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參數(shù)資料
| 型號(hào)： | TK70002 |
| 廠(chǎng)商： | TOKO Inc. |
| 英文描述： | SINGLE INPUT, TWO OUTPUT SOLID STATE SWITCH |
| 中文描述： | 單輸入，兩個(gè)輸出固態(tài)開(kāi)關(guān) |
| 文件頁(yè)數(shù)： | 5/7頁(yè) |
| 文件大?。?/td> | 56K |
| 代理商： | TK70002 |
January 1999 TOKO, Inc.
Page 5
TK70002
DEFINITION AND EXPLANATION OF TECHNICAL TERMS
PACKAGE POWER DISSIPATION (P
D
)
This is the power dissipation level at which the thermal
sensor is activated. The IC contains an internal thermal
sensor which monitors the junction temperature. When the
junction temperature exceeds the monitor threshold of
150
°
C, the IC is shut down. The junction temperature
rises as the difference between the input power (V
IN
x I
IN
)
and the output power (V
OUT
x I
OUT
) increases. The rate of
temperature rise is greatly affected by the mounting pad
configuration on the PCB, the board material, and the
ambient temperature. When the IC mounting has good
thermal conductivity, the junction temperature will be low
even if the power dissipation is great. When mounted on
the recommended mounting pad, the power dissipation of
the SOT-23-6 is increased to 350 mW. For operation at
ambient temperatures over 25
°
C, the power dissipation of
the SOT-23-6 device should be derated at 2.8 mW/
°
C. To
determine the power dissipation for shutdown when
mounted, attach the device on the actual PCB and
deliberately increase the
output current (or raise the input
voltage) until the thermal protection circuit is activated.
Calculate the power dissipation of the device by subtracting
the output power from the input power. These
measurements should allow for the ambient temperature
of the PCB. The value obtained from P
D
/(150
°
C - T
A
) is the
derating factor. The PCB mounting pad should provide
maximum thermal conductivity in order to maintain low
device temperatures. As a general rule, the lower the
temperature, the better the reliability of the device. The
thermal resistance when mounted is expressed as follows:
T
j
= 0
jA
x P
D
+ T
A
For Toko ICs, the internal limit for junction temperature is
150
°
C. If the ambient temperature (T
A
) is 25
°
C, then:
150
°
C = 0
jA
x P
D
+ 25
°
C
0
jA
= 125
°
C/ P
D
P
D
is the value when the thermal sensor is activated. A
simple way to determine P
D
is to calculate V
IN
x I
IN
when
the output side is shorted. Input current gradually falls as
temperature rises. You should use the value when thermal
equilibrium is reached.
DROPOUT VOLTAGE (V
DROP
)
The output voltage decreases with the increase of output
current. It is dependent upon the load current and the
junction temperature. It measures the differential voltage
between the input voltage and the output voltage when the
input voltage is set to 2.5 V and the output current is set to
50 mA.
OUTPUT CURRENT (I
OUT
)
The rated output current is specified under the condition
where the output voltage drops 0.5 V below the no load
value. The input voltage is set to 2.5 V, and the current is
pulsed to minimize temperature effects.
QUIESCENT CURRENT (I
Q
)
The quiescent current is the current which flows through
the ground terminal under no load conditions (I
OUT
= 0 mA)
with V
IN
= 2.5 V and excludes the control pin current.
STANDBY CURRENT (I
STBY
)
Standby current is the current which flows into the solid
state switch when the output is turned off by the control
function (V
CONT
= 0 V). It is measured with V
IN
= 8 V.
GROUND CURRENT (I
GND
)
Ground current is the current which flows through the
ground pin(s). It is defined as I
IN
- I
OUT
, excluding control
current.
ON/OFF CONTROL
High is “on” (referenced to ground). The input current is at
the pA level by connecting the control terminal to ground.
REVERSE VOLTAGE PROTECTION
Reverse voltage protection prevents damage due to the
output voltage being higher than the input voltage. This
fault condition can occur when the output capacitor remains
charged and the input is reduced to zero, or when an
external voltage higher than the input voltage is applied to
the output side.
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| TK70002MCB | SINGLE INPUT, TWO OUTPUT SOLID STATE SWITCH |
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| TK70003MCB | SINGLE OUTPUT, TWO INPUT SOLID STATE SWITCH |
| TK70110M | 1.0 V LOW DROPOUT LINEAR REGULATOR |
| TK70110MBX | 1.0 V LOW DROPOUT LINEAR REGULATOR |
相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| TK70002MCB | 制造商:TOKO 制造商全稱(chēng):TOKO, Inc 功能描述:SINGLE INPUT, TWO OUTPUT SOLID STATE SWITCH |
| TK70002MCB/02S | 制造商:TOKO 制造商全稱(chēng):TOKO, Inc 功能描述:SINGLE INPUT, TWO OUTPUT SOLID STATE SWITCH |
| TK70003 | 制造商:TOKO 制造商全稱(chēng):TOKO, Inc 功能描述:SINGLE OUTPUT, TWO INPUT SOLID STATE SWITCH |
| TK70003MCB | 制造商:TOKO 制造商全稱(chēng):TOKO, Inc 功能描述:SINGLE OUTPUT, TWO INPUT SOLID STATE SWITCH |
| TK70003MCB/03S | 制造商:TOKO 制造商全稱(chēng):TOKO, Inc 功能描述:SINGLE OUTPUT, TWO INPUT SOLID STATE SWITCH |
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