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參數(shù)資料
| 型號(hào)： | TL5002ID |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | GREEN, PLASTIC, SOIC-8 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 481K |
| 代理商： | TL5002ID |
TL5002
PULSEWIDTHMODULATION CONTROL CIRCUIT
SLVS304A SEPTEMBER 2000 REVISED AUGUST 2002
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
dead-time control (DTC) (continued)
R
DT +
Rt ) 1250 D Voscmax – Voscmin ) Voscmin
Where
RDT and Rt are in ohms, D in decimal
Soft start can be implemented by paralleling the DTC resistor with a capacitor (CDT) as shown in Figure 2. During
soft start, the voltage at DTC is derived by the following equation:
V
DT [
I
DT
R
DT
1–e
–t R
DT
C
DT
TL5002
DTC
CDT
RDT
6
Figure 2. Soft-Start Circuit
If the dc-to-dc converter must be in regulation within a specified period of time, the time constant, RDTCDT,
should be t0/3 to t0/5. The TL5002 remains off until VDT ≈ 0.7 V, the minimum ramp value. CDT is discharged
every time UVLO becomes active.
undervoltage-lockout (UVLO) protection
The undervoltage-lockout circuit turns the output transistor off whenever the supply voltage drops too low
(approximately 3 V at 25
°C) for proper operation. A hysteresis voltage of 200 mV eliminates false triggering on
noise and chattering.
output transistor
The output of the TL5002 is an open-collector transistor with a maximum collector current rating of 21 mA and
a voltage rating of 51 V. The output is turned on under the following conditions: the oscillator triangle wave is
lower than both the DTC voltage and the error-amplifier output voltage, and the UVLO circuit is inactive.
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相關(guān)代理商/技術(shù)參數(shù) |
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| TL5002IDG4 | 功能描述:DC/DC 開關(guān)控制器 Voltage Tracking Termination Regulatr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TL5002IDR | 功能描述:DC/DC 開關(guān)控制器 Voltage Tracking Termination Regulatr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TL5002IDRG4 | 功能描述:DC/DC 開關(guān)控制器 Voltage Tracking Termination Regulatr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TL50048 | 功能描述:線性和開關(guān)式電源 500W 48V 10A RoHS:否 制造商:TDK-Lambda 產(chǎn)品:Switching Supplies 開放式框架/封閉式:Enclosed 輸出功率額定值:800 W 輸入電壓:85 VAC to 265 VAC 輸出端數(shù)量:1 輸出電壓（通道 1）:20 V 輸出電流（通道 1）:40 A 商用/醫(yī)用: 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:Rack 長度: 寬度: 高度: |
| TL500C | 制造商:TI 制造商全稱:Texas Instruments 功能描述:ANALOG TO DIGITAL CONVERTER BUILDING BLOCKS |
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