SGS Thomson Microelectronics L6598D, L6598 Datasheet
HIGH VOLTAGE RESONANT CONTROLLER
■
HIGH VOLTAGE RAIL UP TO 600V
■
dV/dt IMMUNITY±50V/ns IN FULL
TEMPERATURE RANGE
■
DRIVER CURRENT CAPABILITY:
250mA SOURCE
450mA SINK
■
SWITCHING TIMES 80/40ns RISE/FALL WITH
1nF LOAD
■
CMOS SHUT DOWN INPUT
■
UNDER VOLTAGE LOCK OUT
■
SOFT START FREQUENCY SHIFTING
TIMING
■
SENSE OP AMP FOR CLOSED LOOP
CONTROL OR PROTECTION FEATURES
■ HIGH ACCURACY CURRENT CONTROLLED
OSCILLATOR
■
INTEGRATED BOOTSTRAP DIODE
■
CLAMPING ON Vs
■
SO16, DIP16 PACKAGES
DESCRIPTION
The L6598 is manufactured with the BCD OFF LINE
L6598
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 beneficial. 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 supply, reduces to a minimum the external parts needed
in the applications.
BLOCK DIAGRAM
OP
AMP
5
OPOUT
6
OPIN-
7
OPIN+
Ifmin
4
Rfmin
Rfstart
Cf
February 2000
Ifstart
2
3
VCO
V
S
+
-
V
REF
V
REF
12
CONTROL
LOGIC
UV
DETECTION
DEAD
TIME
Iss
BOOTSTRAP
1
Css
DRIVER
DRIVING
LOGIC
HVG
DRIVER
LEVEL
SHIFTER
LVG DRIVER
+
-
+
-
Vthe1
Vthe2
D98IN887A
16
15
14
Vs
11
10
8
9
V
BOOT
HVG
OUT
LVG
GND
EN1
EN2
H.V.
C
BOOT
LOAD
1/16
L6598
PIN CONNECTION
Css
Rfstart
Cf
Rfmin
OPOUT
OPIN-
OPIN+
1
2
3
4
5
6
7 GND
15
14
13
12
11
10
VBOOT16
HVG
OUT
N.C.
V
S
LVG
EN1 8 EN29
D98IN888
THERMAL DATA
Symbol Parameter SO16N DIP16 Unit
R
th j-amb
Thermal Resistance Junction to Ambient 120 80 °C/W
PIN FUNCTION
N. Name Function
1C
2R
3C
4R
5OP
6OP
7OP
8 EN1 Half Bridge Latched Enable
9 EN2 Half Bridge Unlatched Enable
10 GND Ground
11 LVG Low Side Driver Output
12 V
13 N.C. Not Connected
14 OUT High Side Driver Reference
15 HVG High Side Driver Output
16 V
Soft Start Timing Capacitor
SS
Soft Start Frequency Setting - Low Impedance VoltageSource - See also C
fstart
Oscillator Frequency Setting - see also R
f
Minimum Oscillation Frequency Setting - Low Impedance VoltageSource - See also C
fmin
Sense OP AMP Output - Low Impedance
out
Sense Op Amp Inverting Input - High Impedance
on-
Sense Op Amp Non Inverting Input - High Impedance
on+
Supply Volatge with Internal Zener Clamp
s
Bootstrapped Supply Voltage
boot
fmin,Rfstart
f
f
2/16
ABSOLUTEMAXIMUM RATINGS
Symbol Parameter Value Unit
L6598
I
S
V
LVG
V
OUT
V
HVG
V
BOOT
dV
BOOT/dt
dV
OUT/dt
V
ir
V
ic
V
EN1,VEN2
I
EN1,IEN2
V
opc
V
opd
V
opo
T
stg
Supply Current at Vcl(*) 25 mA
Low Side Output 14.6 V
High Side Reference -1 to V
High Side Output -1 to V
-18 V
BOOT
BOOT
V
Floating Supply Voltage 618 V
VBOOT pin Slew Rate (repetitive) ±50 V/ns
OUT pin Slew Rate (repetitive) ±50 V/ns
Forced Input Voltage (pins Rfmin, Rfstart) -0.3 to 5 V
Forced Input Volatge (pins Css, Cf) -0.3 to 5 V
Enable Input Voltage -0.3 to 5 V
Enable Input Current ±3mA
Sense Op Amp Common Mode Range -0.3 to 5 V
Sense Op Amp Differential Mode Range -5 to5 V
Sense Op Amp Output Voltage (forced) 4.6 V
Storage Temperature -40 to +150 °C
T
T
amb
(*) 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).
Junction Temperature -40 to +150 °C
j
Ambient Temperature -40 to +125 °C
RECOMMENDED OPERATINGCONDITIONS
Symbol Parameter Value Unit
V
V
out
V
boot
f
max
(*) If the condition Vboot - Vout < 18 is guaranteed, Vout can range from -3 to 580V.
Supply Voltage 10 to V
S
(*) High Side Reference -1 to Vboot-V
(*) Floating Supply Rail 500 V
Maximum Switching Frequency 400 kHz
cl
cl
V
V
3/16
L6598
ELECTRICAL CHARACTERISTCS
(VS=12V;V
BOOT-VOUT
=12V;T
amb
=25°C)
Symbol Pin Parameter Test Condition Min. Typ. Max. Unit
SUPPLYVOLTAGE
V
V
V
suvp
suvn
suvh
12 VSTurnOn Threshold 10 10.7 11.4 V
VSTurnOff Threshold 7.3 8 8.7 V
Supply Voltage Under Voltage
2.7 V
hysteresis
V
cl
I
su
I
q
Supply Voltage Clamping 14.6 15.6 16.6 V
Start Up Current Vs<V
Quiescent Current, fout =
Vs>V
suvn
suvp
2mA
250 µA
60kHz, no load
HIGH VOLTAGESECTION
I
bootleak
I
outleak
R
don
16 BOOT pin Leakage Current V
14 OUT pin Leakage Current V
16 Bootstrap Driver On Resistance 150 Ω
= 580V 5 mA
BOOT
= 562V 5 mA
OUT
HIGH/LOW SIDE DRIVERS
I
hvgso
15 High Side Driver Source Current V
HVG-VOUT
= 0 170 250 mA
I
hvgsi
I
lvgso
I
lvgsi
t
rise
t
fall
15,11 Low/High Side Output Rise Time C
High Side Driver Sink Current V
11 Low Side Driver Source Current V
Low Side Driver Sink Current V
HVG-VBOOT
LVG-GND
LVG - VS
load
C
load
= 0 300 450 mA
= 0 170 250 mA
= 0 300 450 mA
= 1nF 80 120 ns
= 1nF 40 80 ns
OSCILLATOR
DC 14 Output Duty Cycle 48 50 52 %
f
min
Minimum Output Oscillation
Cf= 470pF; R
= 50k 58.2 60 61.8 kHz
fmin
Frequency
f
start
V
ref
Soft Start Output Oscillation
Frequency
2, 4 Voltageto Current Converters
Cf= 470pF; R
=47k
R
fstart
fmin
= 50k;
114 120 126 kHz
22
Threshold
t
d
14 Dead Time between Low and
0.2 0.27 0.35
High Side Conduction
TIMING SECTION
k
ss
1 Soft Start Timing constant Css= 330nF 0.115 0.15 0.185 s/µF
s
µ
4/16
L6598
ELECTRICAL CHARACTERISTCS (continued)
Symbol Pin Parameter Test Condition Min. Typ. Max. Unit
SENSE OP AMP
l
IB
V
R
out
I
out-
I
out+
V
GBW Sense Op Amp Gain Band
G
COMPARATORS
V
the1
V
the2
t
pulse
6, 7 Input Bias Current 0.1 µA
io
ic
dc
Input Offset Voltage -10 10 mV
5 Output Resistance 200 300
Source Output Current V
Sink Output Current V
6,7 OP AMP input common mode
range
Width Product
DC Open Loop Gain 80 dB
8 Enabling Comparator Threshold 0.56 0.6 0.64 V
9 Enabling Comparator Threshold 1.05 1.2 1.35 V
8,9 Minimum Pulse lenght 200 ns
Figure 1. EN2 Timing Diagrams
= 4.5V 1 mA
out
= 0.2V 1 mA
out
-0.2 3 V
1MHz
Ω
V
S
f
OUT
EN2
V
Css
fstart
fmin
T
SS
T
SS
D98IN889
5/16
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