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
â Universal mains supply operation (70 V to 276 V AC)
â High level of integration resulting in a very low external component count
â Fixed frequency Continuous Conduction Mode (CCM) operation capability
â Quasi-Resonant (QR) Discontinuous Conduction Mode (DCM) operation capability
2.2 Green features
â Valley or zero voltage switching for minimum switching losses in QR operation
â Cycle skipping mode at very low loads; input power < 300 mW at no-load operation for a typical adapter application
â On-chip start-up current source
2.3 Protection features
â Safe restart mode for system fault conditions
â Zero current switch-on in QR mode
â Undervoltage protection (fold back during overload)
â IC OverTemperature Protection (OTP) (latched)
â Low and adjustable OverCurrent Protection (OCP) trip level
â Soft (re)start
â Mains voltage-dependent operation-enabling level
â TEA1532CT: 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
â TEA1532BT: general purpose input for latched protection and timing, e.g. to be used for OVP, output short-circuit protection or system OTP
â Brown-out protection
3. Applications
â 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.
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