TB62214AFNG
2012-04-17
3
Block Diagram
In the block diagram, part of the functional blocks or constants may be omitted or simplified for explanatory
purposes.
Note: All the grounding wires of the TB62214AFNG must run
on the solder mask on the PCB and be externally
terminated at only one point. Also, a grounding method should be considered for efficient heat dissipation.
Careful attention should be paid to the layout of the output, V
DD
(V
M
) and GND traces, to avoid short-circuits
across output pins or to the power supply or ground. If such a short-circuit occurs, the TB62214AFNG may be
permanently damaged.
Also, utmost care should be taken for pattern designing and implementation of the TB62214AFNG since it has the
power supply pins (V
M
, R
S_
A, RS_B, OUT_A, OUT_A , OUT_B, OUT_B , GND) particularly a large current can run
through. If these pins are wired incorrectly, an operation error or even worse a destruction of the TB62214AFNG
may occur.
The logic input pins must be correctly wired, too; otherwise, the TB62214AFNG may be damaged due to a current
larger than the specified current running through the IC.
Please note the above when designing and implementing IC patterns.
Detection Circuit
Current Feedback (×2)
Chopper OSC
RESET
CW/CCW
ENABLE
D_MODE_1
D_MODE_2
CLK
Current Level Set
Vcc Voltage
Regulator
OSC
CR-CLK
Converter
OSCM
VCC
Vref
V
RS
VMR
Detect
V
M
RS
R
S
COMP
Output Control
(Mixed Decay Control)
VM
VMR
Detect
TSD ISD
Output
(H-Bridge×2)
Stepping
Motor
ENABLE
VM
MO_OUT
Step Decoder
(Input Logic)
