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PDF THB7128-E Data sheet ( Hoja de datos )
| Número de pieza | THB7128-E | |
| Descripción | PWM current control stepping motor driver | |
| Fabricantes | ETC | |
| Logotipo |  |
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Preliminary Specifications
Product Name THB7128-E
Ver1.3
1．Case Outline：19 pins (See attached case outline dimensions.)
2．Function ：PWM current control stepping motor driver
3．Application ：Industrial equipment etc.
4．Features：
・Output on-resistance (High side 0.3 Ω, Low side 0.25 Ω, Total 0.55 Ω; Ta = 25℃, IO = 2.5A)
・VMmax=40V(DC)，Iopmax=3.3A
・2, 1-2, W1-2, 2W1-2, 4W1-2, 8W1-2, 16W1-2, 32W1-2 phase excitation are selectable
・With built-in automatic half current maintenance energizing function
・Over current protection circuit
・Thermal shutdown circuit
・Input pull down resistance
・With reset pin and enable pin
5．Absolute Maximum Ratings／Tc=25℃
Parameter
Symbol
supply voltage
VMmax
Peak output current
Iopmax
Logic input voltage
VINmax
VREF input voltage
VREFmax
Operating substrate temperature
Tc
Storage temperature
Tstg
Conditions
6．Allowable Operating Ranges／Ta=25℃
Parameter
Symbol
Supply voltage range
VM
Logic input voltage range
VIN
VCC input voltage range
VCC
VREF input voltage range
VREF
Output current1
Io1
Output current2
Io2
Output current3
Io3
Conditions
1-2Phase-ex，Tc≦90℃
1-2Phase-ex，Tc=105℃
2Phase-ex，Tc=105℃
Ratings
40
3.3
6
3
-30 to +105
-40 to +125
Unit
V
A
V
V
℃
℃
Ratings
9 to 32
0 to 5
0 to 5
0 to 3
3.0
2.5
1.8
Unit
V
V
V
V
A
A
A
RoHS DIRECTIVE PASS
091218MA
023-09-0009
No.1
1 page  
THB7128-E
11．Description of functions
(1) Excitation setting method
Set the excitation setting as shown in the following table by setting M1 pin, M2 pin and M3 pin
Input signal
M3 M2 M1
MODE（Excitation）
Initial position
A phase current B phase current
LLL
2 Phase
100％
-100％
L LH
1-2 Phase
100％
0％
LHL
W1-2 Phase
100％
0％
LHH
2W1-2 Phase
100％
0％
HLL
4W1-2 Phase
100％
0％
HLH
8W1-2 Phase
100％
0％
HHL
16W1-2 Phase
100％
0％
HHH
32W1-2 Phase
100％
0％
The initial position is also the default state at start-up and excitation position at counter-reset in each
excitation mode
(2)Output current setting
Output current is set as shown below by the VREF pin (applied voltage) and a resistance value between
NFA (B) pin and GND.
IOUT = (VREF / 5) / NFA (B) resistance
* The setting value above is a 100% output current in each excitation mode.
(Example) When VREF=1.5V and NFA (B) resistance is 0.3 Ω, the setting current is shown below.
IOUT = (1.5 V / 5) / 0.3 Ω = 1.0 A
(3) Chip enable terminal/ VCC function
When Chip enable terminal/ VCC pin is at low levels, the IC enters stand-by mode, all logic is reset and output
is turned OFF.
When Chip enable terminal/ VCC pin is at high levels, the stand-by mode is released
(4) Step pin function
CLK pin step signal input allows advancing excitation step
Input
Operation
VCC
CLK
L * Stand-by mode
H Excitation step feed
H Excitation step hold
(5) Forward / reverse switching function
CW/CCW
L
H
Operation
CW
CCW
(6) Output enable function
When the ENABLE pin is set Low, the output is forced OFF and goes to high impedance. However, the internal
logic circuits are operating, so the excitation position proceeds when the CLK is input. Therefore, when ENABLE pin
is returned to High, the output level conforms to the excitation position proceeded by the CLK input.
(7) DECAY mode
The DECAY mode of the output current becomes only MIXED DECAY.
091218MA
023-09-0009
No.5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet THB7128-E.PDF ] | |
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