TCKE712BNL - 13.2V 3.65A eFuse IC, 53mΩ | Toshiba
料号： TCKE712BNL ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.14 | $1.14 |
| 10 | $1.05 | $10.50 |
| 100 | $0.95 | $95.00 |
| 500 | $0.87 | $435.00 |
| 1,000 | $0.8 | $800.00 |
TCKE712BNL 概述
An eFuse IC is a solid-state electronic fuse integrated into a power-management IC: it sits in series with a supply rail and disconnects the load when current, voltage, or temperature conditions exceed safe limits. Unlike a one-time熔 fuse, an eFuse can be re-enabled after a fault, and unlike a hot-swap controller alone it integrates the power MOSFET, sense element, and control logic in one package. eFuses sit in the broader hierarchy of power management ICs, alongside LDO regulators, DC-DC converters, and supervisors, and are a standard building block in server, storage, IoT, and general-purpose power supplies.
Key features include an adjustable overcurrent limit set by a single external resistor, short-circuit protection with fast response, programmable inrush (slew rate) control via an external capacitor, and adjustable overvoltage protection with undervoltage lockout. The 53 mΩ on-resistance minimizes series voltage drop and power loss - at a 3 A load the drop is only about 159 mV and dissipation about 0.48 W (estimated: I²R = 3² × 0.053).
Technically, the TCKE712BNL is a CMOS silicon-monolithic linear power IC. The integrated back power MOSFET and sense circuitry enable precise current limiting, while the slew-rate control pin allows designers to soft-start capacitive loads and suppress inrush spikes during hot-plug events. Fault behavior (latch-off versus auto-retry) is handled by the BL series variant family, letting designers match protection policy to system requirements.
Typical applications include server backplane 12 V rail protection, SSD and hard-disk storage power inputs, IoT equipment and consumer electronics DC inputs, and general-purpose 5 V/12 V power-supply outputs where a resettable fuse with inrush control is required.
Design consideration: set the overcurrent limit resistor so the trip point sits above the worst-case load transient but well below the wiring and connector ratings, and choose the slew-rate capacitor for the load capacitance to keep inrush below the OCP threshold during startup.
This page synthesizes distributor pricing, same-family drop-in alternatives, comparison tables, and practical eFuse design notes not found in the manufacturer datasheet alone.
直接替换替代料： TCKE712BNL ——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：
TCKE712BNA
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TCKE812BNL
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TCKE705BNL
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TCKE712BNL 规格参数
| Product Type | eFuse IC (electronic fuse, hot-swap protection) |
| 输入电压范围 | 4.4 V to 13.2 V |
| 最大输出电流 | 3.65 A |
| On-Resistance (Ron) | 53 mOhm |
| Overcurrent Limit | Adjustable via external resistor |
| Overvoltage Protection | Adjustable |
| Undervoltage Lockout | Yes |
| Slew Rate Control | Adjustable via external capacitor |
| Short Circuit Protection | Yes |
| Configuration | Single input - single output |
| 封装 | WSON10 (3x3 mm) |
| 安装类型 | Surface Mount |
| Applications | Consumer equipment, Server, IoT equipment, Storage, General purpose power supply |
| Process Technology | CMOS linear silicon monolithic |
TCKE712BNL wson10 (3x3 mm) 引脚配置指南
TCKE712BNL（wson10 (3x3 mm) 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： TCKE712BNL.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TCKE712BNL 适用于 6 应用s: Server 12V Rail Protection, SSD and Storage Power Inputs, IoT Device DC Input Protection, Consumer Electronics Power Supply Outputs, Hot-Swap Board Insertion Protection, Port Power Budget Enforcement.
Server 12V Rail Protection
Server backplanes and blade boards distribute 12 V power to multiple pluggable cards, where a single shorted card can brown out an entire chassis. The Toshiba TCKE712BNL fits this role because its 4.4 V to 13.2 V input range covers nominal 12 V rails, its 53 mOhm on-resistance keeps distribution losses low at multi-amp loads, and its adjustable overcurrent limit via one external resistor lets each card enforce its own power budget. During card hot-insertion, the programmable slew-rate control (external capacitor) ramps the output gently, holding inrush below the OCP threshold and avoiding upstream droop. Latch-off fault behavior keeps a faulty card isolated until a technician investigates, which is the desired policy in datacenter environments.
推荐
SSD and Storage Power Inputs
Storage devices - SSDs, HDD carrier boards, and NAS drive bays - need compact, low-loss input protection because drive power connectors are routinely hot-plugged and can be reverse-tensioned or damaged. The TCKE712BNL suits storage front-ends: Toshiba explicitly lists storage equipment as a target application, and the 3x3 mm WSON10 package fits the tight board space around SATA/SAS power connectors. The 53 mOhm on-resistance minimizes the drop between the 12 V rail and the drive DC-DC converters, and the adjustable overcurrent limit protects against a stalled motor or a shorted DC-DC input. Slew-rate control tames the capacitive inrush seen when a drive slides into a live bay, preventing connector sparking and upstream supply glitches.
推荐
IoT Device DC Input Protection
IoT equipment is often powered by field-terminated DC adapters and long cable runs, exposing inputs to miswiring, shorted cables, and surge events. The TCKE712BNL provides a resettable protection stage: its adjustable overvoltage protection clamps fault conditions, undervoltage lockout prevents brownout misoperation, and the adjustable overcurrent limit disconnects shorted loads without replacing a physical fuse. Its 3.65 A capability and low 53 mOhm resistance cover typical 12 V IoT gateways, cameras, and industrial sensor nodes, while the small WSON10 footprint suits dense, cost-sensitive boards. Because the device latches off on fault, the node can log the event and request service rather than continuously cycling into a short.
推荐
Consumer Electronics Power Supply Outputs
Consumer equipment power supplies - set-top boxes, small appliances, adapters - need an inexpensive, resettable output protection stage that survives user abuse such as connector shorts. The TCKE712BNL, listed by Toshiba for consumer equipment and general purpose power supplies, integrates the MOSFET, current-sense, and protection logic that would otherwise require discrete fuse, TVS, and controller circuitry. Its programmable slew rate gives a soft-start output that avoids audible clicks and inrush stress on electrolytic capacitors, and the adjustable OCP via a single resistor allows one PCB design to cover multiple current-rated product variants. The latch-off response also gives deterministic, testable fault behavior for safety verification.
推荐
Hot-Swap Board Insertion Protection
Any system with field-replaceable modules - line cards, fan trays, battery packs - faces large inrush currents as the module's input capacitance charges through connector contacts on insertion. The TCKE712BNL addresses this with its external-capacitor slew rate control: the output ramps at a controlled dV/dt, holding inrush below the programmed OCP threshold so contacts do not arc and the backplane supply does not droop. Its 4.4 V to 13.2 V range and 3.65 A rating cover standard 5 V and 12 V module rails, and the 53 mOhm internal MOSFET eliminates an external pass FET, shrinking the hot-swap stage to a handful of passives around a 3x3 mm device.
推荐
Port Power Budget Enforcement
Multi-port systems such as hubs, docking stations, and industrial I/O concentrators must cap the current drawn per port so one overloaded accessory cannot drag down the shared supply. Placing a TCKE712BNL on each port output implements independent, per-port current limiting: the external resistor programs each port's limit, the eFuse isolates a faulted port while the others keep running, and OVP plus UVLO guard against abnormal accessory voltages. The low 53 mOhm resistance preserves voltage accuracy at the far end of a cable, and the small WSON10 package allows one protection device per port even on dense boards - an approach impractical with discrete polyfuses due to their loose trip tolerance.
推荐
推荐产品汇总
工程参考数据： TCKE712BNL ——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 | TCKE712BNA | TCKE812BNL | TCKE705BNL |
|---|---|---|---|---|
| Package | WSON10 (3x3 mm) | WSON10 (3x3 mm) - same | WSON10 (3x3 mm) - same | WSON10 (3x3 mm) - same |
| Brand | Toshiba | Toshiba | Toshiba | Toshiba |
| Fault Response | Latch-off | Auto-retry | Latch-off | Latch-off |
| Adjustable OCP / OVP / Slew Rate | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes |
关键差异点
- Integrated 53 mOhm MOSFET saves external pass FET （对比 Discrete PPTC polyfuse + TVS solution)
- Latch-off fault policy for diagnostics （对比 TCKE712BNA (auto-retry))
- 13.2 V input ceiling for 12 V rails （对比 TCKE705BNL (5.5 V))
设计说明
Size the ILIM overcurrent resistor against the worst-case load transient, not the nominal load. A limit set too close to normal operating current will nuisance-trip on capacitor charging bursts or motor start events; a limit set too high sacrifices wiring protection. Also verify that the startup inrush shaped by the slew-rate capacitor stays below the OCP threshold - an undersized dV/dt capacitor is the most common cause of startup failures in eFuse designs.
Estimated: with 53 mOhm on-resistance, conduction loss is I2 x 0.053 W - about 0.24 W at 2.1 A and 0.71 W at the full 3.65 A rating. In the small WSON10 (3x3 mm) body, junction temperature rise is dominated by PCB copper, so pour a solid ground plane under the package and use multiple thermal vias to the internal ground layer. Re-evaluate the design if continuous current exceeds roughly 3 A in a high-ambient enclosure.
Place the input decoupling capacitor close to the VIN pin, and the output capacitor at the load side of the eFuse; keep the high-current VIN-to-VOUT loop short and wide. Route the ILIM and dV/dt sense lines away from the power path to avoid false triggering from load-transient coupling, and provide a test point or 0-ohm footprint on the EN/UVLO line so fault behavior can be exercised during system bring-up.
合规信息
Compliance declarations were not present in the provided web data. Toshiba current-generation eFuse ICs are generally RoHS-compliant, but the official RoHS/REACH certificate should be obtained from Toshiba's compliance portal before contractual reliance.
