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General description

The GreenChip III+ is the third generation of green Switched Mode Power Supply (SMPS) controller ICs. The SSL4101T combines a controller for Power Factor Correction (PFC) and a flyback controller. Its high level of integration allows the design of a cost-effective LED lighting application power supply with a very low number of external components.

Features and benefits

Distinctive features

■ Integrated PFC and flyback controller.

■ True universal mains supply operation: 70 V (AC) to 305 V (AC).

■ High level of integration, resulting in a very low external component count and a cost-effective design.

Green features

■ On-chip start-up current source.

PFC green features

■ Valley/zero voltage switching for minimum switching losses (NXP Semiconductors patented).

■ Frequency limitation to reduce switching losses.

■ PFC is switched off when a low load is detected at the flyback output.

Flyback green features

■ Valley switching for minimum switching losses (NXP Semiconductors patented).

■ Frequency reduction with fixed minimum peak current at low power operation to maintain high efficiency at low output power levels.

Protection features

■ Safe restart mode for system fault conditions.

■ Continuous mode protection by means of demagnetization detection for both converters (NXP Semiconductors patented).

■ UnderVoltage Protection (UVP) (foldback during overload).

■ Accurate OverVoltage Protection (OVP) for both converters (adjustable for flyback converter).

■ Open control loop protection for both converters. The open loop protection on the flyback converter is safe restart.

■ IC OverTemperature Protection (OTP).

■ Low and adjustable OverCurrent Protection (OCP) trip level for both converters.

■ General purpose input for latched protection, e.g. to be used for system OverTemperature Protection (OTP).

■ The device can be used in all LED lighting applications that require a very efficient, low THD, high PF, true universal input voltage and cost-effective power supply solution between 10 W and 300 W.