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參數(shù)資料
| 型號： | TL2845DRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | GREEN, PLASTIC, SOIC-14 |
| 文件頁數(shù)： | 23/23頁 |
| 文件大小： | 620K |
| 代理商： | TL2845DRG4 |
TL284x, TL384x
CURRENT-MODE PWM CONTROLLERS
SLVS038G JANUARY 1989 REVISED FEBRUARY 2008
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
DEAD TIME
vs
TIMING CAPACITANCE
Figure 4
s
100
40
10
4
0
CT Timing Capacitance nF
100
40
10
4
1
0.4
0.1
Dead
T
ime
VCC = 15 V
RT ≥ 5 k
TA = 25°C
TIMING RESISTANCE
vs
FREQUENCY
Figure 5
100
1 k
10 k
100 k
1 M
f Frequency Hz
R
T
T
iming
Resistance
k
100
40
10
4
1
VCC = 15 V
TA = 25°C
CT = 22 nF
CT = 47 nF
CT = 100 nF
CT = 10 nF
CT = 4.7 nF
CT = 2.2 nF
CT = 1 nF
open-loop laboratory test fixture
In the open-loop laboratory test fixture (see Figure 6), high peak currents associated with loads necessitate
careful grounding techniques. Timing and bypass capacitors should be connected close to the GND terminal
in a single-point ground. The transistor and 5-k
potentiometer sample the oscillator waveform and apply an
adjustable ramp to the ISENSE terminal.
2N2222
4.7 k
1 k
Error Amplifier
Adjust
4.7 k
5 k
ISENSE
Adjust
RT
100 k
COMP
VFB
ISENSE
RT/CT
REF
OUTPUT
GND
VCC
0.1
F
0.1
F
REF
VCC
OUTPUT
GND
1 k
, 1 W
A
CT
TL284x
TL384x
DUT
Figure 6. Open-Loop Laboratory Test Fixture
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TL2845DRG4-8 | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| TL2845P | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| TL2845PE4 | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| TL284X | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT-MODE PWM CONTROLLERS |
| TL284X_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT-MODE PWM CONTROLLERS |
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