Block description

L6382D

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7

Block description

7.1

Supply section

●

µPUVLO (µPower Under Voltage Lock Out): This block controls the power

management of the L6382D ensuring the right current consumption in each operating

up generator switching.

During Start-up the device sinks the current necessary to charge the external capacitor

and the current consumption of the whole IC is less than 150

µA.

µPUVLO block controls Vcc between VccON and VccSM by switching ON/OFF the

high voltage start-up generator.

●

HVSU (High-Voltage Start-Up generator): a 600V internal MOS transistor structure

controls the Vcc supply voltage during start-up and save mode conditions and it

reduces the power losses during operating Mode by switching OFF the MOS transistor.

The transistor has a source current capability of up to 30mA.

●

TPR (Two Point Regulator) & PWS: during normal mode, the TPR block controls the

between TPR(ON) and TPR(OFF) by switching ON and OFF the PSW transistor

Figure 11.

–

Vcc > TPRst: the PSW is switched ON immediately;

–

TPR(ON) < Vcc < TPRst: the PSW is switched ON at the following falling edge of

LGI;

–

Vcc < TPR(OFF): the PSW is switched OFF at the following falling edge on LGI.

When the PSW switch is OFF, the diodes build a charge pump structure so that, connecting

the TPR pin to a switching voltage (through a capacitor) it is possible to supply the low

voltage section of the chip without adding any further external component. The diodes and

7.2

3.3V reference voltage

This block is used to supply the microcontroller; this source is able to supply 10mA in save

available, an additional circuit is ensures that, even sinking 3mA, the pin voltage doesn't

exceed 1.2V.

additional sinking circuit is enabled again.