2 INDEPENDENTLY CONTROLLED
H-BRIDGES
R
DS,ON
<0.9 @ T
amb
= 25°C, V
S
= 14V
0.8A DC CURRENT WITHOUT HEAT SINK
LOW QUIESCENT MODE I
q
<200µA
THEMAL PROTECTION
CROSS CONDUCTION PROTECTION
SUPPLY VOLTAGE UP TO 40V
CMOS COMPATIBLE INPUTS
OUTPUT SHORT-CIRCUIT PROTECTION
DESCRIPTION
The L9925 is a dual full bridge driver for stepper
motor applications. Realized in BCD (Bipolar,
CMOS & DOS) techology, logic circuits, precise
linear blocks and power transistors are combined
to optimize circuit performance and minimize off
chip components. Schmitt triggers are used for all
input stages and are fully compatible with 5V
CMOS logic levels. When both enable signals are
low, the IC is commanded to a low quiescent cur-
rent state and will draw less than 200µA from the
battery.
The charge pump is integrated on chip; no exter-
nal components are required. Full performance is
maintaned for 9V <V
S
<16V. Extended ranges of
6V <<V
S
<9V and 16V <V
S
<40V yields full func-
tionally but with relaxed performance. Over tem-
perature protection and ESD protection to all pins
ensures relability and reduces system integration
failures.
...............................................................................................................................................................................................................
March 1999
®
CHARGE
PUMP
TEMP
OUT1 VS1 OUT2
IN2
PGND1
VS2
OUT3
OUT4
IN1
EN1
GND
EN2
IN3
IN4
2nd FULL BRIDGE
1st FULL BRIDGE
5V
REGULATOR
EN1
EN1
EN1
EN2
40V
7V7V
7V T1
T1
T2
T2
T1 T2
CHARGE
PUMP
D99AT423
BLOCK DIAGRAM
SO28
ORDERING NUMBER: L9925
L9925
DMOS DUAL FULL BRIDGE DRIVER
1/9
Obsolete Product(s) - Obsolete Product(s)
Obsolete Product(s) - Obsolete Product(s)
Obsolete Product(s) - Obsolete Product(s)
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond whih damage to the device may occur. Functional
operation under these condition isn’t implied.
For voltages and currents applied externally to the device:
Symbol Parameter Value Unit
V
VSDC
Dc Supply Voltage -0.3 to 26 V
V
VSP
Supply Voltage Pulse (T
400ms)
(1)
40 V
I
OUT
DC Output Load Current
±
1.2 A
I
OUT MAX
DC Output Current: for VOUT > VVS +0.3V or VOUT < -0.3V
the internal DMOS reverse and/or substrate diode become
conductive and the applied current should not exceed the
specified limit.
±
1.8 A
V
IN1,2
DC Input Voltage -0.3 to 7 V
V
EN
Enable Input Voltage -0.3 to 7 V
T
stg
, T
j
Storage and Junction Temperature -40 to 150 °C
P
tot
Total Power Dissipation (T
pins
= 80°C)
(T
amb
= 70°C no copper area on PCB)
(T
amb
=70°C 8cm
2
copper area on PCB)
5
1.23
2
W
W
W
(1) Device may be overstressed if pulsed simultaneous with short circuit at one or more of the outputs will be present.
THERMAL DATA
Symbol Parameter Value Unit
T
jTS
Thermal Shut-down junction temperature min. 150 °C
T
jTSH
Thermal Shut-down thereshold hysteresis typ. 25 °C
R
th j-amb
Thermal Resistance Junction-ambient
(2)
50 °C/W
R
th j-pins
Thermal Resistance Junction-pins 15 °C/W
(2)
With 6cm
2
on board heat sink area
PGND
IN1
EN1
N.C.
N.C.
GND
OUT1
GND
OUT3 VS2
GND
GND
N.C.
VS1
N.C.
OUT2
IN2
N.C.1
3
2
4
5
6
7
8
9
26
25
24
23
22
20
21
19
27
10
28
N.C. N.C.
D88AT424
N.C.
EN2
IN3 IN4
OUT4
N.C.11
12
13
18
16
17
1514PGND N.C.
PIN CONNECTION
L9925
2/9
Obsolete Product(s) - Obsolete Product(s)
Obsolete Product(s) - Obsolete Product(s)
ELECTRICAL CHARACTERISTICS
(V
S
= 9 to 16V; T
j
= -40 to 150°C
(3)
, unless otherwise specified.)
Symbol Parameter Test Condition Min. Typ. Max. Unit
I
S
Quiescent Current EN1 = EN2 =0V; T
j
= 85°C 200
µ
A
EN1 = EN2 =5V; I
load
= 0A 5 12 mA
R
ds
Switch on Resistance T
j
= 25°C; V
S
= 14V; I
o
=300mA 0.75 0.8
T
j
= 125°C; V
S
= 6V; I
o
=300mA 1.5 1.9
T
d-on
Turn-on delay See Fig 1 10 50
µ
s
T
d-SB
Standby setting time See Fig 1 50 200
µ
s
T
d-off
Turn-off delay See Fig 1 10 50
µ
s
t
rise
Output rise time (10 to 90%) See Fig 1 0.5 5 20
µ
s
t
fall
Output fall time (90 to 10%) See Fig 1 0.5 5 20
µ
s
IL
o
Output leakage current EN = 0V; V
o
=V
S
or GND -10 10 mA
INx, ENx Logic Input Low voltage -0.3 1.5 V
Logic Input High voltage 3.5 6 V
Hysteresis 0.5 1.0 2.0 V
Ibias Input bias current -50 300
µ
A
The voltage refered to GND and currents are assumed positive, when the current flows into the pin.
(3) Tested up to 125°C, parameter guaranted by correlation up to 150°C
PIN FUNCTIONS
N. Name Function
1 PGND1 Ground for DMOS sources in bridge 1
2 IN1 Digital Input from motor controller for bridge 1
3 EN1 Logic enable/disable for bridge 1 (active high)
4, 5 NC No connect
6 OUT1 Output of one half of bridge 1
7, 8 GND Ground
9 OUT3 Output of one half of bridge 2
10, 11 NC No connect
12 EN2 Logic enable/disable for bridge 2 (active high)
13 IN3 Digital Input from motor controller for bridge 2
14 PGND2 Ground for DMOS sources in bridge 2
15 NC No connect
16 IN4 Digital Input from motor controller for bridge 2
17 OUT4 Output of one half of bridge 2
18, 19 NC No connect
20 VS2 Supply Voltage for bridge 2
21, 22 GND Ground
23 VS1 Supply Voltage for bridge 1
24, 25 NC No connect
26 OUT2 Output of one half of bridge 1
27 IN2 Digital Input from motor controller for bridge 1
28 NC No connect
L9925
3/9
Obsolete Product(s) - Obsolete Product(s)

L9925

Mfr. #:
Manufacturer:
STMicroelectronics
Description:
IC MTR DRVR BIPOLAR 9V-16V 28SO
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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