May 2008 Rev 2 1/14
1
L9856
High voltage high-side driver
Features
■High voltage rail up to 160 V
■dV/dt immunity ±50 V/nsec in full temperature
range
■Driver current capability:
500 mA source,
500 mA sink
■Switching times 100 ns rise/fall with 2.5 nF load
■CMOS/TTL Schmitt trigger inputs with
hysteresis
■Under voltage lock out
■Clamping on V
CC
■Loading circuit for external Bootstrap capacitor
■Inverting input
■Reset circuitry
■SO-8 package
Description
The L9856 is an high voltage device,
manufactured with the BCD "OFF-LINE"
technology.
It has the capability of driving N-Channel Power
MOS transistors. The upper (floating) section is
enabled to work with voltage rail up to 160 V. The
logic Inputs are CMOS/TTL compatible for ease
of interfacing with controlling devices.
SO-8
Table 1. Device summary
Order code Operating temp range, °CPackage Packing
L9856 -40 to +125 SO-8 Tube
L9856TR -40 to +125 SO-8 Tape and Reel
www.st.com
Contents L9856
2/14
Contents
1 Block diagram andpin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.5 Logic table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
L9856 List of tables
3/14
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 4. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 5. Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 6. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 7. Logic table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 8. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
List of figures L9856
4/14
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Input/output timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 4. Reset timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 5. SO-8 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
L9856 Block diagram andpin description
5/14
1 Block diagram andpin description
1.1 Block diagram
Figure 1. Block diagram
1.2 Pin description
Figure 2. Pin connection (top view)
Logic
Pulse Filter
Level Shifter
"ON"
Level Shifter
"OFF"
Undervoltage
RESET
VB to VS
Pulse Filter
FLIP FLOP
Break before
Make
Undervoltage
RESET VCC
to GND
Delay
Recharge path
V
CC
V
B
V
S
H
O
RES-
IN-
GND
Table 2. Pin function
Pin # Pin name Description
1V
CC Driver supply, typical 5V
2 IN- Driver control signal input (negative logic)
3 GND Ground
4 RESET- Driver enable signal input (negative logic)
5V
SMOSFET source connection
6 NC No connection (no bondwire)
7H
OMOSFET gate connection
8V
BDriver output stage supply
V
CC
IN-
GND
RESET-
1
3
2
4V
S
NC
H
O
V
B
8
7
6
5
Electrical specifications L9856
6/14
2 Electrical specifications
2.1 Thermal data
2.2 Absolute maximum ratings
Absolute maximum ratings indicate sustained limits beyond which damage to the device may
occur. All voltage parameters are absolute voltages referenced to GND, all currents are defined
positive into any lead. An operation above the absolute maximum limit is not implied and can
damage the part.
Table 3. Thermal data
Symbol Parameter Value Unit
R
th(j-amb)
Thermal resistance junction to ambient Max. 150 °C/W
Table 4. Absolute maximum ratings
Symbol Parameter
Value
Units
Min. Max.
VBS High side floating supply voltage. -0.3 20 V
VB
High side driver output stage voltage
neg.
transient: 0.5 ms, external MOSFET off.
-5 166 V
VS
High side floating supply offset voltage neg.
transient 0.1 µs, repetitive pulse over lifetime at
every switching event.
-8 150 V
VHO Output voltage gate connection. VS - 0.3 VB + 0.3 V
VCC Supply voltage. -0.3 20 V
VIN Input voltage. -0.3 VCC + 0.3 V
IIN
Input injection current. Full function, no latch-
up; (guaranteed by design). Test at 5 V and 7 V
on Eng. Samples.
--- +1 mA
VRES Reset input voltage. -0.3 VCC + 0.3 V
Vesd
Electrostatic discharge voltage (human body
model). 2k V
VCDM
Charge device model CDM, EOS/ESD Ass.
Std 5.3. Number of discharges per pin: 6. 500 V
dV/dt Allowable offset voltage slew rate. -50 50 V/nsec
TJJunction temperature. -55 150
°C
Tstg Storage temperature. -55 150
TL
Lead temperature (Soldering, 10 seconds) 3
times Bosch soldering profile acc. to Bosch
soldering conditions, Gen. Spec.
- 300
L9856 Electrical specifications
7/14
2.3 Recommended operating conditions
For proper operations the device should be used within the recommended conditions.
2.4 Electrical characteristics
Table 5. Recommended operating conditions
Symbol Parameter
Value
Units
Min. Max.
VB(1) High side driver output stage voltage VS+4.4 VS+18 V
VS
High side floating supply offset voltage
(25°C)
(125°C)
-3.2
-2.9
150
150
V
VHO Output voltage gate connection VS V
BV
VCC Supply voltage 4.4 6.5 V
VIN Input voltage 0 VCC V
VRES Reset input voltage 0 VCC V
dV/dt(2) Allowable offset voltage slew rate -50 50 V/nsec
FSSwitching frequency 200 kHz
1. Reset-Logic functional for VBS > 2V, independent from VCC-level.
2. Guaranteed by design.
Table 6. Electrical characteristics
Unless otherwise specified, VCC = 5 V, VBS = 7 V, VS = 0 V, IN = 0 V, RES = 5 V,
load R = 50 Ω, C = 2.5 nF. Unless otherwise noted, these specifications apply for an
operating ambient temperature range of -40 °C < Tamb < 125 °C.
Symbol Parameter Test condition Min. Typ. Max. Unit
VCC supply
VCCUV+
VCC supply undervoltage
positive going threshold VCC rising from 0 V 4.3
V
VCCUV-
VCC supply undervoltage
negative going threshold VCC dropping from 5 V 2.8
VCCUVHYS
VCC supply undervoltage lockout
hysteresis 0.02 0.3 0.6
tdUVCC
Undervoltage lockout response
time
VCC steps either from 6.5 V
to 2.7 V or from 2.7 V to
6.5 V
0.5 20 μs
IQCC VCC supply current 400 µA
Electrical specifications L9856
8/14
VBS supply
VBSUV+
VBS supply undervoltage positive
going threshold VCC rising from 0 V 4.3 V
VBSUV-
VBS supply undervoltage negative
going threshold VCC dropping from 5 V 2.8
V
VBSUVHYS
VBS supply undervoltage lockout
hysteresis 0.02 0.3 0.4
tdUVBS
Undervoltage lockout response
time
VBS
steps either from 6.5 V
to 2.7 V or from 2.7 V to 6.5V
0.5 20 µs
IQBS1
VBS supply current
static mode,
IN = 0 V or 5 V 100 µA
IQBS2
static mode, VBS = 16 V,
IN = 0 V or 5 V 200 µA
ΔVBS VBS drop due to output turn-on CBS = 1 µF,
tdIG-IN = 3μs, tTEST = 100μs210 mV
Gate driver characteristics
IPKSo1
Peak output source current
Tj = 25 °C 120 250
mA
IPKSo2 70 150
IPKSo3 VBS = 16V , Tj = 25 °C 250 500
IPKSo4 VBS = 16 V 150 300
IHO,off HO off state leakage current guaranteed by design 1 µA
tr1
Output rise time
Tj = 25 °C 0.2 0.4
μs
tr2 0.3 0.5
tr3 VBS = 16 V, Tj = 25 °C 0.1 0.2
tr4 VBS = 16 V 0.15 0.3
IPKSi1
Peak output sink current
IN = 5 V, Tj = 25 °C 120 250
mA
IPKSi2 IN = 5 V 70 150
IPKSi3
IN = 5 V, Tj = 25 °C
VBS = 16 V 250 500
IPKSi4 IN = 5 V, VBS = 16 V 150 300
tf1
Output fall time
IN = 5 V, Tj = 25 °C 0.2 0.4
µs
tf2 IN = 5 V, 0.3 0.5
tf3
VBS = 16 V, IN = 5 V,
Tj = 25 °C 0.1 0.2
tf4 VBS = 16 V, IN = 5 V, 0.15 0.3
Table 6. Electrical characteristics (continued)
Unless otherwise specified, VCC = 5 V, VBS = 7 V, VS = 0 V, IN = 0 V, RES = 5 V,
load R = 50 Ω, C = 2.5 nF. Unless otherwise noted, these specifications apply for an
operating ambient temperature range of -40 °C < Tamb < 125 °C.
Symbol Parameter Test condition Min. Typ. Max. Unit
L9856 Electrical specifications
9/14
tplhi
Input-to-output turn-on
propagation delay (50 % input
level to 10 % output level)
0.1 0.35
µs
tphli
Input-to-output turn-off
propagation delay (50 % input
level to 90 % output level)
0.1 0.4
tplhr
RES-to-output turn-on
propagation delay (50 % input
level to 10% output level)
0.1 0.4
tphlr
RES-to-output turn-off
propagation delay (50 % input
level to 90 % output level)
0.1 0.4
Input characteristics
VINH High logic level input threshold
VCC = 5V
0.6 VCC
V
VINL Low logic level input threshold 0.28
VCC
RIN High logic level input resistance 60 100 250 kΩ
IIN High logic level input current VIN = VCC 5µA
VRESH
High logic level RES input
threshold VCC = 5V
0.6 VCC
VRESL
Low logic level RES input
threshold
0.28
VCC
RRES
High logic level RES Input
resistance 60 100 250 kΩ
IRES Low logic level input current VRES = 0 5 µA
Recharge characteristics
ton_rech
Recharge transistor turn-on
propagation delay VS = 5V 3 6 9 µs
toff_rech
Recharge transistor turn-off
propagation delay 0.1 0.5 µs
VRECH
Recharge output transistor on-
state voltage drop
1 mA forced on recharge
path on 0.5 1.2 V
Deadtime characteristics
DTHOFF
High side turn-off to recharge gate
turn-on VCC = 5 V
369
µs
DTHON
Recharge gate turn-off to high
side turn-on 0.1 0.4 0.7
Table 6. Electrical characteristics (continued)
Unless otherwise specified, VCC = 5 V, VBS = 7 V, VS = 0 V, IN = 0 V, RES = 5 V,
load R = 50 Ω, C = 2.5 nF. Unless otherwise noted, these specifications apply for an
operating ambient temperature range of -40 °C < Tamb < 125 °C.
Symbol Parameter Test condition Min. Typ. Max. Unit
Electrical specifications L9856
10/14
2.5 Logic table
Note: X means independent from signal.
Table 7. Logic table
Supply voltages
and thresholds Signals Output
Ho
Recharge
path
Vcc VBS RESET- IN-
< VCCUV- XX XOFFON
XXLOWXOFF ON
X X X HIGH OFF ON
> VCCUV+ > VBSUV+ HIGH LOW ON OFF
> VCCUV+ < VBSUV- HIGH LOW OFF OFF
L9856 Timing diagrams
11/14
3 Timing diagrams
Figure 3. Input/output timing diagram
Figure 4. Reset timing diagram
IN
RES
HO
tplhi
Recharge OFF ON
toff-rech
trx
10%
90% 90%
10%
Vs
DTHON
ton-rech
tphli
DTHOFF
tfx
IN
RES
HO
tplhi
Recharge OFF ON
toff-rech
trx
10%
90% 90%
10%
Vs
DTHON
ton-rech
tphli
DTHOFF
tfx
IN
RES
HO
tphlr
tplhr
IN
RES
HO
tphlr
tplhr
Package information L9856
12/14
4 Package information
In order to meet environmental requirements, ST (also) offers these devices in ECOPACK®
packages. ECOPACK® packages are lead-free. 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.
Figure 5. SO-8 mechanical data and package dimensions
OUTLINE AND
MECHANICAL DATA
DIM.
mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 1.750 0.0689
A1 0.100 0.250 0.0039 0.0098
A2 1.250 0.0492
b 0.280 0.480 0.0110 0.0189
c 0.170 0.230 0.0067 0.0091
D
(1) 4.800 4.900 5.000 0.1890 0.1929 0.1969
E 5.800 6.000 6.200 0.2283 0.2362 0.2441
E1(2) 3.800 3.900 4.000 0.1496 0.1535 0.1575
e 1.270 0.0500
h 0.250 0.500 0.0098 0.0197
L 0.400 1.270 0.0157 0.0500
L1 1.040 0.0409
k0˚8˚0˚8˚
ccc 0.100 0.0039
Notes: 1. Dimensions D does not include mold flash,
protrusions or gate burrs.
Mold flash, potrusions or gate burrs shall not
exceed 0.15mm in total (both side).
2. Dimension “E1” does not include interlead flash
or protrusions. Interlead flash or protrusions shall
not exceed 0.25mm per side.
SO-8
0016023 D
L9856
14/14
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