2005 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.0
Features
Floating Channel Designed for Bootstrap Operation to
+600V.
Lower di/dt Gate Driver for Better Noise Immunity
Driver Current Capability: 250mA/500mA
Low Start-up and Operating Current: 120
A, 6.4mA
Under Voltage Lock Out (UVLO) with
1.8V of Hysteresis
Programmable Preheat Time
and
Frequency
Programmable Run Frequency
Protection from Failure to Strike
Lamp Filament Sensing
and
Protection
Automatic Restart for Lamp Exchange
High Accuracy Oscillator
16-Pin SOP
Typical Application
General Purpose Ballast IC
Descriptions
The FAN7532 provides simple and high performance elec-
tronic ballast control functions. Optimized for an electronic
ballast, the FAN7532 requires a minimum board area, and
reduces component counts. The FAN7532 is intended to
drive two power MOSFETs in the classical half-bridge
topology with all the features needed to properly drive and
control a fluorescent lamp. The FAN7532 has many compre-
hensive protection features that work through filament fail-
ure, failure of a lamp to strike, and automatic restarts.
A dedicated timing section in the FAN7532 allows the user
to set the necessary parameters to preheat, ignite, and run the
lamp properly.
GND
Latch
1.8V
C
PH
Vcc
R
PH
R
T
HO
UVLO
11.8V
7
8
5
16
Frequency
Divider
&
Driving
Logic
R
Q
S
6
1.70V
5.15V
6.2I
CT
Ict
Irt=Vref/Rt
C
T
LO
Iph=Vref/Rph
Current
Source
Current
Source
2.9V
2.9V
Irt
5V
Ip
h
-
Ir
t
5V
Shutdown
Signal
Bias
Current
9V Vsup
TSD
11
Vz
4
10
1.
5
HVG
Driver
Level
Shift
1
2.1
S
Q
R
Q
13
OVP
2V
V
CPH
5V
OLP
2V
Vcc
9
10
VB
1
VS
15
OLP
OLP
12
PGND
OLP
OLP : Open Lamp Protection
15.6V
FAN7532
Ballast Control IC
16-SOP
1
FAN7532
2
Pin Assignments
Pin Definitions
Pin Number
Pin Name
Pin Function Description
1
VB
High Side Floating Supply Voltage
2
N.C.
No Connection
3
N.C.
No Connection
4
GND
Ground
5
CPH
Preheat Time Set Capacitor
6
CT
Oscillator Frequency Set Capacitor
7
RPH
Preheat Frequency Set Resistor
8
RT
Oscillator Frequency Set Resistor
9
OVP
Over Voltage Protection, Latch Mode
10
OLP
Open Lamp Protection, Only Output Disable Mode
11
Vcc
Supply Voltage
12
PGND
Power Ground
13
LO
Low Side Gate Driver Output
14
N.C.
No Connection
15
VS
High Side Floating Supply Return
16
HO
High Side Gate Driver Output
1
2
3
4
16
15
14
13
GND
NC
NC
VB
HO
VS
NC
LO
FA
N
7
5
3
2
5
6
7
8
12
11
10
9
PGND
VCC
OLP
OVP
CPH
CT
RPH
RT
FAN7532
3
Absolute Maximum Ratings
Caution: You must not supply a low impedance voltage source to the internal clamping zener diode that is between the GND and the V
cc
pin
of this device.
Recommended Operating Conditions
Temperature Characteristics (-25
C
Ta
125
C)
ESD Level
Note: ESD immunity for all pins
,
except for condition
noted above,
is guaranteed up to 2000V (Human Body Model) and 300V
(Machine Model).
Parameter
Symbol
Value
Unit
Supply Current
(
See Caution Below)
I
CC
25
mA
High Side Floating Supply Offset Voltage
V
S
V
B
-25 to V
B
+0.3
V
High Side Floating Supply Voltage
V
B
-0.3 to 625
V
High Side Floating Output Voltage, HO
V
HO
V
S
-0.3 to V
S
+0.3
Drive Output Source Current
I
OH
250
mA
Drive Output Sink Current
I
OL
500
mA
CPH, CT, RT, and RPH Pins Input Voltage
V
IN
-0.3 to 6
V
Allowable Offset Voltage Slew Rate
dV
S
/dt
50
V/ns
Operating Temperature Range
Topr
-25 to 125
C
Storage Temperature Range
Tstg
-65 to 150
C
Power Dissipation
16-SOP
Pd
0.94
W
Thermal Resistance (Junction-to-Air)
R
ja
100
C/W
Parameter
Symbol
Value
Unit
Supply Voltage
Vcc
11 to V
CL
V
High Side Floating Offset Supply Voltage
V
S
600
V
High Side Floating Supply Voltage
V
B
V
S
+11 to V
S
+20
V
High Side Floating Output Voltage, HO
V
HO
V
S
to V
B
V
Parameter
Symbol
Value
Unit
Temperature Stability for Operating Frequency (fos)
fos(Typ)
3
%
Parameter
Reference
Pins
Conditions
Level
Unit
Human Body Model
(HBM)
GND, CPH, CT, RPH,
RT, OVP, OLP, LO
VB, VS, HO
R=1.5k
, C=100pF
1000
V
Machine Model (MM)
GND
LO
C=200pF
+250
FAN7532
4
Electrical Characteristics
V
cc
=V
BS
=14V, Ta=25C unless otherwise specified
.
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
SUPPLY VOLTAGE SECTION
Start Threshold Voltage
V
TH(st)
V
CC
Increasing
11
11.8
12.6
V
UVLO Hysteresis
HY(st)
-
0.8
1.8
2.8
V
Supply Clamping Voltage
V
CL
Icc=12mA
14.7
15.6
16.5
V
Start-Up Supply Current
I
ST
V
CC
= 10V
-
120
180
A
Operating Supply Current
I
CC
Output Not Switching
-
6.4
9.5
mA
Dynamic Operating Supply Current:
(I
CC
+I
QBS
)
I
DCC
50kHz, C
L
=1nF
-
8.2
10.5
mA
OSCILLATOR SECTION
CPH Pin Charging Current 1
I
CPHL
V
CPH
=2V
1
1.5
2
A
CPH Pin Charging Current 2
I
CPHH
V
CPH
=4V
7.7
10
12.3
A
CPH Pin Clamp Voltage
V
CLAMP
-
5.1
5.65
6.2
V
Preheating Frequency
f
PH
V
CPH
=0V,
RPH=20k
, CT=1nF
75
85
95
kHz
Preheating Dead Time
t
PD
V
CPH
=0V,
RPH=20k
, CT=1nF
0.75
1.20
1.55
s
Operating Frequency
f
OSC
V
CPH
=Open,
RT=18k
, CT=1nF
48
50
52
kHz
Operating Dead Time
t
OD
V
CPH
=Open,
RT=18k
, CT=1nF
1.5
2
2.3
s
Differential Threshold Voltage on CT
V
CT
-
3
3.45
4
V
CT Charging Current
Ich
V
CT
=1.5V
400
460
510
A
CT Discharging Current
Idisch
V
CT
=5.5V
1.95
2.4
2.8
mA
Voltage Stability
f/
V
12.7V
V
CC
V
CL
-
-
3
%
OUTPUT SECTION
Low Side Driver Source Current
I
LO1
V
LO
=Vcc
200
250
-
mA
Low Side Driver Sink Current
I
LO2
V
LO
=GND
400
500
-
mA
High Side Driver Source Current
I
HO1
V
HO
=V
B
200
250
-
mA
High Side Driver Sink Current
I
HO2
V
HO
=V
S
400
500
-
mA
High/Low Side Rising Time
tr
C
L
=1nF
-
90
150
ns
High/Low Side Falling Time
tf
C
L
= 1nF
-
40
100
ns
HIGH VOLTAGE SECTION
Offset Supply Leakage Current
I
LK
VB=VS=600V
-
-
10
A
Quiescent V
BS
Supply Current
I
QBS
-
10
48
90
A
FAN7532
5
Electrical Characteristics (Continued)
Vcc=V
BS
=14V, Ta=25C unless otherwise specified.
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
PROTECTION SECTION
OVP/OLP Comparator Threshold
Voltage
Vth_com
-
1.8
2
2.3
V
OLP Comparator Hysteresis Voltage
Vhy_com
-
0.6
0.92
1.3
V
Latch Mode Quiescent Current
Ilatch
-
-
0.35
0.45
mA
Thermal Shutdown Junction
Temperature
T
SD
-
-
150
-
C
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