UCC24624DR
ActiveHIGH-FREQUENCY, DUAL SYNCHRONOUS RECTIFIER CONTROLLER FOR LLC CONVERTERS
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UCC24624DR
ActiveHIGH-FREQUENCY, DUAL SYNCHRONOUS RECTIFIER CONTROLLER FOR LLC CONVERTERS
Technical Specifications
Parameters and characteristics for this part
| Specification | UCC24624DR |
|---|---|
| Channel Type | Independent |
| Current - Peak Output (Source, Sink) | 1.5 A, 4 A |
| Driven Configuration | Low-Side |
| Gate Type | N-Channel MOSFET |
| Input Type | Non-Inverting |
| Mounting Type | Surface Mount |
| Number of Drivers | 2 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 8-SOIC |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| Rise / Fall Time (Typ) [custom] | 23 ns |
| Rise / Fall Time (Typ) [custom] | 19 ns |
| Supplier Device Package | 8-SOIC |
| Voltage - Supply [Max] | 26 V |
| Voltage - Supply [Min] | 4.25 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Arrow | N/A | 2500 | $ 0.90 | |
| 5000 | $ 0.88 | |||
| 7500 | $ 0.87 | |||
| 10000 | $ 0.86 | |||
| Digikey | Cut Tape (CT) | 1 | $ 3.00 | |
| 10 | $ 1.95 | |||
| 25 | $ 1.67 | |||
| 100 | $ 1.36 | |||
| 250 | $ 1.21 | |||
| 500 | $ 1.12 | |||
| 1000 | $ 1.04 | |||
| Digi-Reel® | 1 | $ 3.00 | ||
| 10 | $ 1.95 | |||
| 25 | $ 1.67 | |||
| 100 | $ 1.36 | |||
| 250 | $ 1.21 | |||
| 500 | $ 1.12 | |||
| 1000 | $ 1.04 | |||
| Tape & Reel (TR) | 2500 | $ 0.96 | ||
| 5000 | $ 0.91 | |||
| 7500 | $ 0.89 | |||
| Texas Instruments | LARGE T&R | 1 | $ 1.55 | |
| 100 | $ 1.28 | |||
| 250 | $ 0.92 | |||
| 1000 | $ 0.69 | |||
Description
General part information
UCC24624 Series
The UCC24624 high-performance synchronous rectifier (SR) controller is dedicated forLLC resonant convertersto replace the lossy diode output rectifiers with SR MOSFETs and improve the overall system efficiency.
The UCC24624 SR controller uses drain-to-source voltage sensing method to achieve on and off control of the SR MOSFET. Proportional gate drive is implemented to extend the SR conduction time, minimize the body diode conduction time. To compensate for the offset voltage caused by the SR MOSFET parasitic inductance, the UCC24624 implements an adjustable positive turn-off threshold to accommodate different SR MOSFET packages. UCC24624 has a built-in 475-ns on-time blanking and a fixed 650-ns off-time blanking to avoid SR false turn-on and turn-off. UCC24624 also integrates a two-channel interlock function that prevents the two SRs from being on at the same time. With 230-V voltage-sensing pins and 28-V ABS maximum VDD rating, it can be directly used in converters with output voltage up to 24.75 V. The internal clamp allows the controller to support 36-V output voltage easily by adding an external current limiting resistor on VDD.
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Documents
Technical documentation and resources