L6382D5 Datasheet, PDF (1/21 Pages) STMicroelectronics – 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
operating modes
■ 5V microcontroller compatible
■ Internal two point V_CC regulator
■ Over-current protection with digital output
signal
■ Cross-conduction protection (interlocking)
■ Under voltage lock-out
■ Integrated bootstrap diode
Applications
■ Dimmable / non-dimmable ballast
Figure 1. Block diagram
L6382D5
Power management unit
for microcontrolled ballast
SO-20
Description
The L6382D5 is suitable for microcontrolled
electronic ballasts embedding a PFC stage and a
half-bridge stage. The L6382D5 includes 4
MOSFET driving stages (for the PFC, for the half
bridge, for the preheating MOSFET) plus a power
management unit (PMU) featuring also a
reference able to supply the microcontroller in any
condition.
Besides increasing the application efficiency, the
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.
March 2007
Rev 3
1/21
www.st.com
21