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參數(shù)資料
| 型號(hào)： | KA3502 |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | PC SMPS Supervisory IC |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDIP20 |
| 封裝： | DIP-20 |
| 文件頁(yè)數(shù)： | 3/14頁(yè) |
| 文件大?。?/td> | 89K |
| 代理商： | KA3502 |
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KA3502
3
Pin Description
Pin Number
1
2
3
Pin Name
V33
V5
V12
Pin Function Descrition
+3.3 V Output Voltage of SMPS Secondary side
+5 V Output Voltage of SMPS Secondary side
+12 V Output Voltage of SMPS Secondary side
Adjustable OVP Input. Its Threshold Voltage is 1.26 V. This pin can be used for
another
protection signal.
Supply Voltage. Operating range is 15 V ~ 24 V. Vcc=18 V, Ta=25
°
C at test.
Remote On/Off Output. This signal controls the primary power switch (PWM IC)
through an Opto-coupler.
Maximum current rating is 30 mA. When PWM="Low", the main SMPS is operational
and If PWM="High", the main SMPS is turned-off.
Remote On/Off Input. It is TTL operation and its threshold voltage is 1.4 V. Voltage at
this pin can reach normally 4.6 V, with absolutely maximum voltage, 5.25 V. If
REM="Low", PWM="Low". That means the main SMPS is operational. When REM
="High", then PWM="High" and the main SMPS is turned-off.
Remote On/Off delay. Ton/Toff=8 ms/24 ms (Typ.) with Ctrem=0.1uF. Its High/Low
threshold voltage is 2 V/0.7 V and the maximum voltage after full charging is about
2.8 V. So,
V (Chg.) = 2 V,
V (Dischg.) = 2.1 V Typ.
Power Good output signal. PG="High" means that the power is "Good" for operation
and PG="Low" means "Power Fail".
PG Delay. Td=250 ms (Typ.) with Ctopr=2.2uF. The High/Low threshold voltage are
2 V/1.3 V and the voltage of PIN 10 is clamped at 5.2 V for Noise margin.
Under-Voltage Detect Pin. Its threshold voltage is 1.26V
±
20mV Typ.
Feedback for Precision Reference2. Absolute min/max current rating is 1 mA/30 mA.
Precision Reference 2 input Voltage. This circuit equals to KA431 and it is designed
for an Auxiliary voltage,
+5 Vs. It is trimmed to
±
1.6%.
Precision Reference 1 Input Voltage. This circuit equals to KA431 and it is for
corrective output voltages of +5 V/+12 V. It's trimmed to
±
1.6%.
Feedback for Precision Reference1. Absolute min/max current rating is 2 mA/30 mA
because of
internal connection.
Ground
Timing pin for Over Current Protection blank-out time. Its threshold voltage is 2 V and
clamped at 2.7 V after full charging. Target of delay time is 20 ms~30 ms and it is
realized through external R & C.
Current Sense Input for +12V. This pin is connected to the Current Sensing resistor
or inductor. If the voltage drop of the resistor or inductor is larger than the fixed offset
voltage ( 65 mV Typ.), PWM becomes "High" after some delay and the main SMPS
is turned-off.
Current Sense Input for +5 V. The OCP Offset voltage for +5 V is 50 mV
Current Sense Input for +3.3 V. The OCP Offset voltage for +3.3 V is 135 mV
4
ADJ
5
VCC
6
PWM
7
REM
8
Trem
9
PG
10
Topr
11
12
UV
FB2
13
VREF2
14
VREF1
15
FB1
16
GND
17
Tsur
18
IS12
19
20
IS5
IS33
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PDF描述 |
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| KA3504 | PC SMPS Supervisory IC |
| KA3505 | PC SMPS Supervisory IC |
| KA350 | 3-Terminal 3A Positive Adjustable Voltage Regulator |
| KA3511 | PC POWER SUPPLY DESIGN WITH KA3511 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KA3504 | 功能描述:監(jiān)控電路 Supervisor IC SMPS RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| KA3505 | 功能描述:監(jiān)控電路 PC SMPS Sup. IC RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| KA350TU | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 3a Pos Voltage Reg 3Term adjustable RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| KA3511 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:PC POWER SUPPLY DESIGN WITH KA3511 |
| KA3511BS | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Intelligent Voltage Mode PWM IC |
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