R5460N235AA-TR-FE - 2-Cell Li-Ion Battery Protector | Nisshinbo
料号： R5460N235AA-TR-FE ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.18 | $118.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.78 | $780.00 |
R5460N235AA-TR-FE 概述
A lithium-ion battery protection IC is a specialized analog/mixed-signal device that continuously monitors cell voltages and disconnects the pack from the load or charger when unsafe conditions occur (over-charge, over-discharge, over-current, or short circuit). Within the broader battery management hierarchy, the R5460N235AA belongs to the secondary protection IC category, sitting one level below the battery management system (BMS) controller and working in conjunction with dual-MOSFET protection switches to provide redundant safety. The R5460x2xxxx Series employs CMOS process technology with on-chip高精度 voltage references to deliver factory-trimmed detection thresholds across the variant range.
Key features include fixed over-charge detection voltage, fixed over-discharge detection voltage, ultra-low quiescent current in normal mode to extend battery shelf life, internal fixed delay timers for noise immunity (eliminating external RC networks), and CMOS output stages for driving external N-channel MOSFET disconnect switches. The 6-pin SOT-23 package enables reflow-compatible surface-mount assembly compatible with high-volume automated pick-and-place lines. Per the manufacturer datasheet, the device does not require an external sense resistor for basic voltage protection, simplifying BOM cost.
Typical applications include 2-cell Li-Ion and Li-Polymer battery packs for power tools, portable medical devices, e-bike auxiliary systems, IoT backup battery modules, handheld instrumentation, and consumer electronics requiring 7.2 V to 8.4 V nominal battery rails. The wide 1.5 V to 10 V operating range also enables use in 2S lithium-iron-phosphate (LiFePO4) packs with adjusted threshold variants in the same family.
Design considerations include placing input decoupling (1 microfarad ceramic minimum) directly at the VDD pin, using low-RDS(on) dual N-channel MOSFETs for the CO and DO switches, and observing the absolute maximum ratings to prevent latch-up. The 6-pin SOT-23 requires careful thermal pad design when used near the upper operating voltage limit.
This page synthesizes distributor availability from Newark, DigiKey Marketplace, Rochester Electronics, and authorized partners, plus comparison data against R5460x2xxxx family variants and competing 2-cell Li-Ion protectors from onsemi and other manufacturers, providing engineering context not aggregated in the standalone manufacturer datasheet.
直接替换替代料： R5460N235AA-TR-FE ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
R5460N222AA-TR-FE
✅ 直接替换📋 参考替代料（不在目录中）
R5460N233AF-TR-FE
✅ 直接替换📋 参考替代料（不在目录中）
R5460N212AF-TR-FE
✅ 直接替换📋 参考替代料（不在目录中）
R5460N235AA-TR-FE 规格参数
| 功能 | 2-Cell Li-Ion / Li-Polymer Battery Protection IC |
| Number of Cells | 2 (series) |
| Battery Chemistry | Li-Ion / Li-Polymer |
| Absolute Maximum Supply Voltage | 10 V |
| Minimum Operating Voltage | 1.5 V |
| 拓扑 | High-voltage CMOS |
| Protection Functions | Over-charge, Over-discharge |
| 封装 | 6-pin SOT-23 |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (-TR suffix) |
| Terminal Finish | Lead-free (-FE suffix), RoHS compliant |
R5460N235AA-TR-FE 引脚配置
| 引脚 1 | VDD — Power supply input / pack positive voltage sense |
| 引脚 2 | VSS — Ground reference |
| 引脚 3 | DO — Discharge control output (active drive for external MOSFET) |
| 引脚 4 | CO — Charge control output (active drive for external MOSFET) |
| 引脚 5 | VC1 — Cell 1 voltage sense input (per datasheet) |
| 引脚 6 | VC2 — Cell 2 voltage sense input (per datasheet) |
典型应用
R5460N235AA-TR-FE 适用于 6 应用s: 2-Cell Li-Ion Power Tool Battery Pack, Portable Medical Device Backup Battery, E-Bike Auxiliary Battery Pack, IoT Backup Battery Module, Handheld Test and Measurement Instrument, Consumer 2S Li-Polymer Pack (Tablet Accessory, Bluetooth Speaker).
2-Cell Li-Ion Power Tool Battery Pack
The R5460N235AA's 1.5 V to 10 V operating range and integrated over-charge/over-discharge protection make it well-suited for 2-cell series Li-Ion power tool battery packs. Placed between the pack positive terminal and dual N-channel MOSFET disconnect switches, the IC continuously monitors pack voltage and drives the CO/DO outputs to interrupt current flow during unsafe conditions. Compared to a full programmable BMS, this fixed-threshold protector provides a lower BOM cost and smaller PCB footprint for cost-sensitive 18 V-class cordless tools where fuel gauging and SMBus are not required.
推荐
Portable Medical Device Backup Battery
For 2-cell Li-Polymer backup batteries in portable medical devices, the R5460N235AA delivers fixed-threshold secondary protection with low quiescent current and a 6-pin SOT-23 footprint ideal for compact medical PCBs. The wide 1.5 V to 10 V supply range covers the full operating window of 2S Li-Po packs (7.2 V to 8.4 V nominal) with headroom for transient conditions. Unlike a fuel-gauge IC, the R5460x2xxxx Series provides the bare over-voltage and under-voltage safety cutoffs mandated for medical battery safety, leaving higher-level monitoring to the host MCU.
推荐
E-Bike Auxiliary Battery Pack
Auxiliary 2S Li-Ion battery packs in e-bike lighting and control subsystems benefit from the R5460N235AA's compact 6-pin SOT-23 package and 10 V absolute maximum rating. The fixed over-charge threshold prevents cell damage during regenerative charging events, and the low quiescent current extends pack shelf life when the e-bike is in storage. Compared to integrated BMS solutions, this discrete protector enables a smaller PCB that can be co-located with the lighting driver, reducing wiring harness complexity.
推荐
IoT Backup Battery Module
2-cell Li-Ion backup modules for IoT gateways and wireless sensor nodes use the R5460N235AA to provide last-line defense against over-charge from intermittent solar or inductive charging sources. The 1.5 V minimum operating voltage ensures the IC remains active even during deep-discharge recovery attempts, while the 10 V absolute maximum tolerates modest charging transients. Placed in series with the charging input and main load, this protector prevents pack damage that would otherwise shorten the IoT device's operational lifetime in field-deployed scenarios.
推荐
Handheld Test and Measurement Instrument
Handheld DMMs, oscilloscopes, and gas analyzers powered by removable 2-cell Li-Ion battery packs use the R5460N235AA to enforce safe voltage boundaries on removable packs that may be charged by third-party chargers. The 6-pin SOT-23 package integrates protection in less than 9 mm² of PCB area, leaving room for the dense analog front-end and display drivers of a portable instrument. The fixed over-discharge threshold protects cells from destructive deep-discharge when users leave packs unused for extended periods, complementing any onboard fuel-gauge telemetry.
推荐
Consumer 2S Li-Polymer Pack (Tablet Accessory, Bluetooth Speaker)
Bluetooth speakers, tablet keyboards, and other consumer accessories using 2-cell Li-Polymer packs employ the R5460N235AA as a cost-optimized, compact protection solution. The CMOS output stages drive small-signal N-channel MOSFETs appropriate for the 1 A to 3 A current range typical of consumer accessories. Compared to a full BMS with fuel gauging, this dedicated protector keeps the BOM small and the assembly simple, while the -TR tape-and-reel packaging supports high-volume reflow lines used by consumer accessory OEMs.
推荐
推荐产品汇总
工程参考数据： R5460N235AA-TR-FE ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | R5460N222AA-TR-FE | R5460N233AF-TR-FE | R5460N212AF-TR-FE |
|---|---|---|---|---|
| Package | 6-pin SOT-23 | 6-pin SOT-23 (same) | 6-pin SOT-23 (same) | 6-pin SOT-23 (same) |
| Brand | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Nisshinbo Micro Devices | Nisshinbo Micro Devices |
| Number of Cells | 2S | 2S | 2S | 2S |
| Minimum Operating Voltage | 1.5 V | 1.5 V | 1.5 V | 1.5 V |
| Absolute Maximum Supply Voltage | 10 V | 10 V | 10 V | 10 V |
| Battery Chemistry | Li-Ion / Li-Polymer | Li-Ion / Li-Polymer | Li-Ion / Li-Polymer | Li-Ion / Li-Polymer |
| Top-side Marking / Variant Code | 235AA | 222AA | 233AF | 212AF |
关键差异点
- Wide operating voltage margin for 2S Li-Ion and LiFePO4 packs （对比 Generic 2-cell protectors with narrower operating range)
- Compact 6-pin SOT-23 footprint （对比 Larger 8-pin or 16-pin protection ICs)
- Integrated fixed-threshold detection (no external resistor divider) （对比 Adjustable protectors requiring external resistor networks)
设计说明
Place a 1 microfarad ceramic decoupling capacitor directly between VDD (pin 1) and VSS (pin 2) with traces shorter than 5 mm to suppress voltage transients at the sense input. The 6-pin SOT-23 thermal pad (exposed pad, where present) should be soldered to a copper pour connected to VSS for improved heat dissipation; without it, the part relies entirely on the package leads for thermal relief. Estimated: assuming 1 ounce copper and minimal airflow, sustained dissipation should stay below 100 mW.
Select external N-channel MOSFET disconnect switches with gate threshold voltage below the CO and DO output drive levels, and RDS(on) appropriate for the maximum continuous load current (1 A to 3 A typical for 2S Li-Ion packs of this class). Per the manufacturer datasheet, the CO output is active low to enable charging and the DO output is active low for discharge enable. Verify both MOSFETs can withstand the worst-case pack voltage (8.4 V fully charged) plus transient ringing from inductive loads.
Do not exceed 10 V on VDD - sustained over-voltage even at low current may damage internal Zener clamps. Ensure that the cell sense inputs (VC1, VC2) are never left floating; if only one cell is connected in some fault condition, internal voltage divider chains can misreport and trigger false over-charge or over-discharge events. Always observe the cell-wiring polarity: pack positive to VDD, midpoint between cells to VC1, and pack negative to VSS. Verify the variant code (235AA) matches the target cell chemistry voltage thresholds before PCB assembly.
合规信息
RoHS compliant per -FE suffix in MPN (Nisshinbo Micro Devices lead-free terminal finish). AEC-Q100 not applicable - this is a consumer/industrial battery protection IC, not an automotive qualified part. REACH compliance assumed per EU distribution availability.
