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MV1001SC Datasheet(PDF) 5 Page - Shindengen Electric Mfg.Co.Ltd |
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MV1001SC Datasheet(HTML) 5 Page - Shindengen Electric Mfg.Co.Ltd |
5 / 35 page ![]() MV1001SC 4 Gate Drive Level Shift Bandgap Vcc Vreg=5V(typ) OVP TSD ON Trigger Restart Timer Dimming Control Logic OFF Trigger UVLO Vcc LEB STOP Signal Vth_CS OVP S R Q UVLO Latch Signal Zero Current Detection JFET 1. Overview 1.1 Features The MV1001SC is an LED driver IC that can be operated through bus voltage direct. Omitting the auxiliary winding enables a single power supply configuration, and quasi-resonant operation in critical conduction mode raises efficiency and lowers noise. In general critical conduction mode, the switching frequency increases when the dimming ratio decreases. This increases switching losses and imposes limitations on the lowest dimming ratios, disadvantageously. When the dimming ratio decreases, the MV1001SC automatically switches from critical conduction mode to discontinuous conduction mode. This prevents the switching frequency increasing, reduces switching losses, and achieves smooth and deep dimming free of flickering. The MV1001SC has the following features: Allows quasi-resonant operation without auxiliary winding. Quasi-resonant operation in critical conduction mode helps achieve low input change, raises efficiency, and lowers noise. Off-time modulation enables deep dimming (1% or less). Allows PWM dimming input and linear dimming input. Compatible with Glow wall switch Allows LED open-circuit protection using auxiliary winding. Features built-in thermal shutdown, UVLO, and LED short-circuit protection. Can be operated through bus voltage direct. 1.2 Block diagram CAT.No.1A0102-1E |
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