Cxac8556 is a current mode quasi resonant PWM controller with built-in 650V / 2A power MOSFET. The output power of up to 15W and peak output power of up to 18W can be provided in a wide voltage range of 85-265V, which ensures the valley bottom voltage continuity under a wide range of load and input voltage changes.
Cxac8556 adopts high-voltage start-up design. The chip is directly connected to high voltage to provide the current needed for chip start-up, and is turned off after start-up to reduce standby power consumption. In addition, it enters cycle adjustment mode when it is light load and burst mode when it is light load, so as to realize standby air consumption less than 100MW when it is fully input voltage, and minimize the range of audio area below 20kHz To ensure no abnormal sound in normal working condition. The 7.5us timer inside the chip limits the switch to less than 120kHz, which can effectively simplify the design of EML
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[ CXAC8556 ]"
目录
产品概述 返回TOP
CXAC8556是一个电流模式准谐振PWM控制器，内置650V/2A功率MOSFET。在85-265V的宽电压范围内提供高达15W的输出功率，峰值输出功率更可高达18W，在大范围的负载和输入电压变化情况下确保谷底电压导通。
CXAC8556采用高压启动设计，芯片直接连接到高压，以提供芯片启动所需要电流，并在启动后关闭，以降低待机功耗；另外在轻载时进入调周期模式，在更轻载时进入突发模式，从而实现了在全输入电压时小于100mW的待机空耗，并且使进入20KHz以下的音频区的范围最小化，以保证在正常工作状态无异音。芯片内部的7.5uS计时器限制了开关小于120KHz，可以有效简化EML设计。CXAC8556拥有完善的保护功能，包括过流保护、过载保护、欠压锁定、过压保护、过温保护等，以确保系统可靠的工作
产品特点 返回TOP
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产品种类 |
AC/DC转换器 |
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产品特性 |
电流模式准谐振PWM控制器 |
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备用电源 |
<100mW |
|
功率(80-265V) |
18W |
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脉宽模式 |
PWM |
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频率 |
ADJ 50-120 KHz |
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精准性 |
±1% |
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封装 |
DIP7 |
应用范围 返回TOP
• 适配器
• 机顶盒
• 开放式开关电源
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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Small& Medium Power Controller (中小功率控制芯片) |
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Part Number |
Power |
Power |
Standby |
MODE |
Freq |
Accu |
OTP/ |
Package |
|
(80-265V) |
(175-265V) |
(mW) |
(Flyback) |
(KHz) |
OVP |
|||
|
10W |
12W |
≤300 |
PFM |
65 |
±1% |
-/ Y |
TO92 |
|
|
15W |
18W |
≤200 |
PWM |
45-80 ADJ |
±1% |
Y/ Y |
DIP8 |
|
|
15W |
18W |
≤150 |
PWM |
45-80 ADJ |
±1% |
-/ Y |
DIP8 |
|
|
12W |
18W |
≤150 |
PWM |
45-80/ADJ |
±1% |
Y/ Y |
DIP8 |
|
|
5W |
7W |
≤150 |
PWM |
45-80/ADJ |
±5% |
Y/ Y |
SOP8/ESOP8 |
|
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
-/ Y |
DIP8 |
|
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
-/ Y |
DIP8 |
|
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
-/ Y |
DIP8 |
|
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
Y/ Y |
DIP8 |
|
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
Y/ Y |
DIP8 |
|
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
Y/ Y |
DIP8 |
|
|
18W |
24W |
≤100 |
PWM |
65 |
±1% |
Y/ Y |
DIP8 |
|
|
12W |
18W |
≤100 |
PWM |
60 |
±1% |
Y/ Y |
DIP8 |
|
|
12W |
18W |
≤100 |
PWM |
60 |
±1% |
Y/ Y |
DIP8 |
|
|
18W |
24W |
≤100 |
PWM |
65 |
±1% |
Y/ Y |
DIP8 |
|
|
15W |
18W |
≤100 |
QR |
90 |
±1% |
Y/ Y |
DIP7 |
|
|
12W |
18W |
≤100 |
PWM |
60 |
±1% |
Y/ Y |
DIP8 |
|
