The Part Number is DP904C. The package is TO220-5P type.
The function of this semiconductor is PWM Controller.
Manufacturers : ETC
This device is a current mode pulse-width modulated (PWM) controller combined with a high-voltage power SenseFET in a single package. The PWM controller features integrated oscillator to be synchronized with the external sync signal, under-voltage lockout, optimized gate driver, temperature compensated precise current sources for the loop compensation.
1. Quasi Resonant Converter Controller 2. Internal Burst mode Controller for Stand-by mode 3. Pulse by pulse current limiting 4. Over current Latch protection
The LX1684 is a monolithic, voltage mode pulse-width modulator controller. It is designed to implement a flexible, low cost buck (step-down) regulator supply with a minimal of external components. Under-voltage lockout and soft-start provide for optimal start-up performance. The dual functionality of the soft-start pin causes the LX1684 to enter a shutdown mode when pulled to ground. The PWM switching frequency is fixed at 175kHz making the LX1684 optimized for low-cost components. In addition short-circuit current limiting can be implemented without expensive current sense resistors.
1. Fixed 175kHz Switching Frequency 2. Constant Frequency Voltage-Mode Control Requires NO External Compensation 3. Hiccup-Mode Over-Current Protection 4. High Efficiency 5. Adjustable Output Voltage Set By Resistor Divider 6. Under-Voltage Lockout 7. Soft-Start And Enable 8. Synchronous Rectification
1. 12V to 3.3V Or Less Buck Regulators 2. Microprocessor Core Supplies 3. Hard Disk Drives 4. General 3.3V Supplies 5. Computer Add-on Cards 6. General Purpose DC:DC Conversion 7. Graphic Cards
Other data sheets within the file : LX1684CD, LX1684CD-TR