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參數(shù)資料
| 型號(hào)： | L6590N |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | FULLY INTEGRATED POWER SUPPLY FIPS |
| 中文描述： | 完全集成的電源符合FIPS |
| 文件頁(yè)數(shù)： | 16/19頁(yè) |
| 文件大小： | 236K |
| 代理商： | L6590N |
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L6590A
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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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| L6598 | 功能描述:PMIC 解決方案 High Volt Reson Cont RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
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