UCC28230, the UCC28231 PWM bus controller optimizes a high-efficiency, high-power-density, unregulated intermediate bus converter. Topologies include push-pull, half-bridge, and full-bridge. External drivers, so asthe UCC27200 120-V high-side/low-side drivers, can use the controller.
Low-cost, small-size, and high-efficiency solutions are provided by innovations such as:
- Activation frequency control circuitry allows small output inductance changes and capacities to start large intermediate bus capacitors.
- Load dependent shutdown time control is set by the user.
Other 1-D control outputs can be used for main winding self-driving synchronous rectification outputs, applied clamping, or as a control drive synchronous rectification drive signal.
characteristic
- Programmable, relying on off-time control of loads
- Variable frequency speed regulation starts allow for start-up with large output capacitance with small output inductance, low ripple, constant current
- Two 0.2 push-pull outputs provide a three-dimensional external drive with a coordinating control signal
- Two self-driven synchronous rectifiers with additional 1-D outputs for optimal use of drive or control
- Unregulated, fixed volts, or fixed frequency is set by the user
- Two, the overall accuracy is 1.5% reference voltage options: 5 in, UCC28230 and 3.3-V UCC28231
- The resistor can be programmable for switching frequencies up to 1 MHz
- Allow cycle-by-cycle current limits to be shared with drooping current-type parallel operation
- Single external capacitor bank soft overcurrent hiccup mode parameters start and restart
- Severe short-circuit hiccups with a choice of protective external resistors for reboot or latching
- Input and output undervoltage lockout
- Thermal shutdown
- Thermally enhanced 3 mm× 2 mm SON-12 and TSSOP-14 package options
-
apply
- Intermediate bus isolated converters
- DC – DC transformers
parameter
| |
|
UCC28231 |
| topology |
|
Push and pull, half bridge, full bridge |
| Control method |
|
Voltage mode |
| Duty Cycle (Max) (%) |
|
100 |
| Frequency (max) (kHz) |
|
1000 |
| On/off of undervoltage lockout threshold (5) |
|
6.3/5.7 |
| Pin/Pack |
|
12USON，14TSSOP |
| (#) Regulated output |
|
One |
| Operating Temperature Range (°C) |
|
-55 to 125 |