Green mode PWM-ICs
FA8A39N
-
Status:Available
FA8A39N is a current-mode switching power supply control IC that can directly drive power MOSFETs. Despite its compact 8-pin package, it has a wide variety of functions, making it ideal for saving power at light loads and reducing the number of external components, thereby enabling the configuration of space-saving and cost-effective power supplies.
Features
- Low standby power
- Incorporates an X-capacitor discharge function. (Reduces loss due to discharge resistance)
- Achieves low current consumption. (450 uA typ. during normal operation.)
- Incorporates a frequency reduction function to improve efficiency in the mid-load range.
- Switches to burst operation at light loads to achieve low standby power consumption.
- Incorporates a start-up circuit with a 500 V withstand voltage. (Achieves power savings for the startup circuit)
- Various protective functions
- 2-step detection overload protection (Delay time 2.5 sec typ.). Can handle excessive loads such as those of motors.
- Incorporates an overload detection value correction function based on the AC input voltage.
- Incorporates secondary-side load short-circuit protection (Delay time 64 msec typ.).
- Incorporates a latch stop function using LAT pin pull-up/pull-down.Protective operation is available depending on the application.
- Incorporates overvoltage protection. (Vthovp = 30 V typ.)
- Incorporates low voltage malfunction prevention. (Vccoff = 6.5 V typ.)
- Incorporates brown-in/out function (AC input voltage protective function)
- Incorporates a soft start function. (11 msec typ.)
- Incorporates minimum on-width function. Suppresses excessive MOSFET drain voltage jumps during power-on and restart.
- Achieves low EMI using a frequency spread function.
- Incorporates a drive circuit capable of directly driving power MOSFETs. Output current: 0.5 A (sink)/0.5 A (source)
Applications
- Switching Power Supplies
Specifications
| Controller type | PWM |
|---|---|
| Applied circuit | Flyback |
| Frequency (kHz) | 65 |
| VCC(V) | 10 to 28 |
| Built-in start up circuit (V) | 500 |
| Over load protection | Timer-latch |
| Over voltage protection | Latch (VCC) |
| Package | SOP-8 |
Documentation Tools
| Reference Design | Power Supply Control IC Reference Design |
|---|---|
| Design tools | Fly-back transformer design |
| Selection Guide | Power Supply Control IC Selection Guide |
