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參數(shù)資料
| 型號(hào)： | L6230PDTR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO36 |
| 封裝： | ROHS COMPLIANT, SOP-36 |
| 文件頁(yè)數(shù)： | 5/24頁(yè) |
| 文件大?。?/td> | 577K |
| 代理商： | L6230PDTR |
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L6230
Circuit description
Doc ID 18094 Rev 2
13/24
5.3
Non-dissipative overcurrent detection and protection
The L6230 integrates an overcurrent detection circuit (OCD) for full protection. This circuit
provides output-to-output and output-to-ground short circuit protection as well. With this
internal over current detection, the external current sense resistor normally used and its
associated power dissipation are eliminated. Figure 10 shows a simplified schematic for the
overcurrent detection circuit.
To implement the over current detection, a sensing element that delivers a small but precise
fraction of the output current is implemented with each high side power MOS. Since this
current is a small fraction of the output current there is very little additional power
dissipation. This current is compared with an internal reference current IREF. When the
output current reaches the detection threshold (typically ISOVER = 2.8 A) the OCD
comparator signals a fault condition. When a fault condition is detected, an internal open
drain MOS with a pull down capability of 4 mA connected to pin DIAG is turned on.
The pin DIAG-EN can be used to signal the fault condition to a
μC and to shut down the
three-phase bridge simply by connecting the pin to an external R-C (see REN, CEN).
Figure 10.
Overcurrent protection simplified schematic
recovering normal operation can be easily programmed by means of the accurate
thresholds of the logic inputs. It is affected whether by CEN and REN values and its
an overcurrent has been detected depends only by CEN value. Its magnitude is reported in
CEN is also used for providing immunity to pin DIAG\EN against fast transient noises.
Therefore the value of CEN should be chosen as big as possible according to the maximum
tolerable delay time and the REN value should be chosen according to the desired disable
time.
The resistor REN should be chosen in the range from 2.2 kΩ to 180 kΩ. Recommended
values for REN and CEN are respectively 100 kΩ and 5.6 nF that allow obtaining 200 μs
disable time.
+
OVER TEMPERATURE
IREF
I1+I2 / n
I1 / n
HIGH SIDE DMOS
POWER SENSE
1 cell
POWER SENSE
1 cell
POWER SENSE
1 cell
POWER DMOS
n cells
POWER DMOS
n cells
POWER DMOS
n cells
HIGH SIDE DMOS
OUT1
OUT2
VSA
OUT3
VSB
I1
I2
I3
I2/ n
I3/ n
OCD
COMPARATOR
TO GATE
LOGIC
INTERNAL
OPEN-DRAIN
RDS(ON)
40
Ω TYP.
CEN
REN
DIAG\EN
VDD
μC or LOGIC
D02IN1381
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6230Q | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 DMOS 3-Ph Motor 8 to 52V 2.8A Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L6230QTR | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 DMOS 3-Ph Motor 8 to 52V 2.8A Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L6231H | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC |
| L6232A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SPINDLE DRIVER |
| L6232B | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SPINDLE DRIVER |
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