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参数资料
| 型号： | L6590AN |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 0.7 A SWITCHING REGULATOR, 74 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封装： | MINI, DIP-8 |
| 文件页数： | 8/19页 |
| 文件大小： | 289K |
| 代理商： | L6590AN |
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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
(about 120 ns) just after the MOSFET is turned on, so that any disturbance within this time slot is 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6590D | 功能描述:开关变换器、稳压器与控制器 700 Volt Monolithic RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L6590D013TR | 功能描述:开关变换器、稳压器与控制器 700 Volt Monolithic RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L6590ED | 功能描述:功率因数校正 IC STEP DOWN SWITCH REG RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| L6590ED013TR | 功能描述:功率因数校正 IC STEP DOWN SWITCH REG RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| L6590N | 功能描述:开关变换器、稳压器与控制器 700 Volt Monolithic RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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