TLE4726G Infineon Technologies, TLE4726G Datasheet - Page 19

• Manufacturer Part Number: TLE4726G
• Description: IC STEPPER MOTOR DRVR PDSO-24-3
• Manufacturer: Infineon Technologies
• Type: Stepper Motor Controllerr

Specifications of TLE4726G

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Current - Output: 800mA
• Voltage - Supply: 5 V ~ 50 V
• Operating Temperature: -25°C ~ 110°C
• Mounting Type: Surface Mount
• Package / Case: DSO-24
• Operating Supply Voltage: 5 V to 50 V
• Supply Current: 20 mA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: SP000011863; TLE4726GNT; TLE4726GT

Calculation of Power Dissipation
The total power dissipation
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
V
I
Data Sheet
D
R
p
ON
OFF
DON
DOFF
N
q
L
tot
satl
satuC
satuD
Fu
S
L
= 2
saturation losses
quiescent losses
switching losses
= 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 (T3, T4)
= saturation voltage of source transistor (T1, T2) during charge cycle
= saturation voltage of source transistor (T1, T2) during discharge cycle
= forward voltage of free-wheeling diode (D1, D2)
= supply voltage
= logic supply voltage
= current from logic supply
P
sat
+
P
P
P
q
P
sat
q
+ 2
S
=
p
/
T
I
V
------
T
q
I
P
S
P
N
P
P
s
q
sat
{
s
V
i
--------------------- -
D
V
P
S
satl
tot
+
(transistor saturation voltage and diode forward voltages),
(quiescent current times supply voltage) and
(turn-ON / turn-OFF operations).
2
t
DON
is made up of
I
L
d
+
+
V
L
i
----------------------------- -
V
D
Fu
+
(1 –
i
R
4
19
t
d
ON
) +
+
V
I
---- -
2
N
satuC
t
DOFF
d
+
+
t
OFF
V
satuD
(1 –
d
) }
TLE 4726
1999-09-15