SGS Thomson Microelectronics L9925 Datasheet
DMOS DUAL FULL BRIDGEDRIVER
2 INDEPENDENTLYCONTROLLED
H-BRIDGES
DS,ON
R
<0.9Ω @T
0.8ADC CURRENTWITHOUT HEATSINK
LOW QUIESCENTMODEI
THEMALPROTECTION
CROSSCONDUCTIONPROTECTION
SUPPLYVOLTAGEUP TO 40V
CMOSCOMPATIBLEINPUTS
OUTPUTSHORT-CIRCUIT PROTECTION
amb
=25°C,VS= 14V
q <200µA
L9925
SO28
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.Schmitttriggers are used for all
input stages and are fully compatible with 5V
CMOS logic levels. When both enable signalsare
low, the IC is commanded to a low quiescentcurrent state and will draw less than 200µA from the
battery.
BLOCK DIAGRAM
OUT1 VS1 OUT2
CHARGE
PUMP
IN1
EN1
7V T1
1st FULLBRIDGE
EN1
T1T2T2
ORDERING NUMBER: L9925
The charge pump is integrated on chip; no external componentsare required. Full performanceis
maintaned for 9V <V
6V <<V
S <9V and 16V <VS <40V yields full func-
S <16V. Extended ranges of
tionally but with relaxed performance. Over temperature protectionand ESD protectionto all pins
ensures relability and reduces system integration
failures.
CHARGE
PUMP
IN2
TEMP
EN1
EN1
7V7V
PGND1
GND
EN2
IN3
IN4
2nd FULLBRIDGE
T1 T2
5V
REGULATOR
40V
EN2
D99AT423
VS2
OUT3
OUT4
March 1999
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L9925
ABSOLUTEMAXIMUMRATINGS
Absolute Maximum Ratings are those values beyond whih damage to the device may occur. Functional
operation underthese conditionisn’t implied.
For voltages andcurrents applied externallyto the device:
Symbol Parameter Value Unit
V
VSDC Dc Supply Voltage -0.3 to 26 V
V
VSP Supply Voltage Pulse (T ≤400ms)
I
OUT
I
OUT MAX
DC Output Load Current
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 exceedthe
specified limit.
V
IN1,2
V
T
stg,Tj
P
EN
tot
DC Input Voltage -0.3 to 7 V
Enable Input Voltage -0.3 to 7 V
Storage and Junction Temperature -40 to 150 °C
Total Power Dissipation (T
(T
(T
(1) Device may be overstressed if pulsed simultaneous with short circuit at one or more of the outputs willbe present.
(1)
=80°C)
pins
=70°C no copper area on PCB)
amb
amb =70°C 8cm
2
copperareaon PCB)
40 V
1.2 A
±
1.8 A
±
5
1.23
2
W
W
W
PIN CONNECTION
PGND
IN1
EN1
N.C.
N.C.
OUT1
GND
GND
OUT3 VS2
N.C. N.C.
N.C.
EN2
IN3 IN4
2
3
4
5
6
7
8
9
10
12
13
D88AT424
28
27
26
25
24
23
22
21
20
19
18
17
16
1514PGND N.C.
N.C.1
IN2
OUT2
N.C.
N.C.
VS1
GND
GND
N.C.11
OUT4
THERMAL DATA
Symbol Parameter Value Unit
T
jTS
T
jTSH
R
th j-amb
R
th j-pins
(2)
With 6cm2on board heat sink area
Thermal Shut-downjunction temperature min. 150 °C
Thermal Shut-downthereshold hysteresis typ. 25 °C
Thermal Resistance Junction-ambient
(2)
50 °C/W
Thermal Resistance Junction-pins 15 °C/W
2/9
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 bridge1
7, 8 GND Ground
9 OUT3 Output of one half of bridge2
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
ELECTRICALCHARACTERISTICS (VS = 9 to 16V; Tj =-40 to 150°C
(3)
, unlessotherwise specified.)
Symbol Parameter Test Condition Min. Typ. Max. Unit
T
T
T
I
R
d-on
d-SB
d-off
t
rise
t
fall
IL
S
ds
Quiescent Current EN1 = EN2 =0V; Tj=85°C 200
EN1 = EN2 =5V; I
= 0A 5 12 mA
load
Switch on Resistance Tj=25°C; VS= 14V; Io=300mA 0.75 0.8
= 125°C; VS= 6V; Io=300mA 1.5 1.9
T
j
Turn-on delay See Fig 1 10 50
Standby setting time See Fig 1 50 200
Turn-off delay See Fig 1 10 50
Output rise time (10 to 90%) See Fig 1 0.5 5 20
Output fall time (90to 10%) See Fig 1 0.5 5 20
o Output leakage current EN = 0V;Vo =VS or GND -10 10 mA
INx, ENx Logic Input Lowvoltage -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 µA
The voltage referedto GND and currents are assumed positive, when the current flows into thepin.
(3) Tested up to 125°C, parameter guaranted by correlation up to150°C
A
µ
Ω
Ω
s
µ
s
µ
s
µ
s
µ
s
µ
3/9
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