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STMicroelectronics Electronic Components Datasheet

L6382D5 Datasheet

POWER MANAGEMENT UNIT FOR MICROCONTROLLED BALLAST

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L6382D5 pdf
L6382D5
POWER MANAGEMENT UNIT FOR MICROCONTROLLED
BALLAST
1 FEATURES
INTEGRATED HIGH-VOLTAGE START-UP
4 DRIVERS FOR PFC, HALF-BRIDGE & PRE-
HEATING MOSFETS
FULLY INTEGRATE POWER MANAGEMENT
FOR ALL OPERATING MODES
5V MICROCONTROLLER COMPATIBLE
INTERNAL TWO POINT Vcc REGULATOR
OVER-CURRENT PROTECTION WITH
DIGITAL OUTPUT SIGNAL
CROSS-CONDUCTION PROTECTION
(INTERLOCKING)
UNDER VOLTAGE LOCK OUT
INTEGRATED BOOTSTRAP DIODE
2 APPLICATIONS
DIMMABLE/NON-DIMMABLE BALLST
3 DESCRIPTION
Designed in High-voltage BCD Off-line technolo-
gy, the L6382D5 is provided with 4 inputs pin and
a high voltage start-up generator conceived for ap-
Figure 1. Package
SO20
Table 1. Order Codes
Part Number
L6382D5
L6382D5TR
Package
SO20 tube
SO20 in Tape & Reel
plications managed by a microcontroller. It allows
the designer to use the same ballast circuit for dif-
ferent lamp wattage/type by simply changing the
µC software.
The digital input pins - able to receive signals up to
400KHz - are connected to level shifters that pro-
vide the control signals to their relevant drivers; in
particular the L6382D5 embeds one driver for the
PFC pre-regulator stage, two drivers for the ballast
Figure 2. Block Diagram
HVSU
TPR
>600VHIGH
“OVNOLTAGE
START-UP
G“OEFNF”ERATOR
IC BIAS
µP UVLO
ON
5V
SUPPLY
L
PSW
O
G
I
C
DIM
TPR
BOOTSTRAP
RQ
LEVEL SHIFT
5V 600V
SQ
RQ
SQ
HED
HSD
LSD
OCP
PFD
BOOT
HSG
OUT
LSG
CSO
CSI
HEG
PFG
REF
GND
Vcc HSI LSI HEI PFI
January 2005
Rev. 1
1/14


STMicroelectronics Electronic Components Datasheet

L6382D5 Datasheet

POWER MANAGEMENT UNIT FOR MICROCONTROLLED BALLAST

No Preview Available !

L6382D5 pdf
L6382D5
half-bridge stage (High Voltage, including also the bootstrap function) and the last one to provide supple-
mentary features like preheating of filaments supplied through isolated filaments in dimmable applications.
A precise reference voltage (+5V ±1%) able to provide up to 30mA is available to supply the µC in oper-
ating mode. Instead, during start-up and save mode the current available at VREF is up to 10mA and it is
provided by the internal high voltage start-up generator.
The chip has been conceived with advanced power management logic to minimize power losses and in-
crease the application reliability.
In the half-bridge section, a patented integrated bootstrap section replaces the external bootstrap diode.
The L6382D5 integrates also a function that regulates the IC supply voltage (without the need of any ex-
ternal charge pump) and optimizes the current consumption.
Figure 3. Pin Connection (Top View)
PFI
LSI
HSI
HEI
PFG
N.C.
TPR
GND
LSG
VCC
1
2
3
4
5
6
7
8
9
10
20 VREF
19 CSI
18 CSO
17 HEG
16 N.C.
15 HVSU
14 N.C.
13 OUT
12 HSG
11 BOOT
Figure 4. Typical System Block Diagram
PFC
CIRCUIT
AC
MAINS
HV
START-UP
PFC
DRIVER
CHARGE
PUMP
REGULATOR
5V
SUPPLY
BOOTSTRAP
HB
DRIVER
PROTECTION
TL
µC
2/14


Part Number L6382D5
Description POWER MANAGEMENT UNIT FOR MICROCONTROLLED BALLAST
Maker STMicroelectronics
Total Page 14 Pages
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