636S, 636T, 6370 Selling Leads, Datasheet
MFG:ytlic Package Cooled:QFN-16 D/C:09+
636S, 636T, 6370
- Table of contents:
Info of 636S
Info of 636T
Info of 6370
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About 63719
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6370 General Description
The LM1577-ADJ is a monolithic integrated circuit that provides all of the power and control functions for set-up (boost), flyback, and forward converter switching regulators.Requiring a minimum number of external components, this regulator is cost effective, and simple to use.
Included on the chip is a 3.0A NPN switch and its associated protection circuitry,consisting of current and thermal limiting, and undervoltage lockout. Other features include a 52kHz fixed-frequency oscillator that requires no external components, a soft start mode to reduce in-rush current during start-up and current mode control for improved rejection of input voltage and output load transients.
6370 Maximum Ratings
Supply Voltage
45V
Output Switch Voltage
65V
Output Switch Current
(Note 2)
6.0A
Power Dissipation
Internally Limited
Storage Temperature Range
-65 C to +150 C
Lead Temperature
(Soldering, 10 seconds) 260 C
Maximum Junction Temperature
150 C
Thermal Resistance
ThetaJA
TO3 (Still Air) 38 C/W
TO3 (500LF/Min Air flow) 15.5 C/W
MD078 (Still Air) 57 C/W
MD078 (500LF/Min Air flow) 16 C/W
ThetaJC
TO3 2.0 C/W
MD078 1.6 C/W
Minimum ESD Rating
(Note 3)
2kV
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.Operating ratings indicate conditions for which the device is intended to be functional, but device parameter specifications may not be guaranteed under these conditions. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: Due to timing considerations of the LM1577 current limit circuit, output current cannot be internally limited when the LM1577 is used as a set-up regulator. To prevent damage to the switch, its current must be externally limited to 6.0A. However, output current is internally limited when the LM1577 is used as a flyback or forward converter regulator in accordance to the Application Hints.
Note 3: Human body model, 1.5K Ohm in series with 100pF.
6370 Features
- Requires few external components
- NPN output switches 3.0A, can stand off 65V
- Wide input voltage range: 3.5V to 40V
- Current-mode operation for improved transient response, line regulation, and current limit
- 52kHz internal oscillator
- Soft-start function reduces in-rush current during start-up
- Output switch protected by current limit, under-voltage lockout, and thermal shutdown
- NPN output switches 3.0A, can stand off 65V
- Wide input voltage range: 3.5V to 40V
- Current-mode operation for improved transient response, line regulation, and current limit
- 52kHz internal oscillator
- Soft-start function reduces in-rush current during start-up
- Output switch protected by current limit, under-voltage lockout, and thermal shutdown
6370 Typical Application
- Simple boost regulator
- Flyback and forward regulators
- Multiple-output regulator
- Flyback and forward regulators
- Multiple-output regulator
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