L6382D(2005) データシートの表示（PDF） - STMicroelectronics
部品番号
コンポーネント説明
一致するリスト
L6382D Datasheet PDF : 14 Pages
| |||
L6382D
filament heating when they are supplied by independent winding.
■ Bootstrap Circuit: it generates the supply voltage for the high side Driver (HSD). This circuit sources
current from Vcc to PIN HSB when LSG in ON. A patented integrated bootstrap section replaces an
external bootstrap diode. This section together with a bootstrap capacitor provides the bootstrap voltage
to drive the high side power MOSFET. This function is achieved using a high voltage DMOS driver
which is driven synchronously with the low side external power MOSFET. For a safe operation, current
flow between BOOT pin and Vcc is always inhibited, even though ZVS operation may not be ensured.
5.4 INTERNAL LOGIC, OVER CURRENT PROTECTION (OCP) AND INTERLOCKING FUNCTION.
The DIM (Digital Input Monitor) block manages the input signals delivered to the drivers ensuring that they
are low during the described start-up procedure; the DIM block controls the L6382D behaviour during both
save and operating modes.
When the voltage on pin CSI overcomes the internal reference of 0.5V (typ.) the block latches the fault
condition: in this state the OCP block forces low both HSD and LSD signals while CSO will be forced high.
This condition remains latched until LSI and HSI are simultaneously low and CSI is below 0.5V.
This function is suitable to implement an over current protection or hard-switching detection by using an
external sense resistor.
As the voltage on pin CSI can go negative, the current must be limited below 2mA by external compo-
nents.
Another feature of the DIM block is the internal interlocking that avoids cross-conduction in the half-
bridge FET's: if by chance both HGI and LGI input's are brought high at the same time, then LSG and HSG
are forced low as long as this critical condition persists.
11/14
Share Link: 