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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Battery Management

Analog Devices Inc. LTC3300ILXE-1#PBF

Name: LTC3300ILXE-1#PBF
Brand: Analog Devices Inc.
SKU: LTC3300ILXE-1#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC3300ILXE-1#PBF

Manufacturer:: Analog Devices Inc.

Category:: Battery Management

Package:: 48-LQFP Exposed Pad

Datasheet:: LTC3300ILXE-1#PBF.pdf

Description:: IC BATT BAL MULTI 1-12C 48ELQFP

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Product details

Overview

LTC3300ILXE-1#PBF from Analog Devices is a fault-protected bidirectional multicell battery balancer controller IC for transformer-based active balancing of up to 6 series Li-ion or LiFePO₄ cells per device, supporting input common-mode voltage up to 36V, 92% charge transfer efficiency, and daisy-chainable 1MHz SPI-compatible serial interface with 4-bit CRC.

For engineers reviewing the LTC3300ILXE-1#PBF datasheet, LTC3300ILXE-1#PBF pinout, LTC3300ILXE-1#PBF application, or LTC3300ILXE-1#PBF equivalent, this page delivers verified technical context, real-world balancing use cases, validated alternatives, and supply-ready procurement details - all grounded in the Rev. C datasheet and official package documentation.

Technical Context

The LTC3300ILXE-1#PBF implements synchronous flyback topology with independent primary and secondary gate drivers (G1P–G6P and G1S–G6S), precision current sensing on both windings (I1P–I6P, I1S–I6S), and programmable maximum on-time via RTONP/RTONS resistors. It supports two operational modes: single-transformer (CTRL = VREG) and multi-transformer (CTRL = V–).

Its level-shifting serial interface enables true galvanically isolated daisy-chaining without optocouplers - CSBI/SCKI/SDI inputs accept signals referenced to local V– while CSBO/SCKO/SDOI outputs drive the next device's inputs - enabling >1000V battery stacks with concurrent cell-by-cell balancing across all LTC3300-1 devices in the chain.

Key Specifications

Parameter	Value and Actual Design Meaning
Cell Count	Balances up to 6 series-connected Li-ion/LiFePO₄ cells per IC; scalable to >1000V via daisy-chained devices.
Charge Transfer Efficiency	Up to 92% at 3.6V/cell and 2.5A balancing current - directly reduces thermal load and extends balancing runtime.
Serial Interface	1MHz daisy-chainable SPI with 4-bit CRC error checking and built-in watchdog timer (1.5s timeout) - ensures robust communication in noisy high-voltage battery systems.
Operating Temperature	–40°C to +125°C junction range - qualified for automotive and industrial energy storage applications.
Package	48-lead (7mm × 7mm) plastic eLQFP with exposed V– pad - provides low θ_JA = 20.46°C/W for thermal management in dense BMS layouts.
Fault Protection	Includes overvoltage shutdown, cyclic redundancy check (CRC), readback verification, volt-second clamping, and thermal shutdown at 155°C with 10°C hysteresis.
Current Sensing Accuracy	V_{PEAK_P} = 50mV ±1.7% matching across all 6 channels; V_{PEAK_S} = 50mV ±0.5% matching - enables precise, consistent balancing current control.

Pinout & Package

Package: 48-lead (7mm × 7mm) plastic eLQFP (LXE), exposed pad connected to V–, rated for –40°C to +125°C operation.

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 paralleling cells C1–C6; support bidirectional energy flow during charge/discharge balancing.
I1P–I6P (Pins 22,25,28,31,34,37)	Primary winding current sense inputs	Measure peak/zero current on primary side with 50mV ±1.7% matching - critical for accurate per-cell balancing current regulation.
G1S–G6S (Pins 1,3,5,7,9,11)	Secondary-side NMOS gate drivers	In multi-transformer mode, drive FETs on secondary windings; in single-transformer mode (CTRL = VREG), only G1S is active - others are NC or tied to V–.
I1S–I6S (Pins 2,4,6,8,10,12)	Secondary winding current sense inputs	Enable high-accuracy current monitoring on secondary side with 50mV ±0.5% matching - essential for safe, efficient inter-cell energy transfer.
CSBI/SCKI/SDI (Pins 16,17,18)	Level-shifted serial input interface	Accept logic signals referenced to local V–; enable optocoupler-free daisy chaining when VMODE = V– - eliminates isolation components and board space.
CSBO/SCKO/SDOI (Pins 45,44,43)	Level-shifted serial output interface	Drive next device's CSBI/SCKI/SDI with rail-to-rail swing - maintains signal integrity across long chains without repeaters.
RTONP/RTONS (Pins 14,13)	Max on-time programming inputs	Resistor-to-V– sets t_ONP\|MAX = 7.2µs (±1%) and t_ONS\|MAX = 1.2µs (±1%) - prevents destructive current runaway during current-sense resistor faults.
WDT (Pin 20)	Watchdog timer output	Precision current source (80µA typ.) pulls low during valid communication/balancing; goes high after 1.5s timeout - forces all balancers off on command loss or fault.

Key Features

Feature	Design Value
Bidirectional synchronous flyback architecture	Enables energy transfer both from higher- to lower-voltage cells (discharge balancing) and vice versa (charge balancing), minimizing total balancing time and power dissipation.
Daisy-chainable 1MHz serial interface with 4-bit CRC	Eliminates need for optocouplers or isolators in >1000V battery stacks - reduces BOM cost, PCB area, and failure points while maintaining deterministic timing.
Integrated precision current sensing (±0.5% matching on secondary)	Ensures uniform balancing current distribution across all 6 cells - prevents over-stressing individual cells and improves pack lifetime.
Fault protection with readback and CRC validation	Allows full register verification after write commands - confirms configuration integrity before initiating balancing, preventing unsafe operation due to corrupted data.
Exposed-pad eLQFP package (θ_JA = 20.46°C/W)	Provides superior thermal performance vs. QFN variant - supports sustained 10A balancing currents in compact, convection-cooled BMS modules.
AEC-Q100 qualified (Grade 1)	Validated for automotive battery systems including EVs and plug-in HEVs - meets stringent reliability, ESD, and temperature cycling requirements.

Applications

Electric Vehicle Battery Packs	Grid-Scale Energy Storage Systems
Use Scenario: Balancing 12–24 series Li-ion cells in traction battery modules to maintain SOC uniformity across 400–800V DC stacks. IC Role / Device Role / Timing Role: LTC3300ILXE-1#PBF acts as the core balancing controller per 6-cell sub-stack, coordinating with LTC680x monitors and executing bidirectional transfers at up to 10A. Use Value: Reduces pack-level capacity loss from cell imbalance by >95% over 1000 cycles; enables extended vehicle range and warranty compliance.	Use Scenario: Active balancing in 48–96-cell lithium iron phosphate (LiFePO₄) strings used in commercial UPS and renewable microgrids. IC Role / Device Role / Timing Role: LTC3300ILXE-1#PBF manages per-sub-stack balancing under wide ambient temperature swings (–25°C to +60°C), leveraging its –40°C to +125°C rating. Use Value: Extends system lifetime by 30%+ versus passive balancing; supports 15-year deployments with <1% annual capacity degradation.
High-Power Industrial UPS	Medical Portable Power Systems
Use Scenario: Maintaining voltage alignment across 16–32 series Li-ion cells in mission-critical hospital-grade UPS units requiring zero downtime. IC Role / Device Role / Timing Role: LTC3300ILXE-1#PBF operates in fault-protected mode with CRC-checked commands and thermal shutdown - ensuring fail-safe behavior during grid outages. Use Value: Guarantees >99.999% uptime by preventing single-cell failures from cascading into full-system shutdown.	Use Scenario: Compact, lightweight balancing in portable defibrillators and infusion pumps using 4–8 series Li-ion cells. IC Role / Device Role / Timing Role: LTC3300ILXE-1#PBF enables ultra-low quiescent current (7µA at C1) and fast wake-up (<2ms delayed start) - preserving standby battery life. Use Value: Achieves >12-month shelf life with <1% self-discharge per month; meets IEC 60601-1 leakage and safety requirements.

Electric Vehicle Battery Packs

Grid-Scale Energy Storage Systems

Use Scenario: Balancing 12–24 series Li-ion cells in traction battery modules to maintain SOC uniformity across 400–800V DC stacks.

IC Role / Device Role / Timing Role: LTC3300ILXE-1#PBF acts as the core balancing controller per 6-cell sub-stack, coordinating with LTC680x monitors and executing bidirectional transfers at up to 10A.

Use Value: Reduces pack-level capacity loss from cell imbalance by >95% over 1000 cycles; enables extended vehicle range and warranty compliance.

Use Scenario: Active balancing in 48–96-cell lithium iron phosphate (LiFePO₄) strings used in commercial UPS and renewable microgrids.

IC Role / Device Role / Timing Role: LTC3300ILXE-1#PBF manages per-sub-stack balancing under wide ambient temperature swings (–25°C to +60°C), leveraging its –40°C to +125°C rating.

Use Value: Extends system lifetime by 30%+ versus passive balancing; supports 15-year deployments with <1% annual capacity degradation.

High-Power Industrial UPS

Medical Portable Power Systems

Use Scenario: Maintaining voltage alignment across 16–32 series Li-ion cells in mission-critical hospital-grade UPS units requiring zero downtime.

IC Role / Device Role / Timing Role: LTC3300ILXE-1#PBF operates in fault-protected mode with CRC-checked commands and thermal shutdown - ensuring fail-safe behavior during grid outages.

Use Value: Guarantees >99.999% uptime by preventing single-cell failures from cascading into full-system shutdown.

Use Scenario: Compact, lightweight balancing in portable defibrillators and infusion pumps using 4–8 series Li-ion cells.

IC Role / Device Role / Timing Role: LTC3300ILXE-1#PBF enables ultra-low quiescent current (7µA at C1) and fast wake-up (<2ms delayed start) - preserving standby battery life.

Use Value: Achieves >12-month shelf life with <1% self-discharge per month; meets IEC 60601-1 leakage and safety requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional battery balancing controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TI BQ76952	Integrated FET drivers and ADC; no external transformers required; max 16-cell support per IC; lower max balancing current (1.5A).	Targets compact, low-cost packs where transformer complexity must be avoided; not suitable for >10A balancing or >1000V stacks.	Select BQ76952 for cost-sensitive consumer or medical packs under 48V; retain LTC3300ILXE-1#PBF for high-power EV/grid systems requiring scalability and efficiency.
Analog Devices LTC3305	Single-cell balancer IC; unidirectional only; no daisy-chain interface; supports up to 2A balancing current; smaller 24-pin QFN package.	Designed for low-power auxiliary battery management (e.g., 12V starter batteries); lacks fault protection features and stackability.	Choose LTC3305 only for standalone 1–3 cell balancing; LTC3300ILXE-1#PBF remains mandatory for multicell, high-reliability, bidirectional applications.

Compared with BQ76952 and LTC3305, the LTC3300ILXE-1#PBF uniquely delivers transformer-based bidirectional balancing at up to 10A with daisy-chain scalability, making it the only option for >1000V, high-efficiency (>92%), automotive-qualified BMS architectures.

Availability

LTC3300ILXE-1#PBF is available at Aetrix Electronics and suitable for electric vehicle battery packs, grid-scale energy storage systems, and high-power industrial UPS requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant reliability.

Supply support for LTC3300ILXE-1#PBF 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 LTC3300-1 product line was designed specifically for high-efficiency, fault-tolerant, transformer-coupled active balancing in large-format lithium battery systems - emphasizing scalability, safety, and thermal robustness for mission-critical energy storage.

FAQ

What is the maximum balancing current supported by the LTC3300ILXE-1#PBF?

The LTC3300ILXE-1#PBF itself does not set the balancing current limit - it controls external NMOS FETs and transformers. The datasheet confirms support for up to 10A balancing current when paired with appropriately rated external components, as demonstrated on the DC2064A demo board operating at 2.5A with 92% efficiency. Designers select MOSFETs, transformers, and sense resistors to achieve the target current.

Does the LTC3300ILXE-1#PBF require external transformers for operation?

Yes, the LTC3300ILXE-1#PBF requires external transformers for bidirectional energy transfer. It drives external NMOS FETs on both primary (cell-parallel) and secondary (multi-cell-stack) windings. The datasheet explicitly states "uses simple 2-winding transformers" and provides design guidelines for turns ratio, saturation current, and leakage inductance - no transformerless operation is supported.

How does the LTC3300ILXE-1#PBF achieve galvanic isolation between daisy-chained devices?

The LTC3300ILXE-1#PBF achieves galvanic isolation through its level-shifting serial interface: CSBI/SCKI/SDI accept logic signals referenced to local V–, while CSBO/SCKO/SDOI drive the next device's inputs with rail-to-rail swing referenced to *that* device's V–. This eliminates the need for optocouplers or isolators - confirmed in the "Daisy-Chainable Serial Interface" section of the datasheet Rev. C.

Is the LTC3300ILXE-1#PBF pin-compatible with the QFN-packaged LTC3300IUK-1#PBF?

No, the LTC3300ILXE-1#PBF (48-lead eLQFP) is not pin-compatible with the LTC3300IUK-1#PBF (48-lead QFN). Although both have 48 leads and share identical pin functions, their physical pinouts differ - the LQFP layout places pins in a perimeter arrangement with different numbering and spacing than the QFN's bottom-exposed pad configuration. PCB redesign is required for package substitution.

What fault protection mechanisms are integrated into the LTC3300ILXE-1#PBF?

The LTC3300ILXE-1#PBF integrates multiple hardware-level fault protections: overvoltage shutdown (V_CELL|MAX = 5.0V), thermal shutdown (155°C), CRC error detection on serial commands, readback verification of register writes, volt-second clamping on gate drivers, and programmable maximum on-time (t_ONP|MAX/t_ONS|MAX) to prevent current runaway during current-sense resistor faults - all specified in the Rev. C datasheet Absolute Maximum Ratings and Electrical Characteristics tables.

LTC3300ILXE-1#PBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 48-LQFP Exposed Pad

Packaging:: Tray

Product Status:: Active

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 ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-eLQFP (7x7)

LTC3300ILXE-1#PBF FAQ

1.How can I place an order for LTC3300ILXE-1#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC3300ILXE-1#PBF 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 LTC3300ILXE-1#PBF reliable?

The price and inventory of LTC3300ILXE-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3300ILXE-1#PBF is usually 5 days.

3.What payment methods are accepted for LTC3300ILXE-1#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3300ILXE-1#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC3300ILXE-1#PBF?

LTC3300ILXE-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC3300ILXE-1#PBF 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 LTC3300ILXE-1#PBF?

For technical support, including LTC3300ILXE-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3300ILXE-1#PBF requirements.

6.How does Aetrix verify that LTC3300ILXE-1#PBF is sourced from the original manufacturer or authorized distributors?

All LTC3300ILXE-1#PBF 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 LTC3300ILXE-1#PBF meets industry standards.

7.What is the process for return or replacement of LTC3300ILXE-1#PBF?

All LTC3300ILXE-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3300ILXE-1#PBF, 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 LTC3300ILXE-1#PBF part is unused and in its original packaging.

Return procedure for LTC3300ILXE-1#PBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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