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參數(shù)資料
| 型號(hào)： | SA56202 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | One-chip motor driver |
| 中文描述： | 單芯片電機(jī)驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 117K |
| 代理商： | SA56202 |
9397 750 12772
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Preliminary data sheet
Rev. 01 — 19 July 2004
11 of 24
Philips Semiconductors
SA56202
One-chip motor driver
where N
PP
indicates the number of pole pairs of the motor. FG has an open-drain output
for easy interfacing to 3 V and 5 V logic.
7.7 Sled motor driver
Two current-steering PWM channels are available to drive a stepper motor. Per channel
an external sense resistor R
sense
is used that is connected to ground. A peak-current
control loop is implemented that modulates the duty cycle of the PWM signal. See
Figure 9
.
The clock generator has a nominal frequency of f
osc
/256 = 70 kHz. See
Figure 10
for the
transfer function from input voltage V
VINSLD
to output current at a typical R
sense
of 0.5
.
Input-to-output transconductance gain can be scaled down by connecting an external
resistor R
ext
in series with the input VINSLD.
Both limit current and transconductance gain are related to R
sense
in the following way:
Transconductance gain,
Limit current,
Fig 9.
Peak-current control architecture of stepper motor driver.
Fig 10. Transfer function of stepper motor driver.
Σ
001aaa435
M
R
S
Q
CLOCK
70 kHz
LOGIC
DRIVE
DRIVER
A
VINSLD
Rsense
IO
Rext
47 k
+
47 k
V
VINREF
input amplifier
V
VINREF
001aaa436
V
VINSLD
V
VINREF
(V)
1 A
+
1 A/V
+
1 A/V
1 A
I
OUT
(A)
dead zone
30 mV
30 mV
I
o
V
in
-------
R
sense
2
×
-----------------------
=
I
LIM
1V
R
sense
2
-----------------------
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
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| SA56-21EWA | 功能描述:LED 顯示器和配件 Single Red 625nm Common Anode RoHS:否 制造商:Avago Technologies 顯示器類型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長:628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
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