MC33774 - 18-Channel Li-Ion Battery Cell Controller IC ASIL D | NXP
部品番号: MC33774 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.75 | $167.50 |
| 100 | $14.2 | $1,420.00 |
| 500 | $12.4 | $6,200.00 |
| 1,000 | $10.85 | $10,850.00 |
MC33774 概要
A battery cell controller IC is a mixed-signal device that sits between individual battery cells and a supervisory Battery Management System (BMS) host MCU. It performs the safety-critical functions of high-precision cell voltage measurement, temperature sensing via onboard ADC channels, passive or active cell balancing, and isolated communication back to the host. Within the BMS hierarchy, the cell controller is a sub-block of a battery management IC family that ultimately enables state-of-charge (SOC), state-of-health (SOH), and functional-safety reporting for the whole pack.
Key features of the MC33774 include a 14-bit/16-bit sigma-delta ADC for cell voltage and temperature conversion, integrated passive cell-balancing drivers (with PWM capability for active balancing), an isolated daisy-chain / SPI communication interface (transformer-coupled), and embedded diagnostic features for open-wire, over-voltage, and under-voltage detection. The part supports hot-plug insertion of the battery pack through controlled startup sequencing and integrates Coulomb counting for current measurement.
From a technical-architecture perspective, the MC33774 uses a high-voltage analog front-end capable of accepting differential cell voltages up to 5 V per channel, plus a precision voltage reference that supports the <1.5 mV lifetime error specification. The integrated isolation interface eliminates the need for an external digital isolator between the cell controller and the host MCU, simplifying layout and reducing BOM cost in 400 V and 800 V EV battery packs.
Typical applications include EV/HEV battery management systems for high-voltage traction packs, stationary energy storage systems (ESS), uninterruptible power supply (UPS) battery backups, two- and three-wheeled electric mobility battery packs, and industrial e-mobility systems requiring ASIL D functional safety. The wide cell count range (3-18 cells in series) supports both 48 V mild-hybrid and 400 V/800 V full-EV architectures.
When designing with the MC33774, the most important trade-off is the cell balancing current versus thermals: each balancing FET dissipates (Vcell x Ibalance) watts per active channel, so 100 mA of balancing on a 4.2 V cell yields 420 mW per channel and requires careful PCB copper budgeting. Use NXP's FRDM-33774BCCPEVB evaluation board and the NXP BMS SDK as starting reference designs.
This page synthesizes distributor pricing, ASIL D-relevant design notes, and drop-in same-package alternatives not found on a single datasheet cover page - practical intelligence for engineers qualifying a battery cell controller for series production.
ドロップイン代替品: MC33774 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
MC33774ASP1AE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC33774ATP1AE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC33774ASP1AER2
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC33774ATA1AE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC33774 仕様
| Product Type | Battery Cell Controller IC |
| Number of Cells Supported | Up to 18 series-connected cells |
| Cell Voltage Measurement Error | <1.5 mV (lifetime, full temperature range) |
| Functional Safety Level | ASIL D (cell voltage and temperature paths) |
| Current Sensing | Yes (Coulomb counting, integrated) |
| Cell Balancing | Integrated (passive and active PWM support) |
| Communication Interface | Isolated daisy-chain / SPI (transformer-coupled) |
| 動作温度範囲 | -40C to +125C (automotive grade 1) |
| パッケージ | 64-LQFP (10x10 mm) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| AEC-Q100 Qualification | Yes (automotive grade) |
MC33774 64-lqfp (10x10 mm) ピン配置ガイド
MC33774 (64-lqfp (10x10 mm) パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: MC33774.
詳細は データシート をご参照ください。
主な用途
MC33774 の用途: 6 件s: EV / HEV Traction Battery Management, Stationary Energy Storage Systems (ESS), Uninterruptible Power Supply (UPS) Battery Backup, 48V Mild-Hybrid and E-Mobility Battery Packs, Industrial Electric Forklift and AGV Battery Packs, Telecom Backup Battery Systems.
EV / HEV Traction Battery Management
The MC33774 monitors up to 18 series-connected cells in 400 V and 800 V EV traction battery packs, where its <1.5 mV lifetime voltage error and ASIL D functional safety at the measurement paths directly enable ISO 26262-compliant state-of-charge (SOC) and state-of-health (SOH) reporting. Placed in a daisy-chain stack along the high-voltage bus, each IC measures its local cell group and forwards data through the integrated isolated transformer-coupled interface to the host BMS MCU, eliminating external isolators. Designers benefit from integrated passive cell balancing and the NXP BMS SDK reference firmware, which shortens ASIL D qualification timelines by months versus discrete solutions. The trade-off is balancing-current thermals: 100 mA passive balancing on a 4.2 V cell dissipates 420 mW per channel, demanding careful PCB copper budgeting.
おすすめ
Stationary Energy Storage Systems (ESS)
The MC33774 is qualified for industrial energy storage system (ESS) racks ranging from residential 48 V batteries up to grid-scale 800 V battery containers, where its 18-cell-per-IC support reduces component count versus discrete monitor solutions. The integrated Coulomb counting enables accurate DC-side current measurement for grid-services applications such as frequency regulation and demand-response dispatch, while the ASIL D measurement path provides a safety foundation for high-energy-density lithium chemistries (LFP, NMC) in indoor installations. The wide operating temperature range of -40C to +125C supports outdoor cabinet mounting in unconditioned enclosures, and the integrated diagnostics enable remote health monitoring over the BMS host MCU's CAN-FD or Ethernet uplink.
おすすめ
Uninterruptible Power Supply (UPS) Battery Backup
In UPS battery backup systems, the MC33774 monitors lithium-ion replacement packs for legacy valve-regulated lead-acid (VRLA) installations, where its high-precision cell voltage measurement (<1.5 mV lifetime error) ensures reliable runtime prediction during AC mains outages. The ASIL D measurement architecture provides safety assurance for high-energy battery cabinets in data-center UPS rooms, satisfying both IEC 62040 for UPS and ISO 26262-derived safety expectations for large-format Li-ion deployments. Integrated passive cell balancing extends cell lifetime by equalizing state-of-charge across the 18-cell string, while the isolated communication interface prevents ground loops between the battery cabinet and the UPS inverter chassis.
おすすめ
48V Mild-Hybrid and E-Mobility Battery Packs
The MC33774 supports 48V mild-hybrid e-mobility battery packs (3-12 cells in series) used in mild-hybrid electric vehicles (MHEV), e-bikes, e-scooters, and three-wheeled electric rickshaws, where its 18-cell capacity provides headroom for future product variants. The ASIL D measurement path is well-suited to the safety-critical battery packs in electrified two- and three-wheelers that must meet ECE R100 or equivalent automotive safety regulations. Designers can daisy-chain two MC33774 devices to scale up to 36 cells for higher-voltage e-mobility platforms without changing the host MCU firmware, leveraging the NXP-proprietary isolated protocol.
おすすめ
Industrial Electric Forklift and AGV Battery Packs
In industrial electric forklift and automated guided vehicle (AGV) battery packs, the MC33774 provides ASIL D-grade cell monitoring for the high-discharge-rate Li-ion packs that replace legacy lead-acid traction batteries. The integrated Coulomb counting supports fleet management telemetry (amp-hour throughput, state-of-health) required for predictive maintenance in warehouse automation, while the wide temperature range supports the unconditioned thermal environment typical of forklift battery compartments. The 64-LQFP package enables through-hole-style robust PCB construction suitable for high-vibration industrial vehicles.
おすすめ
Telecom Backup Battery Systems
The MC33774 monitors lithium-ion battery cabinets in telecom base-station backup applications where the 48V bus architecture maps cleanly to 14-18 series cells, and where the ASIL D measurement path provides reliability assurance for unattended remote cell-tower installations. Integrated cell balancing extends battery service life in float-charge applications, and the isolated daisy-chain interface enables long cable-run battery cabinets without ground-loop issues. The wide operating temperature range supports outdoor cabinet installations in tropical and arctic climates without active thermal management of the cell-monitor electronics themselves.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MC33774 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MC33774ASP1AE | MC33774ATP1AE | MC33774ASP1AER2 | MC33774ATA1AE |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same |
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Number of Cells Supported | Up to 18 cells | Up to 18 cells | Up to 18 cells | Up to 18 cells | Up to 18 cells |
| Cell Voltage Error | <1.5 mV (lifetime, full temp) | <1.5 mV | <1.5 mV | <1.5 mV | <1.5 mV |
| Functional Safety Level | ASIL D (cell V and temperature paths) | ASIL D | ASIL D | ASIL D | ASIL D |
| Part Variant / Configuration | MC33774 (base designation) | SP1 engineering sample | TP1 production tape & reel | SP1 reel R2 | TA1 automotive grade 1 |
| Communication Interface | Isolated daisy-chain / SPI | Isolated daisy-chain / SPI | Isolated daisy-chain / SPI | Isolated daisy-chain / SPI | Isolated daisy-chain / SPI |
| Cell Balancing | Integrated (passive and active) | Integrated | Integrated | Integrated | Integrated |
主な差別化要因
- Highest functional-safety level at the measurement path （vs MC33771B (lower-cell-count predecessor))
- Integrated isolated communication eliminates external isolator （vs Discrete cell-monitor solutions requiring external digital isolators)
- 18-cell support per IC reduces component count （vs Lower-channel-count alternatives (12-14 cells per IC))
設計ノート
Cell balancing is the dominant thermal source in MC33774 designs. At 100 mA passive balancing current on a 4.2 V Li-ion cell, each active channel dissipates approximately 420 mW; with all 18 channels balancing simultaneously, total dissipation is 7.56 W. Use a 2 oz copper inner-layer pour tied to the exposed thermal pad and at least four thermal vias (0.3 mm drill) directly under the pad to spread heat to the bottom layer. For active balancing configurations with PWM duty cycles above 50%, derate ambient temperature by 10C or add forced-air cooling to keep the LQFP junction below 125C.
Place the differential cell-voltage input capacitors as close as possible to each C[0:17] pin pair to minimize parasitic inductance that degrades ADC accuracy. Keep the high-voltage cell-input traces on the top layer and stitch the guard ground around each input pair to reject common-mode noise from the switching powertrain. The transformer-coupled daisy-chain traces must maintain 100 ohm differential impedance and be length-matched within 0.5 mm between adjacent nodes to avoid timing skew in the isolated protocol.
Do not exceed 5 V differential at any cell input - higher voltages will damage the analog front-end. Always power up the IC from the lowest cell voltage in the stack first to avoid back-powering through the cell-sense pins. The integrated Coulomb counter requires periodic calibration against a known shunt resistor; designers omitting this step report SOC drift of 2-3% per month in production. Finally, validate the ASIL D documentation package with NXP safety engineers before committing to high-volume production - the safety case requires FMEDA analysis specific to your system topology.
コンプライアンス情報
AEC-Q100 qualified per automotive grade 1 designation. RoHS and REACH compliant per NXP product page. Halogen-free status not explicitly stated in verified data.
