L6382D5 STMicroelectronics

L6382D5 Power management unit for microcontrolled ballast Features Integrated high-voltage start-up 4 drivers for PFC, half-bridge & pre-heating MOSFETs Fully integrated power management for all SO-20 operating modes 5V microcontroller compatible Description Internal two point V regulator CC Over-current protection with digital output The L6382D5 is suitable for microcontrolled signal electronic ballasts embedding a PFC stage and a half-bridge stage. The L6382D5 includes 4 Cross-conduction protection (interlocking) MOSFET driving stages (for the PFC, for the half Under voltage lock-out bridge, for the preheating MOSFET) plus a power Integrated bootstrap diode management unit (PMU) featuring also a reference able to supply the microcontroller in any condition. Applications Besides increasing the application efficiency, the Dimmable / non-dimmable ballast L6382D5 reduces the bill of materials because different tasks (regarding drivers and power management) are performed by a single IC, which improves the application reliability. Figure 1. Block diagram March 2007 Rev 3 1/21 www.st.com 21Contents L6382D5 Contents 1 Device description 3 2 Pin settings 4 2.1 Pin connection 4 2.2 Pin description 4 3 Maximum ratings 6 3.1 Absolute maximum ratings . 6 3.2 Thermal data . 6 4 Electrical characteristics . 7 5 Application information . 11 5.1 Power management . 11 5.2 START-UP mode . 11 5.2.1 SAVE Mode 12 5.2.2 OPERATING Mode 12 5.2.3 Shut Down . 12 6 Block description 15 6.1 Supply section . 15 6.2 5V reference voltage 15 6.3 Drivers . 16 6.4 Internal logic, over current protection (OCP) and interlocking function 16 7 Package mechanical data 17 8 Order codes . 19 9 Revision history . 20 2/21