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參數(shù)資料
| 型號： | A3979SLP |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | Microstepping DMOS Driver with Translator |
| 中文描述： | 微步驅(qū)動器，帶有翻譯的DMOS |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 330K |
| 代理商： | A3979SLP |
26184.23
A3979
Microstepping DMOS Driver with Translator
The A3979 is a complete microstepping motor driver with built-in
translator, designed as a pin-compatible replacement for the successful
A3977, with enhanced microstepping (
1
/
16
step) precision. It is designed
to operate bipolar stepper motors in full-, half-, quarter-, and sixteenth-
step modes, with an output drive capacity of up to 35 V and ±2.5 A. The
A3979 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 A3979. It
allows the simple input of one pulse on the STEP pin to drive the motor
one microstep, which can be either a full step, half, quarter, or sixteenth,
depending on the setting of the MS1 and MS2 logic inputs. There are no
phase-sequence tables, high-frequency control lines, or complex inter-
faces to program. The A3979 interface is an ideal fit for applications
where a complex microprocessor is unavailable or is overburdened.
Internal synchronous-rectification control circuitry is provided to
improve power dissipation during PWM operation. Internal circuit
protection includes: thermal shutdown with hysteresis, UVLO (under-
voltage lockout), and crossover-current protection. Special power-on
sequencing is not required.
The A3979 is supplied in a low-profile (maximum height
≤
1.20 mm),
28-pin TSSOP with exposed thermal pad. The package is available in a
lead (Pb) free version, with 100% matte tin leadframe plating.
Low R
DS(On)
outputs: 0.28
Ω
source, 0.22
Ω
sink, typical
Automatic current decay mode detection/selection
3.0 to 5.5 V logic supply voltage range
Slow, Fast or Mixed current decay modes
Home output
Synchronous rectification for low power dissipation
Internal UVLO and thermal shutdown circuitry
Crossover-current protection
±2.5 A, 35 V output rating
Use the following complete part number when ordering:
Part Number
Pb-free
A3979SLP
–
A3979SLP-T
Yes
AB SO LUTE MAX MUM RAT NGS
Load Supply Voltage,V
BB
...................................
35 V
Output Current, I
OUT
......................................
±2.5 A
*
Logic Supply Voltage, V
DD
...............................
7.0 V
Logic Input Voltage Range, V
IN
t
W
> 30 ns........................
–0.3 V to V
DD
+ 0.3 V
t
W
< 30 ns..............................
–1 V to V
DD
+ 1 V
Sense Voltage, V
SENSE
.......................................
0.5 V
Reference Voltage, V
REF
......................................
V
DD
Package Power Dissipation, P
D
.................
See page 5
Operating Temperature Range
Ambient, T
A
, Range S...................
–20°C to 85°C
Junction Temperature, T
J(MAX)
.....................
150°C
Storage Temperature, T
S
....................
–55°C to 150°C
*
Output current rating may be limited by duty cycle,
ambient temperature, and heat sinking. Under any set of
conditions, do not exceed the specified current rating or a
junction temperature of 150°C.
FEATURES
Approximate Scale 1:1
Package LP, 28-pin TSSOP
with Exposed Thermal Pad
7
8
9
10
11
12
13
6
5
20
19
18
17
16
15
21
22
14
1
2
3
4
26
25
28
27
24
23
VCP
PGND
VREG
STEP
OUT2B
RESET
SR
VBB2
PFD
RC1
AGND
REF
RC2
VDD
OUT2A
MS2
MS1
SENSE2
SENSE1
HOME
DIR
OUT1A
ENABLE
OUT1B
CP2
CP1
SLEEP
VBB1
Translator
and
Control
Logic
÷
8
Reg
Charge
Pump
PWM
Timer
Ambient, T
A
(°C)
–20 to 85
and
must be
connected together externally.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A3979SLP-T | 功能描述:IC MOTOR DRIVER MICROSTEP 28-TSS RoHS:是 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:直流電機(jī)驅(qū)動器，步進(jìn)電機(jī)驅(qū)動器 評估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負(fù)載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
| A3979SLP-T | 制造商:Allegro MicroSystems 功能描述:DMOS Driver |
| A3979SLPTR | 功能描述:IC DRIVER MICROSTEPPING 28-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:直流電機(jī)驅(qū)動器，步進(jìn)電機(jī)驅(qū)動器 評估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負(fù)載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
| A3979SLPTR-T | 功能描述:IC DRIVER MICROSTEPPING 28-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:步進(jìn)電機(jī)驅(qū)動器，1-2 相，2 相 評估套件:- 輸出數(shù):1 電流 - 輸出:800mA 電壓 - 負(fù)載:10 V ~ 28 V 電源電壓:4.75 V ~ 5.25 V 工作溫度:-20°C ~ 90°C 安裝類型:表面貼裝 封裝/外殼:28-SOP + 2 翼片裸露焊盤 供應(yīng)商設(shè)備封裝:28-HSOPHC（15.2x7.9） 包裝:剪切帶 (CT) 其它名稱:869-1268-1 |
| A397A | 制造商:n/a 功能描述:Power Semiconductor |
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