tb62202afg TOSHIBA Semiconductor CORPORATION, tb62202afg Datasheet - Page 48

• Manufacturer Part Number: tb62202afg
• Description: Dual-stepping Motor Driver Ic For Oa Equipment Using Pwm Chopper Type
• Manufacturer: TOSHIBA Semiconductor CORPORATION

22. Mixed decay timing
With V
TIMING TABLE.
Then change the SETUP pin from H to L. With load L, perform chopping and monitor the output current
waveform at that time. Confirm that the switching timing from Slow Decay Mode to Fast Decay Mode within an
fchop cycle is the specified MIXED DECAY TIMING.
(Depending on the load L value and the test environment, chopping may be performed every two cycles or there
may be no Slow Decay Mode. If so, conditions, for example, load condition, may need to be changed.
V
SGND
Output current value
DD
(set current value)
M
= 24 V, V
5 V
0 V
5 V
0 V
5 V
0 V
At measuring, non-reset
RESET = 5 [V]
DD
= 5 V, RESET = H, change the SETUP pin from L to H and overwrite the MIXED DECAY
0%
Charge
(A/B unit only. C/D unit conforms to A/B unit.)
SGND
27
31
30
29
28
8
6
Slow
RESET
CR
V
STROBE AB
CLK AB
DATA AB
SETUP
DD
MDT
P-GND
48
Fast
MDT
100% 0%
V
Current waveform
R
R
Ccp C
Ccp B
Ccp A
ref AB
V
V
(F
RS A
RS B
V
M A
M B
SS
IN
A
B
A
B
)
36
34
32
35
13
12
9
2
5
3
1
7
Charge
SGND
Ccp 2
Ccp 1
R
R
Slow
RS A
RS B
MDT
: PGND
: SGND (V
MDT
TB62202AFG
Fast
SGND
2005-04-04
SS
)