TB62206FG Toshiba, TB62206FG Datasheet - Page 14

• Manufacturer Part Number: TB62206FG
• Manufacturer: Toshiba

Specifications of TB62206FG

• Function: Driver
• Vopmax (vm*): 35V (40V)
• Io (lpeak): 1.5A (1.8A)
• Excitation: 1/2 step
• I/f: phase input (2-bit/phase)
• Mixed Decay Mode: included
• Package: HSOP20
• Rohs Compatible†: yes

IC Power Dissipation
consumed by the logic block and the charge pump circuit.
•
•
IC power dissipation is classified into two: power consumed by transistors in the output block and power
Power consumed by the Power Transistor (calculated with R
In Charge mode, Fast Decay mode, or Slow Decay mode, power is consumed by the upper and lower
transistors of the H bridges.
phases A and B is 90°) is determined by expression (1).
V
calculated as follows:
M
The following expression expresses the power consumed by the transistors of a H bridge.
The average power dissipation for output under 4-bit micro step operation (phase difference between
Thus, power dissipation for output per unit is determined as follows (2) under the conditions below.
Power consumed by the logic block and IM
The following standard values are used as power dissipation of the logic block and IM at operation.
The logic block is connected to V
Thus, the total power dissipation (P) is
For thermal design on the board, evaluate by mounting the IC.
and current consumed by output switching) is connected to V
P (out) = 2 (T
R
I
V
V
P (out) = 2 (T
I (LOGIC) = 2.5 mA (typ.):
I (I
I (I
P (Logic&IM) = 5 (V) × 0.0025 (A) + 24 (V) × 0.010 (A) = 0.25 (W) ............... (3)
P = P (out) + P (Logic&IM) = 2.65 (W)
P (standby) + P (out) = 24 (V) × 0.002 (A) + 5 (V) × 0.0025 (A) = 0.06 (W)
OUT
ON
M
DD
Power dissipation at standby is determined as follows:
M3
M1
= 24 V
= 0.60 Ω (＠1.0 A)
= 5 V
(Peak: max) = 1.0 A
) = 10.0 mA (typ.): operation/unit
) = 2.0 mA (typ.): stop/unit
r
r
) × I
) × 1.0
OUT
2
(A) × 0.60 × 2 (Ω) = 2.40 (W) ........................................ (2)
(A) × V
DD
DS
(5 V). IM (total of current consumed by the circuits connected to
(V) = 2 × I
14
OUT
2
× R
ON
ON
.............................. (1)
= 0.60 Ω)
M
(24 V). Power dissipation is
TB62206FG
2011-02-10