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UC1851J датащи(PDF) 6 Page - Texas Instruments

номер детали UC1851J
подробное описание детали  Programmable, Off-Line, PWM Controller
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

UC1851J датащи(HTML) 6 Page - Texas Instruments

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UC1851
UC2851
UC3851
OPEN-LOOP CIRCUIT
High Peak currents associated with capacitive loads necessitate careful grounding techniques. Timing and bypass
capacitors should be connected close to pin 13 in a single ground point.
Programmable Soft Start and Restart Delay Circuit
For further application information see UC1840/UC1841
Data Sheets
UC1851 Power MOSFET Drive Interface
UNITRODE INTEGRATED CIRCUITS
7 CONTINENTAL BLVD.
• MERRIMACK, NH 03054
TEL. (603) 424-2410
• FAX (603) 424-3460
Nominal Frequency =
1
RTCT
= 50kHz
Start Voltage = 3
R1
+ R2 + R3
R2
+ R3
+0.2R1 = 12V
UV Fault Voltage
= 3
R1
+ R2 + R3
R2
+ R3
= 8V
OV Fault Voltage
= 3
R1
+ R2 + R3
R3
= 32V
Current Limit = 200mV
Current Fault Voltage = 600mV
Duty Cycle Clamp = 50%
@VIN = 15V, Duty Cycle = 48%
@VIN = 30V, Duty Cycle = 24%
6


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