L6242 STMicroelectronics, L6242 Datasheet - Page 2

• Manufacturer Part Number: L6242
• Description: Motor / Motion / Ignition Controllers & Drivers DISC BY STM 11/99
• Manufacturer: STMicroelectronics

Specifications of L6242

• Mounting Style: SMD/SMT
• Package / Case: SO-20
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

L6242
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS (V
APPLICATION INFORMATIONS
Figure 1 shows the L6242 configurated as a tran-
sconductance amplifier, in order to drive linear
motors as Voice Coil (VCM). The L6242 provides
the power section of the Transconductance Am-
plifier. The two OP AMP are configurated one as
inverting and the other as noninverting amplifier,
with the same gain. Working in push-pull, they
can be configurated as a bridge. The motor cur-
rent can be controlled by means of the sense re-
sistor (typical 1 ) in series with the motor. The
current sense amplifier provides the feedback sig-
nal, which is summed to the driving signal at the
node which is the inverting input of the Error Am-
2/5
Symbol
Symbol
T
CMR
V
V
SVR
stg
V
P
I
T
G
V
V
R
V
I
S
T
V
V
I
R
I
I
I
I
OS
drop
drop
eq
O
OS
ol
P
tot
S
b
sd
, T
S
S
d
e
r
V
p
i
i
i
J
Supply Voltage
Input Voltage
Differential Input Voltage
DC Output Current
Peak Output Current (non repetitive)
Maximum Power Dissipation at T
Storage and Junction Temperature Range
Supply Voltage
Quiescent Drain Current
Input Bias Current
Input Offset Voltage
Input Offset Current
Slew Rate
Input Resistance
Open Loop Voltage Gain
Common Mode Rejection
Supply Voltage Rejection
High Drop Voltage
Low Drop Voltage
Thermal Shutdown Junction Temperature
Internal Pull-up Resistor of the Enable Input
Enable Low Voltage
Quiescent Drain Current
Enable Delay
Output Leakage Current
Parameter
Parameter
S
T
= 12V, T
amb
CASE
= 85 C
= 75 C
J
= 25 C unless otherwise specified)
V
f = 100Hz
f = 100Hz
f = 100Hz R
V
I = 100mA
I = 500mA
I = 100mA
I = 500mA
T
En = L
J
O
r
plifier. R1 closes the control loop. R2 converts the
input voltage signal, into a current signal.
The snubber network provides the system stabil-
ity, always required by the application. The net-
work is directly connected to the output pins of
the IC, OUT1 and OUT2, and in parallel with the
load. R4 and C2 could be of different values, de-
pending on the p.c.b. configuration and on the
motor characteristics.
The DC transfer function may be expressed as:
gm = Iout/Vin = k (R1/R2)
where k = 1/(Rsense Ad)
and Ad = gain of the current sense amplifier.
= 0.5V
= 130 C
Test Condition
= V
S
/2
g
= 10K
Min.
-0.3
500
70
66
4
-40 to 150
Value
Typ.
145
VS
1.5
0.2
1.5
0.7
0.3
0.6
28
10
10
80
84
54
10
V
1
1
5
1
2
S
Max.
1.5
1.2
28
15
15
50
50
50
1
1
5
V/ s
Unit
Unit
mA
mV
K
K
mA
nA
dB
dB
dB
W
W
V
V
V
A
A
V
V
V
V
V
V
C
C
A
A
s