The cxac8591 has a built-in green frequency reduction mode, which can adjust the working frequency according to the load situation, reduce the switching loss, thus obtaining lower standby power consumption and higher conversion efficiency. It provides instantaneous peak regulation function, that is, when the load suddenly exceeds the rated load, the IC internal frequency is increased rapidly to avoid saturation of the transformer. At the same time, cxac8591 provides a wealth of protection, including cycle by cycle overcurrent protection, overvoltage protection, overvoltage clamping, undervoltage protection, over temperature protection, overload protection, as well as soft start and intermittent operation mode functions. In case of failure, the chip will restart automatically until the failure is eliminated
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[ CXAC8591 ]"
目录
产品概述 返回TOP
CXAC8591是高度集成的电流模式PWM控制芯片，可提供高性能、低待机功耗、低成本的反激应用。 CXAC8591内置绿色降频工作模式，根据负载情况调节工作频率，减少了开关损耗，从而获得较低的待机功耗和较高的转换效率。其提供瞬时峰值调节功能，即在负载突然大幅超过额定负载时，将IC内部频率迅速增高以避免变压器出现饱和。同时CXAC8591提供了丰富的保护，包括：逐周期过流保护，过压保护，过压钳位， 欠压保护，过温保护，过载保护，同时具有软启动和间歇工作模式功能。一旦出现故障，芯片进入自动 重启状态直至故障排除。
产品特点 返回TOP
?专利的抖频功能改善了EMI特性
?Hi-mode（65kHz PWM）
?Eco-mode（绿色降频工作模式）
?Burst-mode（25kHz间歇工作模式)
?无音频噪声
?内部集成斜率补偿功能
?软启动功能
?全面的保护功能 逐周期过流保护 过载保护 VCC过压保护 过温保护
应用范围 返回TOP
?充电器
?电源适配器
? 机顶盒电源
?开放式离线开关电源
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产品封装图 返回TOP
电路原理图 返回TOP
相关芯片选择指南 返回TOP
| AC-DC(SSR) | ||||||||
| Product | Character | Standby Power | SW Voltage | VDD Operation Voltage | Adaptor Output Power | Open Frame Output Power | Frequency | Package |
| CXAC8579 | Low Standby-Power Off-line PWM converter | 0~650V | <50mW | 13Ω | 8W | 10W | 60kHz | DIP7 |
| CXAC8580 | Low Standby-Power Off-line PWM converters | 0~650V | <50mW | 4.5Ω | 12W | 15W | 60kHz | DIP7 |
| CXAC8581 | Low Standby-Power Off-line PWM converters | 0~650V | <50mW | 3.6Ω | 12W | 18W | 60kHz | DIP7 |
| CXAC8582 | Low Standby-Power Off-line PWM converters | 0~650V | <50mW | 13Ω | 8W | 10W | 60kHz | DIP7 |
| CXAC8583 | Low Standby-Power Off-line PWM converters | 0~650V | <50mW | 3.6Ω | 12W | 18W | 60kHz | DIP7 |
| CXAC8584 | Low Standby-Power Off-line PWM converters | 0~650V | <50mW | 2Ω | 18W | 24W | 60kHz | DIP7 |
| CXAC8585A | PWM converters | 0~730V | <300mW | 27Ω | - | 8W | 55kHz | DIP8/SOP8 |
| CXAC8585H | PWM converter | 0~800V | <150mW | 18Ω | 6W | 8W | 60kHz | DIP8/SOP7 |
| CXAC8586 | PWM converter | 0~800V | <150mW | 10Ω | 10W | 12W | 60kHz | DIP8/SOP7 |
| CXAC8583A | Low Standby-Power Off-line PWM converter | 0~900V | <50mW | 7Ω | 10W | 12W | 60kHz | DIP7 |
| CXAC8582T | Low Standby-Power Off-line PWM converter | 0~1000V | <50mW | 9Ω | 8W | 10W | 60kHz | DIP7 |
| Product | Character | Standby Power | Start-up | VDD Operation | Vcc_Clamp | Output | Frequency | Package |
| Current | Voltage | Power | ||||||
| CXAC8589 | PWM Controller | <150mw | 5uA | 10~26V | 32V | <40W | Adaptive | SOT23-6/DIP8 |
| CXAC8589A | PWM Controller | <100mw | 5uA | 10~26V | 32V | <40W | Adaptive | SOT23-6 |
| CXAC8590 | PWM Controller | <100mw | 5uA | 10~26V | 32V | <40W | 65kHz | SOT23-6/DIP8 |
| CXAC8590A | PWM Controller | <100mw | 5uA | 10~26V | 32V | <40W | 65kHz | SOT23-6/DIP8 |
| CXAC8591 | PWM Controller | <100mw | 2uA | 8~26V | 27V | <70W | 65kHz | SOT23-6 |
| CXAC8592 | PWM Controller | <300mw | 5.5uA | 12~23.5V | 34.5V | <70W | Adaptive | SOP8 |
