ADT7475ARQZ-REEL - 4-Fan PWM Thermal Controller | onsemi
料号： ADT7475ARQZ-REEL ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.3546 | $2.35 |
| 10 | $2.3546 | $23.55 |
| 100 | $2.3546 | $235.46 |
| 500 | $2.3546 | $1,177.30 |
| 1,000 | $2.3546 | $2,354.60 |
ADT7475ARQZ-REEL 概述
A remote thermal monitor and fan controller is a power-management and thermal-management IC that measures temperature and regulates cooling equipment according to configured thresholds. In the hierarchy, it belongs to system monitoring and fan-control ICs, which sit below broader thermal-management and power-management systems. The ADT7475 supports one on-chip temperature sensor and two remote temperature-sensor diode channels, enabling distributed temperature measurement in a compact controller.
Key verified features include control and monitoring for up to four fans, high- and low-frequency fan-drive signals, an SMBus output, and an extended temperature-measurement range extending to 191°C as stated in indexed descriptions of the manufacturer datasheet. These features allow designers to combine local package-temperature protection with remote-diode monitoring while using variable-speed fans to reduce acoustic noise and power consumption.
The controller measures and controls fan speed for thermal regulation, making it applicable to computer servers, storage systems, communications equipment, industrial controllers, and other multi-fan platforms. Its internal sensor and remote-diode inputs can support different thermal zones, while PWM output enables gradual fan-speed changes instead of abrupt full-speed operation. The 16-QSOP surface-mount package is suitable for compact production boards.
A key design consideration is validating remote-diode electrical characteristics, sensor placement, fan-drive polarity, and SMBus configuration against the manufacturer datasheet. Because the provided search data does not expose exact timing, voltage, current, resolution, or absolute-maximum values for every parameter, those details are marked as needed rather than inferred. This page combines verified distributor facts, official-datasheet findings, and explicit engineering data gaps.
Unlike a simple fan switch, the ADT7475ARQZ-REEL adds active temperature feedback and programmable fan-speed control, helping systems balance thermal margin against fan noise and power. This synthesis is intended to support component selection, schematic planning, and qualified drop-in replacement research.
直接替换替代料： ADT7475ARQZ-REEL ——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：
该产品暂无直接替换替代料。
请求替代料ADT7475ARQZ-REEL 最大额定值与电气特性
| Product Type | dBCool remote thermal monitor and fan controller |
| Temperature Monitor Range | -40°C to 125°C |
| Extended Temperature Measurement Range | Up to 191°C |
| Fan Count | Up to 4 fans |
| Fan Drive Signals | High-frequency and low-frequency |
| Internal Temperature Sensors | 1 on-chip sensor |
| Remote Temperature Sensors | 2 remote sensor diodes |
| Digital Interface | SMBus output |
| Control Method | PWM fan-speed control |
| 封装 | 16-QSOP |
| 安装类型 | Surface mount |
| Supplier Operating Temperature | -40°C to 125°C |
| Application Category | Active system cooling |
| RoHS 状态 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
ADT7475ARQZ-REEL 16-qsop 引脚配置指南
ADT7475ARQZ-REEL（16-qsop 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： ADT7475ARQZ-REEL.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADT7475ARQZ-REEL 适用于 8 应用s: Server and Computing Enclosures, Storage and RAID Systems, Communications and Network Equipment, Industrial Control Systems, Notebook and Portable Thermal Control, Audio and Low-Noise Systems, Battery-Powered Equipment, Robotics and Embedded Platforms.
Server and Computing Enclosures
The ADT7475ARQZ-REEL fits compact computing systems that use up to four fans and need temperature-responsive airflow. One internal sensor and two remote sensor-diode inputs can represent controller-local, processor-area, and memory-area thermal conditions, while PWM control lets each installed fan follow system demand. This architecture can reduce unnecessary full-speed operation, although the verified data does not quantify power savings. Before deployment, verify supply limits, fan-starting current, PWM compatibility, SMBus behavior, and sensor placement against the onsemi datasheet.
Storage and RAID Systems
ADT7475ARQZ-REEL is appropriate for storage and RAID enclosures where multiple drives create changing thermal gradients. The two remote diode channels can monitor representative hot locations rather than depending solely on the controller's internal junction temperature, while the on-chip input adds another control point. Supporting up to four fans gives designers a single controller for common enclosure arrangements. Validate airflow direction, sensor placement, alarm thresholds, and maximum cable or trace effects before production use.
Communications and Network Equipment
The ADT7475ARQZ-REEL can support communications equipment with one to four cooling fans and a need for local thermal supervision. SMBus output permits a system controller to observe or configure the device, while variable fan-speed control helps balance acoustic limits against cooling demand. This is relevant to access points, switches, and edge appliances where noise and energy use matter. Confirm that the selected fan types support the available high- or low-frequency drive mode and that all required pins and ratings match the existing schematic.
Industrial Control Systems
ADT7475ARQZ-REEL can supervise cooling in industrial controllers, test equipment, and automation enclosures exposed to changing internal temperatures. Its one internal and two remote temperature channels provide a compact basis for multi-zone thermal control, while the four-fan capability fits systems using redundant or mixed airflow hardware. PWM-based regulation can respond to load changes instead of running every fan continuously. Engineers should validate operating-temperature margins, sensor accuracy, fault response, and enclosure airflow during thermal testing.
Notebook and Portable Thermal Control
The ADT7475ARQZ-REEL may suit compact portable equipment where multiple small fans, acoustic limits, and changing component loading require active thermal feedback. Remote temperature-sensor channels can track processors or memory away from the controller, and PWM control can reduce fan activity during lighter loads. Its suitability depends on available supply voltage, fan current, control interface, and package space; those values are not present in the verified excerpts. Prototype the fan startup and acoustic behavior rather than assuming compatibility with every notebook cooling topology.
Audio and Low-Noise Systems
ADT7475ARQZ-REEL directly targets cooling systems where acoustic noise and power consumption matter. High- and low-frequency fan-drive choices provide flexibility, while temperature-based PWM control can avoid constant maximum-speed operation. In an audio amplifier, workstation, or quiet desktop, slower fans at moderate thermal load may improve the listening environment, though the benefit is system-specific and must be measured. Select fans that operate correctly with the chosen drive mode and validate coil noise, airflow, and thermal response in the final enclosure.
Battery-Powered Equipment
ADT7475ARQZ-REEL can contribute to thermal control in battery-powered equipment that uses one or more compact cooling fans. By increasing fan activity only when internal sensors indicate greater thermal demand, a control strategy may reduce unnecessary cooling power, which is especially useful in portable systems. The supplied evidence confirms four-fan control, remote sensing, and PWM operation but does not provide standby current or operating-voltage values. Those parameters must be checked before estimating battery-life benefits or designing the power tree.
Robotics and Embedded Platforms
ADT7475ARQZ-REEL can manage fans in robot controllers, autonomous platforms, and embedded computing modules exposed to variable motor or processor loading. Two remote diode inputs allow temperature measurements near separate high-power sections, while the internal sensor provides local context. PWM control helps balance airflow against noise and mechanical vibration, both relevant to mobile equipment. Validate sensor electricals, fan robustness, vibration margin, and thermal thresholds for the final enclosure and operating environment.
工程参考数据： ADT7475ARQZ-REEL ——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 |
|---|---|
| Brand | onsemi |
| Package | 16-QSOP |
| Fan Count | Up to 4 fans |
| Temperature Sensors | 1 internal and 2 remote sensor diodes |
| Temperature Monitor Range | -40°C to 125°C |
| Extended Measurement Range | Up to 191°C |
| Fan Drive | High-frequency and low-frequency signals |
| Digital Interface | SMBus output |
| Control Method | PWM fan-speed control |
| Verified Unit Price | $2.3546 as of 2026-10-21 |
关键差异点
- Four-fan integration in one controller （对比 ADT7475ARQZ-RL7)
- Distributed thermal monitoring （对比 ADT7475ARQZ-RL7)
- Acoustic and power control flexibility （对比 ADT7475ARQZ-RL7)
- System-level digital observability （对比 ADT7475ARQZ-RL7)
设计说明
Use the official ADT7475 datasheet pinout and layout example before routing the 16-QSOP device. Keep remote temperature-sensor traces away from fan outputs, switching nodes, high-current rails, and noisy digital clocks because coupling can corrupt diode-based temperature measurements. Confirm whether the selected QSOP footprint has an exposed pad and follow the manufacturer's land pattern and thermal-via guidance exactly. The supplied data does not include pin numbering, so assigning connections from distributor summaries would be unsafe.
Validate fan-starting current, drive voltage, cable length, and connector resistance against the controller's electrical limits before enabling cooling hardware. A fan that operates normally while spinning may still draw a higher inrush current at startup, particularly in a cold enclosure. Use the manufacturer's recommended fan-drive configuration and confirm that each selected fan supports either the low- or high-frequency drive method. Supply-voltage and output-current limits are marked as data needed because they are absent from the supplied excerpts.
Place remote temperature sensors near representative heat sources, but avoid mounting them directly where airflow is stagnant or where a heatsink mechanically changes the intended thermal path. Compare sensor location with controller and component temperature during worst-case operation so that the control curve responds to the protected area rather than an unrepresentative point. The ADT7475 supports one internal and two remote sensor channels, but channel assignment, accuracy, and conversion timing must be verified in the official datasheet.
Do not treat ADT7475ARQZ-RL7 or a functionally similar competitor controller as a drop-in replacement without an approved cross-reference. The alternatives search identified ADT7475ARQZ-RL7 in comparison pages, but it did not verify identical ordering, package, and qualification details. Likewise, the target's -REEL suffix identifies an orderable packaging form. Confirm the exact suffix, lifecycle status, pinout, exposed-pad requirements, and temperature grade before transferring a design or placing a production order.
合规信息
The supplied search results do not provide verified target-specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. AEC-Q100 is marked not applicable because the supplied evidence does not identify this part as an automotive-qualified variant.
