Data Sheet No. PD60212 revC
IR2520D(S) & (PbF)
ADAPTIVE BALLAST CONTROL IC
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Features
600V Half Bridge Driver
Integrated Bootstrap FET
Adaptive zero-voltage switching (ZVS)
Internal Crest Factor Over-Current Protection
0 to 6VDC Voltage Controlled Oscillator
Programmable minimum frequency
Micropower Startup Current (80uA)
Internal 15.6V zener clamp on Vcc
Small DIP8/SO8 Package
Also available LEAD-FREE (PbF)
Packages
8-Lead PDIP
IR2520D
8 Lead SOIC
IR2520DS
Description
The IR2520D(S) is a complete adaptive ballast controller and 600V half-bridge driver integrated into a single
IC for fluorescent lighting applications. The IC includes adaptive zero-voltage switching (ZVS), internal crest
factor over-current protection, as well as an integrated bootstrap FET. The heart of this IC is a voltage con-
trolled oscillator with externally programmable minimum frequency. All of the necessary ballast features are
integrated in a small 8-pin DIP or SOIC package.
Typical Application Diagram
RSUPPLY
DCP2
BR1
MHS
F1
L1
CBUS
CF
RFMIN
L2
LF
CVCC
VCC
1
COM
2
FMIN
VB
SPIRAL
CFL
8
7
6
5
LO
MLS
HO
VS
CBS
LRES
CSNUB
CDC
CRES
IR2520D
3
VCO
4
CVCO
DCP1
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1
IR2520D(S)& (PbF)
Absolute Maximum Ratings
Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage param-
eters are absolute voltages referenced to COM, all currents are defined positive into any lead. The thermal resistance
and power dissipation ratings are measured under board mounted and still air conditions.
Symbol
V
B
V
S
V
HO
V
LO
I
VCO
I
CC
dV
S
/dt
P
D
Rth
JA
T
J
T
S
T
L
Definition
High side floating supply voltage
High side floating supply offset voltage
High side floating output voltage
Low side output voltage
Voltage controlled oscillator input current (Note 1)
Supply current (Note 2)
Allowable offset voltage slew rate
Package power dissipation @ T
A
≤
+25°C
PD=(T
JMAX
-T
A
)Rth
JA
Thermal resistance, junction to ambient
8-Lead PDIP
8-Lead SOIC
8-Lead PDIP
8-Lead SOIC
Junction temperature
Storage temperature
Lead temperature (soldering, 10 seconds)
Min.
-0.3
V
B
- 25
V
S
- 0.3
-0.3
-5
-25
-50
—
—
—
—
-55
-55
—
Max.
625
V
B
+ 0.3
V
B
+ 0.3
V
CC
+ 0.3
+5
25
50
1
0.625
125
200
150
150
300
Units
V
mA
mA
V/ns
W
°C/W
°C
Note 1: This IC contains a zener clamp structure between the chip VCO and COM, which has a nominal breakdown voltage
of 6V. Please note that this pin should not be driven by a DC, low impedance power source greater than 6V.
Note 2: This IC contains a zener clamp structure between the chip VCC and COM, which has a nominal breakdown voltage
of 15.6V. Please note that this supply pin should not be driven by a DC, low impedance power source greater than the
VCLAMP specified in the Electrical Characteristics section.
Recommended Operating Conditions
For proper operation the device should be used within the recommended conditions.
Symbol
V
BS
V
S
V
CC
I
CC
R
FMIN
V
VCO
T
J
Definition
High side floating supply voltage
Steady state high side floating supply offset voltage
Supply voltage
Supply current
Minimum frequency setting resistance
VCO pin voltage
Junction temperature
Min.
V
CC
- 0.7
-1
V
CCUV+
Note 3
20
0
-25
Max.
V
CLAMP
600
V
CLAMP
10
140
5
125
Units
V
mA
kΩ
V
°C
Note 3: Enough current should be supplied into the VCC pin to keep the internal 15.6V zener clamp diode on this pin
regulating its voltage, VCLAMP.
2
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IR2520D(S) & (PbF)
Electrical Characteristics
V
CC =
V
BS =
V
BIAS
= 14V +/- 0.25V, C
LO
=C
HO
=1000pF, R
FMIN
= 82kΩ and T
A
= 25°C unless otherwise specified.
Symbol
V
CCUV+
V
CCUV-
V
UVHYS
I
QCCUV
I
QCCFLT
I
CCHF
I
CCLF
V
CLAMP
Definition
V
CC
and V
BS
supply undervoltage positive going
threshold
V
CC
and V
BS
supply undervoltage negative going
threshold
V
CC
supply undervoltage lockout hysteresis
UVLO quiescent current
Fault mode quiescent current
V
CC
supply current f=85KHz
V
CC
supply current f=35KHz
V
CC
Zener clamp voltage
Min. Typ. Max. Units Test Conditions
11.4
9.0
—
—
—
—
—
14.4
12.6
10.0
2.7
45
100
4.5
2.0
15.4
13.8
11.0
—
80
—
—
—
—
µA
mA
V
V
CC
= 10V
V
VCO
=0V
V
VCO
=6V
I
CC
= 10mA
V
V
CC
rising from OV
Supply Characteristics
Floating Supply Characteristics
I
QBS
0
I
QBSUV
V
BSUV+
V
BSUV-
I
LK
Quiescent V
BS
supply current
Quiescent V
BS
supply current
VBS supply undervoltage positive going threshold
VBS supply undervoltage negative going threshold
Offset supply leakage current
—
—
7.7
6.8
—
80
20
9.0
8.0
—
150
40
10.3
9.2
50
µA
V
V
µA
V
B
= V
S
= 600V
V
CC
=10V, V
BS
=14V
V
CC
=10V, V
BS
=7V
Oscillator I/O Characteristics
f
(min)
f
(
max)
D
DT
LO
DT
HO
I
VCOQS
I
VCOFS
I
VCO_
5V
V
VCO_
max
Minimum oscillator frequency (Note 4)
Maximum oscillator frequency (Note 4)
Oscillator duty cycle
LO output deadtime
HO output deadtime
I
VCO
quick start
I
VCO
frequency sweep
I
VCO
when VCO is at 5V
Maximum VCO voltage
29.6
67
—
—
—
—
0.8
—
—
34
86
50
2.0
2.0
50
1.3
1.1
6
38.2
96
—
—
—
—
1.7
—
—
kHz
%
µS
µA
V
V
VCO
=0V
V
VCO
=2V
V
VCO
=6V
V
VCO
=0V
Gate Driver Output Characteristics
V
LO=LOW
V
HO=LOW
V
LO=HIGH
V
HO=HIGH
T
RISE
T
FALL
IO+
IO-
LO output voltage when LO is low
HO output voltage when HO is low
LO output voltage when LO is high
HO output voltage when HO is high
Turn on rise time
Turn off fall time
Output source short circuit pulsed current
Output sink short circuit pulse current
—
—
—
—
—
—
—
—
COM
COM
VCC
VCC
150
75
140
230
—
—
—
—
230
120
—
—
mV
nS
mA
mA
Note 4: Frequency shown is nominal for R
FMIN
=82kΩ. Frequency can be programmed higher or lower with the value of R
FMIN
.
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3
IR2520D(S)& (PbF)
Electrical Characteristics
V
CC =
V
BS =
V
BIAS
= 14V +/- 0.25V, C
LO
=C
HO
=1000pF, R
FMIN
= 82kΩ and T
A
= 25°C unless otherwise specified.
Symbol
Definition
Min. Typ. Max. Units Test Conditions
Protection Characteristics
V
VCO_RUN
CSCF
VS_
OFFSET_MAX
VCO voltage when entering run mode
Crest factor peak-to-average fault factor
Maximum crest factor VS offset voltage
V
VCO
shutdown voltage
—
—
—
0.74
4.8
5.0
3.0
0.82
—
—
—
0.91
V
N/A
V
V
V
S
offset = 0.5V
V
VCOSD
Minimum Frequency Setting Characteristics
V
FMIN
V
FMINFLT
FMIN lead voltage during normal operation
FMIN lead voltage during fault mode
4.8
—
5.1
0
5.4
—
V
V
Bootstrap FET
IBS1
IBS2
VB current
VB current
30
10
70
20
—
—
mA
C
BS
=0.1uF,
V
S
=0V
VBS = 10V
Lead Definitions
Symbol
VCC
COM
FMIN
VCO
LO
VS
HO
VB
Description
Supply voltage
IC power and signal ground
Minimum frequency setting
Voltage controlled oscillator input
Low-side gate driver output
High-side floating return
High-side gate driver output
High-side gate driver floating supply
VCC
1
8
VB
IR2520D(S)
COM
2
7
HO
6
5
VS
LO
FMIN
3
VCO
4
4
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IR2520D(S) & (PbF)
Block Diagram
Bootstrap
FET
VCC
1
15.6V
COM
2
I
FMIN
I
VCO
I
QS
Bootstrap
FET
Control
I
FMAX
8
5V
UVLO
1V
S
R1
R2
Q
VB
HO
VS
7
6
High-Voltage Well
VS-Sensing
FET
VCC
VCO
4
5.1V
T
I
DT
CT
300ns
PGEN
0.8V
Fault
Logic
S1 Q
S2
R1
R2 Q
R
Q
Q
Driver
Logic
HIN
Level
Shift
PGEN
SET
RST
Level-Shift
FETs
LIN
5
LO
1us
blank
Averaging
Circuit
x5
VCC
4.8V
S
R
Q
Q
UVLO
120uA
5V
I
FMIN
=
5V
R
RFMIN
FMIN
3
All values are typical
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