參數(shù)資料
型號(hào)： TL494CNSE4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 0.25 A SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16
封裝： GREEN, PLASTIC, SOP-16
文件頁(yè)數(shù)： 15/20頁(yè)
文件大?。?/td> 616K
代理商： TL494CNSE4
www.ti.com
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Electrical Characteristics
Reference Section
Oscillator Section
Error-Amplifier Section
TL494
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS074E – JANUARY 1983 – REVISED FEBRUARY 2005
over recommended operating free-air temperature range, VCC = 15 V, f = 10 kHz (unless otherwise noted)
TL494C, TL494I
PARAMETER
TEST CONDITIONS(1)
UNIT
MIN TYP(2)
MAX
Output voltage (REF)
IO = 1 mA
4.75
5
5.25
V
Input regulation
VCC = 7 V to 40 V
2
25
mV
Output regulation
IO = 1 mA to 10 mA
1
15
mV
Output voltage change with temperature
T
A = MIN to MAX
2
10
mV/V
Short-circuit output current(3)
REF = 0 V
25
mA
(1)
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
(2)
All typical values, except for parameter changes with temperature, are at TA = 25°C.
(3)
Duration of short circuit should not exceed one second.
C
T = 0.01 F, RT = 12 k (see Figure 1)
TL494C, TL494I
PARAMETER
TEST CONDITIONS(1)
UNIT
MIN TYP(2)
MAX
Frequency
10
kHz
Standard deviation of frequency(3)
All values of VCC, CT, RT, and TA constant
100
Hz/kHz
Frequency change with voltage
VCC = 7 V to 40 V, TA = 25°C
1
Hz/kHz
Frequency change with temperature(4)
T
A = MIN to MAX
10
Hz/kHz
(1)
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
(2)
All typical values, except for parameter changes with temperature, are at TA = 25°C.
(3)
Standard deviation is a measure of the statistical distribution about the mean as derived from the formula:
(4)
Temperature coefficient of timing capacitor and timing resistor are not taken into account.
TL494C, TL494I
PARAMETER
TEST CONDITIONS
UNIT
MIN TYP(1)
MAX
Input offset voltage
VO (FEEDBACK) = 2.5 V
2
10
mV
Input offset current
VO (FEEDBACK) = 2.5 V
25
250
nA
Input bias current
VO (FEEDBACK) = 2.5 V
0.2
1
A
–0.3 to
Common-mode input voltage range
VCC = 7 V to 40 V
V
VCC – 2
Open-loop voltage amplification
V
O = 3 V, VO = 0.5 V to 3.5 V, RL = 2 k
70
95
dB
Unity-gain bandwidth
VO = 0.5 V to 3.5 V, RL = 2 k
800
kHz
Common-mode rejection ratio
V
O = 40 V, TA = 25°C
65
80
dB
Output sink current (FEEDBACK)
VID = –15 mV to –5 V, V (FEEDBACK) = 0.7 V
0.3
0.7
mA
Output source current (FEEDBACK)
VID = 15 mV to 5 V, V (FEEDBACK) = 3.5 V
–2
mA
(1)
All typical values, except for parameter changes with temperature, are at TA = 25°C.
4
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TL494CNSRG4 功能描述:電壓模式 PWM 控制器 Control Circuit RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
TL494CPW 功能描述:電壓模式 PWM 控制器 Control Circuit RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
TL494CPWE4 功能描述:電壓模式 PWM 控制器 Control Circuit RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
TL494CPWG4 功能描述:電壓模式 PWM 控制器 Control Circuit RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
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