NX3223CPLR 南芯 内置四颗 MOS 管、高效率同步 22V 升降压转换器
产品概述
NX3223 是一款四开关同步升降压转换器,内置 4 路功率开关管。无论输出电压高于、低于或是等于输入电压,都可以实现优异的转换效率与稳压效果。
NX3223 支持超宽输入、输出电压范围:输入电压范围 2.7V~22V,输出电压范围 3V~22V,电感平均限流最高可达 10A。
NX3223 采用平均电流模式控制。输出电压由 FB 引脚的分压电阻网络进行调节。开关工作模式(PSM/FPWM)以及开关频率可通过外部配置设定。芯片还支持可编程输出限流,方便不同产品灵活设计。
NX3223 内置限流、输入欠压保护、输出过压保护、输出短路保护、FB 引脚短路保护以及过热保护,在各类异常工况下保障系统安全。
该芯片采用 22 引脚 3×3mm QFN 封装。
核心特性
1:高效率升降压转换
2:外围元器件少
3:内置低导通电阻功率开关管
4:宽输入电压范围:2.7V ~ 22V
5:宽输出电压范围:3V ~ 22V
6:FB 引脚接地时,可固定输出 5.1V
7:电感限流最高 10A
8:开关频率可选:250kHz / 500kHz / 800kHz / 1MHz
9:输出电流限制可调节
10:可选择强制 PWM 模式 / PSM 省电模式
11:使能 EN 控制,欠压锁定 UVLO 阈值可编程
12:内置软启动
13:输入、输出绝对过压保护
14:输出短路保护(打嗝模式)
15:过热关断保护
16:欠压保护
17:过压保护
18:PLQFN-22,3×3 封装
应用场景
墙插适配器
快充移动电源
USB Type‑C 扩展坞
无线充电器
工业电源
Description
NX3223 is a synchronous 4-switch buck-boost converter with four integrated switches. It provides excellent power efficiency and voltage regulation no matter whether the output voltage is higher, lower, or equal to the input voltage.
NX3223 supports a very wide input and output voltage range.It can support applications from 2.7V to 22V input range and 3V to 22V output range and provides up to 10A average inductor current limit.
NX3223 employs average current-mode control. The output voltage is adjusted by a divider resistor network on the FB pin. The switching mode (PSM/FPWM) and the switching frequency can be adjusted by the external setting. The device also provides a programmable output current limit which supports flexible design for different applications.
NX3223 supports internal current limit, input under-voltage protection, output over-voltage protection, output short protection, FB short circuit protection, and over-temperature protection to ensure safety under different abnormal conditions.
The IC is in a 22-pin 3*3 PLQFN package.
Features
1:High-Efficiency Buck-Boost Conversion
2: Few External Components
3: Integrated Low RDS(ON) Switches
4: Wide VIN Range: 2.7 V to 22 V
5: Wide VOUT Range:3V to 22V
6: Fixed 5.1V VOUT with FB tied to GND
7: Up to 10A Inductor Current Limit
8: 250K/500K/800K/1MHz Adjustable Switching Frequency
9:Adjustable Output Current Limit
10:Forced PWM Mode/ PSM Mode Selectable
11: EN control and Programmable UVLO
12:Internal Soft Start
13: Absolute Input and Output Over Voltage Protection
14: Output Short Protection with Hiccup Mode
15: Thermal Shutdown Protection
16: Under Voltage Protection
17: Over Voltage Protection
18: PLQFN-22 3 x 3 Package
Applications
Wall Adapter
Power Bank with Quick Charge
USB Type C Hub
Wireless Charger
Industry Power Supplies
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