HT44608
2019/1/2 17:45:54
詳細介紹
The HT44608N is a high performance voltage mode controller designed for off–line converters. This high voltage circuit that integrates the start–up current source and the oscillator capacitor, requires few external components while offering a high flexibility and reliability.
The device also features a very high efficiency stand–by management consisting of an effective Pulsed Mode operation. This technique enables the reduction of the stand–by power consumption to approximately 1.0 W while delivering 300 mW in a 150 W SMPS.
● Integrated Start–Up Current Source
● Lossless Off–Line Start–Up
● Direct Off–Line Operation
● Fast Start–Up
General Features
● Flexibility
● Duty Cycle Control
● Under-voltage Lockout with Hysteresis
● On Chip Oscillator Switching Frequency 40, 75, or 100 kHz
● Secondary Control with Few External Components
Protections
● Cycle by Cycle Current Limitation
● Demagnetization (Zero Current Detection) Protection
● “Over VCC Protection” Against Open Loop
● Programmable Low Inertia Over Voltage Protection
against Open Loop
● Internal Thermal Protection
SMPS Controller