OB2278 Description
OB2278 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications. PWM switching frequency at normal operation is externally programmable and trimmed to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss.
OB2278 Key Features
- Audio Noise Free Operation
- External Programmable PWM Switching Frequency
- Internal Synchronized Slope pensation
- Low VIN/VDD Startup Current(3uA) and Low Operating Current (2.3mA)
- Leading Edge Blanking on Current Sense Input
- plete Protection Coverage with selective protections for Latch Shutdown o VDD Over Voltage Protection(OVP)
- Latch Shutdown o Over Temperature Protection(OTP)
- Latch Shutdown o Over Load Protection. (OLP)
- Auto recovery or Latch Shutdown o VDD Under Voltage Lockout with Hysteresis (UVLO) o Gate Output Voltage Clamp (16.5V) o