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參數(shù)資料
| 型號： | AP393SG-U |
| 廠商： | Diodes Inc |
| 文件頁數(shù)： | 12/15頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC COMP DUAL LOW POWER 8-SOIC |
| 標準包裝： | 100 |
| 類型： | 通用 |
| 元件數(shù)： | 2 |
| 輸出類型： | CMOS，DTL，ECL，MOS，開路集電極，TTL |
| 電壓 - 電源，單路/雙路(±)： | 2 V ~ 36 V，±1 V ~ 18 V |
| 電壓 - 輸入偏移（最小值）： | 5mV @ 5V |
| 電流 - 輸入偏壓（最小值）： | 0.25µA @ 5V |
| 電流 - 輸出（標準）： | 16mA @ 5V |
| 電流 - 靜態(tài)（最大值）： | 2.5mA |
| 工作溫度： | 0°C ~ 70°C |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 安裝類型： | 表面貼裝 |
| 包裝： | 帶卷 (TR) |
AP393A
LOW POWER LOW OFFSET VOLTAGE DUAL
COMPARATORS
AP393A Rev. 7
6 of 15
FEBRUARY 2009
Diodes Incorporated
Application Information
The AP393A is high gain, wide bandwidth devices, like most comparators, can easily oscillate if the output lead is inadvertently
allowed to capacitively couple to the inputs via stray capacitance. This shows up only during the output voltage transition intervals as the
comparator change states. Power supply bypassing is not required to solve this problem. Standard PC board layout is helpful as it
reduces stray input-output coupling. Reducing the input resistors to < 10k
reduces the feedback signal levels and finally, adding even a
small amount (1.0 to 10 mV) of positive feedback (hysteresis) causes such a rapid transition that oscillations due to stray feedback are
not possible. Simply socketing the IC and attaching resistors to the pins will cause input-output oscillations during the small transition
intervals unless hysteresis is used. If the input signal is a pulse waveform, with relatively fast rise and fall times, hysteresis is not required.
All input pins of any unused comparators should be tied to the negative supply.
The bias network of the AP393A establishes a drain current independent of the magnitude of the power supply voltage over the
range of from 2.0 VDC to 30 VDC. It is usually unnecessary to use a bypass capacitor across the power supply line.
The differential input voltage may be larger than V+ without damaging the device (Note 10). Protection should be provided to
prevent the input voltages from going negative more than -0.3 VDC (at 25°C). An input clamp diode can be used as shown in the
applications section.
The output of the AP393A is the uncommitted collector of a grounded-emitter NPN output transistor. Many collectors can be tied
together to provide an output OR’ing function. An output pull-up resistor can be connected to any available power supply voltage within
the permitted supply voltage range and there is no restriction on this voltage due to the magnitude of the voltage applied to the
V
+ terminal of the AP393A package. The output can also be used as a simple SPST switch to ground (when a pull-up resistor is not used).
The amount of current the output device can sink is limited by the drive available (which is independent of V
+) and the β of this device.
When the maximum current limit is reached (approximately 16mA), the output transistor will come out of saturation and the output voltage
will rise very rapidly. The output saturation voltage is limited by the approximately 60
rSAT of the output transistor. The low offset voltage
of the output transistor (1.0 mV) allows the output to clamp essentially to ground level for small load currents.
Typical Circuit
( VCC = 5.0VDC )
VO
3.0K
V
+
+VIN
+VREF
Basic Comparator
+
-
AP393A
Driving CMOS
+
-
+5.0VDC
100K
AP393A
1/4 MM54CXX
Driving TTL
+
-
AP393A
1/4 DM54XX
+5VDC
10K
+
-
VO
100K
75 pF
4.3K
V
+
V
+
V
+
Squarewave Oscillator
1:100KHz
1/2 AP393A
0
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| AP3968 | 制造商:BCDSEMI 制造商全稱:BCD Semiconductor Manufacturing Limited 功能描述:Primary Side Power Switcher for Off-line SMPS Low Total Cost Solution |
| AP3968DMTR-G1 | 功能描述:Converter Offline Flyback Topology 60kHz 7-SOIC 制造商:diodes incorporated 系列:- 包裝:帶卷（TR） 零件狀態(tài):過期 輸出隔離:隔離 內(nèi)部開關(guān):是 電壓 - 擊穿:- 拓撲:回掃 電壓 - 啟動:15V 電壓 - 電源（Vcc/Vdd）:5.3 V ~ 22 V 占空比:- 頻率 - 開關(guān):60kHz 功率（W）:4W 故障保護:超溫，短路 控制特性:- 工作溫度:-40°C ~ 85°C（TA） 封裝/外殼:8-SOIC（0.154"，3.90mm 寬）7 引線 供應商器件封裝:7-SOIC 安裝類型:表面貼裝 標準包裝:4,000 |
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