The latest release of the core is compatible with the thyristor dimming MT7887 peak efficiency 93% PF>0.8

The Mickey MT7887 is a high-precision LED constant current control chip that operates in zero-current conduction and peak current turn-off (CRM, CriTIcal ConducTIon Mode), and is mainly used in non-isolated LED power systems. The MT7887 supports high power factor applications with PFs above 0.8. The critical conduction mode ensures that the MT7887 can control the power switch to turn on when the inductor current is zero, reducing the switching loss of the power tube and ensuring that the system has a peak efficiency of more than 93%. The critical conduction mode with zero inductor current valley combined with the peak inductor current compensated by the input bus voltage ensures high accuracy of the output LED current with good linearity and load regulation. It is not sensitive to changes in inductance and can use I-shaped inductors. The chip has a built-in 500V high-voltage power MOS tube, and the peripheral circuit is simple and the system cost is low. The MT7887 also implements various protection functions including Cycle-by-Cycle Overcurrent Protection (OCP), LED Short Circuit Protection (SCP), LED Adjustable Open Circuit Protection (OVP), and Over Temperature Protection (OTP) to ensure reliable system operation. The MT7887 is an LED driver that supports TRIAC dimming. It has wide compatibility, dimming depth less than 1%, dimming curve to meet NEMASSL6 standard, and low THD.

main feature

Peak efficiency of up to 93%;

Support high PF applications, PF reaches 0.8 or above;

Wide range of dimming compatibility;

The dimming depth can be less than 1%;

The dimming curve is in compliance with the NEMASSL6 standard;

Built-in 500V power MOS tube;

High precision LED constant current;

Cycle-by-cycle peak current control;

LED short circuit protection;

LED adjustable open circuit protection;

Leading edge blanking control;

Undervoltage lockout protection (UVLO);

Over temperature protection;

SOP8 package;

application

LED bulbs, fluorescent lamps, signal lights, landscape lights, etc.;

LED stage lights, candle lights, corn lights, etc.;

Other LED driver applications and universal constant current sources;

Typical application schematic

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