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參數(shù)資料
| 型號： | MIC502BM |
| 廠商： | MICREL INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Replaced by PTN78060W,PTN78060H : |
| 中文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.025 A, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大?。?/td> | 130K |
| 代理商： | MIC502BM |
MIC502
Micrel
MIC502
170
May 1999
Normal Operation
Normal operation consists of the PWM operating to control
the speed of the fan according to V
T1
and V
T2
. Exceptions to
this otherwise indefinite behavior can be caused by any of
three conditions: V
T1
exceeding V
OT
, an overtemperature
condition; V
T1
being pulled below V
IL
initiating a device
shutdown and reset; or both V
T1
and V
T2
falling below V
SLP
,
activating sleep mode. Each of these exceptions is treated as
follows:
Overtemp
V
T1
> V
OT
NORMAL
OPERATION
V
and V
T2
< V
SLEEP
NO
OUT Duty Cycle
Proportional to
Greater of V
T1
, V
T2
YES
Assert /OTF while
V
T1
> V
OT
Reset
V
T1
< V
IL
POWER ON
SLEEP
YES
NO
YES
NO
Figure 4. Normal System Behavior
Overtemperature: If the system temperature rises
typically 7% above the 100% duty-cycle operating point,
/OTF will be activated to indicate an overtemperature
fault. (V
T1
> V
OT
) Overtemperature detection is essen-
tially independent of other operations—the PWM
continues its normal behavior; with V
T1
> V
PWM(max)
, the
output duty-cycle will be 100%. If V
T1
falls below V
OT
,
the overtemperature condition is cleared and /OTF is no
longer asserted. It is assumed that in most systems, the
/OTF output will initiate power supply shutdown.
Shutdown/Reset: If V
T1
is driven below V
IL
an immedi-
ate, asynchronous shutdown occurs. While in shutdown
mode, OUT is off (low), and /OTF is unconditionally
inactive (high/floating). If V
T1
subsequently rises above
V
IH
, a device reset will occur. Reset is indistinguishable
from a power-up condition. The state of /OTF is cleared,
a startup interval is triggered, and normal fan operation
begins.
Sleep: If V
T1
and V
T2
fall below V
SLP
, the device enters
sleep mode. All internal functions cease unless V
T1
or
V
T2
rise above V
WAKE
. (V
WAKE
= V
SLP
+ V
HYST
.) The
/OTF output is unconditionally inactive (high/floating)
and the PWM is disabled during sleep. (OUT will float.)
Sleep Mode
During normal operation, if V
T1
and V
T2
fall below V
SLP
, the
device will go into sleep mode and fan operation will stop. The
MIC502 will exit sleep mode when V
T1
or V
T2
rise above V
SLP
by the hysteresis voltage, V
HYST
. When this occurs, normal
operation will resume. The resumption of normal operation
upon exiting sleep is indistinguishable from a power-on reset.
(See “Sleep: Normal Operation,” above.)
Disable PWM
Reset Released
V
T1
> V
IH
SLEEP
Reset Initiated
V
T1
< V
IL
YES
YES
W or V
V
T1
T2
>
V
SLP
+V
HYST
YES
POWER ON
NO
NO
NO
Figure 5. Sleep-Mode Behavior
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MIC502BM TR | 功能描述:IC FAN MANAGEMENT DUAL 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電機和風扇控制器，驅(qū)動器 系列:- 標準包裝:1 系列:- 應用:直流電機驅(qū)動器，步進電機驅(qū)動器 評估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負載: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） 供應商設備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
| MIC502BN | 功能描述:IC MANAGEMENT FAN/THERMAL 8DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 電機和風扇控制器，驅(qū)動器 系列:- 標準包裝:1 系列:- 應用:直流電機驅(qū)動器，步進電機驅(qū)動器 評估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負載: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） 供應商設備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
| MIC502YM | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Fan Management IC, Dual Input, PWM, SOIC-08 - Lead Free 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MIC502YM TR | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Fan Management IC, Dual Input, PWM, SOIC-08 - Lead Free 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| MIC502YN | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Fan Management IC, Dual Input, PWM, PDIP-08 (Lead Free) 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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