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STMicroelectronics
STMicroelectronics

L6598D Datasheet

HIGH VOLTAGE RESONANT CONTROLLER


L6598D Datasheet Preview


L6598
HIGH VOLTAGE RESONANT CONTROLLER
s HIGH VOLTAGE RAIL UP TO 600V
s dV/dt IMMUNITY ±50V/ns IN FULL
TEMPERATURE RANGE
s DRIVER CURRENT CAPABILITY:
250mA SOURCE
450mA SINK
s SWITCHING TIMES 80/40ns RISE/FALL WITH
1nF LOAD
s CMOS SHUT DOWN INPUT
s UNDER VOLTAGE LOCK OUT
s SOFT START FREQUENCY SHIFTING
TIMING
s SENSE OP AMP FOR CLOSED LOOP
CONTROL OR PROTECTION FEATURES
s HIGH ACCURACY CURRENT CONTROLLED
OSCILLATOR
s INTEGRATED BOOTSTRAP DIODE
s CLAMPING ON Vs
s SO16, DIP16 PACKAGES
DESCRIPTION
The L6598 is manufactured with the BCD OFF LINE
BLOCK DIAGRAM
DIP16
SO16N
ORDERING NUMBERS:
L6598
L6598D
technology, able to ensure voltage ratings up to
600V, making it perfectly suited for AC/DC Adapters
and wherever a Resonant Topology can be benefi-
cial. The device is intended to drive two Power MOS,
in the classical Half Bridge Topology. A dedicated
Timing Section allows the designer to set Soft Start
Time, Soft Start and Minimum Frequency. An Error
Amplifier, together with the two Enable inputs, are
made available. In addition, the integrated Bootstrap
Diode and the Zener Clamping on low voltage sup-
ply, reduces to a minimum the external parts needed
in the applications.
OPOUT
OPIN-
OPIN+
5
6
7
OP AMP
+
-
Rfmin
Rfstart
Ifmin
4
Ifstart
2
VREF
VREF
3
VCO
Cf
VS
12
UV
DETECTION
DEAD
TIME
CONTROL
LOGIC
Iss
BOOTSTRAP
DRIVER
DRIVING
LOGIC
H.V.
16 VBOOT
HVG
DRIVER
LEVEL
SHIFTER
LVG DRIVER
Vthe1
+
-
Vthe2
+
-
15 HVG
14
OUT
Vs
11 LVG
10
GND
8
EN1
9
EN2
CBOOT
LOAD
1
Css
D98IN887A
February 2000
1/16
Page 1

L6598
PIN CONNECTION
Css
Rfstart
Cf
Rfmin
OPOUT
OPIN-
OPIN+
EN1
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
D98IN888
VBOOT
HVG
OUT
N.C.
VS
LVG
GND
EN2
THERMAL DATA
Symbol
Parameter
Rth j-amb Thermal Resistance Junction to Ambient
SO16N
120
DIP16
80
Unit
°C/W
PIN FUNCTION
N. Name
1 CSS
2 Rfstart
3 Cf
4 Rfmin
5 OPout
6 OPon-
7 OPon+
8 EN1
9 EN2
10 GND
11 LVG
12 Vs
13 N.C.
14 OUT
15 HVG
16 Vboot
Funct ion
Soft Start Timing Capacitor
Soft Start Frequency Setting - Low Impedance Voltage Source - See also Cf
Oscillator Frequency Setting - see also Rfmin, Rfstart
Minimum Oscillation Frequency Setting - Low Impedance Voltage Source - See also Cf
Sense OP AMP Output - Low Impedance
Sense Op Amp Inverting Input - High Impedance
Sense Op Amp Non Inverting Input - High Impedance
Half Bridge Latched Enable
Half Bridge Unlatched Enable
Ground
Low Side Driver Output
Supply Volatge with Internal Zener Clamp
Not Connected
High Side Driver Reference
High Side Driver Output
Bootstrapped Supply Voltage
2/16
Page 2

L6598
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
IS Supply Current at Vcl (*)
25 mA
VLVG Low Side Output
14.6 V
VOUT High Side Reference
-1 to VBOOT -18
V
VHVG High Side Output
-1 to VBOOT
V
VBOOT Floating Supply Voltage
dVBOOT/dt VBOOT pin Slew Rate (repetitive)
618 V
±50 V/ns
dVOUT/dt OUT pin Slew Rate (repetitive)
±50 V/ns
Vir Forced Input Voltage (pins Rfmin, Rfstart)
-0.3 to 5
V
Vic Forced Input Volatge (pins Css, Cf)
-0.3 to 5
V
VEN1, VEN2 Enable Input Voltage
IEN1, IEN2 Enable Input Current
Vopc
Sense Op Amp Common Mode Range
-0.3 to 5
±3
-0.3 to 5
V
mA
V
Vopd
Sense Op Amp Differential Mode Range
-5 to 5
V
Vopo
Tstg
Sense Op Amp Output Voltage (forced)
Storage Temperature
4.6
-40 to +150
V
°C
Tj Junction Temperature
-40 to +150
°C
Tamb
Ambient Temperature
-40 to +125
°C
(*) The device is provided of an internal Clamping Zener between GND and the Vs pin, It must not be supplied by a low impedance voltage
source.
Note : ESD immunity for pins 14, 15 and 16 is guaranteed up to 900 (Human Body Model).
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
VS Supply Voltage
Vout (*) High Side Reference
Vboot (*) Floating Supply Rail
fmax Maximum Switching Frequency
(*) If the condition Vboot - Vout < 18 is guaranteed, Vout can range from -3 to 580V.
Value
10 to Vcl
-1 to Vboot-Vcl
500
400
Unit
V
V
V
kHz
3/16
Page 3

L6598
ELECTRICAL CHARACTERISTCS (VS = 12V; VBOOT - VOUT = 12V; Tamb = 25°C)
Symbol Pin
Parameter
Test Condition
Min.
SUPPLY VOLTAGE
Vsuvp
12 VS Turn On Threshold
10
Vsuvn
VS Turn Off Threshold
7.3
Vsuvh
Supply Voltage Under Voltage
hysteresis
Vcl Supply Voltage Clamping
14.6
Isu Start Up Current
Vs < Vsuvn
Iq
Quiescent Current, fout =
Vs > Vsuvp
60kHz, no load
HIGH VOLTAGE SECTION
Ibootleak 16 BOOT pin Leakage Current
VBOOT = 580V
Ioutleak 14 OUT pin Leakage Current
VOUT = 562V
Rdon
16 Bootstrap Driver On Resistance
HIGH/LOW SIDE DRIVERS
Ihvgso
15 High Side Driver Source Current VHVG-VOUT = 0
170
Ihvgsi
High Side Driver Sink Current VHVG-VBOOT = 0
300
Ilvgso
Ilvgsi
trise
11 Low Side Driver Source Current VLVG-GND = 0
Low Side Driver Sink Current
VLVG - VS = 0
15,11 Low/High Side Output Rise Time Cload = 1nF
170
300
tfall Cload = 1nF
OSCILL ATOR
DC 14 Output Duty Cycle
48
fmin
Minimum Output Oscillation
Cf = 470pF; Rfmin = 50k
58.2
Frequency
fstart
Soft Start Output Oscillation
Cf = 470pF; Rfmin = 50k;
114
Frequency
Rfstart = 47k
Vref 2, 4 Voltage to Current Converters
Threshold
td 14 Dead Time between Low and
High Side Conduction
0.2
TIMING SECTION
kss 1 Soft Start Timing constant
Css = 330nF
0.115
Typ.
10.7
8
2.7
15.6
2
150
250
450
250
450
80
40
50
60
120
2
0.27
0.15
Max.
11.4
8.7
16.6
250
5
5
120
80
52
61.8
126
0.35
0.185
Unit
V
V
V
V
µA
mA
mA
mA
mA
mA
mA
mA
ns
ns
%
kHz
kHz
2
µs
s/µF
4/16
Page 4
Part Number L6598D
Manufactur STMicroelectronics
Description HIGH VOLTAGE RESONANT CONTROLLER
Total Page 16 Pages
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