PL84052 is a PWM controller, designed for highperformance synchronous Buck DC/DC applications with input voltages 3.0 V to 32 V(36 V maximum).PL84052 employs Constant ON time control. The switching frequency could be set to 150kHz,300kHz600kHz or 1200kHz based on different resistor value between FREQ pin and GND pin. The device also features a programmable soft-start function and offers all kinds of protection features including cycle-by-cycle current limiting, input under voltage lockout (UVLO),output over voltage protection (OVP), thermal shutdow and output short protection etc.

The RY9121 is a high frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to provide a 2A continuous output current over a wide input supply range, with excellent load and line regulation. ECOT control operation provides very fast transient response and easy loop design as well as very tight output regulation. The RY9121 requires a minimal number of readily available, external components and is available in a space saving SOT23-6 package.

The RY9121E is a high frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to provide a 2A continuous output current over a wide input supply range, with excellent load and line regulation. ECOT control operation provides very fast transient response and easy loop design as well as very tight output regulation. The RY9121E requires a minimal number of readily available, external components and is available in a space saving SOT23-6 package.

The RY8336 is a high frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to provide a 3A continuous current over a wide input supply range, with excellent load and line regulation. The RY8336 requires a minimal number of readily available, external components and is available in a space saving ESOP8 package.

The RY8320 is a high frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to provide a 2A continuous current over a wide input supply range,with excellent load and line regulation. The RY8320 requires a minimal number of readily available, external components and is available in a space saving SOT23-6 package

The RY8510 device is high-efficiency, synchronous step-down DC/DC regulators. With a wide input range, it issuitable for a wide range of applications, such as power conditioning from unregulated sources. It features a lowRDSON (500mΩ/300mΩ typical) internal switch for maximum efficiency (92% typical). Supports PSM mode, theoperating frequency is fixed at 850kHz, allowing the use of small external components while still being able to havelow output voltage ripple. With OVP function, the IC can stand off input voltage as high as 50V

The RY8411 device is high-efficiency, synchronous step-down DC/DC regulators. With a wide input range, it is suitable for a wide range of applications, such as power conditioning from unregulated sources. It features a lowRDSON(250mΩ/150mΩ typical) internal switch for maximum efficiency (92% typical). Supports PSM mode, theoperating frequency is fixed at 800kHz, allowing the use of small external components while still being able to havelow output voltage ripple. With OVP function, the IC can stand off input voltage as high as 42V.

The RY8310 is a high frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to provide a 1A continuous current over a wide input supply range, with excellent load and line regulation. The RY8310 requires a minimal number of readily available, external components and is available in a space saving SOT23-6 package.

SLM6900是一款支持多节多类型锂电池或磷酸铁锂电池的充电电路，它预置了三节和四节锂电池充电模式，同时也支持通过外围分压电阻调节的其它输出电压模式。它是采用300kHz固定频率的同步降压型转换器，因此具有很高的充电效率，自身发热量极小。 SLM6900包括完整的充电终止电路、自动再充电和一个精确度达±1.0%的充电电压控制电路，内部集成了输入低电压保护、输出短路保护、电池温度保护等多种功能。 SLM6900采用TSSOP-14L封装，外围应用简单，作为大容量电池的高效充电器。

NS4054 是一款 4.2V 单节锂电池充电管理芯片。采用三段式充电过程，即涓流、恒流和恒压三个充电阶段。芯片还支持 0VBAT 浮充。充电电流可以通过 RPROG电阻设定。芯片较少的外部元件数目使得 NS4054 成为便携式应用的理想选择。 NS4054 内置有防反接电路模块，在电池反接时不会损坏芯片。同时芯片内置有过温保护功能，在芯片温度过高时会自动调节充电电流，以便在大功率操作或高环境温度条件下对芯片温度加以限制。

SLM6600(S) 是一款面向5V适配器的3A锂离子 电池充电器。它是采用800KHz固定频率的同步降压型转换器，具有高达92%以上的充电效率，自身发热量极小。 SLM6600(S)包括完整的充电终止电路、自动再充电和一个精确度达±1%的4.2V预设充电电压，内部集成了防反灌保护、输出短路保护、芯片及电池温度保护等多种功能。 SLM6600(S)采用带散热片的SOP8封装，并且只需极少的外围元器件，因此能够被嵌入在各种手持式应用中，作为大容量电池的高效充电器。

HTC6232是一款内置同步升压的高集成2A电池充电芯片，支持2节或3节串联锂电池充电。