L6520
L6521
Highly integrated ballast controller for TL and CFL
Features
■
Half bridge circuit able to drive both BJT and
MOSFET transistors
■
Very accurate oscillator precision in wide
operating temperature range
■
BJTs' storage time compensation
■
Preheated start and instant start
■
Hard switching protection
■
Overcurrent / voltage protection
■
Choke saturation control
■
End-of-life protection
■
Programmable without capacitors
SO8
Applications
■
Electronic ballasts (TL, Industrial CFL)
■
Integrated CFLs
Table 1.
Device summary
Order codes
Package
Packaging
L6520
Tube
L6520TR
Tape and reel
SO8
Figure 1.
L6521
Tube
L6521TR
Tape and reel
Block diagram
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March 2011
Doc ID 16998 Rev 3
1/19
www.st.com
19
Contents
L6520, L6521
Contents
1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Functions description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.1
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2
Preheating and instant start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.3
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.4
Run mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.5
Storage time compensation network . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.6
Current control circuit (CCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.6.1
Hard switching protection (HSP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.6.2
Overcurrent protection (OCPH) during ignition mode . . . . . . . . . . . . . . 11
5.6.3
Overcurrent protection (OCPL) during run mode . . . . . . . . . . . . . . . . . . 11
5.6.4
Choke saturation control (CSC) during ignition and run mode . . . . . . . 12
5.7
End of life (EOL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.8
Summary of protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6
Typical electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7
Application examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
9
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2/19
Doc ID 16998 Rev 3
L6520, L6521
1
Description
Description
The L6520/1 is the first highly integrated ballast controller in the market able to drive both
BJTs and MOSFETs, providing all the necessary protections to ensure the maximum
reliability of the application in compliance with major safety and power consumption
regulations.
By adopting BJTs switches in the application, the IC allows to replace more expensive
MOSFETs, strongly reducing the system cost without compromises.
The IC represents also the best and cost effective solution to replace self oscillating
solutions when the key requirement is the reliability of the ballast. The benefits are an
increased MTBF and a reduction of the costs due to the return from the field.
The higher level of flexibility and integration provided allows the possibility to quickly design
ballast with any kind of lamp topology/size/power, without limitations. Depending on the
power of the lamp, the IC can work without PFC, with passive PFC or with active PFC. In the
latter case the L6562A from STMicroelectronics is the suggested IC for the most cost
effective solution.
The IC is fully programmable using only resistors and offers over current protections, choke
saturation control and hard switching protection thanks to a sophisticated current control
circuit (CCC). In ignition, the CCC limits both the maximum lamp voltage in case of old or
broken lamp, and also the lamp current in case of inductor saturation.
When the IC is driving bipolar transistors, a variable dead time ensures the correct base
discharge time avoiding cross conduction phenomena. Moreover, the IC prevents the failure
due to the lamp's end of life (EOL).
Doc ID 16998 Rev 3
3/19
Pin connection
2
L6520, L6521
Pin connection
Figure 2.
Table 2.
4/19
Pin connection
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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
Doc ID 16998 Rev 3
L6520, L6521
Maximum ratings
3
Maximum ratings
Table 3.
Absolute maximum ratings
Symbol
Pin
Parameter
Conditions
Value
Unit
VZ
8
Active clamp protection voltage
Active clamp protection must not be supplied
by a low impedance voltage source
18.5
V
IVCC
8
Active clamp protection current
During low consumption state
2
mA
VOD1
6,7
Differential voltage between
driver output and VCC
VOD1 = VCC – VOUT (1)
18.5
V
VOD2
6,7
Differential voltage between
driver output and GND
VOD2 = VOUT – GND (1)
18.5
V
VFPRE
1
FPRE positive voltage
5
V
VFPRE
1
FPRE negative voltage
-0.3
V
VPWM_det
4
PWM_det pin positive voltage
PWM_det input current < 5mA
5.1
V
VPWM_det
4
PWM_det pin negative voltage
PWM_det output current < 0.1mA
-0.3
V
VHBCS
3
HBCS positive voltage
5
V
VHBCS
3
HBCS negative voltage
HBCS output current < 2mA
-5
V
VEOL,max
2
EOL positive voltage
EOL input current < 5mA
5
V
VEOL,min
2
EOL negative voltage
EOL output current < 0.1mA
-0.3
V
1. VOUT refers to the voltage at either LVG pin or HVG pin
Table 4.
Thermal data
Symbol
RthJA
TJ
TSTG
Description
Value
Unit
150
°C/W
Junction operating temperature range
-40 to 150
°C
Storage temperature
-55 to 150
°C
Max. thermal resistance junction to ambient
Doc ID 16998 Rev 3
5/19
Electrical characteristics
L6520, L6521
Electrical characteristics (a)
4
VCC = 16 V, TA = -25 °C to 85 °C, unless otherwise specified
Table 5.
Symbol
Electrical characteristics
Pin
Parameter
Test condition
Min. Typ. Max.
Unit
Supply voltage
After turn-on (1)
VCC
VCC
Operating range
VCC(ON)
VCC
Turn-on threshold
13.5
VCC(OFF)
VCC
Turn-off threshold
VZ
VCC
Zener voltage
IZ = 2 mA
10.5
VZ
V
16.5
V
10.5 11.5 12.5
V
16.5 17.5 18.5
V
130
200
µA
8
10
mA
150
220
µA
50
50.5
%
1.6
µs
15
Supply current
IST-UP
VCC
Start-up current
Before turn-on, (VCC = 13 V)
ICC
VCC
Operating supply current
No load
IQ
VCC
Quiescent current
IDLE mode,
(2)
Timing and oscillator
D
Output duty cycle
Run mode
49.5
tDEAD
Fixed dead time
(3)
1.24 1.42
fRUN
HB run frequency
fPRE
Max programmable
preheating frequency
tPRE
Preheating time
fINS
HB instant start initial
frequency
TAMB = 25° C
46
46.6 47.2
kHz
47.8
kHz
104
kHz
43.2
RFPRE = 24.9 kΩ
96
100
RFPRE ≥ 196 Ω, (1), (4), L6520
1.5
RFPRE ≥ 196 Ω, (2), (4), L6521
0.8
FPRE connected to GND, (2)
85
kHz
s
dfIGN/dt
Ignition time frequency sweep (4)
, TAMB = 25 °C
rate
-2.75
kHz/ms
dfCCC/dt
Frequency sweep rate after
overcurrent
-500
Hz/ms
IFPRE
tON,min
FPRE
(4),
TAMB = 25 °C
TAMB = 25 °C
FPRE current reference
200
202
µA
192
HSD LSD Minimum half bridge on time
TAMB = 25 °C
204
204
µs
1
Half bridge drivers
VOL
HSD LSD Output low voltage
Iload = 300 mA
a. This is a preliminary version: all the parameters are subject to change
6/19
Doc ID 16998 Rev 3
3
V
L6520, L6521
Table 5.
Symbol
Electrical characteristics
Electrical characteristics (continued)
Pin
Parameter
VOH
HSD LSD Output high voltage
ISRC
Test condition
Unit
13
V
HSD LSD Peak source current
300
mA
ISNK
HSD LSD Peak sink current
300
mA
TRISE
HSD LSD Rise time
Cload = 1 nF
120
ns
TFALL
HSD LSD Fall time
Cload = 1 nF
120
ns
HSD LSD Pull down current
Before turn-on, (VCC = 13V)
VLSD or VHSD = 1V
IPD
Iload = 300 mA
Min. Typ. Max.
20
mA
Storage time compensation and hard switching detection
VOUTup
PWM_det PWM detector threshold
VHSW
PWM_det
Hard switching detector
threshold
VP_dclamp PWM_det Clamping voltage
tHSW
PWM_det
Positive going HB middle point
2.65
3
V
Negative going HB middle point
2
2.35
V
5.5
V
IPWM_det = 2 mA
Max. time of hard switching
operation
(4),
4.5
TAMB = 25 °C
5
200
ms
Half bridge current control circuit (CCC)
THL
HBCS
First threshold in ignition
mode
0.96
1.04
V
THM
HBCS
Second threshold in ignition
mode
1.21 1.26 1.31
V
THH
HBCS
Third threshold in ignition
mode
2.4
2.5
2.6
V
TLL
HBCS
First threshold in run mode
0.67
0.7
0.73
V
TLM
HBCS
Second threshold in run mode
0.87
0.9
0.93
V
TLH
HBCS
Third threshold in run mode
1.7
1.8
1.9
V
Maximum current control time
(4),
1
TAMB = 25 °C
200
ms
HBCS
Minimum interval between two
(4)
consecutive threshold
, TAMB = 25 °C
crossing for slow events
510
ns
t2
HBCS
Minimum interval between two
consecutive threshold
(4), T
AMB = 25 °C
crossing for fast events (not
saturating)
255
ns
∆fTxL
HBCS
Frequency increase in case of (4)
, TAMB = 25 °C
lower threshold crossing
1
kHz
∆fslow
HBCS
Frequency increase in case of (4)
, TAMB = 25 °C
slow event
1
kHz
∆ffast
HBCS
Frequency increase in case of (4)
, TAMB = 25 °C
fast event
2
kHz
TPROT
t1
Doc ID 16998 Rev 3
7/19
Electrical characteristics
Table 5.
L6520, L6521
Electrical characteristics (continued)
Symbol
Pin
tLEB
HBCS
Parameter
Test condition
Leading edge time after LSD
turn on
(4)
Min. Typ. Max.
Unit
255
ns
, TAMB = 25 °C
End of life
1.
VEOL
EOL
EOL pin biasing voltage
reference
2.43
2.5
2.57
V
VEOL_H
EOL
EOL upper threshold
3.84
4
4.16
V
VEOL_l
EOL
EOL lower threshold
0.96
1
1.04
V
IEOL
EOL
Sink/source capability
VEOL = 1.5V (source)
VEOL = 3.5V (sink)
8.2
9.1
10
µA
tEOL
EOL
Protection delay time
(4),
TAMB = 25 °C
1.5
During the operation at Vcc ≥ Vz the maximum supply current must be limited to 2mA.
2. Guaranteed by characterization.
3. tDEAD is the sum of a fixed time, generated by internal logic and the propagation delay of PWM_det comparator.
4. Guaranteed by testing logic verification.
8/19
Doc ID 16998 Rev 3
s
L6520, L6521
Functions description
5
Functions description
5.1
Start-up
During the first start-up ramp of the supply voltage (VCC) both driver outputs, LSD and HSD,
are low impedance to ground (Isink 20 mA min). Once the VCC voltage reaches the turn-on
voltage VCC(ON) the IC starts its operation. During the first 100 µs the IC senses the status
of FPRE pin to detect the programmed preheating frequency and the selected ignition mode
(instant or preheated start). When all the IC internal functions are ready, the driver-outputs
are released.
If the preheated start is selected, the half-bridge oscillates at the programmed preheating
frequency, otherwise it starts from 85 kHz (typ.).
5.2
Preheating and instant start
The preheating time is 1.5 s (typ.) in the L6520 and 0.8 s (typ.) in the L6521. The FPRE pin
embeds a precise current reference: the voltage read by this pin sets the preheating
frequency or enables the instant start. If the FPRE pin is connected to ground, the instant
start is active and the IC runs immediately into ignition sequence from the starting frequency
of 85 kHz. If the pin FPRE is connected to a resistor equal or higher than 196 Ω, the
preheating frequency can be programmed from 55 kHz upwards till 100 kHz (1.5 kHz/step)
accordingly to Table 6. For the best precision the resistor tolerance should be less or equal
to 1%. After the preheating sequence, the IC runs into ignition mode.
Table 6.
Preheating and instant start
FPRE (kHz)
RFPRE (Ω)
FPRE (kHz)
RFPRE (Ω)
Instant start
0
77.5
5490
55
196
79
6190
56.5
383
80.5
6980
58
576
82
7870
59.5
806
83.5
8660
61
1050
85
9530
62.5
1300
86.5
10500
64.
1580
88
11500
65.5
1870
89.5
12700
67
2210
91
14000
68.5
2550
92.5
15400
70
2940
94
16900
71.5
3400
95.5
18700
73
3830
97
20500
74.5
4320
98.5
22600
76
4870
100
24900
Doc ID 16998 Rev 3
9/19
Functions description
5.3
L6520, L6521
Ignition
During the ignition sequence the output frequency ramps down from the programmed
preheating frequency to the fixed run frequency with a fixed rate dfIGN/dt of - 2.75 kHz/ms. If
the instant start is selected, the frequency ramps down from 85 kHz to 46.6 kHz (typ.) with
the same rate.
The current control circuit limits the maximum lamp voltage (OCPH) in case of old or broken
lamp and it is able to control the lamp current in case of inductor saturation (CSC).
The ignition phase lasts for maximum 200 ms. If the Run frequency is not reached during
ignition phase, the IC is turned off (latched).
5.4
Run mode
The run frequency is internally set to 46.6 kHz.
The HSD and LSD pins drive respectively the high side and the low side switches. The
potential isolation to the high side switch is realized by a pulse transformer. The HSD and
LSD drivers are able to manage the inductive load represented by the primary side of the
pulse transformer.
Between the turn-off of one driver and turn-on of the other one there is a dead time
automatically optimized accordingly to the kind of the half bridge switches (MOS or BJT) to
ensure the maximum reliability. The CCC protects the circuit against over currents, choke
saturation and hard switching events.
5.5
Storage time compensation network
In all the operating states (preheating, ignition and run mode), the storage time
compensation ensures the application of the fixed dead time (tDEAD, 1.42 us typ.) once the
BJT's collector current is effectively reduced to zero. The tDEAD is the sum of a fixed time,
generated by internal logic and the propagation delay of PWM_det comparator.
The voltage level of the middle point of the half bridge is monitored through the PWM_det
pin: the high side switch is turned on after a fixed dead time from the instant when the
voltage on the PWM_det pin is above 2.65 V. The time between the falling edge of pin LSD
and the rising edge of HSD is recorded in order to set the same dead time between the
falling edge of pin HSD and the rising edge of pin LSD.
The minimum duration of the resulting ON time is internally limited to 1 µs. This condition
can last for a maximum time equal to 200 ms. After this time the IC is shut down (latched).
The PWM_det pin embeds a 5 V (typ.) clamping zener, allowing the connection between the
half bridge middle point and the pin itself by means of a limiting resistor.
When driving MOSFET no storage time is present, therefore the resulting dead time is equal
to (1.42 µs).
10/19
Doc ID 16998 Rev 3
L6520, L6521
5.6
Functions description
Current control circuit (CCC)
The current control circuit (CCC) is a sophisticated circuit able to protect the ballast against
any possible failure. It limits the maximum lamp voltage during ignition (OCPH), overcurrent
protection (OCPL) during run mode, chokes saturation control (CSC) and hard switching
protection (HSP). The control circuit senses the voltage on HBCS pin and PWM_det pin.
Figure 3 on page 13 shows the CCC protections active in each operating mode (preheating,
ignition and run):
5.6.1
Hard switching protection (HSP)
If the voltage on PWM_det pin is higher than 2.35 V at the moment the LS driver turns on,
an up-down event counter is increased and an internal timer is started. Without hard
switching events, the counter decreases at every cycle and the timer is reset when 0 is
reached. If the events counter value is higher than 0 after 200 ms from the detection of the
first event, then the IC is turned off (latched).
5.6.2
Overcurrent protection (OCPH) during ignition mode
The protection results in lamp voltage limitation during ignition. In this phase three
thresholds are active (THL, THM and THH):
If the first threshold is crossed the frequency is increased by 1 kHz during the next cycle.
The interval between the crossings of the two lower thresholds (THL and THM) is used as
an indication of the slope of the half bridge current: if this interval is longer than t1 = 510 ns
the event is considered “slow” and the frequency is increased by another 1 kHz/cycle during
the next cycle. If the interval is shorter than t1 = 510 ns but longer than t2 = 255 ns, the
event is considered “fast” and the frequency is increased by another 2 kHz/cycle during the
next cycle.
If no further threshold crossing is detected, the frequency is decreased with a fixed rate
equal to dfCCC/dt = - 500 Hz/ms, until the frequency at which the lowest threshold was
crossed firstly is reached; then, the decreasing ratio becomes again dfIGN/dt.
If the run frequency has not been reached within 200 ms after the lower threshold was
crossed the first time, the IC is turned off (latched).
A leading edge blanking of 255 ns is active.
5.6.3
Overcurrent protection (OCPL) during run mode
The behavior of the OCPL is similar to the OCPH but with reduced thresholds (TLL, TLM
and TLH) since the current involved in this phase is smaller. If no further threshold crossing
is detected, the frequency is decreased with a fixed rate equal to dfCCC/dt = - 500 Hz/ms,
until the run frequency is reached.
If the run frequency has not been reached after 200 ms from when the lower threshold was
crossed the first time, the IC is turned off (latched).
A leading edge blanking of 255 ns is active.
Doc ID 16998 Rev 3
11/19
Functions description
5.6.4
L6520, L6521
Choke saturation control (CSC) during ignition and run mode
The same thresholds used to detect OCPH and OCPL are active.
The control is still based on the time between two consecutive thresholds but its behavior is
different with respect to the OCPH/OCPL detection to take into account the increase of dI/dt
when the inductor is saturating. When either the two lower thresholds are crossed in a time
shorter than 255 ns or the higher threshold is crossed, the LS driver is immediately turned
off and the time between the LS turn on and the instant when the second threshold (THM or
TLM) is crossed is used to calculate the new (higher) frequency.
If this new frequency is higher than 100 kHz then the new frequency will be set at 100 kHz.
The frequency is then decreased with a fixed df/dt equal to dfCCC/dt = - 500 Hz/ms, until the
frequency at which the first threshold was crossed is reached. Then, the decreasing ratio
becomes again dfIGN/dt during ignition whereas, during run mode, the dfCCC/dt decreasing
ratio is maintained until run frequency is reached.
If the run frequency has not been reached after 200 ms from when the lower threshold was
crossed the first time, the IC is turned off (latched).
A leading edge blanking of 255 ns is active.
5.7
End of life (EOL)
An embedded window comparator can be used to detect the end of life (EOL) when the
lamp is directly connected to ground (lamp to ground configuration).
After the ignition sequence, the EOL window comparator becomes active. When the voltage
at EOL pin goes outside the limits of this comparator a 1.5 s timer is started. If the EOL pin
voltage does not return inside the allowed range before the end of the timer, the IC is shut
down (latched).
The EOL pin is biased to the center of the window comparator by means of an OTA (2.5 V
typ. with +/- 1.5 V typ. window), having a current capability equal to 9.1 µA (typ.).
12/19
Doc ID 16998 Rev 3
L6520, L6521
5.8
Functions description
Summary of protections
Figure 3.
Summary of protections
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Table of faults
Active during
Fault
Condition
Ic behaviour
PH Ign Run
Minimum
driving pulse
duration
Inductor
saturation
Hard switching
Overcurrent
End Of Life
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- The drivers are stopped after
200 ms of minimum pulse
Driving pulses shorter than 1 µs duration events
- The IC is shut down in low
consumption mode
HBCS TxL and TxM thresholds
crossed in less than 255 ns
OR
Higher threshold crossing
LS driver turned off and a new
frequency is calculated.
If the situation is not recovered
after 200 ms, the IC is shut down
in low consumption mode
Required
action
VCC cycle
VCC cycle
9
IC is shut down in low
PWM_det higher than 2.35 V at
consumption mode after 200 ms
LSD turn on
of HSW events
VCC cycle
9 9
Frequency increase proportional
HBCS TxL and TxM thresholds to the failure.
crossing (different values during If the situation is not recovered
ignition or run mode)
after 200 ms the IC is shut down
in low consumption mode
VCC cycle
- Delay time started
EOL voltage outside the limits of - If EOL voltage is outside the
limits of the window comparator at
the window comparator
the end of the timer count than
the IC is shut down (latched)
VCC cycle
9
Doc ID 16998 Rev 3
13/19
Typical electrical characteristics
6
L6520, L6521
Typical electrical characteristics
Figure 4.
VCC thresholds vs temperature
Figure 5.
Frequencies vs temperature
1.005
20
1
Vz
18
VCC(on)
VCC Voltage
16
14
VCC(off)
12
Normalized Frequency
0.995
0.99
0.985
0.98
0.975
0.97
10
0.965
0.96
8
-25
0
25
50
-25
75
0
25
Figure 6.
50
75
Temperature [ C]
Temperature [ C]
Times vs temperature
Figure 7.
FPRE resistance converter
temperature behavior
203
5.01
1.04
202
1.035
5.005
201
1.03
1.02
1.015
IFPRE
4.995
199
Vref
198
1.01
197
1.005
196
1
195
Vref (V)
IFPRE [uA]
Time intervals [normalized]
5
200
1.025
4.99
4.985
4.98
0.995
194
-25
0
25
50
75
4.975
-25
0
Temperature [ C]
IEOL vs temperature
Figure 9.
9.45
16
9.4
14
9.35
12
50
75
LSG and HSG output voltage vs
temperature (driver's current:
300mA)
VOH
10
9.3
Vout_driver [V]
IEOL (absolute value) [uA]
Figure 8.
25
Temperature [ C]
IEOL
(source)
9.25
8
6
9.2
IEOL
(sink)
9.15
4
9.1
2
VOL
0
9.05
-25
0
25
50
75
-25
14/19
0
25
Temperature [ C]
Temperature [ C]
Doc ID 16998 Rev 3
50
75
L6520, L6521
7
Application examples
Application examples
Figure 10. BJT application example
&YFF
+9
5VWXS
&FS
+6
)35(
(2/
5SUH
9&&
+6'
+%&6
/6'
3:0BGHW
*1'
&%/2&.
/5(6
/6
5287
5287
5(
&5(6
'=
'=
5(
5+%&6
Figure 11. MOSFET application example
&YFF
+9
5VWXS
&FS
+6
)35(
(2/
5SUH
9&&
+6'
+%&6
/6'
3:0BGHW
*1'
&%/2&.
/6
5287
5287
/5(6
5(
&5(6
'=
'=
5(
5+%&6
Doc ID 16998 Rev 3
15/19
Package mechanical data
8
L6520, L6521
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK is an ST trademark.
Table 8.
SO-8 mechanical data
mm.
inch
Dim.
Min
Typ
Max
Min
Typ
Max
A
1.35
1.75
0.053
0.069
A1
0.10
0.25
0.004
0.010
A2
1.10
1.65
0.043
0.065
B
0.33
0.51
0.013
0.020
C
0.19
0.25
0.007
0.010
(1)
4.80
5.00
0.189
0.197
E
3.80
4.00
0.15
0.157
D
e
1.27
0.050
H
5.80
6.20
0.228
0.244
h
0.25
0.50
0.010
0.020
L
0.40
1.27
0.016
0.050
k
ddd
0° (min.), 8° (max.)
0.10
0.004
1. Dimensions D does not include mold flash, protrusions or gate burrs. Mold flash, potrusions or gate burrs
shall not exceed 0.15mm (.006inch) in total (both side).
16/19
Doc ID 16998 Rev 3
L6520, L6521
Package mechanical data
Figure 12. Package dimensions
Doc ID 16998 Rev 3
17/19
Revision history
9
L6520, L6521
Revision history
Table 9.
18/19
Document revision history
Date
Revision
Changes
19-Jan-2010
1
Initial release
08-Feb-2011
2
Added: L6521 option, Section 6: Typical electrical characteristics
Updated: Coverpage, Figure 1, Table 4, Table 5, Section 1, Figure 3,
Table 7, Figure 10, Figure 11
09-Mar-2011
3
Datasheet updated from preliminary data to final datasheet
Doc ID 16998 Rev 3
L6520, L6521
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Doc ID 16998 Rev 3
19/19
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