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| TB62202AFG Datasheet, PDF (5/84 Pages) Toshiba Semiconductor – Dual-Stepping Motor Driver IC for OA Equipment Using PWM Chopper Type | |||
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TB62202AFG
4. Output control circuit, current feedback circuit and current setting circuit (A/B unit
(C/D unit is the same as A/B unit)
Micro-step current setting
data logic circuit
Chopping
reference circuit
Current
feedback
circuit
Current
setting
circuit
Output control circuit PHASE
NF
set current
reached signal
RNF
set current
monitor signal
MIXED
DECAY
TIMING
Charge start
Output stop
U1
signal
U2
L1
Output control circuit
L2
DECAY
MODE
MIXED
DECAY
TIMING
circuit
CR
COUNTER
CR COUNTER
Output circuit
RESET
Output pin
VM
VDD
ISD (current
shutdown)
circuit
VMR
circuit
VDDR
circuit
Output RESET signal
Reset signal
selector
circuit
Charge
pump
halt
signal
VDD
VM
Power supply
for upper
output MOS
transistors
VH
Charge pump
circuit
Thermal
shut down
(TSD)
circuit
Protection circuit
Charge pump
circuit
MICRO-STEP
CURRENT SETUP
LATCH CLEAR signal
VDDR: VDD power on Reset
VMR: VM power on Reset
ISD: Current shutdown circuit
TSD: Thermal shutdown circuit
LOGIC
MIXED DECAY
TIMING TABLE
CLEAR signal
Output
circuit
Ccp A
Ccp B
Ccp C
Note: The RESET pins is pulled down in the IC by 10-k⦠resistor.
When not using the pin, connect it to GND. Otherwise, malfunction may occur.
5
2005-04-04
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