CXCH7602是150KHz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3A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。PWM控制电路能够将占空比从0线性调整到100%。内置过电流保护功能。内部内置补偿块以最小化外部组件计数。
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[ CXCH7602 ]"
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 CXCH7602 is a 150KHz fixed frequency PWM buck (step-down)
DC/DC converter,capable of driving a 3A 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 includeinternal
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.An internal
compensation block is built in to minimize external component count.
二.产品特点(Features)
Wide 4.5V to 40V Input Voltage Range
Output Adjustable from 1.235V to 37V
Minimum Drop Out 1.5V
Fixed 150kHz Switching Frequency
3A Constant Output Current Capability
Internal Optimize Power Transistor
Excellent line and load regulation
With output constant current loop
Built in thermal shutdown function
Built in current limit function
Built in output over voltage protection
TO263-5L package
三,应用范围 (Applications)
Car Charger
Battery Charger
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 |
VIN |
Supply Voltage Input Pin. CXCH7602 operates from a 4.5V to 40V |
|
2 |
SW |
Power Switch Output Pin (SW). Output is the switch node that |
|
3 |
GND |
Ground Pin.(Note: Connected the back exposed PAD to Pin3.) |
|
4 |
FB |
Feedback Pin (FB). Through an external resistor divider |
|
5 |
CS |
Output Current Sense Pin; (Iload=0.155V/Rcs) |
六.电路原理图
七,功能概述
|
Parameter |
Symbol |
Value |
Unit |
|
Input Voltage |
Vin |
-0.3 to 45 |
V |
|
FB Pin Voltage |
VFB |
-0.3 to Vin |
V |
|
SW Pin Voltage |
VSW |
-0.3 to Vin |
V |
|
Power Dissipation |
PD |
Internally limited |
mW |
|
Thermal Resistance |
RJA |
30 |
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 |
|
