STNRG388ATR - Digital Power Controller for SMPS | STMicroelectronics
MPN: STNRG388ATR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for STNRG388ATR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
STNRG388A
β Drop-Inπ Reference alternative (not in catalog)
STNRG388ATR-Q1
β Drop-Inπ Reference alternative (not in catalog)
STNRG388ATR Maximum Ratings & Electrical Characteristics
| 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 |
| Operating Temperature | -40C to +125C |
| Package | VQFN-32 |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| REACH Status | Compliant |
| AEC-Q100 | Not qualified |
| Lead-Free | Yes |
| Halogen-Free | Yes |
STNRG388ATR Pin Configuration
| Pin 1 | VCC β Power supply input (3.3V to 5V) |
| Pin 2 | GND β Ground |
| Pin 3 | PWM1 β PWM output 1 for main switch |
| Pin 4 | PWM2 β PWM output 2 for synchronous rectifier |
| Pin 5 | PWM3 β PWM output 3 for PFC |
| Pin 6 | PWM4 β PWM output 4 for auxiliary switch |
| Pin 7 | PWM5 β PWM output 5 for LLC |
| Pin 8 | PWM6 β PWM output 6 for secondary side |
| Pin 9 | ADC0 β Analog input 0 for voltage sensing |
| Pin 10 | ADC1 β Analog input 1 for current sensing |
| Pin 11 | ADC2 β Analog input 2 for temperature sensing |
| Pin 12 | ADC3 β Analog input 3 for auxiliary sensing |
| Pin 13 | SDA β I2C data line |
| Pin 14 | SCL β I2C clock line |
| Pin 15 | TX β UART transmit |
| Pin 16 | RX β UART receive |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
STNRG388ATR is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for STNRG388ATR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Integrated 32-bit ARM Cortex-M0+ core (vs TEA2016AAT)
- 6 PWM outputs (vs XDPS2201)
- 12-bit ADC with 8 channels (vs TEA2016AAT)
Design Notes
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.
Compliance Information
RoHS and REACH compliant per STMicroelectronics product page. Not AEC-Q100 qualified; automotive variant STNRG388ATR-Q1 is available for automotive applications.
