L6571 [STMICROELECTRONICS]
High voltage half bridge driver with oscillator;
| 型号： | L6571 |
| 厂家： | 
ST |
| 描述： | High voltage half bridge driver with oscillator |
| 文件： | 总12页 (文件大小：234K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
L6571
High voltage half bridge driver with oscillator
Features
■ High voltage rail up to 600 V
■ BCD off line technology
■ 15.6 V Zener clamp on Vs
■ Driver current capability:
– Sink current = 270 mA
– Source current = 170 mA
DIP-8
SO8
can be programmed using external resistor and
capacitor.
■ Very low start up current: 150 mA
■ Undervoltage lockout with hysteresis
■ Programmable oscillator frequency
The internal circuitry of the device allows it to be
driven also by external logic signal.
The output drivers are designed to drive external
nchannel power MOSFET and IGBT. The internal
logic assures a dead time to avoid cross-
conduction of the power devices.
■ Dead time 1.25 μs (L6571A) or 0.72 μs
(L6571B)
■ dV/dt immunity up to 50 V/ns
■ ESD protection
Two version are available: L6571A and L6571B.
They differ in the internal dead time: 1.25μs and
0.72 μs (typ.)
Description
The device is a high voltage half bridge driver with
built in oscillator. The frequency of the oscillator
Figure 1.
Block diagram
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January 2010
Doc ID 4946 Rev 6
1/12
www.st.com
12
Contents
L6571A - L6571B
Contents
1
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
1.2
1.3
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
3
4
5
6
7
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Oscillator frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Order information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2/12
Doc ID 4946 Rev 6
L6571A - L6571B
Maximum ratings
1
Maximum ratings
1.1
Absolute maximum ratings
Table 1.
Symbol
Absolute maximum ratings
Parameter
Value
Unit
(1)
IS
Supply current
25
18
mA
V
VCF
VLVG
Oscillator resistor voltage
Low side switch gate output
High side switch source output
High side switch gate output
Floating supply voltage
14.6
V
VOUT
VHVG
VBOOT
-1 to VBOOT -18
-1 to VBOOT
618
V
V
V
VBOOT/OUT Floating supply vs OUT voltage
18
V
dVBOOT/dt
dVOUT/dt
Tstg
VBOOT slew rate (Repetitive)
VOUT slew rate (Repetitive)
Storage temperature
50
V/ns
V/ns
°C
°C
°C
50
-40 to 150
-40 to 150
-40 to 125
TJ
Junction temperature
Tamb
Ambient temperature (Operative)
1. The device has an internal zener clamp between GND and VS (typical 15.6 V).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)
1.2
Thermal data
Table 2.
Symbol
RthJA
Thermal data
Parameter
Thermal resistance junction-ambient max
MDIP8
SO8
Unit
100
150
°C/W
1.3
Recommended operating conditions
Table 3.
Symbol
Recommended operating conditions
Parameter
Min.
Max.
Unit
VS
Supply voltage
10
-
VCL
500
V
V
VBOOT
Floating supply voltage
VBOOT
-VCL
VOUT
fout
High side switch source output
Oscillation frequency
-1
V
200
kHz
Doc ID 4946 Rev 6
3/12
Pin connection
L6571A - L6571B
2
Pin connection
Figure 2.
Pin connection
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Table 4.
N°
Pin description
Pin
Description
Supply input voltage with internal clamp [typ. 15.6V]
1
VS
Oscillator timing resistor pin. A buffer set alternatively to VS and GND can provide
current to the external resistor RF connected between pin 2 and 3. Alternatively,
the signal on pin 2 can be used also to drive another IC (i.e. another L6569/71 to
drive a full H-bridge)
2
RF
CF
Oscillator timing capacitor pin. A capacitor connected between this pin and GND
fixes (together with RF) the oscillating frequency Alternatively an external logic
signal can be applied to the pin to drive the IC.
3
4
5
6
7
8
GND Ground
Low side driver output. The output stage can deliver 170mA source and 270mA
LVG
sink [typ.values].
OUT Upper driver floating reference
High side driver output. The output stage can deliver 170mA source and 270mA
sink [typ.values].
HVG
BOOT Bootstrap voltage supply. It is the upper driver floating supply.
4/12
Doc ID 4946 Rev 6
L6571A - L6571B
Electrical data
3
Electrical data
V = 12V; V
- V
= 12V; T = 25 °C; unless otherwise specified.
S
BOOT
OUT j
Table 5.
Electrical characteristcs
Parameter
VS turn on threshold
Symbol Pin
Test Condition
Min.
Typ.
Max.
Unit
VSUVP
VSUVN
VSUVH
VCL
1
8.3
7.3
9
8
9.7
8.7
1.3
16.6
250
700
5
V
V
VS turn off threshold
VS hysteresis
0.7
1
V
VS clamping voltage
IS = 5 mA
14.6
15.6
150
500
V
ISU
Start up current
VS < VSUVN
VS > VSUVP
VBOOT = 580V
VOUT = 562V
VHVG = 6V
VHVG = 6V
VLVG = 6V
μA
μA
μA
μA
mA
mA
mA
mA
V
Iq
Quiescent current
IBOOTLK
IOUTLK
IHVG SO
IHVG SI
ILVG SO
ILVG SI
VRFON
VRF OFF
VCFU
8
6
7
Leakage current BOOT pin vs GND
Leakage current OUT pin vs GND
High side driver source current
High side driver sink current
Low side driver source current
Low side driver sink current
RF high level output voltage
RF low level output voltage
CF upper threshold
5
110
190
175
275
175
275
5
2
3
110
VLVG = 6V
190
IRF =1mA
VS -0.05
50
VS -0.2
200
IRF = -1mA
mV
V
7.7
8
4
8.2
VCFL
CF lower threshold
3.80
4.3
V
L6571A
L6571B
0.85
0.50
1.25
0.72
1.65
0.94
μs
μs
td
Internal dead time
Duty cycle, ratio between dead
Time + conduction time of high
Side and low side drivers
DC
0.45
57
0.5
0.55
IAVE
fout
1
6
Average current from Vs
Oscillation frequency
No Load, fs = 60KHz
RT = 12K; CT = 1nF
1.2
60
1.5
63
mA
kHz
Doc ID 4946 Rev 6
5/12
Oscillator frequency
L6571A - L6571B
4
Oscillator frequency
The frequency of the internal oscillator can be programmed using external resistor and
capacitor.
The nominal oscillator frequency can be calculated using the following equation:
Equation 1
Where R and C are the external resistor and capacitor.
F
F
The device can be driven in "shut down" condition keeping the C pin close to GND, but
F
some cares have to be taken:
1. When CF is to GND the high side driver is off and the low side is on
2. The forced discharge of the oscillator capacitor C must not be shorter than 1us: a
F
simple way to do this is to limit the current discharge with a resistive path imposing
R · C > 1 μs (see fig.1)
F
Figure 3.
Fault signal
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Waveforms
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6/12
Doc ID 4946 Rev 6
L6571A - L6571B
Oscillator frequency
Figure 5.
Typical dead time vs. temperature Figure 6.
dependency (L6571A)
Typical rise and fall times vs. load
capacitance
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Figure 7.
Typical frequency vs temperature
dependency
Figure 8.
Quiescent current vs. supply
voltage
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Figure 9.
Typical and theoretical oscillator
frequency vs resistor value
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Doc ID 4946 Rev 6
7/12
Package mechanical data
L6571A - L6571B
5
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
®
®
ECOPACK packages, depending on their level of environmental compliance. ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
®
ECOPACK is an ST trademark.
Figure 10. DIP-8 mechanical data
mm
inch
DIM.
OUTLINE AND
MECHANICAL DATA
MIN.
TYP. MAX. MIN.
3.32
TYP. MAX.
0.131
A
a1
B
0.51
1.15
0.020
1.65 0.045
0.55 0.014
0.304 0.008
10.92
0.065
0.022
b
0.356
0.204
b1
D
E
0.012
0.430
7.95
9.75 0.313
2.54
0.384
e
0.100
e3
e4
F
7.62
0.300
7.62
0.300
6.6
0.260
I
5.08
0.200
L
3.18
3.81 0.125
1.52
0.150
DIP-8
Z
0.060
8/12
Doc ID 4946 Rev 6
L6571A - L6571B
Package mechanical data
inch
Table 1. SO-8 mechanical data
mm.
Dim.
Min
Typ
Max
Min
Typ
Max
A
1.35
1.75
0.053
0.069
A1
A2
B
0.10
1.10
0.33
0.19
4.80
0.25
1.65
0.51
0.25
5.00
0.004
0.043
0.013
0.007
0.189
0.010
0.065
0.020
0.010
0.197
C
(1)
D
E
e
3.80
4.00
0.15
0.157
1.27
0.050
H
5.80
0.25
0.40
6.20
0.50
1.27
0.228
0.010
0.016
0.244
0.020
0.050
h
L
k
0° (min.), 8° (max.)
0.10
ddd
0.004
1. Dimensions D does not include mold flash, protru-sions or gate burrs. Mold flash, potrusions or gate burrs
shall not exceed 0.15mm (.006inch) in total (both side).
Figure 11. Package dimensions
Doc ID 4946 Rev 6
9/12
Order information
L6571A - L6571B
6
Order information
Table 6.
Ordering information
Order codes
Package
Packaging
L6571A
L6571AD
DIP-8
Tube
SO8
DIP-8
SO8
L6571AD013TR
L6571B
Tape and reel
Tube
L6571BD
L6571BD013TR
Tape and reel
10/12
Doc ID 4946 Rev 6
L6571A - L6571B
Revision history
7
Revision history
Table 7.
Date
Document revision history
Revision
Changes
14-Jan-2004
15-Jan-2010
5
6
No history because migration
Updated Table 6 on page 10
Doc ID 4946 Rev 6
11/12
L6571A - L6571B
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