TLE4727 Infineon Technologies, TLE4727 Datasheet - Page 18

• Manufacturer Part Number: TLE4727
• Description: IC STEPPER MOTOR DRIVER PDIP20
• Manufacturer: Infineon Technologies

Specifications of TLE4727

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Current - Output: 800mA
• Voltage - Supply: 5 V ~ 16 V
• Operating Temperature: -40°C ~ 110°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Load: -
• Other names: SP000011864; TLE4727NK

Calculation of Power Dissipation
The total power dissipation P
The following equations give the power dissipation for chopper operation without phase
reversal. This is the worst case, because full current flows for the entire time and
switching losses occur in addition.
P
where
I
I
i
i
t
t
t
t
t
T
d
V
V
V
V
V
Datasheet
D
R
p
ON
OFF
DON
DOFF
N
q
tot
satl
satuC
satuD
Fu
S
= 2 × P
saturation losses P
quiescent losses P
switching losses P
= nominal current (mean value)
= quiescent current
= reverse current during turn-ON delay
= peak reverse current
= conducting time of chopper transistor
= turn-ON time
= turn-OFF time
= turn-ON delay
= turn-OFF delay
= cycle duration
= duty cycle t
= saturation voltage of sink transistor (T
= saturation voltage of source transistor (T
= saturation voltage of source transistor (T
= forward voltage of free-wheeling diode (D
= supply voltage
sat
+ P
q
P
P
P
+ 2 × P
sat
q
S
p
≅
/ T
≅ I
= I
V
----- -
T
S
s
q
sat
N
q
s



× V
{ V
i
--------------------- -
D
tot
satI
×
(transistor saturation voltage and diode forward voltages),
(quiescent current times supply voltage) and
(turn-ON / turn-OFF operations).
S
2
t
is made up of
DON
× d + V
+
(
----------------------------------
i
Fu
D
+
(1 – d ) + V
18
i
R
4
) t
×
X3
, T
ON
X1
X1
X1
X4
, T
, T
+
satuC
, D
)
X2
X2
I
---- - t
2
N
X2
) during charge cycle
) during discharge cycle
(
× d + V
)
DOFF
+
satuD
t
OFF
(1 – d )}
)



TLE 4727
2005-07-20