CXCH7606是一个180KHz的固定频率脉冲宽度调制（降压）DC/DC变换器，能高效、低功耗地驱动2.5A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。脉宽调制控制电路能够从0至100%。当短路保护功能，工作频率由180KHz降至48KHz。内部补偿块内置于最小化外部组件计数。
宽8V至36V输入电压范围
输出电压可从1.25伏调整到32伏
最大占空比100%
最小压降0.3V
固定180KHz开关频率
最大3A开关电流
内优化功率MOSFET
高效率
优良的线路和负载调节
带输出恒流回路
内置热关机功能
内置限流功能
内置输出短路保护功能
[ CXCH7606 ]
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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 CXCH7606 is a 180 KHz fixed frequency PWM buck (step-down)
DC/DC converter,capable of driving a 2.5A 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 PWM control circuit is able to adjust the duty ratio linearly from
0 to 100%. An over current protection function is built inside When
short protection function happens, the operation frequency will be reduced from 180KHz to 48KHz. An internal compensation block is built in to
minimize external component count.
二.产品特点(Features)
Wide 8V to 36V Input Voltage Range
Output Adjustable from 1.25V to 32V
Maximum Duty Cycle 100%
Minimum Drop Out 0.3V
Fixed 180KHz Switching Frequency
Maximum 3A Switching Current
Internal Optimize Power MOSFET
High efficiency
Excellent line and load regulation
With output constant current loop
Built in thermal shutdown function
Built in current limit function
Built in output short protection function
Available in SOP8L package
三,应用范围 (Applications)
Car Charger
Battery Charger
LCD Monitor and LCD TV
Portable instrument power supply
Telecom / Networking Equipment
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). Through an external resistor divider |
|
2 |
OCSET |
Output Constant Current Set Pin. |
|
3 |
VC |
Internal Voltage Regulator Bypass Capacity. In typical system |
|
4 |
VIN |
Supply Voltage Input Pin. CXCH7606 operates from a 8V to 36V |
|
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 40 |
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
|
自带恒压恒流环路的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 |
|
4.5V ~ 40V |
2A |
150KHz |
Adj (1.235V) |
0.155V |
SOP8L-EP |
|
|
4.5V ~ 40V |
3A |
150KHz |
Adj (1.235V) |
0.155V |
TO263-5L |
|
|
8V ~ 40V |
3A |
150KHz |
Adj (1.25V) |
0.11V |
SOP8L-EP |
|
|
8V ~ 40V |
3A |
180KHz |
Adj (1.25V) |
0.11V |
SOP8L-EP |
|
|
8V ~ 36V |
5A |
150KHz |
Adj (1.25V) |
0.11V |
TO263-5L |
|
|
8V ~ 36V |
3A |
180KHz |
Adj (1.25V) |
RCS设置 |
SOP8L |
|
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