Shenzhen CXW Technology., Co Ltd
15 years of experience
+86 19166254725 Chinese
Search for the model you want?
DC-DC power supply chip
HOME>PRODUCTS>DC-DC power supply chip

  • Model No. :

    CX8903

  • Withstand voltage :

    100V

  • Output voltage :

    ADJ

  • Output current :

    3A

  • Working mode :

    Asynchronous

  • Packaging :

    SOP-8L
Free Sample
Datesheet

CATEGORY
  • product details

Overview:

CX8903 is a switch buck DC-DC controller that supports a wide range of input voltages, with a maximum input voltage of 100V.

The CX8903 features low standby power consumption, high efficiency, low ripple, excellent bus voltage regulation, and load regulation.

The CX8903 integrates a 100V/90mΩ power transistor that supports a 3A current output. The output voltage can be set by adjusting the voltage divider resistors on the FB pin.

The CX8903 uses a fixed frequency PWM control method, with a typical switching frequency of 100KHz. It enters burst mode under light load to achieve high conversion efficiency.

The CX8903 also integrates soft start and over-temperature protection circuits, as well as output short-circuit protection, current limiting protection, and cycle-by-cycle current detection functions, enhancing system reliability.

The CX8903 is available in an SOP-8L package and has a very simple peripheral design, making it suitable for a wide range of input DC-DC buck applications.


Features:

  • Built-in 100V/90mΩ N-MOSFET

  • Wide voltage input range from 10V to 100V

  • Minimal peripheral components required

  • Enable pin shutdown for zero power consumption

  • Output short-circuit hiccup protection (The function of output short-circuit hiccup protection is that when the output current exceeds the OCP (Over Current Protection) threshold or a short circuit occurs, the chip controller will shut down the output. Since it is unknown when the output short circuit will be cleared, the controller needs to periodically attempt to turn on the output to determine if it is permissible to enable the output. This cycle of attempts and shutdowns is known as the output short-circuit hiccup protection mode. The benefit of this feature is that it prevents overcharging and thus protects the chip. Once the short-circuited load is removed, the output is restored, unlike the earliest products that required a complete power cut and reinsertion after a short circuit.)

  • Over-temperature protection

  • Per-switching cycle current limiting protection

  • Flexible adjustable output voltage and current

  • External loop compensation

  • Packaged in SOP-8L


Application:

  • Twist scooter controller

  • Electric vehicle converter

  • Fast charging power supply

  • Electric vehicle alarm power source

  • Inverter system

  • Industrial control system non-isolated PoE (Power over Ethernet), IP cameras


product tag :
Recommend
#
Details
CX7545ES

#
Details
CX7539F

CX7539F is a high-performance synchronous rectification control circuit for the secondary side of switching power supply. In the application of low-voltage and high-current switching power supply, it can easily meet the energy efficiency of class 6, and is an ideal solution for ultra-low conduction voltage drop rectifier devices. The chip can support switching frequency applications as high as 150kHz, as well as switching power mode applications such as CCM/QR/DCM. The loss caused by its extremely low turn-on voltage drop is far less than the turn-on loss of Schottky diode, which greatly improves the conversion efficiency of the system and greatly reduces the temperature of the rectifier device.<br/><br/>CX7539F is a synchronous rectifier switch with built-in high voltage NMOSFET, and it has extremely low internal resistance, which can provide the application output of the system up to 5 years. IC determines the switching state of integrated MOSFET by detecting its source-drain voltage, which is compatible with flyback converters in continuous mode, discontinuous mode and quasi-resonant mode.<br/><br/>CX7539F adopts special self-power supply technology, which can ensure that the chip will not work under voltage in both constant current and constant voltage working states of the primary control system.

#
Details
CX7538BS

CX7538BS is a high-performance secondary side synchronous rectification control circuit for switch-mode power <br/><br/>supplies. It easily meets the Level VI energy efficiency requirements in low-voltage, high-current switch-mode power <br/><br/>supply applications, making it an ideal solution for ultra-low forward voltage drop rectification devices. It also supports <br/><br/>various operating modes of switch-mode power supplies, such as CCM, QR , and DCM . Its extremely low forward <br/><br/>voltage drop results in much less conduction loss compared to Schottky diodes, greatly improving the system&#039;s <br/><br/>conversion efficiency and significantly reducing the temperature of the rectification device.<br/><br/><br/><br/>The CX7538BS chip features an NMOSFET synchronous rectification switch with a built-in voltage tolerance of 60V <br/><br/>and an extremely low internal resistance, with a typical RdsON as low as 12mΩ, providing the system with an output <br/><br/>capability up to 4A. The chip determines its switching state by detecting the source-drain voltage of the built-in <br/><br/>MOSFET, making it compatible with flyback converters in continuous mode, discontinuous mode, and quasi-resonant <br/><br/>operation modes.

#
Details
CX8903

80V输入，1.5A输出，异步降压转换器&amp;amp;amp;amp;amp;amp;lt;br/&amp;amp;amp;amp;amp;amp;gt;概述：&amp;amp;amp;amp;amp;amp;lt;br/&amp;amp;amp;amp;amp;amp;gt;CX8803是一款输入电压达9V至80V的高电压非同步降压转换器。&amp;amp;amp;amp;amp;amp;lt;br/&amp;amp;amp;amp;amp;amp;gt;CX8803集成了一个100V400-mΩ的高压侧MOSFET。&amp;amp;amp;amp;amp;amp;lt;br/&amp;amp;amp;amp;amp;amp;gt;CX8803可提供1.5A的连续负载电流，效率高达95%。&amp;amp;amp;amp;amp;amp;lt;br/&amp;amp;amp;amp;amp;amp;gt;CX8803采用内置补偿的固定频率峰值电流控制，无需使用外部元件。&amp;amp;amp;amp;amp;amp;lt;br/&amp;amp;amp;amp;amp;amp;gt;高端MOSFET的逐周期电流限制可在过载情况下保护转换器。&amp;amp;amp;amp;amp;amp;lt;br/&amp;amp;amp;amp;amp;amp;gt;如果过电流状况持续时间超过目前的时间，就会触发打嗝模式保护。&amp;amp;amp;amp;amp;amp;lt;br/&amp;amp;amp;amp;amp;amp;gt;CX8803...

#
Details
CX8836

CX8836是一款具有宽输入电压：DC4.5V-40V,宽输出电压：DC3V-25V 的四开关同步升降压控制芯片;&lt;br/&gt;&lt;br/&gt;CX8836在降压和升压操作模式下均采用电流模式控制，以实现卓越的负载调整能力。&lt;br/&gt;&lt;br/&gt;CX8836支持频率可调，软启动可调。&lt;br/&gt;&lt;br/&gt;CX8836内置多种保护功能，包括逐周期限流、输入欠压锁定（UVLO）、输出过电压保护（OVP）和过温保护等保证在不同使用环境下产品安全。

#
Details
CX75GD080S

概述:&amp;amp;lt;br/&amp;amp;gt;CX75GD080S是一款集成高压GaNFET功率器件高频高性能准谐振式交直流转换功率开关，应用于27W内高性能、低待机功率、低成本、高效率的隔离型反激式开关电源。&amp;amp;lt;br/&amp;amp;gt;CX75GD080S的工作频率最高可达200KHZ，可全范围工作在准谐振模式，在轻载时则会工作于burst模式以提升效率, 将23kHz以下的音调能量降至最低，并在操作过程中消除音频噪声.&amp;amp;lt;br/&amp;amp;gt;CX75GD080S集成了完备的保护功能，包括：Vcc欠压保护（UVLO）,Vcc过压保护（Vcc_OVP）,输入欠压保护...

#
Details
CX8831CB


A single chip of CX8831CB integrates the synchronous buck DC-DC+ fast charging protocol, which minimizes 
the number of components outside the chip, effectively optimizes the BOM cost of the scheme, and provides 
customers with a DC...

#
Details
CX75GD025E

概述：&amp;lt;br/&amp;gt;CX75GD025E是一款集成高压GaNFET功率器件高频高性能准谐振式交直流转换功率开关，应用于45W内高性能、低待机功率、低成本、高效率的隔离型反激式开关电源。&amp;lt;br/&amp;gt;CX75GD025E的工作频率最高可达200KHZ，可全范围工作在准谐振模式，在轻载时则会工作于burst模式以提升效率, 将23kHz以下的音调能量降至最低，并在操作过程中消除音频噪声。&amp;lt;br/&amp;gt;CX75GD025E集成了完备的保护功能，包括：Vcc欠压保护（UVLO）,Vcc过压保护（Vcc_OVP）,输入欠压保护...

#
Details
CX75GD015E

CX75GD015E is a high-frequency and high-performance quasi-resonant AC-DC conversion power switch with integrated high-voltage GaNFET power device, which is applied to isolated flyback switching power supply with high performance, low standby power, low cost and high efficiency within 65W.<br/><br/>The working frequency of CX75GD015E can reach 200KHZ at most, and it can work in quasi-resonant mode in the whole range. Under light load, it will work in burst mode to improve efficiency, minimize the tone energy below 23kHz, and eliminate audio noise during operation.<br/><br/>CX75GD015E integrates complete protection functions, including: Vcc undervoltage protection (UVLO),Vcc overvoltage protection (Vcc_OVP), input undervoltage protection (Brown in), input overvoltage protection (Brown out), output overvoltage protection (VO_OVP), FB open and short circuit protection, secondary side SR short circuit protection, CS open and short circuit protection, etc.<br/><br/>CX75GD015E provides excellent electromagnetic interference performance, and provides a good design platform for a cost-effective flyback switching power supply system that requires ultra-low standby power consumption



HOME

PRODUCT

ABOUT

CONTACT