參數(shù)資料
型號(hào)： NCV494
廠商： ON SEMICONDUCTOR
英文描述： SWITCHMODE Pulse Width Modulation Control Circuit(開關(guān)模式PWM控制器)
中文描述： 開關(guān)模式脈寬調(diào)制控制電路（開關(guān)模式的PWM控制器）
文件頁(yè)數(shù)： 2/14頁(yè)
文件大小： 144K
代理商： NCV494
TL494, NCV494
http://onsemi.com
2
RECOMMENDED OPERATING CONDITIONS
Characteristics
Symbol
Min
Typ
Max
Unit
Power Supply Voltage
V
CC
7.0
15
40
V
Collector Output Voltage
V
C1
, V
C2
30
40
V
Collector Output Current (Each transistor)
I
C1
, I
C2
200
mA
Amplified Input Voltage
V
in
0.3
V
CC
2.0
V
Current Into Feedback Terminal
l
fb
0.3
mA
Reference Output Current
l
ref
10
mA
Timing Resistor
R
T
1.8
30
500
k
Timing Capacitor
C
T
0.0047
0.001
10
F
Oscillator Frequency
f
osc
1.0
40
200
kHz
ELECTRICAL CHARACTERISTICS
(V
CC
= 15 V, C
T
= 0.01 F, R
T
= 12 k , unless otherwise noted.)
For typical values T
A
= 25
°
C, for min/max values T
A
is the operating ambient temperature range that applies, unless otherwise noted.
Characteristics
Symbol
Min
Typ
Max
Unit
REFERENCE SECTION
Reference Voltage (I
O
= 1.0 mA)
V
ref
4.75
5.0
5.25
V
Line Regulation (V
CC
= 7.0 V to 40 V)
Reg
line
2.0
25
mV
Load Regulation (I
O
= 1.0 mA to 10 mA)
Reg
load
3.0
15
mV
Short Circuit Output Current (V
ref
= 0 V)
I
SC
15
35
75
mA
OUTPUT SECTION
Collector OffState Current
(V
CC
= 40 V, V
CE
= 40 V)
I
C(off)
2.0
100
A
Emitter OffState Current
V
CC
= 40 V, V
C
= 40 V, V
E
= 0 V)
I
E(off)
100
A
CollectorEmitter Saturation Voltage (Note 2)
CommonEmitter (V
E
= 0 V, I
C
= 200 mA)
EmitterFollower (V
C
= 15 V, I
E
= 200 mA)
V
sat(C)
V
sat(E)
1.1
1.5
1.3
2.5
V
Output Control Pin Current
Low State (V
OC
High State (V
OC
= V
ref
)
0.4 V)
I
OCL
I
OCH
10
0.2
3.5
A
mA
Output Voltage Rise Time
CommonEmitter (See Figure 12)
EmitterFollower (See Figure 13)
t
r
100
100
200
200
ns
Output Voltage Fall Time
CommonEmitter (See Figure 12)
EmitterFollower (See Figure 13)
t
f
25
40
100
100
ns
2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NCV4949 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:AC-DC Offline Switching Controllers/Regulators
NCV4949A 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:100 mA, 5.0 V, Low Dropout Voltage Regulator with Reset and Sense
NCV4949ADR2G 功能描述:低壓差穩(wěn)壓器 - LDO 5.0V 100 MA LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
NCV4949ADWR2G 功能描述:低壓差穩(wěn)壓器 - LDO 5.0V 100 MA LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
NCV4949APDR2G 功能描述:低壓差穩(wěn)壓器 - LDO 5.0V 100 MA LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
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