Pin connection L6520, L6521
4/19 Doc ID 16998 Rev 3
2 Pin connection
Figure 2. Pin connection
Table 2. Pin description
Symbol Pin Description
FPRE 1 Preheating frequency programming and ignition modes selection
EOL 2 Window comparator input
HBCS 3 Current sensing input
PWM_det 4 Half bridge middle point monitor
GND 5 IC power and signal ground
LSD 6 Low side driver output
HSD 7 High side driver output
VCC 8 Power supply
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L6520, L6521 Maximum ratings
Doc ID 16998 Rev 3 5/19
3 Maximum ratings
Table 3. Absolute maximum ratings
Symbol Pin Parameter Conditions Value Unit
V
Z
8 Active clamp protection voltage
Active clamp protection must not be supplied
by a low impedance voltage source
18.5 V
I
VCC
8 Active clamp protection current During low consumption state 2 mA
V
OD1
6,7
Differential voltage between
driver output and V
CC
V
OD1
= V
CC
– V
OUT
(1)
18.5 V
V
OD2
6,7
Differential voltage between
driver output and GND
V
OD2
= V
OUT –
GND
(1)
18.5 V
V
FPRE
1 FPRE positive voltage 5 V
V
FPRE
1 FPRE negative voltage -0.3 V
V
PWM_det
4 PWM_det pin positive voltage PWM_det input current < 5mA 5.1 V
V
PWM_det
4 PWM_det pin negative voltage PWM_det output current < 0.1mA -0.3 V
V
HBCS
3 HBCS positive voltage 5 V
V
HBCS
3 HBCS negative voltage HBCS output current < 2mA -5 V
V
EOL,max
2 EOL positive voltage EOL input current < 5mA 5 V
V
EOL,min
2 EOL negative voltage EOL output current < 0.1mA -0.3 V
1. V
OUT
refers to the voltage at either LVG pin or HVG pin
Table 4. Thermal data
Symbol Description Value Unit
R
thJA Max. thermal resistance junction to ambient 150 °C/W
T
J Junction operating temperature range -40 to 150 °C
T
STG Storage temperature -55 to 150 °C
Electrical characteristics L6520, L6521
6/19 Doc ID 16998 Rev 3
4 Electrical characteristics
(a)
V
CC
= 16 V, T
A
= -25 °C to 85 °C, unless otherwise specified
a. This is a preliminary version: all the parameters are subject to change
Table 5. Electrical characteristics
Symbol Pin Parameter Test condition Min. Typ. Max. Unit
Supply voltage
V
CC
VCC Operating range After turn-on
(1)
10.5 V
Z
V
V
CC(ON)
VCC Turn-on threshold 13.5 15 16.5 V
V
CC(OFF)
VCC Turn-off threshold 10.5 11.5 12.5 V
V
Z
VCC Zener voltage I
Z
= 2 mA 16.5 17.5 18.5 V
Supply current
I
ST-UP
VCC Start-up current Before turn-on, (V
CC
= 13 V) 130 200 µA
I
CC
VCC Operating supply current No load 8 10 mA
I
Q
VCC Quiescent current IDLE mode,
(2)
150 220 µA
Timing and oscillator
D Output duty cycle Run mode 49.5 50 50.5 %
t
DEAD
Fixed dead time
(3)
1.24 1.42 1.6 µs
f
RUN
HB run frequency
T
AMB
= 25° C 46 46.6 47.2 kHz
43.2 47.8 kHz
f
PRE
Max programmable
preheating frequency
R
FPRE
= 24.9 k 96 100 104 kHz
t
PRE
Preheating time
R
FPRE
196 ,
(1)
,
(4)
, L6520 1.5 s
R
FPRE
196 ,
(2)
,
(4)
, L6521 0.8
f
INS
HB instant start initial
frequency
FPRE connected to GND,
(2)
85 kHz
df
IGN
/dt
Ignition time frequency sweep
rate
(4)
, T
AMB
= 25 °C -2.75 kHz/ms
df
CCC
/dt
Frequency sweep rate after
overcurrent
(4)
, T
AMB
= 25 °C -500 Hz/ms
I
FPRE
FPRE FPRE current reference
T
AMB
= 25 °C 200 202 204
µA
192 204
t
ON,min
HSD LSD Minimum half bridge on time T
AMB
= 25 °C 1 µs
Half bridge drivers
V
OL
HSD LSD Output low voltage Iload = 300 mA 3 V

L6521

Mfr. #:
Manufacturer:
STMicroelectronics
Description:
Display Drivers & Controllers LV Smart Ballast CTR Half Bridge BJT FET
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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