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کنترل کننده PWM
LD7550BBL CODE:50X SOT23-6
Low-Cost, Green-Mode PWM Controller for Flyback Converters
کیفیت: ORIGINAL(distributor) پکیج: SOT-23-6
قیمت تک فروشی 179,022 ریال
قیمت عمده 170,536 ریال (10 به بالا)
قیمت ویژه 167,141 ریال (100 به بالا)
قیمت فوق العاده165,443 ریال (1000 به بالا)
 قیمت تک فروشی 0.168 تتر با تخفیف
0.940.890.870.86
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| حداکثر دماي کاري |
150 سانتيگراد |
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| حداقل دماي کاري |
55- سانتيگراد |
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| شرکت توليد کننده |
Fairchild |
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توضیحات
Description
Parameter Symbol Min Typ Max Unit
Input Voltage VIN 4.5 - 36 V
Output Voltage VOUT 1.23 - 18 V
Output Current IOUT - 1.5 3 A
Quiescent Current IQ - 0.02 0.05 A
Dropout Voltage VDROPOUT - 0.8 1.5 V
Operating Temperature TOPR -40 - 125 °C
Storage Temperature TSTG -65 - 150 °C
Thermal Resistance (?JA) ?JA - 45 - °C/W
Instructions for Use:
Input Voltage (VIN):
Ensure the input voltage is within the range of 4.5V to 36V.
Do not exceed the maximum input voltage to avoid damage to the device.
Output Voltage (VOUT):
The output voltage can be adjusted between 1.23V and 18V.
Use external resistors to set the desired output voltage according to the formula provided in the datasheet.
Output Current (IOUT):
The typical output current is 1.5A, with a maximum of 3A.
Ensure the load does not exceed the maximum output current to prevent overheating or damage.
Quiescent Current (IQ):
The quiescent current is typically 20mA and can reach up to 50mA.
This current is drawn by the regulator even when there is no load.
Dropout Voltage (VDROPOUT):
The dropout voltage is typically 0.8V and can reach up to 1.5V.
Ensure the input voltage is at least this much higher than the output voltage to maintain regulation.
Operating Temperature (TOPR):
The operating temperature range is from -40°C to 125°C.
Avoid operating the device outside this range to ensure reliable performance.
Storage Temperature (TSTG):
The storage temperature range is from -65°C to 150°C.
Store the device in a dry environment to prevent moisture damage.
Thermal Resistance (?JA):
The thermal resistance is typically 45°C/W.
Use a heatsink if the device will operate at high power levels to improve heat dissipation.
PCB Layout:
Place the input and output capacitors close to the regulator to minimize noise and improve stability.
Use wide traces for the input and output paths to reduce resistance and inductance.
Capacitors:
Use ceramic capacitors for the input and output to ensure stability and low ESR.
Recommended values are 10?F for the input and 10?F for the output.
Protection:
The device includes overcurrent and thermal protection.
In case of overcurrent, the output will be shut down until the condition is resolved.
If the device exceeds its thermal limit, it will shut down to prevent damage.
Testing:
Before finalizing the design, test the regulator under various conditions to ensure it meets the required specifications.
Monitor the output voltage and current to ensure stability and proper operation.
(For reference only)
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