Description
BUY UCC2893DW https://www.utsource.net/itm/p/12609015.html
| Parameter |
Symbol |
Min |
Typ |
Max |
Unit |
Description |
| Input Voltage Range |
VCC |
8.5 |
- |
76 |
V |
Operating input voltage range |
| Start Supply Current |
ISS |
- |
120 |
140 |
μA |
Initial supply current |
| Operating Supply Current |
ICC |
- |
3.5 |
4.5 |
mA |
Operating supply current |
| Minimum On-Time |
tON(min) |
300 |
- |
- |
ns |
Minimum on-time for the switch |
| Maximum Off-Time |
tOFF(max) |
- |
6.9 |
- |
μs |
Maximum off-time for the switch |
| Frequency |
fSW |
- |
65 |
100 |
kHz |
Switching frequency |
| Duty Cycle Limit |
DCL |
- |
0.5 |
- |
|
Duty cycle limit |
| Overcurrent Protection |
OCP |
- |
- |
- |
A |
Threshold for overcurrent protection (dependent on external components) |
| Thermal Shutdown Temperature |
TSD |
- |
160 |
- |
°C |
Temperature at which thermal shutdown is initiated |
Instructions for UCC2893DW:
Power Supply Connection:
- Connect the VCC pin to a power source within the specified input voltage range (8.5V to 76V).
External Components Setup:
- Choose external components such as resistors and capacitors to set the switching frequency and duty cycle according to the application requirements.
- Ensure that the inductor and diode used in the flyback configuration are rated for the expected current and voltage levels.
Overcurrent Protection:
- Implement an overcurrent protection circuit using a sense resistor connected between the CS pin and ground. Adjust the resistor value based on the desired overcurrent threshold.
Thermal Management:
- Monitor the temperature of the device to prevent it from exceeding the thermal shutdown temperature (160°C). Use heatsinks or spread out heat generation if necessary.
Start-Up Sequence:
- The controller will start operating once the VCC voltage reaches the minimum operating level. Ensure a stable power-up sequence to avoid erratic behavior during startup.
Testing and Validation:
- After assembling the circuit, perform testing under various load conditions to ensure stability and performance meet the design specifications.
- Validate the operation by measuring the output voltage and current, ensuring they remain within acceptable limits.
Safety Precautions:
- Always handle the device with care to avoid damage from electrostatic discharge (ESD).
- Follow proper grounding and isolation practices when working with high-voltage circuits.
(For reference only)
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