tb62214fng TOSHIBA Semiconductor CORPORATION, tb62214fng Datasheet - Page 14
tb62214fng
Manufacturer Part Number
tb62214fng
Description
Bicd Constant-current Two-phase Bipolar Stepping Motor Driver Ic
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TB62214FNG.pdf
(23 pages)
IC Power Consumption
by the output transistors, and 2) the power consumed by the digital logic and pre-drivers.
The power consumed by the TB62214FNG is approximately the sum of the following two: 1) the power consumed
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 TB62214FNG is indicated as I
Hence, the total power consumption of the TB62214FNG 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
14
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.
M
TB62214FNG
power supply. It
2010-10-01
Mx
. The