tb62214ftg TOSHIBA Semiconductor CORPORATION, tb62214ftg Datasheet - Page 16

• Manufacturer Part Number: tb62214ftg
• Description: Bicd Constant-current Two-phase Bipolar Stepping Motor Driver Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

IC Power Consumption
consumed by the output transistors, and 2) the power consumed by the digital logic and pre-drivers.
The power consumed by the TB62214FG/FTG is approximately the sum of the following two: 1) the power
The power consumed by the output transistors is calculated, using the R
Whether in Charge, Fast Decay or Slow Decay mode, two of the four transistors comprising each H-bridge
contribute to its power consumption at a given time.
power consumption in the output transistors is calculated as follows:
standby modes:
digital logic operates off a voltage regulator that is internally connected to the V
consists of the digital logic connected to V
output transistors. The total power consumed by I
Thus the power consumed by each H-bridge is given by:
In two-phase excitation mode (in which two phases have a phase difference of 90°), the average
The power consumption in the I
The current consumed in the digital logic portion of the TB62214FG/FTG is indicated as I
Hence, the total power consumption of the TB62214FG/FTG is:
Board design should be fully verified, taking thermal dissipation into consideration.
P (out) = I
R
P (out) = 2Hsw × 1.0
Normal operation mode: I (I
Standby mode: I (I
P (I
I
V
P = P (out) + P (I
P (Standby) + P (out) = 24 (V) × 0.002 (A) = 0.048 (W)
OUT
ON
M
The standby power consumption is given by:
M
= 24 V
= 1.0 Ω (@2.0 A), the sum of the high-side DMOS and low-side DMOS
) = 24 (V) × 0.005 (A) = 0.12 (W)........................................................... (3)
(Peak) = 1.0 A
OUT
(A) × V
M
) = 2.12 (W)
M1
2
) = 2.0 mA (typ.)
(A) × 1.0 (Ω) = 2.0 (W)................................................ (2)
DS
(V) = 2 × I
M3
M
) = 5.0 mA (typ.)
domain is calculated separately for normal operation and
OUT
16
M
2
(24 V) and the network affected by the switching of the
× R
ON
Mx
......................................... (1)
can be estimated as:
ON (D-S)
value of 1.0Ω.
TB62214FG/FTG
M
power supply. It
2010-06-10
Mx
. The