的GreenChip II SMPS控制IC GreenChip II SMPS control IC
General description
The GreenChip II is the second generation of controller ICs intended for green flyback Switched Mode Power Supplies SMPS. Its high level of integration allows the design of a cost effective power supply with a very low number of external components.
Features
2.1 Distinctive features
■ Universal mains supply operation 70 V to 276 V AC
■ High level of integration resulting in a very low external component count
■ Fixed frequency Continuous Conduction Mode CCM operation capability
■ Quasi-Resonant QR Discontinuous Conduction Mode DCM operation capability
2.2 Green features
■ Valley or zero voltage switching for minimum switching losses in QR operation
■ Cycle skipping mode at very low loads; input power < 300 mW at no-load operation for a typical adapter application
■ On-chip start-up current source
2.3 Protection features
■ Safe restart mode for system fault conditions
■ Zero current switch-on in QR mode
■ Undervoltage protection fold back during overload
■ IC OverTemperature Protection OTP latched
■ Low and adjustable OverCurrent Protection OCP trip level
■ Soft restart
■ Mains voltage-dependent operation-enabling level
■ : general purpose input for latched or safe restart protection and timing, e.g. to be used for OverVoltage Protection OVP, output short-circuit protection or system OTP
■ TEA1532BT: general purpose input for latched protection and timing, e.g. to be used for OVP, output short-circuit protection or system OTP
■ Brown-out protection
3\. Applications
■ Adapters and open frame flyback power supplies. The device can also be used in all applications that demand an efficient and cost-effective solution up to 250 W.