OB2301ZCPA昂宝规格书

©On-Bright Electronics Confidential Preliminary Datasheet

OB_DOC_DS_2301Z01

1 OB2301Z

OB2301ZCPA昂宝规格书

High Performance synchronous rectifier GENERAL DESCRIPTION OB2301Z is a high performance and tightly integrated secondary side synchronous rectifier for switch mode power supply system. It combines a much lower voltage drop N-channel MOSFET to emulate the traditional diode rectifier at the

secondary side of Flyback converter, which can

reduce heat dissipation, increases output current capability and efficiency, and simplify thermal

design. OB2301Z can support low system output

voltage down to 2V at constant current mode.

It is suitable for multiple mode applications including discontinuous conduction mode and quasi-resonant mode. With its versatility and

optimization, OB2301Z can be used in various switch mode power supply topologies including secondary-side control topology and primary-side

control topology.

From the information on the secondary side of the

isolation transformer, OB2301Z generates a

driving signal with dead time with respect to the primary side PWM signal to turn the integrated N-

channel SR switch on and off in proximity of the

zero current transition with the help of smart driver

voltage control. It is optimized for 5V output voltage. In primary-side control topology, OB2301Z can detect the output voltage and feed back a series of warning pulses to primary side controller when the output voltage is lower than an inner-determined threshold to awaken the primary-

side power switch to improve dynamic response.

The externally adjustable minimum on time and

property off time control scheme effectively avoid

the ring impact induced by parasitic elements so

that a reliable and noise free operation of the SR

system is insured.

OB2301Z is offered in SOP8 package. FEATURES ■ Secondary-side synchronous rectifier optimized for 5V output system ■ Suitable for DCM, QR operation

■ Accurate secondary side MOSFET Vds

sensing ■ Low cost small size CC/CV mode support ■ Up to 200kHz operation frequency

■ 3A/2A peak current sink/source driver capability ■ Output voltage over-shoot and under-shoot control ■ Enhanced dynamic response with firing

warning pulses scheme ■ VDD UVLO protection APPLICATIONS

■ AC/DC 5V adaptors ■ Cell phone charger ■ 5V Bias supply ■ Low voltage rectification circuits

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

OB2301ZCPA昂宝规格书

TYPICAL APPLICATION

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