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Электронный компонент: L6571BD

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L6571A
L6571B
HIGH VOLTAGE HALF BRIDGE
DRIVER WITH OSCILLATOR
TECHNOLOGY: BCD "OFF-LINE"
FLOATING SUPPLY VOLTAGE UP TO 600V
GND REFERRED SUPPLY VOLTAGE UP TO
18V
DRIVER CURRENT CAPABILITY:
- SINK CURRENT = 270mA
- SOURCE CURRENT = 170mA
VERY LOW START UP CURRENT: 150
A
VERY LOW OPERATING CURRENT: <2mA
UNDERVOLTAGE LOCKOUT
PROGRAMMABLE OSCILLATOR
FREQUENCY
dV/dt IMMUNITY UP TO
50V/ns
DESCRIPTION
The device is a high voltage half bridge driver
with built-in oscillator. The frequency of the oscil-
lator can be programmed using external resistor
and capacitor.
The output drivers are designed to drive external
n-channel power MOSFET and IGBT. The inter-
nal logic assures a minimum dead time to avoid
cross-conduction of the power devices.
June 2000
R
F
C
F
LOGIC
BIAS
REGULATOR
COMP
COMP
LEVEL
SHIFTER
BUFFER
R
F
C
F
GND
HIGH
SIDE
DRIVER
LOW SIDE
DRIVER
HVG
LVG
OUT
BOOT
V
S
R
HV
C
VS
C
BOOT
H.V.
LOAD
D96IN433
V
S
V
S
BLOCK DIAGRAM
ORDERING NUMBERS:
L6571A
L6571AD
L6571B
L6571BD
Minidip
SO8
1/7
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
I
S
(*)
Supply Current
25
mA
V
CF
Oscillator Resistor Voltage
18
V
V
LVG
Low Side Switch Gate Output
14.6
V
V
OUT
High Side Switch Source Output
-1 to V
BOOT
- 18
V
V
HVG
High Side Switch Gate Output
-1 to V
BOOT
V
V
BOOT
Floating Supply Voltage
618
V
V
BOOT/OUT
Floating Supply vs OUT Voltage
18
V
dV
BOOT
/dt
V
BOOT
Slew Rate (Repetitive)
50
V/ns
dV
OUT
/dt
V
OUT
Slew Rate (Repetitive)
50
V/ns
T
stg
Storage Temperature
-40 to 150
C
T
j
Junction Temperature
-40 to 150
C
T
amb
Ambient Temperature (Operative)
-40 to 125
C
(*)
The device has an internal zener clamp between GND and VS (typical 15.6V).
Therefore the circuit should not be driven by a DC low impedance power source.
Note: ESD immunity for pins 6, 7 and 8 is guaranteed up to 900 V (Human Body Model)
V
S
R
F
C
F
GND
1
3
2
4
LVG
OUT
HVG
BOOT
8
7
6
5
D94IN059
PIN CONNECTION
THERMAL DATA
Symbol
Parameter
Minidip
SO8
Unit
R
th j-amb
Thermal Resistance Junction-Ambient
Max
100
150
C/W
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min.
Max.
Unit
V
S
Supply Voltage
10
V
CL
V
V
BOOT
Floating Supply Voltage
-
500
V
V
OUT
High Side Switch Source Output
-1
V
BOOT
-V
CL
V
f
out
Oscillation Frequency
200
kHz
L6571A - L6571B
2/7
OSCILLATOR FREQUENCY
The frequency of the internal oscillator can be
programmed using external resistor and capacitor.
The nominal oscillator frequency can be calcu-
lated using the following equation:
f
OSC
=
1
2
R
F
C
F
In 2
=
1
1.3863
R
F
C
F
where R
F
and C
F
are the external resistor and ca-
pacitor
ELECTRICAL CHARACTERISTICS (V
S
= 12V; V
BOOT
- V
OUT
= 12V; T
j
= 25
C; unless otherwise specified.)
Symbol
Pin
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
SUVP
1
V
S
Turn On Threshold
8.3
9
9.7
V
V
SUVN
V
S
Turn Off Threshold
7.3
8
8.7
V
V
SUVH
V
S
Hysteresis
0.7
1
1.3
V
V
CL
V
S
Clamping Voltage
I
S
= 5mA
14.6
15.6
16.6
V
I
SU
Start Up Current
V
S
< V
SUVN
150
250
A
I
q
Quiescent Current
V
S
> V
SUVP
500
700
A
I
BOOTLK
8
Leakage Current BOOT pin vs
GND
V
BOOT
= 580V
5
A
I
OUTLK
6
Leakage Current OUT pin vs GND
V
OUT
= 562V
5
A
I
HVG SO
7
High Side Driver Source Current
V
HVG
= 6V
110
175
mA
I
HVG SI
High Side Driver Sink Current
V
HVG
= 6V
190
275
mA
I
LVG SO
5
Low Side Driver Source Current
V
LVG
= 6V
110
175
mA
I
LVG SI
Low Side Driver Sink Current
V
LVG
= 6V
190
275
mA
V
RFON
2
RF High Level Output Voltage
I
RF
= 1mA
V
S
-0.05
V
S
-0.2
V
V
RF OFF
RF Low Level Output Voltage
I
RF
= -1mA
50
200
mV
V
CFU
3
CF Upper Threshold
7.7
7.95
8.2
V
V
CFL
CF Lower Threshold
3.80
4.05
4.3
V
t
d
Internal Dead Time
L6571A
L6571B
0.85
0.50
1.25
0.72
1.65
0.94
s
s
D
C
Duty Cycle, Ratio Between
Dead Time + Conduction Time
of High Side and Low Side
Drivers
0.45
0.5
0.55
I
AVE
1
Average Current from Vs
No Load, fs = 60KHz
1.2
1.5
mA
fout
6
Oscillation Frequency
RT = 12k
CT = 1nF
57
60
63
kHz
T1
T
C
V
S
V
CF
LVG
D96IN434
V
SUVP
Figure 2: WAVEFORMS
L6571A - L6571B
3/7
-50
0
50
100
150
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
Temperature [C]
Dead time [
sec]
D96IN378A
Figure 3: Typical Dead Time vs. Temperature
Dependency (L6571A).
-50
-25
0
25
50
75
100
125
55
56
57
58
59
60
61
62
63
64
65
Temperature [C]
Frequency [KHz]
D96IN379A
Figure 4: Typical Frequency vs Temperature
Dependency
5
6
7
8 9 10
15
20
30
40
50
20
30
50
60
70
80
90
100
150
Resistor Value (Kohm)
f (KHz)
Theoretical
C=1nF
C=560pF
C=330pF
D96IN380
Figure 5: Typical and Theoretical Oscillator
Frequency vs Resistor Value
For both high and low side buffers @25
C Tamb
0
1
2
3
4
5
6
0
50
100
150
200
250
300
C [nF]
time [nsec]
Tr
Tf
D96IN417
Figure 8: Typical Rise and Fall Times vs. Load
Capacitance
0
2
4
6
8
10
12
14 V
S
(V)
10
10
2
10
3
10
4
Iq (
A)
D96IN418
Figure 9: Quiescent Current vs. Supply Voltage.
L6571A - L6571B
4/7
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
1.75
0.069
a1
0.1
0.25
0.004
0.010
a2
1.65
0.065
a3
0.65
0.85
0.026
0.033
b
0.35
0.48
0.014
0.019
b1
0.19
0.25
0.007
0.010
C
0.25
0.5
0.010
0.020
c1
45
(typ.)
D (1)
4.8
5.0
0.189
0.197
E
5.8
6.2
0.228
0.244
e
1.27
0.050
e3
3.81
0.150
F (1)
3.8
4.0
0.15
0.157
L
0.4
1.27
0.016
0.050
M
0.6
0.024
S
8
(max.)
(1) D and F do not include mold flash or protrusions. Mold flash or
potrusions shall not exceed 0.15mm (.006inch).
SO8
OUTLINE AND
MECHANICAL DATA
L6571A - L6571B
5/7
Minidip
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
3.32
0.131
a1
0.51
0.020
B
1.15
1.65
0.045
0.065
b
0.356
0.55
0.014
0.022
b1
0.204
0.304
0.008
0.012
D
10.92
0.430
E
7.95
9.75
0.313
0.384
e
2.54
0.100
e3
7.62
0.300
e4
7.62
0.300
F
6.6
0.260
I
5.08
0.200
L
3.18
3.81
0.125
0.150
Z
1.52
0.060
OUTLINE AND
MECHANICAL DATA
L6571A - L6571B
6/7
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L6571A - L6571B
7/7