The CXSD6276 CXSD6276A is a fixed 300kHz frequency, voltage mode, and
synchronous PWM controller. The device drives two low cost N-channel
MOSFETs and is de-signed to work with single 5~12V or two supply
voltage(s), providing excellent regulation for load transients.
The CXSD6276 CXSD6276A integrates controls, monitoring, and protection functions
into a single 8-pin package to provide a low cost and perfect power solution.
A power-on-reset (POR) circuit monitors the VCC supply voltage to prevent
wrong logic controls. An internal 0.8V reference provides low output voltage
down to 0.8V for further applications. An built-in digital soft-start with fixed
soft-start interval prevents the output voltage from overshoot as well as limits
the input current. The controller’s over-current protection monitors the output
current by using the voltage drop across the low-side MOSFET’s RDS(ON),
eliminating the need of a current sensing resistor. Additional under voltage and
over voltage protections monitor the voltage on FB pin for short-circuit and
over-voltage protections. The over-current protection cycles the soft-start
function until 4 over-current events are counted.Pulling and holding the voltage
on OCSET pin below 0.15V with an open drain device shuts down the controller.
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目录
1.产品概述 2.产品特点
3.应用范围 4.下载产品资料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 CXSD6276 CXSD6276A is a fixed 300kHz frequency, voltage mode, and
synchronous PWM controller. The device drives two low cost N-channel
MOSFETs and is de-signed to work with single 5~12V or two supply
voltage(s), providing excellent regulation for load transients.
The CXSD6276 CXSD6276A integrates controls, monitoring, and protection functions
into a single 8-pin package to provide a low cost and perfect power solution.
A power-on-reset (POR) circuit monitors the VCC supply voltage to prevent
wrong logic controls. An internal 0.8V reference provides low output voltage
down to 0.8V for further applications. An built-in digital soft-start with fixed
soft-start interval prevents the output voltage from overshoot as well as limits
the input current. The controller’s over-current protection monitors the output
current by using the voltage drop across the low-side MOSFET’s RDS(ON),
eliminating the need of a current sensing resistor. Additional under voltage and
over voltage protections monitor the voltage on FB pin for short-circuit and
over-voltage protections. The over-current protection cycles the soft-start
function until 4 over-current events are counted.Pulling and holding the voltage
on OCSET pin below 0.15V with an open drain device shuts down the controller.
二.产品特点(Features)
1.)Operating with Single 5~12V Supply Voltage
2.)or Two Supply Voltages
3.)Drive Dual Low Cost N-Channel MOSFETs
Adaptive Shoot-Through Protection
4.)Built-in Feedback Compensation
Voltage-Mode PWM Control
0~100% Duty Ratio
Fast Transient Response
5.)±2% 0.8V Reference
Over Line, Load Regulation, and Operating
6.)Temperature Programmable Over-Current Protection
Using RDS(ON) of Low-Side MOSFET
7.)Hiccup-Mode Under-Voltage Protection
8.)118% Over-Voltage Protection
9.)Adjustable Output Voltage
10.)Small Converter Size
300kHz Constant Switching Frequency
Small SOP-8 Package
11.)Built-In Digital Soft-Start
12.)Shutdown Control Using an External MOSFET
13.)Lead Free and Green Devices Available
三,应用范围 (Applications)
Motherboard
Graphics Card
High Current, up to 20A, DC-DC Converters
四.下载产品资料PDF文档
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)
|
BOOT (Pin 1) This pin provides ground referenced bias voltage to the high-side MOSFET driver. A bootstrap circuit with a diode connected to 5~12V is used to create a voltage suitable to drive a logic-level N-channel MOSFET. |
八,相关产品 更多同类产品......
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Switching Regulator > Buck Controller |
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|
Part_No |
Package |
Archi tectu |
Phase |
No.of PWM Output |
Output Current (A) |
Input Voltage (V) |
Reference Voltage (V) |
Bias Voltage (V) |
Quiescent Current (uA) |
|
|
min |
max |
|||||||||
|
SOP-14 QSOP-16 QFN4x4-16 |
VM |
1 |
1 |
30 |
2.9 |
13.2 |
0.9 |
12 |
8000 |
|
|
SOP-8 |
VM |
1 |
1 |
20 |
2.9 |
13.2 |
0.8 |
12 |
5000 |
|
|
SOP-8 |
VM |
1 |
1 |
20 |
2.9 |
13.2 |
0.8 |
12 |
5000 |
|
|
QFN4x4-24 |
VM |
2 |
1 |
60 |
3.1 |
13.2 |
0.6 |
12 |
5000 |
|
|
SOP-8 |
VM |
1 |
1 |
20 |
2.2 |
13.2 |
0.8 |
5~12 |
2100 |
|
|
SOP-8 |
VM |
1 |
1 |
20 |
2.2 |
13.2 |
0.8 |
5~12 |
2100 |
|
|
SOP8|TSSOP8 |
VM |
1 |
1 |
5 |
5 |
13.2 |
1.25|0.8 |
5~12 |
3000 |
|
|
SOP-8 |
VM |
1 |
1 |
10 |
3.3 |
5.5 |
0.8 |
5 |
2100 |
|
|
SOP-14 |
VM |
1 |
1 |
10 |
5 |
13.2 |
0.8 |
12 |
2000 |
|
|
TSSOP-24 |QFN5x5-32 |
VM |
1 |
2 |
20 |
5 |
13.2 |
0.6 |
5~12 |
4000 |
|
|
SOP14 QSOP16 QFN-16 |
VM |
1 |
1 |
30 |
2.9 |
13.2 |
0.9 |
12 |
4000 |
|
|
SOP-14 |
VM |
1 |
1 |
30 |
2.2 |
13.2 |
0.6 |
12 |
5000 |
|
|
SOP-14 |
VM |
1 |
1 |
30 |
2.2 |
13.2 |
0.6 |
12 |
5000 |
|
|
SOP-14 |
VM |
1 |
1 |
25 |
2.2 |
13.2 |
0.8 |
12 |
5000 |
|
|
LQFP7x7 48 TQFN7x7-48 |
VM |
1 |
6 |
0.015 |
1.4 |
6.5 |
- |
5 |
1800 |
|
|
TSSOP-24P |
VM |
1 |
2 |
20 |
2.97 |
5.5 |
0.8 |
5~12 |
5000 |
|
|
SOP-14 |
VM |
1 |
1 |
10 |
5 |
13.2 |
0.8 |
12 |
3000 |
|
|
SOP-8-P|DIP-8 |
VM |
1 |
1 |
30 |
2.9 |
13.2 |
1.2 |
12 |
3000 |
|
|
SSOP28 QFN4x4-24 |
VM |
1 |
2 |
20 |
5 |
24 |
0.9 |
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