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L6386AD
High-voltage high and low side driver
Features

High voltage rail up to 600 V dV/dt immunity 50 V/nsec in full temperature range Driver current capability: - 400 mA source, - 650 mA sink Switching times 50/30 nsec rise/fall with 1nF load CMOS/TTL Schmitt trigger inputs with hysteresis and pull down Under voltage lock out on lower and upper driving section Integrated bootstrap diode Outputs in phase with inputs
SO-14
Description
The L6386AD is an high-voltage device, manufactured with the BCD "OFF-LINE" technology. It has a driver structure that enables to drive independent referenced Channel Power MOS or IGBT. The high-side (floating) section is enabled to work with voltage rail up to 600 V. The Logic Inputs are CMOS/TTL compatible for ease of interfacing with controlling devices.

Figure 1.
Block diagram
BOOTSTRAP DRIVER 14 VCC 4 UV DETECTION UV DETECTION H.V. R R HIN 3 LEVEL SHIFTER LOGIC S VCC HVG DRIVER 13 OUT 12 LVG LVG DRIVER LIN 1 VREF 9 PGND 8 5 DIAG TO LOAD HVG Vboot CBOOT
SD
2
SGND
7
July 2008
Rev 1
+ 6 CIN
D97IN520D
1/17
www.st.com 17
Contents
L6386AD
Contents
1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 1.2 1.3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 3
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 3.2 3.3 AC operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 DC operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
Bootstrap driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 CBOOT selection and charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 6 7 8
Typical characteristic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2/17
L6386AD
Electrical data
1
1.1
Electrical data
Absolute maximum ratings
Table 1.
Symbol Vout Vcc Vboot Vhvg Vlvg Vi Vdiag Vcin dVout/dt Ptot Tj Tstg Output voltage Supply voltage Floating supply voltage High-side gate output voltage Low-side gate output voltage Logic input voltage Open drain forced voltage Comparator input voltage Allowed output slew rate Total power dissipation (TJ = 85 C) Junction temperature Storage temperature
Absolute maximum ratings
Parameter Value -3 to Vboot - 18 - 0.3 to +18 -1 to 618 - 1 to Vboot -0.3 to Vcc +0.3 -0.3 to Vcc +0.3 -0.3 to Vcc +0.3 -0.3 to 10 V 50 750 150 -50 to 150 Unit V V V V V V V V V/ns mW C C
Note:
ESD immunity for pins 12, 13 and 14 is guaranteed up to 900V (Human Body Model)
1.2
Thermal data
Table 2.
Symbol Rth(JA)
Thermal data
Parameter Thermal Resistance Junction to ambient SO-14 165 Unit C/W
1.3
Recommended operating conditions
Table 3.
Symbol Vout VBS (2) fsw Vcc
TJ
Recommended operating conditions
Pin 12 14 Parameter Output voltage Floating supply voltage Switching frequency 4 Supply voltage Junction temperature -45 HVG,LVG load CL = 1 nF Test condition Min
(1) (1)
Typ
Max 580 17 400 17 125
Unit V V kHz V C
1. If the condition Vboot - Vout < 18 V is guaranteed, Vout can range from -3 to 580 V 2. VBS = Vboot - Vout
3/17
Pin connection
L6386AD
2
Pin connection
Figure 2. Pin connection (Top view)
LIN SD HIN VCC DIAG CIN SGND
1 2 3 4 5 6 7
D97IN521A
14 13 12 11 10 9 8
Vboot HVG OUT N.C. N.C. LVG PGND
Table 4.
N 1 2 3 4 5 6 7 8 9 10, 11 12 13 14
Pin description
Pin LIN SD(1) HIN VCC DIAG CIN SGND PGND LVG (1) N.C. OUT HVG
(1)
Type I I I Low-side driver logic input Shut down logic input High-side driver logic input Low voltage supply O I Open drain diagnostic output Comparator input Ground Power ground O Low-side driver output Not connected O O High-side driver floating driver High-side driver output Bootstrapped supply voltage
Function
Vboot
1. The circuit guarantees 0.3V maximum on the pin (@ Isink = 10 mA), with VCC >3V. This allows to omit the "bleeder" resistor connected between the gate and the source of the external MOSFET normally used to hold the pin low; the gate driver assures low impedance also in SD condition.
4/17
L6386AD
Electrical characteristics
3
3.1
Electrical characteristics
AC operation
Table 5.
Symbol ton toff tsd tr tf AC operation electrical characteristcs (VCC = 15 V; TJ = 25 C) Pin Parameter Test condition Min Typ 110 Vout = 0 V 110 105 CL = 1000 pF CL = 1000 pF 50 30 Max 150 150 150 ns ns Unit ns ns
High/low-side driver turn-on 1,3 vs propagation delay 9,13 High/low-side driver turn-off propagation delay 2 vs 9,13 9, 13 Fall time Shut down to high/low side propagation delay Rise time
3.2
DC operation
Table 6.
Symbol DC operation electrical characteristcs (VCC = 15 V; TJ = 25 C) Pin Parameter Test condition Min Typ Max Unit
Low supply voltage section Vccth1 Vccth2 Vcchys Iqccu Iqcc 4 Vcc UV turn on threshold Vcc UV turn off threshold Vcc UV hysteresis Undervoltage quiescent supply current Quiescent current Vcc 9 V Vcc = 15 V 9.1 7.9 9.6 8.3 1.3 200 250 320 10.1 8.8 V V V A A
Bootstrapped supply section Vbth1 Vbth2 Vbhys Iqboot Ilk RDS(on) 14 Vboot UV turn on threshold Vboot UV turn off threshold Vboot UV hysteresis Vboot quiescent current High voltage leakage current Bootstrap driver on resistance (1) HVG ON Vhvg = Vout = Vboot = 600 V Vcc 12.5 V; Vin = 0 V 125 8.5 7.2 9.5 8.2 1.3 200 10 10.5 9.2 V V V A A
5/17
Electrical characteristics Table 6.
Symbol
L6386AD
DC operation electrical characteristcs (continued)(VCC = 15 V; TJ = 25 C) Pin Parameter Test condition Min Typ Max Unit
Driving buffers section Iso Isi 9, 13 9, 13 High/low side source short circuit current High/low side sink short circuit current VIN = Vih (tp < 10 s) VIN = Vil (tp < 10 s) 300 500 400 650 mA mA
Logic inputs Vil Vih Iih Iil Low level logic voltage 1,2, High level logic voltage 3 High level logic input current V = 15 V IN Low level logic input current VIN = 0 V 3.6 50 70 1 1.5 V V A A
Sense comparator Vio Iio Vol Vref 6 2 Input offset voltage Input bias current Open drain low level output voltage Comparator reference voltage Vcin 0.5 Iod = -2.5 mA 0.46 0.50 -10 0.2 0.8 0.54 10 mV A V V
1. RDS(on) is tested in the following way:
( V CC - V CBOOT1 ) - ( V CC - V CBOOT2 ) R DSON = -----------------------------------------------------------------------------------------------------I 1 ( V CC ,V CBOOT1 ) - I 2 ( V CC ,V CBOOT2 )
where I1 is pin 14 current when VCBOOT = VCBOOT1, I2 when VCBOOT = VCBOOT2
6/17
L6386AD
Electrical characteristics
3.3
Timing diagram
Figure 3. Input/output timing diagram
HIN LIN
SD
HOUT LOUT
VREF VCIN
DIAG
Note: SD active condition is latched until next negative IN edge.
D97IN522A
7/17
Bootstrap driver
L6386AD
4
Bootstrap driver
A bootstrap circuitry is needed to supply the high voltage section. This function is normally accomplished by a high voltage fast recovery diode (Figure 4 a). In the L6386AD a patented integrated structure replaces the external diode. It is realized by a high voltage DMOS, driven synchronously with the low side driver (LVG), with in series a diode, as shown in Figure 4 b. An internal charge pump (Figure 4 b) provides the DMOS driving voltage. The diode connected in series to the DMOS has been added to avoid undesirable turn on of it.
4.1
CBOOT selection and charging
To choose the proper CBOOT value the external MOS can be seen as an equivalent capacitor. This capacitor CEXT is related to the MOS total gate charge:
Q gate C EXT = -------------V gate
The ratio between the capacitors CEXT and CBOOT is proportional to the cyclical voltage loss. It has to be:
CBOOT>>>CEXT
e.g.: if Qgate is 30 nC and Vgate is 10 V, CEXT is 3 nF. With CBOOT = 100 nF the drop would be 300 mV. If HVG has to be supplied for a long time, the CBOOT selection has to take into account also the leakage losses. e.g.: HVG steady state consumption is lower than 200 A, so if HVG TON is 5ms, CBOOT has to supply 1 C to CEXT. This charge on a 1 F capacitor means a voltage drop of 1 V. The internal bootstrap driver gives great advantages: the external fast recovery diode can be avoided (it usually has great leakage current). This structure can work only if VOUT is close to GND (or lower) and in the meanwhile the LVG is on. The charging time (Tcharge ) of the CBOOT is the time in which both conditions are fulfilled and it has to be long enough to charge the capacitor. The bootstrap driver introduces a voltage drop due to the DMOS RDS(on) (typical value: 125 ). At low frequency this drop can be neglected. Anyway increasing the frequency it must be taken in to account. The following equation is useful to compute the drop on the bootstrap DMOS:
Q gate V drop = I ch arg e R dson V drop = ------------------ R dson T ch arg e
where Qgate is the gate charge of the external power MOS, Rdson is the on resistance of the bootstrap DMOS, and Tcharge is the charging time of the bootstrap capacitor.
8/17
L6386AD
Bootstrap driver For example: using a power MOS with a total gate charge of 30 nC the drop on the bootstrap DMOS is about 1 V, if the Tcharge is 5 s. In fact:
30nC V drop = -------------- 125 0.8V 5s
Vdrop has to be taken into account when the voltage drop on CBOOT is calculated: if this drop is too high, or the circuit topology doesn't allow a sufficient charging time, an external diode can be used. Figure 4. Bootstrap driver
DBOOT
VS
VBOOT H.V. HVG
VS
VBOOT H.V. HVG
CBOOT VOUT TO LOAD
CBOOT VOUT TO LOAD
LVG
LVG
a
b
D99IN1056
9/17
Typical characteristic
L6386AD
5
Typical characteristic
Figure 5. Typical rise and fall times vs load capacitance
D99IN1054
Figure 6.
Iq (A) 104
Quiescent current vs supply voltage
D99IN1057
time (nsec) 250 200 Tr 150 Tf 100 50 0
103
102
10
0 1 2 3 4 5 C (nF) For both high and low side buffers @25C Tamb
0
2
4
6
8
10
12
14
16 VS(V)
Figure 7.
Turn on time vs temperature
Figure 8.
VBOOT UV turn on threshold vs temperature
250
15
@ Vcc = 15V
200
14 13 Vbth1 (V) 12 11 10 9 8
Typ.
@ Vcc = 15V
Ton (ns)
150 Typ. 100 50 0 -45 -25 0 25 50 Tj (C) 75 100 125
7 -45 -25 0 25 50 Tj (C) 75 100 125
Figure 9.
Turn Off time vs temperature Figure 10. VBOOT UV turn off threshold vs temperature
15
250
@ Vcc = 15V
200
14 Vbth2 (V) 13 12 11 10 9 8
Typ.
@ Vcc = 15V
Toff (ns)
150 Typ. 100 50 0 -45 -25 0 25 50 Tj (C) 75 100 125
7 -45 -25 0 25 50 Tj (C) 75 100 125
10/17
L6386AD Figure 11. Shutdown time vs temperature
250
Typical characteristic Figure 12. VBOOT UV hysteresis
3
@ Vcc = 15V
200 150 100 50 0 -45 -25 0 25 50 Tj (C) 75 100 125
Typ.
@ Vcc = 15V
2.5 Vbhys (V) Typ.
tsd (ns0
2
1.5
1 -45 -25 0 25 50 Tj (C) 75 100 125
Figure 13. VCC UV turn on threshold vs temperature
15 14 Vccth1(V) 13 12 11 10 9 -45 -25 0 25 50 Tj (C) 75 100 125 Typ.
Figure 14. Output source current vs temperature
1000
@ Vcc = 15V
800 current (mA) 600 Typ. 400 200 0 -45 -25 0 25 50 Tj (C) 75 100 125
Figure 15. VCC UV turn off threshold vs temperature
12 11 10 Typ. 9 8 7 -45
Figure 16. Output sink current vs temperature
1000
@ Vcc = 15V
800 current (mA) 600 400 200 0 -45
Typ.
Vccth2(V)
-25
0
25
50
75
100
125
-25
0
Tj (C)
25 50 Tj (C)
75
100
125
11/17
Typical characteristic
L6386AD
Figure 17. VCC UV hysteresis vs temperature
3
2.5 Vcchys (V)
Typ.
2
1.5
1 -45 -25 0 25 50 Tj (C) 75 100 125
12/17
L6386AD
Package mechanical data
6
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com
13/17
Package mechanical data Figure 18. SO-14 mechanical data and package dimensions
mm DIM. MIN. A A1 A2 B C D (1) E e H h L k ddd 5.8 0.25 0.40 1.35 0.10 1.10 0.33 0.19 8.55 3.80 1.27 6.20 0.50 1.27 0.228 0.01 0.016 TYP. MAX. 1.75 0.30 1.65 0.51 0.25 8.75 4.0 MIN. 0.053 0.004 0.043 0.013 0.007 0.337 0.150 0.050 0.244 0.02 0.050 TYP. MAX. 0.069 0.012 0.065 0.020 0.01 0.344 0.157 inch
L6386AD
OUTLINE AND MECHANICAL DATA
0 (min.), 8 (max.) 0.10 0.004
(1) "D" dimension does not include mold flash, protusions or gate burrs. Mold flash, protusions or gate burrs shall not exceed 0.15mm per side.
SO-14
0016019 D
14/17
L6386AD
Order codes
7
Order codes
Table 7. Order codes
Order codes L6386AD L6386AD013TR Package SO-14 SO-14 Packaging Tube Tape and reel
15/17
Revision history
L6386AD
8
Revision history
Table 8.
Date 14-Jul-2008
Document revision history
Revision 1 First release Changes
16/17
L6386AD
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