L6382D5 STMicroelectronics, L6382D5 Datasheet - Page 11

• Manufacturer Part Number: L6382D5
• Description: IC PMU MICROCTRL BALLAST 20-SOIC
• Manufacturer: STMicroelectronics
• Type: PFC/Ballast Controllerr

Specifications of L6382D5

• Current - Supply: 2mA
• Voltage - Supply: 8.25 V ~ 17 V
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-SOIC (7.5mm Width)
• Product: Charge Management
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Frequency: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-5356-5; L6382D5

L6382D5
5
5.1
5.2
Application information
Power management
The L6382D5 has two stable states (save mode and operating mode) and two additional
states that manage the Start-up and fault conditions: the Over Current Protection is a
parallel asynchronous process enabled when in operating mode
Following paragraphs will describe each mode and the condition necessary to shift between
them.
Figure 4.
START-UP mode
With reference to the timing diagram of figure 6, when power is first applied to the converter,
the voltage on the bulk capacitor (Vin) builds up and the HV generator is enabled to operate
drawing about 10mA. This current, diminished by the IC consumption (less than 150µA),
charges the bypass capacitor connected between pin Vcc and ground and makes its voltage
rise almost linear.
During this phase, all IC's functions are disabled except for:
●
●
As the Vcc voltage reaches the start-up threshold (14V typ.) the chip starts operating and
the HV generator is switched off.
the current sinking circuit on V
disabled the microcontroller connected to this pin;
the High-Voltage Start-Up (HVSU) that is ON (conductive) to charge the external
capacitor on pin Vcc.
State diagram
V
V
T
REF
CC
DE
>V
>10µs
&
>4.6V
CC(ON)
SAVE MODE
OPERATING
START-UP
MODE
REF
V
than 100µs
for more
CC
LGI low
<V
pin that maintains low the voltage by keeping
REF(OFF)
V
CC
<V
CC(ON)
V
CC
V
<V
CC
V
REF
REF(OFF)
< V
or
<3.2V
SHUT DOWN
CC(OFF)
Figure 4.
Application information
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