0
ACTIVE
Rating |
Catalog |
Topology |
Buck, Flyback |
Iout (max) (A) |
0.7 |
Vin (max) (V) |
450 |
Vin (min) (V) |
10 |
Vout (max) (V) |
18 |
Vout (min) (V) |
3.3 |
Features |
Adjustable switching frequency, Current limiting, Green mode, High voltage startup, High-voltage startup, Input line monitor, Integrated Switch, IoT compatible, Leading edge blanking, Light load efficiency, Light-load efficiency, Overcurrent protection, Overtemperature protection, Soft start, Thermal shutdown |
Control mode |
Current, Primary-side regulation, Voltage |
Switching frequency (min) (kHz) |
0.42 |
Switching frequency (max) (kHz) |
115 |
Operating temperature range (°C) |
-40 to 125 |
Iq (typ) (µA) |
23500 |
Duty cycle (max) (%) |
99 |
SOIC (D)-7-29.4 mm² 4.9 x 6
The UCC28910 and UCC28911 are high-voltage flyback switchers that provide output voltageand current regulation without the use of an optical coupler. Both devices incorporate a 700-Vpower FET and a controller that process operating information from the flyback auxiliary windingand power FET to provide a precise output voltage and current control. The integrated high-voltage current source for startup that is switched off during device operation, and the controller current consumption is dynamically adjusted with load. Both enablethe very low stand-by power consumption.
Control algorithms in the UCC28910 and UCC28911, combining switching frequency and peakprimary current modulation, allow operating efficiencies to meet or exceed applicable standards.Discontinuous conduction mode (DCM) with valley switching is used to reduce switching losses.Built-in protection features help to keep secondary and primary component stress levels in check across the operating range. The frequency jitter helps to reduce EMI filter
WELL LINK CHIPS GROUP CO.,LIMITED FLAT/RM 1802 BEVERLY HOUSE 93-107 LOCKHART ROAD WANCHAI HK
