UCC28221PW
LTBAUTOMOTIVE DUAL INTERLEAVED 2MHZ PWM CONTROLLER WITH PROGRAMMABLE MAX DUTY CYCLE 13V/8V UVLO
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UCC28221PW
LTBAUTOMOTIVE DUAL INTERLEAVED 2MHZ PWM CONTROLLER WITH PROGRAMMABLE MAX DUTY CYCLE 13V/8V UVLO
Technical Specifications
Parameters and characteristics for this part
| Specification | UCC28221PW |
|---|---|
| Control Features | Soft Start |
| Duty Cycle | 75 % |
| Fault Protection | Over Voltage, Current Limiting |
| Frequency - Switching | 2 MHz |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 150 °C |
| Operating Temperature [Min] | -55 °C |
| Output Isolation | Isolated |
| Package / Case | 20-TSSOP |
| Package / Case [x] | 0.173 in |
| Package / Case [y] | 4.4 mm |
| Supplier Device Package | 20-TSSOP |
| Topology | Flyback |
| Voltage - Supply (Vcc/Vdd) [Max] | 14.5 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 8.4 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 210 | $ 4.59 | |
| Texas Instruments | TUBE | 1 | $ 5.14 | |
| 100 | $ 4.19 | |||
| 250 | $ 3.29 | |||
| 1000 | $ 2.79 | |||
Description
General part information
UCC28221 Series
The UCC28220 and UCC28221 are a family of BiCMOS interleaved dual channel PWM controllers. Peak current mode control is used to ensure current sharing between the two channels. A precise maximum duty cycle clamp can be set to any value between 60% and 90% duty cycle per channel.
The UCC28220 has an UVLO turnon threshold of10 V for use in 12-V supplies while UCC28221 has a turnon threshold of 13 V for systems needing wider UVLO hysteresis. Both have 8-V turnoff thresholds.
Additional features include a programmable internal slope compensation with a special circuit which is used to ensure exactly the same slope is added to each channel and a high-voltage 110-V internal JFET for easier start-up for the wider hysteresis UCC28221 version.
Documents
Technical documentation and resources