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）
文件頁數(shù)： 3/14頁
文件大?。?/td> 144K
代理商： NCV494
TL494, NCV494
http://onsemi.com
3
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
ERROR AMPLIFIER SECTION
Input Offset Voltage (V
O (Pin 3)
= 2.5 V)
V
IO
2.0
10
mV
Input Offset Current (V
O (Pin 3)
= 2.5 V)
I
IO
5.0
250
nA
Input Bias Current (V
O (Pin 3)
= 2.5 V)
I
IB
0.1
1.0
A
Input Common Mode Voltage Range (V
CC
= 40 V, T
A
= 25
°
C)
V
ICR
0.3 to V
CC
2.0
V
Open Loop Voltage Gain ( V
O
= 3.0 V, V
O
= 0.5 V to 3.5 V, R
L
= 2.0 k )
A
VOL
70
95
dB
UnityGain Crossover Frequency (V
O
= 0.5 V to 3.5 V, R
L
= 2.0 k )
f
C
350
kHz
Phase Margin at UnityGain (V
O
= 0.5 V to 3.5 V, R
L
= 2.0 k )
m
65
deg.
Common Mode Rejection Ratio (V
CC
= 40 V)
CMRR
65
90
dB
Power Supply Rejection Ratio ( V
CC
= 33 V, V
O
= 2.5 V, R
L
= 2.0 k )
PSRR
100
dB
Output Sink Current (V
O (Pin 3)
= 0.7 V)
I
O
0.3
0.7
mA
Output Source Current (V
O (Pin 3)
= 3.5 V)
I
O
+
2.0
4.0
mA
PWM COMPARATOR SECTION
(Test Circuit Figure 11)
Input Threshold Voltage (Zero Duty Cycle)
V
TH
2.5
4.5
V
Input Sink Current (V
(Pin 3)
= 0.7 V)
I
I
0.3
0.7
mA
DEADTIME CONTROL SECTION
(Test Circuit Figure 11)
Input Bias Current (Pin 4) (V
Pin 4
= 0 V to 5.25 V)
I
IB (DT)
2.0
10
A
Maximum Duty Cycle, Each Output, PushPull Mode
(V
Pin 4
= 0 V, C
T
= 0.01 F, R
T
= 12 k )
(V
Pin 4
= 0 V, C
T
= 0.001 F, R
T
= 30 k )
DC
max
45
48
45
50
50
%
Input Threshold Voltage (Pin 4)
(Zero Duty Cycle)
(Maximum Duty Cycle)
V
th
0
2.8
3.3
V
OSCILLATOR SECTION
Frequency (C
T
= 0.001 F, R
T
= 30 k )
f
osc
40
kHz
Standard Deviation of Frequency* (C
T
= 0.001 F, R
T
= 30 k )
f
osc
3.0
%
Frequency Change with Voltage (V
CC
= 7.0 V to 40 V, T
A
= 25
°
C)
f
osc
( V)
0.1
%
Frequency Change with Temperature ( T
A
= T
low
to T
high
)
(C
T
= 0.01 F, R
T
= 12 k )
f
osc
( T)
12
%
UNDERVOLTAGE LOCKOUT SECTION
TurnOn Threshold (V
CC
increasing, I
ref
= 1.0 mA)
V
th
5.5
6.43
7.0
V
TOTAL DEVICE
Standby Supply Current (Pin 6 at V
ref
, All other inputs and outputs open)
(V
CC
= 15 V)
(V
CC
= 40 V)
I
CC
5.5
7.0
10
15
mA
Average Supply Current
(C
T
= 0.01 F, R
T
= 12 k , V
(Pin 4)
= 2.0 V)
(V
CC
= 15 V) (See Figure 12)
7.0
mA
* Standard deviation is a measure of the statistical distribution about the mean as derived from the formula,
N
n = 1
(X
n
X)
2
N 1
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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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