L6520 STMICROELECTRONICS [STMicroelectronics], L6520 Datasheet - Page 7

• Manufacturer Part Number: L6520
• Description: Highly integrated ballast controller for TL and CFL
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

L6520, L6521
Table 5.
Storage time compensation and hard switching detection
V
Half bridge current control circuit (CCC)
Symbol
V
P_dclamp
T
V
∆f
T
T
THM
∆f
∆f
t
I
THH
TLM
V
I
OUTup
THL
TLH
TLL
HSW
PROT
SRC
SNK
I
FALL
HSW
RISE
PD
t1
t2
slow
OH
TxL
fast
PWM_det PWM detector threshold
PWM_det
PWM_det Clamping voltage
PWM_det
HSD LSD Output high voltage
HSD LSD Peak source current
HSD LSD Peak sink current
HSD LSD Rise time
HSD LSD Fall time
HSD LSD Pull down current
HBCS
HBCS
HBCS
HBCS
HBCS
HBCS
HBCS
HBCS
HBCS
HBCS
HBCS
Electrical characteristics (continued)
Pin
Hard switching detector
threshold
Max. time of hard switching
operation
First threshold in ignition
mode
Second threshold in ignition
mode
Third threshold in ignition
mode
First threshold in run mode
Second threshold in run mode
Third threshold in run mode
Maximum current control time
Minimum interval between two
consecutive threshold
crossing for slow events
Minimum interval between two
consecutive threshold
crossing for fast events (not
saturating)
Frequency increase in case of
lower threshold crossing
Frequency increase in case of
slow event
Frequency increase in case of
fast event
Parameter
Doc ID 16998 Rev 3
Iload = 300 mA
Cload = 1 nF
Cload = 1 nF
Before turn-on, (V
V
Positive going HB middle point
Negative going HB middle point
I
(4)
(4)
(4)
(4)
(4)
(4)
(4)
PWM_det
LSD
, T
, T
, T
, T
, T
, T
, T
AMB
AMB
AMB
AMB
AMB
AMB
AMB
or V
Test condition
= 2 mA
= 25 °C
= 25 °C
= 25 °C
= 25 °C
= 25 °C
= 25 °C
= 25 °C
HSD
= 1V
CC
= 13V)
Electrical characteristics
Min. Typ. Max.
2.65
0.96
1.21 1.26 1.31
0.67
0.87
300
300
4.5
2.4
1.7
13
20
2
200
200
510
255
2.5
0.7
0.9
1.8
1
5
1
1
2
2.35
1.04
0.73
0.93
120
120
5.5
2.6
1.9
3
Unit
kHz
kHz
kHz
mA
mA
mA
ms
ms
ns
ns
ns
ns
V
V
V
V
V
V
V
V
V
V
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