TB6557FLG(EL) Toshiba, TB6557FLG(EL) Datasheet - Page 6

• Manufacturer Part Number: TB6557FLG(EL)
• Description: IC DC MOTOR DRIVER 36QON
• Manufacturer: Toshiba

Specifications of TB6557FLG(EL)

• Applications: DC Motor Driver, H Bridge
• Number Of Outputs: 6
• Current - Output: 600mA
• Voltage - Load: 2.5 V ~ 13.5 V
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-QON
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: TB6557FLGTR

Operation of OSC oscillator: Charging and discharging external capacitor C
In the above circuit configuration, the voltage inclination, V
C
The following equations show relationships among t1 (time when V
and ∆V
The triangular oscillation frequency, f
inclination and falling inclination, so that the period is double the time between t1 and t2.
With the above OSC block and V
determined from the following formula:
Example: The calculation shows f
OSC
is represented as follows:
∆V
∴ Therefore, the relationship between C
f
f
V
OSC
t1
OSC
OSC
OSC
OSC
1
−
f
In an actual application, however, the required capacitance may slightly differ from the theoretical
value due to board pin capacitance and other factors. It is, therefore, recommended to determine the
value of C
OSC
t2
(variation in the V
=
=
=
=
= I × (t1 − t2)/C
2
2
C
= 256 kHz when C
∆
(t1
×
OSC
V
1
0.4/115
1
OSC
−
OSC block
OSC
t2)
∫
i
I
⋅
dt
C
=
1
experimentally.
µ
OSC
2
A
∆ ⋅
×
OSC
V
C
OSC
OSC
OSC
ON when
charging
ON when
discharging
OSC
I
OSC
OSC
OSC
inclination):
⋅
C
=
waveform, V
V
OSC
OSC
= 532 kHz when C
CC
= 560 pF.
6.957
, represents a single period consisting of a pair of rising V
×
10
1
OSC
3
×
OSC
C
and f
OSC
6
= |1.2 V − 0.8 V| = 0.4 V, so that the value of f
OSC
OSC
1.2 V
0.8 V
OSC
= 270 pF and
is shown by the following formula:
, for charging (or discharging) external capacitor
V
OSC
OSC
= 0.8 V), t2 (time when V
waveform
OSC
cause OSC oscillation.
TB6557FLG
OSC
OSC
2006-6-26
OSC
= 1.2 V),
is