CHIP-RAIL CR300X-CR3005,CR3006,CR3007,Simple Structure Synchronous Rectifier Switch
CHIP-RAIL CR300X-CR3005,CR3006,CR3007FEATURES
Synchronous Rectification for
DCM&QRM Operation Flyback
Synchronous Rectification for 5V
output system
Operating frequency up to 200kHz
Fast detector of transformer secondary
voltage waveform
Low Standby Power to meet DOE Lot
6 requirement
Simplify system design
SOP-8L green Packaging
Internal SR MOSFET
Simple structure with little external
component
CHIP-RAIL CR300X-CR3005,CR3006,CR3007APPLICATIONS
Switching AC/DC Small Power Adaptor
Cell Phone Charger
Low voltage rectification circuits
CHIP-RAIL CR300X-CR3005,CR3006,CR3007GENERAL DESCRIPTION
CR300X is a simple structure Synchronous Rectifier Switch for 5V output system such as
power AC/DC charger and adapter applications. A low voltage drop N-channel MOSFET is
integrated into CR300X to emulate the traditional diode rectifier at the secondary side of flyback
converter, which can improve the power delivery efficiency and reduce heat dissipation effectively.
Its high integration allows the design of a cost-effective power supply with a very low number of
external components. CR300X is designed to be suitable for converters working in discontinuous
conduction mode (DCM) and quasi-resonant mode (QRM). Considering its versatility and
optimization, CR300X can be used in various switch mode power supply topologies including
secondary-side control topology.
By detecting the variation of the voltage across the secondary-side of the isolation
transformer, CR300X generates a driving signal with respect to the primary side PWM signal to
turn the integrated N-channel MOSFET on and off in proximity of the zero current transition.
Furthermore, the minimum on time and property off time control scheme can effectively avoid the
ring impact induced by parasitic elements so that a reliable and noise free operation of the SR
system is ensured.
|
Product |
Recommended Output |
|
CR3005 |
5V/3.4A |
|
CR3006 |
5V/3.1A |
|
CR3007 |
5V/2.4A |
Notes: Maximum practical continuous power in an open frame design with sufficient DRAIN pattern as a heat sink,
