Description
The
A
3977 is a complete microstepping motor driver, with built-
in translator. It is designed to operate bipolar stepper motors in
full-, half-, quarter-, and eighth-step modes, with output drive
capability of 35 V and ±2.5 A. The A3977 includes a fixed
off-time current regulator that has the ability to operate in
slow-, fast-, or mixed-decay modes. This current-decay control
scheme results in reduced audible motor noise, increased step
accuracy, and reduced power dissipation.
The translator is the key to the easy implementation of the
A3977. Simply inputting one pulse on the STEP input drives the
motor one step (two logic inputs determine if it is a full-, half-,
quarter-, or eighth-step). There are no phase-sequence tables,
high-frequency control lines, or complex interfaces to program.
The A3977 interface is an ideal fit for applications where a
complex microprocessor is unavailable or over-burdened.
Internal synchronous-rectification control circuitry is provided
to improve power dissipation during PWM operation.
Internal circuit protection includes thermal shutdown with
hysteresis, undervoltage lockout (UVLO) and crossover-current
protection. Special power-up sequencing is not required.
The A3977 is supplied in a choice of two power packages, a
44-pin plastic PLCC with 3 internally-fused pins on each of
four sides (suffix ED), and a thin (<1.2 mm), 28-pin TSSOP
with an exposed thermal pad (suffix LP). Both packages are
lead (Pb) free, with 100% matte tin leadframe platin
Description
The
A
3977 is a complete microstepping motor driver, with built-
in translator. It is designed to operate bipolar stepper motors in
full-, half-, quarter-, and eighth-step modes, with output drive
capability of 35 V and ±2.5 A. The A3977 includes a fixed
off-time current regulator that has the ability to operate in
slow-, fast-, or mixed-decay modes. This current-decay control
scheme results in reduced audible motor noise, increased step
accuracy, and reduced power dissipation.
The translator is the key to the easy implementation of the
A3977. Simply inputting one pulse on the STEP input drives the
motor one step (two logic inputs determine if it is a full-, half-,
quarter-, or eighth-step). There are no phase-sequence tables,
high-frequency control lines, or complex interfaces to program.
The A3977 interface is an ideal fit for applications where a
complex microprocessor is unavailable or over-burdened.
Internal synchronous-rectification control circuitry is provided
to improve power dissipation during PWM operation.
Internal circuit protection includes thermal shutdown with
hysteresis, undervoltage lockout (UVLO) and crossover-current
protection. Special power-up sequencing is not required.
The A3977 is supplied in a choice of two power packages, a
44-pin plastic PLCC with 3 internally-fused pins on each of
four sides (suffix ED), and a thin (<1.2 mm), 28-pin TSSOP
with an exposed thermal pad (suffix LP). Both packages are
lead (Pb) free, with 100% matte tin leadframe platin
| Datasheets |
|
| Product Photos |
|
| Standard Package |
27 |
| Category |
|
| Family |
|
| Series |
- |
| Packaging |
Tube |
| Motor Type - Stepper |
Bipolar |
| Motor Type - AC, DC |
- |
| Function |
Driver - Fully Integrated, Control and Power Stage |
| Output Configuration |
Full H-Bridge, (2) Dual |
| Interface |
Parallel |
| Applications |
General Purpose |
| Current - Output |
2.5A |
| Voltage - Supply |
3 V ~ 5.5 V |
| Voltage - Load |
8 V ~ 35 V |
| Operating Temperature |
-20°C ~ 85°C |
| Mounting Type |
Surface Mount |
| Package / Case |
44-LCC (J-Lead) |
| Supplier Device Package |
44-PLCC (16.59x16.59) |
深圳市腾迅辉电子科技有限公司
联系人： 朱先生/文小姐/李先生
电话： 0755-83250769/83250795
手机： 18676660258
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