General PWM-ICs
-
Status:Available
FA3647 is a PWM switching power supply control IC that can directly drive power MOSFETs. It uses a high-voltage CMOS device to achieve low power consumption. In addition, it incorporates a wide variety of functions, including a function that lowers the oscillation frequency to suppress generated losses under light loads, and an overvoltage protective function for the power supply (Vcc) pin. It is ideal for high-efficiency, power-saving power supplies that require low input power in standby/no-load mode.
Features
- Uses a newly developed CMOS process with high dielectric strength (30V) for implementing low power consumption
- Standby current of 2 A or less (at Vcc = 14V), and operating curre nt of 1.9mA (typ)
- Automatically reduces the oscillation frequency to suppress loss in light load mode
- Overvoltage protection function that detecting the Vcc voltage
- A drive circuit for connecting a power MOSFET directly
- Output peak current: So urce current 500mA, sink current +1A
- Pulse by pulse overcurrent restriction function
- Overload protection function (latch or non latch mode selectable)
- Output ON OFF function by external signal
- Latch mode overvoltage shutdown function
- Underv oltage lockout function (16.5V ON/9V OFF)
- Reference voltage output (5V)
- Maximum duty cycle 70%
- Package: SOP-8
Applications
- Switching Power Supplies
Specifications
| Controller type | PWM |
|---|---|
| Applied circuit Detail | Flyback |
| Frequency (kHz) | Adjustable |
| VCC(V) | 10 to 28 |
| Built-in start up circuit (V) | Without |
| Over load protection | Timer-latch |
| Over voltage protection | Latch (VCC) |
| Package | SOP-8 |
Documentation Tools
| Datasheet | FA3647N |
|---|---|
| Design tools | Fly-back transformer design |
| Selection Guide | Power Supply Control IC Selection Guide |
