TEA3718SFP STMicroelectronics, TEA3718SFP Datasheet - Page 6

• Manufacturer Part Number: TEA3718SFP
• Description: IC STEPPER MOTOR DRIVER 20-SOIC
• Manufacturer: STMicroelectronics
• Type: Stepper Motor Controller/Driverr

Specifications of TEA3718SFP

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: ±1.5A
• Voltage - Load: 10 V ~ 45 V
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 50 V
• Supply Current: 25 mA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Device diagrams
Table 2.
Table 3.
6/26
OUTB
PULSE TIME
V
GND
V
IN1
PHASE
IN0
COMPARATOR INPUT
REFERENCE
V
OUTA
SENSE RESISTOR
ALARM
PRE-ALARM
TEA3718SDP
TEA3718SFP
TEA3718SP
TEA3718DP
S
SS
S
(B)
(A)
Device
Name
Pin functions
Device comparison table
Output connection (with pin OUT A). The output stage is a "H" bridge formed by four
transistors and four diodes suitable for switching applications.
A parallel RC network connected to this pin sets the OFF time of the lower power
transistors. The pulse generator is a monostable triggered by the rising edge of the
output of the comparators (t
Ground connection. In SO20 and power DIP these pins also conduct heat from die to
printed circuit copper.
Supply voltage input for logic circuitry
This pin and pin IN0 are logic inputs which select the outputs of three comparators to set
the current level. Current also depends on the sensing resistor and reference voltage.
See
This TTL-compatible logic input sets the direction of current flow through the load. A
high level causes current to flow from OUT A (source) to OUT B (sink). A Schmidt trigger
on this input provides good noise immunity and a delay circuit prevents output stage
short circuits during switching.
See IN1
Input connected to the three comparators. The voltage across the sense resistor is
feedback to this input through the low pass filter RCCC. The lower power transistor are
disabled when the sense voltage exceeds the reference voltage of the selected
comparator. When this occurs the current decays for a time set by R
T
A voltage applied to this pin sets the reference voltage of the three comparators.
Reference voltage with the value of R
output current.
See pin OUT B
Supply voltage input for half output stage
Supply voltage input for half output stage
Connection to lower emitters of output stage for insertion of current sense resistor
When T
When T
off
Current
= 0.69 R
Table 8: Truth table
1.5 A
1.5 A
1.5 A
1.5 A
j
j
reaches T1
reaches T2
T
C
T
.
Power DIP 12+2+2
SO20
Multiwatt 15
Power DIP 12+2+2
o
o
C the alarm output becomes low (TEA3718SP)
C the pre-alarm output becomes low (T2<T1) (TEA3718SFP)
.
Package
off
= 0.69 R
S
T
and the two inputs IN0 and IN1 determines the
Function
C
T
).
Not connected
Connected
Alarm
T
C
Not connected
T
Connected
Pre-alarm
,