°C junction range per AEC-Q100 H-grade specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count | Supports balancing of exactly 6 series-connected cells per IC, enabling scalable multi-substack architectures. |
| Max Common-Mode Voltage | 36V absolute maximum across C6-to-V–, allowing direct integration into 12S–24S battery packs. |
| Charge Transfer Efficiency | Up to 92% at 3.6V/cell and 2.5A balancing current-minimizes thermal load in high-power BMS designs. |
| Operating Temperature | –40°C to +150°C junction range (H-grade), qualified per AEC-Q100 for under-hood automotive use. |
| Serial Interface Speed | 1 MHz daisy-chainable SPI with 4-bit CRC error checking-enables fast, noise-immune communication in >1000V stacks. |
| Peak Current Sense Threshold | ±45 mV (typ) on all 12 current sense inputs (I1P–I6P, I1S–I6S), matched within ±1.7% across channels. |
| Thermal Shutdown | Triggers at 155°C with 10°C hysteresis, protecting gate drivers and external MOSFETs during overload. |
Pinout & Package
48-lead (7mm × 7mm) plastic eLQFP package with exposed pad (Pin 49) connected to V–; requires soldering to PCB for thermal and electrical integrity. θJA = 20.46°C/W, θJC = 3.68°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G1P–G6P (Pins 23,26,29,32,35,38) | Primary-side NMOS gate drivers | Drive external FETs in series with transformer primaries connected across individual cells C1–C6. |
| I1P–I6P (Pins 22,25,28,31,34,37) | Primary winding current sense inputs | Monitor flyback current on cell-parallel windings with ±45 mV threshold and <±1.7% matching. |
| G1S–G6S (Pins 1,3,5,7,9,11) | Secondary-side NMOS gate drivers | Control FETs on transformer secondaries tied across multi-cell stacks; G2S–G6S NC in single-transformer mode. |
| I1S–I6S (Pins 2,4,6,8,10,12) | Secondary winding current sense inputs | Measure stack-level balancing current with ±45 mV threshold and <±0.5% channel matching. |
| RTONP/RTONS (Pins 14/13) | Max on-time programming resistors | Set tONP-MAX = 7.2 µs (typ) and tONS-MAX = 1.2 µs (typ); also configure secondary OVP threshold. |
| CTRL (Pin 15) | Topology configuration input | Connect to VREG for single-transformer mode; connect to V– for multi-transformer per-cell balancing. |
| CSBI/SCKI/SDI/SDO (Pins 16–19) | Voltage-mode serial interface | Standard SPI signals when VMODE = VREG; enable isolated daisy-chain via level-shifted outputs when VMODE = V–. |
| WDT (Pin 20) | Watchdog timer output | Precision current source (80 µA typ) pulls low during valid commands; goes high after 1.5 s timeout to disable balancing. |
| C1–C6 (Pins 24,27,30,33,36,39) | Cell voltage inputs | Direct connection points to positive terminals of 6-series battery cells; support up to 36V total stack voltage. |
| BOOST+/BOOST–/BOOST (Pins 40–42) | Top-cell gate drive boost circuitry | Enable boosted gate drive for highest cell (C6) using external flying capacitor or inter-substack coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional synchronous flyback balancing | Enables energy transfer from any selected cell to 12+ adjacent cells-reducing imbalance correction time by >50% vs passive methods. |
| Stackable daisy-chain architecture | Eliminates need for optocouplers or isolators in >1000V battery stacks; supports concurrent independent balancing of all cells. |
| AEC-Q100 H-grade qualification | Validated for automotive under-hood environments with guaranteed operation from –40°C to +150°C junction temperature. |
| Fault-protected operation | Integrated CRC, readback, volt-second clamping, overvoltage shutoff (5.3 V), and broken-connection detection ensure fail-safe BMS behavior. |
| Configurable balancing topology | Single-transformer (low component count) or per-cell transformer modes selectable via CTRL pin-optimizing cost vs precision trade-offs. |
Applications
| Electric Vehicle Battery Packs | Grid-Scale Energy Storage Systems |
|---|---|
|
Use Scenario: Balancing 12–24 series Li-ion cells in traction battery modules operating at 400–800V DC. IC Role / Device Role / Timing Role: Controller for transformer-coupled bidirectional energy transfer between mismatched cells, synchronized across daisy-chained LTC3300HLXE-2 devices. Use Value: Achieves 92% charge transfer efficiency at 2.5A, reducing thermal stress and extending pack lifetime versus resistor-based balancing. |
Use Scenario: Active balancing of large-format LFP cells in stationary 48–96S battery racks for renewable integration. IC Role / Device Role / Timing Role: Fault-tolerant balancer managing up to 6 cells per IC with CRC-protected serial commands across 100+ device chains. Use Value: Enables >1000V system scalability with no optocouplers, lowering BOM cost and improving long-term reliability in harsh industrial environments. |
| High-Power UPS Modules | Automotive 48V Mild Hybrid Systems |
|
Use Scenario: Maintaining voltage uniformity across 16–32 series lead-acid or LiFePO4 cells in mission-critical backup power units. IC Role / Device Role / Timing Role: Primary balancing controller interfacing with LTC680x monitors via SPI, executing autonomous balancing on thermal/voltage faults. Use Value: Thermal shutdown at 155°C and 10°C hysteresis prevents runaway during sustained high-load operation in enclosed UPS enclosures. |
Use Scenario: Cell-level balancing in compact 13S–16S 48V battery packs for start-stop and regenerative braking systems. IC Role / Device Role / Timing Role: AEC-Q100 qualified balancer operating at full spec from –40°C to +150°C, integrated with vehicle CAN bus via companion MCU. Use Value: Meets automotive functional safety requirements with built-in watchdog timer, CRC validation, and deterministic fault response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional battery balancer controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI BQ76952 | Integrated FETs (no external MOSFETs required); lower max cell voltage (32V); no daisy-chain isolation capability. | Best for space-constrained, lower-voltage (<32V) consumer or industrial packs where layout simplicity outweighs stack scalability. | Select LTC3300HLXE-2 when >32V operation, >1000V stack scalability, or AEC-Q100 H-grade thermal range is mandatory. |
| Analog Devices LTC3300ILXE-1 | Same pinout and functionality but rated for –40°C to +125°C (I-grade); lacks AEC-Q100 qualification and higher thermal margin. | Suitable for non-automotive industrial or telecom energy storage where extended temperature is not required. | Choose LTC3300HLXE-2 for automotive deployment or any application demanding guaranteed 150°C junction operation. |
Compared with the TI BQ76952 and LTC3300ILXE-1, the LTC3300HLXE-2 uniquely combines AEC-Q100 H-grade qualification, 36V common-mode tolerance, optocoupler-free daisy-chaining, and 92% efficiency-making it the only option for scalable, high-reliability automotive and grid-storage BMS designs.
Availability
LTC3300HLXE-2 is available at Aetrix Electronics and suitable for electric vehicle battery packs, grid-scale energy storage systems, and high-power UPS modules requiring stable component supply, automotive-grade reliability, and long-term lifecycle support.
Supply support for LTC3300HLXE-2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3300 family is designed specifically for high-efficiency, fault-protected, transformer-based active balancing in multicell battery stacks-targeting automotive, energy storage, and high-reliability industrial applications.
FAQ
What is the maximum number of battery cells the LTC3300HLXE-2 can balance per device?
The LTC3300HLXE-2 balances up to 6 series-connected battery cells per IC. It achieves this using transformer-coupled bidirectional flyback architecture, with dedicated primary-side (I1P–I6P/G1P–G6P) and secondary-side (I1S–I6S/G1S–G6S) interfaces. Multiple LTC3300HLXE-2 devices can be daisy-chained to balance longer stacks-each handling its own 6-cell sub-stack while sharing timing and fault data across the chain.
Does the LTC3300HLXE-2 require external MOSFETs, and why?
Yes, the LTC3300HLXE-2 requires external NMOS transistors on both primary and secondary sides of the balancing transformers. It provides high-current gate drivers (G1P–G6P, G1S–G6S) and precision current sensing (I1P–I6P, I1S–I6S), but does not integrate power switches. This architecture allows designers to select MOSFETs optimized for voltage rating, RDS(on), and thermal performance-critical for achieving 92% efficiency and supporting >36V stack voltages in automotive and grid applications.
How does the LTC3300HLXE-2 achieve daisy-chain communication without optocouplers?
The LTC3300HLXE-2 uses a level-shifting serial interface: when VMODE = V–, pins CSBI/SCKI/SDI accept level-shifted signals from the preceding device's CSBO/SCKO/SDOI outputs, while SDO is disabled. This eliminates ground-loop issues and enables galvanically isolated communication across >1000V stacks using only passive components-no optocouplers, isolators, or magnetics required-reducing BOM cost and board area.
What fault protection mechanisms are built into the LTC3300HLXE-2?
The LTC3300HLXE-2 integrates multiple hardware-level protections: cyclic redundancy check (CRC) on all serial commands, overvoltage shutoff (5.3 V rising threshold), thermal shutdown at 155°C with 10°C hysteresis, maximum on-time clamping via RTONP/RTONS resistors, and broken-connection detection during charge/discharge cycles. These features operate autonomously without MCU intervention, ensuring fail-safe behavior in safety-critical battery systems.
Is the LTC3300HLXE-2 pin-compatible with other variants in the LTC3300 family?
Yes, the LTC3300HLXE-2 shares identical 48-lead eLQFP pinout and electrical interface with LTC3300ILXE-1, LTC3300HLXE-1, and LTC3300ILXE-2. Differences are limited to temperature grade (H-grade: –40°C to +150°C), AEC-Q100 qualification, and minor internal trimming-ensuring drop-in replacement capability for upgraded thermal or automotive compliance requirements without PCB redesign.
LTC3300HLXE-2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Battery Balancer
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 1 ~ 12
- Fault Protection:
- Over Temperature, Over Voltage, Short Circuit
- Interface:
- Serial
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-eLQFP (7x7)
LTC3300HLXE-2 FAQ
1.How can I place an order for LTC3300HLXE-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3300HLXE-2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC3300HLXE-2 reliable?
The price and inventory of LTC3300HLXE-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3300HLXE-2 is usually 5 days.
3.What payment methods are accepted for LTC3300HLXE-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3300HLXE-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3300HLXE-2?
LTC3300HLXE-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3300HLXE-2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC3300HLXE-2?
For technical support, including LTC3300HLXE-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3300HLXE-2 requirements.
6.How does Aetrix verify that LTC3300HLXE-2 is sourced from the original manufacturer or authorized distributors?
All LTC3300HLXE-2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC3300HLXE-2 meets industry standards.
7.What is the process for return or replacement of LTC3300HLXE-2?
All LTC3300HLXE-2 units undergo pre-shipment inspection (PSI). If there is an issue with LTC3300HLXE-2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC3300HLXE-2 part is unused and in its original packaging.
Return procedure for LTC3300HLXE-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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