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L6571A Datasheet(PDF) 3 Page - STMicroelectronics

Part No. L6571A
Description  HIGH VOLTAGE HALF BRIDGE DRIVER WITH OSCILLATOR
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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L6571A Datasheet(HTML) 3 Page - STMicroelectronics

   
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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:
fOSC
=
1
2
⋅ RF CF
In 2
=
1
1.3863
RF ⋅ CF
where RF and CF are the external resistor and ca-
pacitor
ELECTRICAL CHARACTERISTICS (VS =12V; VBOOT -VOUT =12V; Tj =25
°C; unlessotherwise specified.)
Symbol
Pin
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VSUVP
1VS Turn On Threshold
8.3
9
9.7
V
VSUVN
VS Turn Off Threshold
7.3
8
8.7
V
VSUVH
VS Hysteresis
0.7
1
1.3
V
VCL
VS Clamping Voltage
IS = 5mA
14.6
15.6
16.6
V
ISU
Start Up Current
VS <VSUVN
150
250
µA
Iq
Quiescent Current
VS >VSUVP
500
700
µA
IBOOTLK
8
Leakage Current BOOT pin vs
GND
VBOOT = 580V
5
µA
IOUTLK
6
Leakage Current OUT pin vs GND
VOUT = 562V
5
µA
IHVG SO
7
High Side Driver Source Current
VHVG = 6V
110
175
mA
IHVG SI
High Side Driver Sink Current
VHVG = 6V
190
275
mA
ILVG SO
5
Low Side Driver Source Current
VLVG = 6V
110
175
mA
ILVG SI
Low Side Driver Sink Current
VLVG = 6V
190
275
mA
VRFON
2
RF High Level Output Voltage
IRF = 1mA
VS -0.05
VS -0.2
V
VRF OFF
RF Low Level Output Voltage
IRF = -1mA
50
200
mV
VCFU
3
CF Upper Threshold
7.7
7.95
8.2
V
VCFL
CF Lower Threshold
3.80
4.05
4.3
V
td
Internal Dead Time
L6571A
L6571B
0.85
0.50
1.25
0.72
1.65
0.94
µs
µs
DC
Duty Cycle, Ratio Between
Dead Time + Conduction Time
of High Side and Low Side
Drivers
0.45
0.5
0.55
IAVE
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
TC
VS
VCF
LVG
D96IN434
V
SUVP
Figure 2: WAVEFORMS
L6571A - L6571B
3/7


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