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參數(shù)資料
| 型號： | AM5901ALF44-E1 |
| 廠商： | BCD Semiconductor Manufacturing Limited |
| 英文描述： | 4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER |
| 中文描述： | 4通道馬達驅(qū)動器，功率控制器 |
| 文件頁數(shù)： | 15/19頁 |
| 文件大?。?/td> | 297K |
| 代理商： | AM5901ALF44-E1 |
Data Sheet
15
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
3. Soft-Start Function
The soft-start is functioned by putting a capacitor
between DEAD terminal and GND, the
maximum duty can be changed by attaching a
resistance to pin 4.
t = C
DEAD
* R (sec)
(R=65k
)
4. Power-Off Operation
SPRT terminal is charged by setting OFF
terminal to "L". Then, switching of SW terminal
is terminated when the voltage of the SPRT
terminal has reached 1.245V (Typ.). Time to
disable switching depends on a capacitor of the
SPRT terminal and it can be calculated by the
expression:
t = C
SPRT
* V
TH
/I
OFF
(sec)
(V
TH
= 1.245V, I
HV
= 20
μ
A)
5. Over-Voltage Protection Operation
When the voltage applied to BSEN terminal has
been 8.4V (Typ.), SPRT terminal is charged.
Then, switching of SW terminal is terminated
when the voltage of the SPRT terminal has
reached 1.245V (Typ.). Time to disable
switching depends on a capacitor of SPRT
terminal and it can be calculated by the
expression:
t = C
SPRT
* V
TH
/I
HV
(sec)
(V
TH
= 1.245V, I
HV
= 20
μ
A)
PWM Power Supply Driver Circuit
This circuit detects a maximum output level of
drivers of four channels and performs the PWM
supply of load drive power supply. This circuit
uses PNP transistor, Schottky Diode and
capacitor as external component.
"Empty" Detector Unit
When the voltage applied to BSEN terminal has
reached the detecting voltage or less. EMP
terminal varies from "H" to "L" (open collector
output). Hysteresis of 50mV (Typ.)
is set
to the
detecting voltage to prevent the output
chattering.
The
detecting
depending on SEL terminal as follows:
voltage
varies
SEL Pin
Detecting
Voltage
Return
Voltage
L
2.2V (Typ.)
2.25V (Typ.)
High-Z
1.8V (Typ.)
1.85V (Typ.)
Application Information (Continued)
PSW
PWMFIL
36
37
44
47 F
2200pF
47
10pF
100k
HVcc
SBD
0.1 F
+
33 H
μ
μ
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