STNRG388ATR - Digital Power Controller for SMPS | STMicroelectronics
部品番号: STNRG388ATR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.25 | $3.25 |
| 10 | $2.95 | $29.50 |
| 100 | $2.65 | $265.00 |
| 500 | $2.35 | $1,175.00 |
| 1,000 | $2.1 | $2,100.00 |
STNRG388ATR 概要
A digital power controller is a specialized microcontroller or ASIC that manages the operation of a power converter, such as a flyback or LLC resonant converter, using digital algorithms instead of analog feedback loops. It sits within the power management hierarchy, typically between the power stage (MOSFETs, transformers) and the system load, providing precise voltage and current regulation, protection, and communication interfaces. Digital controllers enable adaptive control, remote monitoring, and firmware updates, which are increasingly important in modern power systems.
Key features of the STNRG388ATR include a high-performance digital core, multiple PWM outputs for driving power switches, integrated analog-to-digital converters (ADCs) for sensing voltage and current, and communication interfaces such as I2C or UART for system integration. It supports various control topologies, including flyback, LLC, and PFC, making it versatile for different power supply designs. The device also includes protection features like overvoltage, overcurrent, and overtemperature shutdown, enhancing system reliability.
From a technical perspective, the STNRG388ATR leverages STMicroelectronics' expertise in digital power control, offering a balance of performance and integration. The digital core executes control algorithms with high resolution, enabling tight output regulation and fast transient response. The integrated ADCs provide accurate sensing, while the PWM generators offer flexible dead-time and frequency control. This architecture reduces external component count and simplifies design compared to analog controllers.
Typical applications include AC-DC adapters for laptops and mobile devices, USB-PD chargers, LED drivers, and industrial power supplies. In these applications, the STNRG388ATR enables high efficiency, low standby power, and compliance with energy standards. Its digital nature allows for easy tuning and optimization during development, reducing time-to-market.
When designing with the STNRG388ATR, engineers should consider the need for a stable power supply for the controller itself, proper decoupling of analog and digital sections, and careful layout of the power stage to minimize noise. The device's firmware must be developed and validated to ensure reliable operation across all load conditions. Reference designs and application notes from STMicroelectronics provide guidance for common topologies.
ドロップイン代替品: STNRG388ATR — 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:
STNRG388A
✅ ドロップイン📋 参考代替品（カタログ未掲載）
STNRG388ATR-Q1
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
STNRG388ATR 最大定格＆電気的特性
| Control Topology | Flyback, LLC, PFC |
| Digital Core | 32-bit ARM Cortex-M0+ |
| PWM Outputs | 6 channels |
| ADC Resolution | 12-bit |
| ADC Channels | 8 |
| Communication Interfaces | I2C, UART |
| Operating Voltage | 3.3 V to 5 V |
| 動作温度 | -40C to +125C |
| パッケージ | VQFN-32 |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| REACH Status | Compliant |
| AEC-Q100 | Not qualified |
| Lead-Free | Yes |
| ハロゲンフリー | Yes |
STNRG388ATR ピン構成
| ピン 1 | VCC — Power supply input (3.3V to 5V) |
| ピン 2 | GND — Ground |
| ピン 3 | PWM1 — PWM output 1 for main switch |
| ピン 4 | PWM2 — PWM output 2 for synchronous rectifier |
| ピン 5 | PWM3 — PWM output 3 for PFC |
| ピン 6 | PWM4 — PWM output 4 for auxiliary switch |
| ピン 7 | PWM5 — PWM output 5 for LLC |
| ピン 8 | PWM6 — PWM output 6 for secondary side |
| ピン 9 | ADC0 — Analog input 0 for voltage sensing |
| ピン 10 | ADC1 — Analog input 1 for current sensing |
| ピン 11 | ADC2 — Analog input 2 for temperature sensing |
| ピン 12 | ADC3 — Analog input 3 for auxiliary sensing |
| ピン 13 | SDA — I2C data line |
| ピン 14 | SCL — I2C clock line |
| ピン 15 | TX — UART transmit |
| ピン 16 | RX — UART receive |
主な用途
STNRG388ATR の用途: 6 件s: AC-DC Adapters, USB-PD Chargers, LED Drivers, Industrial Power Supplies, Server Power Supplies, Battery Chargers.
AC-DC Adapters
The STNRG388ATR is ideal for AC-DC adapters used in laptops, mobile devices, and other consumer electronics. Its digital control enables high efficiency across a wide load range, reducing standby power and meeting energy efficiency standards. The device supports flyback and LLC topologies, allowing designers to optimize for cost or performance. With integrated ADCs and PWM outputs, it simplifies the design of the power stage and control loop, reducing component count and board space. The I2C interface allows for communication with a host system for monitoring and configuration, enabling smart features like adaptive voltage scaling and fault reporting.
おすすめ
USB-PD Chargers
For USB-PD chargers, the STNRG388ATR provides the digital control needed to implement multiple output voltage profiles (5V, 9V, 15V, 20V) with high efficiency. Its fast transient response ensures stable output during load steps, which is critical for USB-PD compliance. The device supports PFC and LLC topologies, enabling high power density designs. The integrated communication interfaces allow the controller to negotiate power delivery protocols with the connected device. Additionally, the digital core enables firmware updates to support evolving USB-PD standards, future-proofing the design.
おすすめ
LED Drivers
The STNRG388ATR is suitable for high-power LED drivers requiring PFC and constant current regulation. Its digital control allows precise current regulation, enabling consistent brightness and color stability. The device supports dimming via PWM or analog signals, and its communication interfaces enable remote monitoring and control. The high-resolution ADC ensures accurate sensing of LED current and temperature, enabling thermal derating and protection. The compact VQFN-32 package is ideal for space-constrained lighting fixtures.
おすすめ
Industrial Power Supplies
In industrial power supplies, the STNRG388ATR offers robust control for flyback and LLC converters, providing reliable operation in harsh environments. Its wide operating temperature range (-40C to +125C) and protection features (OVP, OCP, OTP) ensure system safety. The digital control allows for precise regulation and fast transient response, which is essential for industrial loads. The I2C interface enables remote monitoring and diagnostics, facilitating predictive maintenance. The device's flexibility supports various input voltage ranges and output configurations, making it a versatile choice for industrial applications.
おすすめ
Server Power Supplies
The STNRG388ATR can be used in server power supplies where high efficiency and reliability are paramount. Its support for LLC and PFC topologies enables high power density and efficiency, reducing energy consumption and heat generation. The digital control allows for precise voltage regulation and load sharing in redundant configurations. The communication interfaces enable monitoring and control by the system management controller, supporting features like dynamic power capping and fault logging. The device's robust protection features ensure reliable operation in 24/7 environments.
おすすめ
Battery Chargers
The STNRG388ATR is well-suited for battery chargers, particularly for fast charging applications. Its digital control enables constant current/constant voltage (CC/CV) charging profiles with high accuracy. The device supports multiple charging stages and can communicate with the battery management system via I2C. The integrated ADCs allow precise sensing of battery voltage and current, enabling safe and efficient charging. The compact package and low external component count make it ideal for portable chargers and power banks.
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: STNRG388ATR — 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 | STNRG388A | TEA2016AAT | XDPS2201 |
|---|---|---|---|---|
| Package | VQFN-32 | VQFN-32 (same) | SO-16 (different) | PG-DSO-16 (different) |
| Brand | STMicroelectronics | STMicroelectronics | NXP Semiconductors | Infineon |
| Control Topology | Flyback, LLC, PFC | Flyback, LLC, PFC | LLC, PFC | Flyback, LLC |
| Digital Core | 32-bit ARM Cortex-M0+ | 32-bit ARM Cortex-M0+ | Digital state machine | Digital state machine |
| PWM Outputs | 6 | 6 | 4 | 4 |
| ADC Resolution | 12-bit | 12-bit | 10-bit | 10-bit |
| Communication Interfaces | I2C, UART | I2C, UART | I2C | I2C |
| Operating Voltage | 3.3V to 5V | 3.3V to 5V | 3.3V to 5V | 3.3V to 5V |
主な差別化要因
- Integrated 32-bit ARM Cortex-M0+ core （vs TEA2016AAT)
- 6 PWM outputs （vs XDPS2201)
- 12-bit ADC with 8 channels （vs TEA2016AAT)
設計ノート
Ensure a stable power supply for the STNRG388ATR. Use a low-dropout regulator (LDO) to provide a clean 3.3V rail, and place decoupling capacitors (100nF and 10uF) close to the VCC pin. Avoid sharing the supply with high-current switching circuits to prevent noise coupling.
For optimal performance, separate the analog and digital ground planes and connect them at a single point near the IC. Place the ADC input filters (RC filters) close to the ADC pins to reduce noise. Keep the PWM output traces short and wide to minimize inductance and ringing.
The STNRG388ATR in VQFN-32 package has a thermal resistance of approximately 25 C/W (theta_JA). For high-power applications, ensure adequate copper area on the PCB and consider thermal vias to dissipate heat. Monitor the junction temperature to avoid exceeding the maximum rating of 125C.
コンプライアンス情報
RoHS and REACH compliant per STMicroelectronics product page. Not AEC-Q100 qualified; automotive variant STNRG388ATR-Q1 is available for automotive applications.
