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L6382D Dataheets PDF



Part Number L6382D
Manufacturers ST Microelectronics
Logo ST Microelectronics
Description Power management unit
Datasheet L6382D DatasheetL6382D Datasheet (PDF)

L6382D Power management unit for LED drivers Datasheet - production data Applications  Dimmable / non-dimmable LED drivers SO-20 Description Features  Integrated high voltage startup  4 drivers for PFC, half-bridge and auxiliary MOSFETs  3.3 V microcontroller compatible  Fully integrate power management for all operating modes  Internal two point VCC regulator  Overcurrent protection with digital output signal  Cross conduction protection (interlocking)  Undervoltage lockout  Int.

  L6382D   L6382D


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L6382D Power management unit for LED drivers Datasheet - production data Applications  Dimmable / non-dimmable LED drivers SO-20 Description Features  Integrated high voltage startup  4 drivers for PFC, half-bridge and auxiliary MOSFETs  3.3 V microcontroller compatible  Fully integrate power management for all operating modes  Internal two point VCC regulator  Overcurrent protection with digital output signal  Cross conduction protection (interlocking)  Undervoltage lockout  Integrated bootstrap diode The L6382D device is suitable for LED drivers embedding a PFC stage and a half-bridge stage. The L6382D includes 4 MOSFET driving stages (for the PFC, for the half-bridge, and for the auxiliary MOSFET) plus a power management unit (PMU) featuring also a reference able to supply the microcontroller in any condition. In addition to increasing application efficiency, the L6382D device reduces the bill of materials as different tasks (regarding drivers and power management) are performed by a single IC, which improves application reliability. Figure 1. Block diagram September 2014 This is information on a product in full production. DocID10972 Rev 8 1/21 www.st.com Contents Contents L6382D 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 Typical electrical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.1 Power management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.2 Startup mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.2.1 Save mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.2.2 Operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.2.3 Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 Block description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.1 Supply section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.2 3.3 V reference voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.3 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7.4 Internal logic, overcurrent protection (OCP) and interlocking function . . . 17 8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 9 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2/21 DocID10972 Rev 8 L6382D 1 Device description Device description Designed in high voltage BCD off-line technology, the L6382D is a PFC and a half-bridge stage LED drivers controller equipped with 4 input pins and a high voltage startup generator conceived for applications managed by a microcontroller, providing maximum flexibility. It allows the designer to use the same LED drivers circuit for different lamp wattages/types simply by changing the mC software. The digital input pins - capable of receiving signals up to 400 KHz - are connected to level shifters that provide the control signals to their relevant drivers. In particular, the L6382D embeds one driver for the PFC pre-regulator stage, two drivers for the LED drivers halfbridge stage (high voltage, and also including the bootstrap function) and the last one to provide supplementary features. A precise reference voltage (+3.3 V ± 1%) able to provide up to 30 mA is available to supply the mC: this current is obtained thanks to the on-chip high voltage startup generator which, moreover, keeps the consumption before startup below 150 A. The chip was designed with advanced power management logic to minimize power losses and increase application re.


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