GENERAL DESCRIPTION
ZCC2362 is a highly integrated current mode PWM control IC optimized for high
performance, low standby power and cost effective offline flyback converter
applications.
At full loading, the IC operates in fixed frequency(65KHz) mode. When the loading
goes low, it operates in Green mode with valley switching for high power conversion
efficiency. When the load is very small, the IC operates in ‘Extended Burst Mode’ to
minimize the standby power loss. As a result, high conversion efficiency can be
achieved in the whole loading range.
VCC low startup current and low operating current contribute to a reliable power on
startup and low standby design with ZCC2362.
ZCC2362 offers comprehensive protection coverage with auto-recovery including
Cycle-by-Cycle current limiting (OCP), over load protection(OLP), VCC under
voltage lockout (UVLO), over temperature protection (OTP), and over voltage
protection (OVP). Excellent EMI performance is achieved with YT proprietary
frequency shuffling technique.
The tone energy at below 23KHz is minimized in the design and audio noise is
eliminated during operation.
ZCC2362 is offered in SOT23-6 package
APPLICATIONS
Offline AC/DC flyback converter for
■General power supply
■Meet 75mW no load standby power standard
■Power Adapter
FEATURES
■Power on soft start reducing MOSFET Vdsstress
■Multi-Mode Operation 65KHz fix frequency mode @ Full Load Valley switching
operation @ Green mode Burst Mode @ Light Load & No Load
■Frequency shuffling for EMI
■Extended burst mode control for improved efficiency and low standby power
design
■Audio noise free operation
■Comprehensive protection coverage
VCC Under Voltage Lockout with hysteresis (UVLO)
VCC Over Voltage Protection (VCC OVP)
Cycle-by-cycle over current threshold setting for constant output power limiting
over universal input voltage range
Over Load Protection (OLP) with auto-recovery
External (if NTC resistor is connected at PRT pin)or internal Over Temperature
Protection (OTP) with auto-recovery
Output Over Voltage Protection(Output OVP) with auto-recovery, and the OVP
triggered voltage can be adjusted by the resistor connected between auxiliary
winding and PRT pin
Output diode short protection with auto-recovery
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