- 您現在的位置：買賣IC網 > PDF目錄384734 > MIC2546-1BTS (MICREL INC) Replaced by PT6527 : PDF資料下載
參數資料
| 型號： | MIC2546-1BTS |
| 廠商： | MICREL INC |
| 元件分類： | 外設及接口 |
| 英文描述： | Replaced by PT6527 : |
| 中文描述： | 0.1 A 2 CHANNEL, BUF OR INV BASED PRPHL DRVR, PDSO16 |
| 封裝： | TSSOP-16 |
| 文件頁數： | 10/12頁 |
| 文件大?。?/td> | 262K |
| 代理商： | MIC2546-1BTS |
MIC2546/2547
Functional Description
The MIC2546 and MIC2547 are dual high-side N-channel
switches available with active-high or active-low enable in-
puts. Fault conditions turn off or inhibit turn-on of the output
transistor and activate the open-drain error flag transistor
making it sink current to ground.
Input and Output
INX is the power supply connection to the logic circuitry and
the drain of the output MOSFET. OUTX is the source of the
output MOSFET. In a typical circuit, current flows from INX to
OUTX toward the load. If V
OUT
is greater than V
IN
, current will
flow from OUTX to INX since the switch is bidirectional when
enabled. The output MOSFET and driver circuitry are also
designed to allow the MOSFET source to be externally forced
to a higher voltage than the drain (V
OUT
> V
IN
) when the
switch is disabled. In this situation, the MIC2546/47 avoids
undesirable current flow from OUTX to INX. Both OUT pins
for a given channel must be connected together.
Thermal Shutdown
Thermal shutdown shuts off the output MOSFET and signals
the fault flag if the die temperature exceeds 140
°
C. 10
°
C of
hysteresis prevents the switch from turning on until the die
temperature drops to 130
°
C. Overtemperature detection
functions only when the switch is enabled.
The MIC2547 features an internal latch which causes the part
to remain off after thermal shutdown until a reset pulse is
provided via the enable pin. While in current-limit, the thermal
shutdown latch prevents on/off cycling of the output. Refer to
Figure 2 for timing diagram. The flag remains low until reset.
Enable Input
ENX must be driven logic high or logic low, or be pulled high
or low for a clearly defined input. Floating the input may cause
unpredictable operation. ENX should not be allowed to go
negative with respect to GND, and V
ENX
should be less than
or equal to V
INX
.
Micrel
MIC2546/2547
10
June 2000
Adjustable Current-Limit
The short-circuit current-limit is user-adjustable with an exter-
nal set resistor. Current-limit in the range of 100mA to 1.5A is
available with a set point accuracy of better than
±
20%. The
current-limit circuit prevents damage to the output MOSFET
and external load.
The nominal current-limit value is set with an external resistor
between ILIMX and GND. For a desired current-limit, the
value of the external set resistor is given by:
R
230V
I
SETX
LIMITX
=
where:
154
< R
SET
< 2.29k
For example, to set a 1A nominal current-limit, R
SET
is
calculated as:
230V
1A
230
=
Current through R
SETX
increases with OUT current. The
voltage across R
SETX
could be monitored with a high imped-
ance comparator to provide an indication of output current.
R
SETX
should be between 154
and 2.29k
(0.5% resistor
value).
Short-Circuit Protection
In the event of a short-circuit, the output current will fold back
to approximately 80% of the short-circuit current-limit.
Fault Flag
FLGX is an N-channel, open-drain MOSFET output. The
fault-flag is active (low) for current-limit or thermal shutdown
conditions. The flag output MOSFET is capable of sinking a
10mA load to typically 100mV above ground.
相關PDF資料 |
PDF描述 |
|---|---|
| MIC2546-2BM | Dual Programmable Current Limit Switch Preliminary Information |
| MIC2546-2BTS | Replaced by PT6522 : |
| MIC2547-1BM | Replaced by PT6522 : |
| MIC2547-1BTS | Dual Programmable Current Limit Switch Preliminary Information |
| MIC2547-2BM | Replaced by PT6522 : |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MIC2546-1BTS TR | 功能描述:IC SW CURR LIMIT DUAL 16-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅動器 - 內部開關 系列:- 標準包裝:1 系列:- 類型:高端 輸入類型:非反相 輸出數:1 導通狀態(tài)電阻:85 毫歐 電流 - 輸出 / 通道:2A 電流 - 峰值輸出:6A 電源電壓:1.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:4-UFDFN 裸露焊盤，4-TMLF? 供應商設備封裝:4-TMLF?（1.2x1.6） 包裝:剪切帶 (CT) 其它名稱:576-1574-1 |
| MIC2546-1YM | 功能描述:電源開關 IC - USB Dual Programmable Current Limit Single High-Side Switch - Lead Free RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| MIC2546-1YM TR | 功能描述:電源開關 IC - USB Dual Programmable Current Limit Single High-Side Switch - Lead Free RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| MIC2546-1YTS | 功能描述:電源開關 IC - USB Dual Programmable Current Limit Single High-Side Switch - Lead Free RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| MIC2546-1YTS TR | 功能描述:電源開關 IC - USB Dual Programmable Current Limit Single High-Side Switch - Lead Free RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復。