Stock Name: 希荻微
Stock Code: 688173
- All
- Product Management
- News Information
- Introduction Content
- Corporate Outlets
- Frequently Asked Questions
- Corporate Video
- Corporate Album
Stock Name: 希荻微
Stock Code: 688173
- All
- Product Management
- News Information
- Introduction Content
- Corporate Outlets
- Frequently Asked Questions
- Corporate Video
- Corporate Album
Halo Microelectronics’ wholly owned subsidiary, Chengxinwei, has launched the CX8836 four-switch buck-boost chip, enabling high-efficiency fast charging and wide-voltage power supply solutions.
September 18, 2026
Halo Microelectronics’ wholly owned subsidiary, Shenzhen Chengxinwei Technology Co., Ltd. (referred to as “Chengxinwei”), has officially launched the CX8836—a high-performance four-switch synchronous buck-boost control chip. With a wide input and output voltage range, peak conversion efficiency of up to 96%, and comprehensive built-in protection features, this product is specifically designed for applications such as car chargers, USB PD power supplies, and portable device power management, helping customers achieve compact, high-power, and highly reliable power supply designs.
Product Overview
The CX8836 is a four-switch synchronous buck‑boost control IC that supports a wide input voltage range of 4.5 V to 40 V and a wide output voltage range of 3 V to 25 V, with an output current capability of up to 10 A. In both buck and boost operating modes, the device employs current-mode control, delivering excellent load‑regulation performance and ensuring stable, precise output voltages across varying input and output conditions. Output voltage regulation accuracy reaches ±2%, and the operating mode can be configured as either DCM or CCM, providing flexible adaptation to diverse power‑supply design requirements.
Core Features
The CX8836 features an adjustable output voltage range that supports PD 3.0 (PPS) and QC 4.0 fine‑voltage regulation. Its switching frequency and soft‑start time are both flexibly configurable, enabling engineers to optimize system performance and electromagnetic compatibility for a variety of application scenarios. The chip integrates built-in constant‑current control; it monitors the output current via the ISNSP/ISNSN pins and, in conjunction with an external sense resistor, provides programmable output current limiting and short‑circuit protection.
|
Input voltage: 4.5V – 40V DC |
Output voltage: 3V – 25V DC adjustable |
|
Switching frequency: 100 kHz – 400 kHz adjustable |
Peak efficiency: Up to 96% |
|
Constant voltage accuracy: ±2% |
Encapsulation: QFN24L-4×4 |
Comprehensive protection mechanism
To ensure the product’s safety and reliability in complex operating environments, the CX8836 incorporates multiple protection features, including:
- Cycle-by-cycle Current Limiting : In buck mode, the valley current threshold is 76 mV; in boost mode, the peak current threshold is 170 mV.
- Input Undervoltage Lockout (UVLO) Typical threshold: 4.5 V, with 650 mV hysteresis.
- Output Overvoltage Protection (OVP)
- Constant Current Output Control : 50 mV reference voltage; programmable current limit via an external sense resistor; supports short-circuit protection (SCP)
- Over-Temperature Protection (OTP) : Over-temperature shutdown threshold 150°C
- ESD protection HBM +2kV and MM +200V multi‑level protection work in concert, covering a wide range of fault scenarios—from input abnormalities to output short circuits—providing robust assurance for the long‑term stable operation of end products.
Technical Specifications Overview
| Parameter | Specifications |
|
Chip model |
CX8836 |
|
Product Type |
40V High-Efficiency Synchronous Buck-Boost DC-DC Converter |
|
Input voltage range |
4.5V – 40V DC |
|
Output voltage range |
3V – 25V DC (adjustable) |
|
Switching frequency |
100 kHz – 400 kHz (adjustable, set via the RT pin) |
|
Constant voltage accuracy |
±2% |
|
Peak efficiency |
96% |
|
Internal VCC voltage |
5.4V |
|
Work Mode |
DCM / CCM (MODE pin selectable) |
|
Constant Current Reference |
50 mV (ISNSP - ISNSN) |
|
Input Undervoltage Lockout Threshold |
4.5 V (typical), hysteresis 650 mV |
Application scenarios
CX8836 is suitable for a wide range of power-management applications, particularly well‑suited for fast‑charging and power‑delivery solutions that demand both compact size and high efficiency:
- Car charger — Based on the CX8836, a 45W PD fast-charging car charger solution can be developed. The single‑C‑port 65W demo board measures just 28×12 mm, making it ideal for ultra‑compact embedded car charger designs.
- USB PD power supply — Supports low-voltage regulation compliant with PD 3.0 (PPS) and QC 4.0, compatible with mainstream fast-charging standards.
- Power supply for portable devices — Wide input and output voltage ranges, coupled with high efficiency, meet the flexible power‑supply requirements of mobile devices.
- DC Voltage Conversion Module — A step-up/step-down converter suitable for 12V electrical devices such as RVs, trucks, solar power systems, and wind power systems.
About Chengxinwei
Shenzhen Chengxinwei Technology Co., Ltd. was founded in 2009 and is headquartered in Shenzhen. As a national high-tech enterprise, the company focuses on the R&D, design, and sales of high-performance analog and mixed-signal integrated circuits. It has been recognized as a “Specialized, Fine, Distinctive, and Innovative” SME in Shenzhen and designated a “Little Giant” enterprise under the same program. The founding team comprises veterans from globally renowned IC design firms, and the company has developed a diverse portfolio of power management chips characterized by high precision, low power consumption, high efficiency, and exceptional reliability. These products have been successfully adopted by leading domestic and international brands, including Lenovo, Xiaomi, BYD, Anker, Philips, Belkin, ZTE, and Luxshare Precision, with strategic partnerships established across these sectors. The company’s solutions are widely used in automotive electronics, consumer electronics, smart home devices, security surveillance, power tools, and low‑power energy storage, and it is committed to delivering safe, stable, reliable, and user‑friendly power management solutions to its customers.
Technical documentation and samples for the CX8836 are available on the Chengxinwei official website at www.cxwic.com.
About Halo Microelectronics
Halo Microelectronics Co., Ltd. (stock code: 688173) is a leading domestic analog chip manufacturer and a national “Little Giant” enterprise specializing in niche, specialized, and innovative fields. The company focuses on developing analog and power-management integrated circuits, striving to provide customers with a comprehensive portfolio of analog chips that span diverse end‑application markets, thereby enabling high‑efficiency smart system applications worldwide. Since 2012, Halo Microelectronics has been driving innovation in mobile, IoT, automotive, and industrial power systems, building a high‑performance product line capable of competing with international analog chip industry leaders. The company has earned widespread recognition from numerous mainstream domestic and international customers, achieving deep integration between technological advances and industrial applications, and delivering high‑performance, highly reliable analog integrated circuit products and solutions. For more information, please visit: http://www.halomicro.cn.
About Halo Microelectronics
Halo Microelectronics(Stock Code: 688173) develops analog and power management integrated circuits enabling energy-efficient smart systems. Since 2012, Halo Microelectronics has been driving innovation in Mobile, IoT, and Automotive systems. Find out more at: http://www.halomicro.com.
Company WeChat Official Account
CSS / JS 文件放置地