CX7501 Switch Datasheet

CX7501 Datasheet, PDF, Equivalent


Part Number

CX7501

Description

Quasi-Resonant PSR CC/CV PWM Power Switch

Manufacture

CXW

Total Page 10 Pages
Datasheet
Download CX7501 Datasheet


CX7501
CX7501
Quasi-Resonant PSR CC/CV PWM Power Switch
FEATURES
Low Cost Solution Built-in 800V power BJT
Quasi-Resonant Primary Side Regulation
(QR-PSR) Control with High Efficiency
Multi-Mode PSR Control
Fast Dynamic Response
Built-in Dynamic Base Drive
Audio Noise Free Operation
±4% CC and CV Regulation
Low Standby Power <70mW
Programmable Cable Drop Compensation
(CDC) in CV Mode
Built-in AC Line & Load CC Compensation
Build in Protections:
Short Load Protection (SLP)
Cycle-by-Cycle Current Limiting
Leading Edge Blanking (LEB)
Pin Floating Protection
VDD OVP & UVP & Clamp
Over temperature protection(OTP)
Available with CX7501 Versions in SOP-7
Package
APPLICATIONS
Battery Chargers for Cellular Phones
AC/DC Power Adapter and LED Lightings
GENERAL DESCRIPTION
CX7501 is a high performance Quasi Resonant
(QR) Primary Side Regulation (PSR) PWM power
switch with high precision CV/CC control ideal for
charger applications.
In CV mode, CX7501 adopts Multi Mode QR
Control which uses the hybrid of AM (Amplitude
Modulation) mode and (Frequency Modulation)
FM mode to improve system efficiency and
reliability. In CC mode, the IC uses PFM control
with line and load CC compensation. The IC can
achieve fast dynamic response. The built-in Cable
Drop Compensation (CDC) function can provide
excellent CV performance.
CX7501 integrates functions and protections of
Under Voltage Lockout (UVLO), VDD over Voltage
Protection (VDD OVP), Cycle-by-cycle Current
Limiting (OCP), Short Load Protection (SLP), On-
Chip Thermal Shutdown, VDD Clamping, etc.
TYPICAL APPLICATION CIRCUIT
SHENZHEN CHENGXINGWEI TECHNOLOGY CO.LTD
CX7501
1

CX7501
Pin Configuration
CX7501
Quasi-Resonant PSR CC/CV PWM Power Switch
Pin Description
Pin
Number
Pin
Name
1 FB
2 CS
3 VDD
4E
5,6 HV
7 GND
Block Diagram
I/O Description
System feedback pin which regulates both the output voltage in CV
I mode and output current in CC mode based on the flyback voltage of
the auxiliary winding.
I Current Sense Input Pin.
P Power Supply Pin of the Chip.
O The Power BJT Emitter
O The Power BJT Collector
P The Ground of the IC
SHENZHEN CHENGXINGWEI TECHNOLOGY CO.LTD
2


Features CX7501 Quasi-Resonant PSR CC/CV PWM Powe r Switch FEATURES  Low Cost Solutio n Built-in 800V power BJT  Quasi-Res onant Primary Side Regulation (QR-PSR) Control with High Efficiency  Multi- Mode PSR Control  Fast Dynamic Respo nse  Built-in Dynamic Base Drive  Audio Noise Free Operation  ±4% CC and CV Regulation  Low Standby Powe r <70mW  Programmable Cable Drop Com pensation (CDC) in CV Mode  Built-in AC Line & Load CC Compensation  Bui ld in Protections:  Short Load Prote ction (SLP)  Cycle-by-Cycle Current Limiting  Leading Edge Blanking (LEB )  Pin Floating Protection  VDD O VP & UVP & Clamp  Over temperature p rotection(OTP)  Available with CX750 1 Versions in SOP-7 Package APPLICATION S  Battery Chargers for Cellular Pho nes  AC/DC Power Adapter and LED Lig htings GENERAL DESCRIPTION CX7501 is a high performance Quasi Resonant (QR) P rimary Side Regulation (PSR) PWM power switch with high precision CV/CC control ideal for charger applications. In CV mode, CX7501 adopts Multi.
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