咨询热线：0769-8991 7065
咨询热线：0769-8991 7065
准谐振模式控制芯片系列
Product Number | Oper. Mode | Max Clamp Frequency | Max Vdd | Max Ton/ Toff | PFC Control | VDD OVP | Power on Soft-start | OCP Compen-sation | OLP/ SCP | Brown-out | OTP | Output OVP | External Latch |
OB2201/T | CCM&QR | 90kHz | 28V | Y | -- | Y | 4ms | Y | A | -- | A | A | Y |
OB2202 | QR | 130kHz | 28V | Y | -- | Y | External | Y | A | Y | Built-in | A | Y |
OB2203 | QR | 130kHz | 28V | Y | Y | Y | External | Y | A | -- | Built-in | A | Y |
L:Latch; A:Auto-recovery
OB2201/T
Quasi Resonant PWM Controller
OB2201 is a QR PWM Controller dedicated for 20W~65W power range offline applications. Reduced switching loss and improved EMI
performance are achieved through QR control. The optimized loading/ frequency adaptive design will benefit average efficiency and
help to meet EPS2.0 requirement.
Features:
◆ Up to 90% full load efficiency
◆ Programmable soft start
◆ High precision output OVP
◆ IC VDD OVP
◆ Multi-mode QR control
◆ Optimized over power protection (OPP)
◆ Upper frequency clamp at 90KHz
◆ QR mode 52kHz lower frequency clamping
◆ 600mA gate drive capability
◆ Built-in over temperature protection
◆ Selectable built-in Latch shutdown for strong system reliability
◆ Available in DIP8 and SOP8 packages,RoHS compliant
Applications:
◆ EPC Adapter
◆ DLP Projector/RPD Power
◆ DVD/STB Player Power
◆ Home Appliance Power
Typical Application:
OB2202
Quasi Resonant PWM Controller
OB2202 is a QR PWM Controller designed for offline applications. Reduced switching loss and improved EMI performance
are achieved through Quasi Resonance control. OB2202 can achieve greater than 90% full-load efficiency and high reliability with its perfect protection function.
Features:
◆ Up to 90% full load efficiency
◆ Built-in high precision brown out/recovery module
◆ Programmable soft start
◆ Input over voltage protection (Line OVP)
◆ High precision output OVP
◆ Multi-mode QR control
◆ 1A gate drive capability
◆ IC VDD OVP
◆ Optimized over power protection (OPP)
◆ Upper frequency clamp at 130KHz
◆ Built-in over temperature protection
◆ Selectable built-in latch shutdown for strong system reliability
◆ Available in DIP8 and SOP8 packages,RoHS compliant
Applications:
◆ Notebook Adapter
◆ CRT/LCD/PDP TV Power
◆ DLP Projector/RPD Power
◆ DVD Player Power
◆ Home Appliance Power
Typical Application:
OB2203
Quasi Resonant PWM Controller
OB2203 is a highly integrated Quasi-Resonant controller optimized for high performance offline flyback converter applications.
Reduced switching loss and improved EMI performance is achieved through Quasi Resonance control. A built-in Pchannel MOSFET and its control are integrated to automatically turn on/off PFC stage according to the load conditions.
Features:
◆ PFC power supply control function integrated for PFC shutdown at no load and light load condition
◆ Programmable soft start
◆ Programmable load OVP
◆ Multi-Mode quasi resonance control for efficiency improvement and EMI optimize
◆ 1A gate drive capability
◆ Built-in slope compensation for better stability at low/high power design
◆ Upper frequency clamp at 130Khz for better EMI
◆ Selectable built-in latch shutdown for strong system reliability
◆ Available in DIP8 and SOP8 packages,RoHS compliant
Applications:
◆ Notebook Adapter
◆ CRT/LCD/PDP TV Power
◆ DLP Projector/RPD Power
◆ Home Appliance Power
Typical Application:
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