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參數資料
| 型號： | L6590AN |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數： | 16/19頁 |
| 文件大?。?/td> | 236K |
| 代理商： | L6590AN |
L6590A
16/19
At turn-on, there are large current spikes due to the discharge of parasitic capacitances and, in case of Contin-
uos Conduction Mode operation, to secondary diode reverse recovery as well, which could falsely trigger the
OCP comparator. To increase noise immunity the output of the OCP comparator is blanked for a short time
(about120 ns)just afterthe MOSFETis turnedon, sothat anydisturbance within thistimeslotis rejected (Lead-
ing Edge Blanking).
Figure 31. OCP internal schematic
Thermal Shutdown
Overheating of the device due to an excessive power throughput or insufficient heatsinking is avoided by the
Thermal Shutdown function. A thermal sensor monitors the junction temperature close to the power MOSFET
and, when the temperature exceeds 150 °C (min.), sets an alarm signal that stops the operation of the device.
This is a not-latched funtion and the power MOSFET is re-enabled as the temperature falls about 40 °C.
Clock
+
-
DRAIN
GND
1
1/100
S
R
Q
Max. Duty cycle
OSCILLATOR
PWM
Driver
Rsense
OCP
+
-
0.5 V
LEB
Clock
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| L6590D | 功能描述:開關變換器、穩(wěn)壓器與控制器 700 Volt Monolithic RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L6590D013TR | 功能描述:開關變換器、穩(wěn)壓器與控制器 700 Volt Monolithic RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L6590ED | 功能描述:功率因數校正 IC STEP DOWN SWITCH REG RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L6590ED013TR | 功能描述:功率因數校正 IC STEP DOWN SWITCH REG RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| L6590N | 功能描述:開關變換器、穩(wěn)壓器與控制器 700 Volt Monolithic RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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