CXCH7608是150 KHz固定频率的脉冲宽度调制（降压）DC/DC变换器，能高效、低功耗地驱动2.1A负载纹波和良好的线路和负载调节。要求最小数量对于外部组件，调节器使用简单，包括内部组件频率补偿和固定频率振荡器。CXCH7608内置输出短路保护功能。当短的时候
保护功能发生时，芯片将被关闭。内线内置补偿块以最小化外部组件计数
宽8V至45V输入电压范围。
固定5V输出电压。
最大2.1A输出电流。
固定150KHz开关频率。
内部优化功率MOSFET。
效率高达92%。
内置输出短关机功能。
良好的线路和负载调节。
内置热关机功能。
内置电流限制功能
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[ CXCH7608 ]"
目录
1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（产品PDF文档）
5.产品封装图 6.电路原理图 7.功能概述 8.相关产品
一,产品概述(General Description) 
The CXCH7608 is a 150 KHz fixed frequency PWM buck (step-down)
DC/DC converter,capable of driving a 2.1A load with high efficiency, low
ripple and excellent line and load regulation. Requiring a minimum number
of external components, the regulator is simple to use and include internal
frequency compensation and a fixed-frequency oscillator.
The CXCH7608 built in output short protection function. When short
protection function happens, the chip will be shutdown. An internal
compensation block is built in to minimize external component count.
二.产品特点(Features)
Wide 8V to 45V input voltage range.
Fixed 5V output voltage.
Maximum 2.1A output current.
Fixed 150KHz switching frequency.
Internal optimize power MOSFET.
High efficiency up to 92%.
Built in output short shutdown function.
Excellent line and load regulation.
Built in thermal shutdown function.
Built in current limit function.
Available in SOP8L package.
三,应用范围 (Applications)
Car Charger.
Battery Charger.
USB Power Supply.
四.技术规格书下载（产品PDF）
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！
五,产品封装图 (Package)
|
Pin Number |
Pin Name |
Description |
|
1 |
FB |
Feedback Pin (FB). The feedback threshold voltage is 5V. |
|
2 |
NC |
No Connected. |
|
3 |
VC |
Internal Voltage Regulator Bypass Capacity. In typical system |
|
4 |
VIN |
Supply Voltage Input Pin. CXCH7608 operates from 8V to 45V |
|
5,6 |
SW |
Power Switch Output Pin (SW). SW is the switch node that |
|
7,8 |
GND |
Ground Pin. Care must be taken in layout. This pin should be |
六.电路原理图
七,功能概述
|
Parameter |
Symbol |
Value |
Unit |
|
Input Voltage |
Vin |
-0.3 to 50 |
V |
|
Feedback Pin Voltage |
VFB |
-0.3 to Vin |
V |
|
Output Switch Pin Voltage |
VOutput |
-0.3 to Vin |
V |
|
Power Dissipation |
PD |
Internally limited |
mW |
|
Thermal Resistance (SOP8L) |
RJA |
100 |
oC/W |
|
Operating Junction Temperature |
TJ |
-40 to 125 |
oC |
|
Storage Temperature |
TSTG |
-65 to 150 |
oC |
|
Lead Temperature (Soldering, 10 sec) |
TLEAD |
260 |
oC |
|
ESD (HBM) |
>2000 |
V |
八,相关芯片选择指南
|
自带恒压限流环路的高效率降压型单片车充专用芯片 |
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|
产品型号 |
输入电压 |
开关电流 |
开关频率 |
恒压设置 |
恒流设置 |
封装类型 |
|
8V ~ 45V |
1.8A |
150KHz |
固定5V |
最大1.8A |
SOP8L |
|
|
8V ~ 45V |
2.1A |
150KHz |
固定5V |
最大2.1A |
SOP8L |
|
|
8V ~ 40V |
2.4A |
150KHz |
固定5V |
最大2.4A |
SOP8L |
|
|
8V ~ 40V |
3.2A |
150KHz |
固定5V |
最大3.2A |
TO252-5L |
|
