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參數(shù)資料
| 型號： | L8229 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 1.5 A, PDSO24 |
| 封裝： | LEAD FREE, SSO-24 |
| 文件頁數(shù)： | 14/42頁 |
| 文件大小： | 858K |
| 代理商： | L8229 |
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L8229
L8229_0 and L8229_1 modes
8
L8229_0 and L8229_1 modes
When in these modes, the device can be programmed via a serial interface. This allows a
very precise microstepping functionality as well as the control of several parameters related
to the motor functionality.
In this configuration there is also the possibilty of driving two DC motors by means of two
pulse width modulated (PWM) control signals.
The parameters that can be set are the following:
1.
Current levels (32 values for each bridge).
2.
Current direction.
3.
Type of decay for stepping motor (Mix/Slow).
4.
Vref input (Ext/Int)
5.
Vref divider (:5/:10).
6.
Blanking time (4 values).
7.
Oscillator freq divider (4 values).
8.
Off time (32 values).
9.
Fast decay time (16 values).
10. Synchronous rectification (Active/Passive/LowSide/Off).
11. Choose of driving a Stepping or DC motor.
12. Possibility of paralleling bridges (in DC motor drive).
13. Slow or fast decay (in DC motor drive).
14. Possibility of setting outputs in brake mode.
15. Possibility of asserting Sleep mode to reduce current consumption and put outputs in
HI-Z.
When in L8229 modes, pin 12 (FAULT) is used to provide a "Generic Fault" signal that is
intended as a warning for the user. In case of:
a)
Undervoltage detection (UVD): no action is taken on output bridges and the device
will be working, leaving to the user the action of stopping the output bridges
functionality.
During UVD event, the Generic Fault signal is pulled high.
b)
Thermal shutdown (TSD): output bridges will be in Hi-Z mode (all outputs off) until
the temperature decreases below TSD threshold minus hysteresis.
During TSD event, the Generic Fault signal is pulled high.
c)
Over current detection (OCD): output bridges will be in Hi-Z mode. Depending on
the motor (Stepping or DC according to W2 bit 14), the OCD status will be latched
as follows:
– for stepping motor driving the OCD status will be latched until SPI is reset by
means of nRESET pin.
– for DC motor driving the OCD status will be latched until next positive PWM
edge occurs.
For both above cases, the Generic Fault signal is pulled high until the OCD
status persists.
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