UCD7138DRSR
ActiveSINGLE-CHANNEL SYNCHRONOUS RECTIFIER DRIVER WITH BODY-DIODE CONDUCTION SENSING
UCD7138DRSR
ActiveSINGLE-CHANNEL SYNCHRONOUS RECTIFIER DRIVER WITH BODY-DIODE CONDUCTION SENSING
Description
General part information
UCD7138 Series
The UCD7138 device is a 4-A and 6-A single-channel MOSFET driver with body-diode conduction sensing and reporting and is a high performance driver that allows the Texas Instruments UCD3138A digital PWM controller to achieve advanced synchronous-rectification (SR) control. The device contains a high-speed gate driver, a body-diode conduction-sensing circuit, and a turnon delay optimization circuit. The device is suitable for high-power, high-efficiency isolated converter applications where SR dead-time optimization is desired.
The UCD7138 device offers asymmetrical rail-to-rail 4-A source and 6-A sink peak-current drive capability. The short propagation delay and fast rise and fall time allows efficient operation at high frequencies. An internal high-speed comparator with a –150-mV threshold detects the body-diode conduction and reports the information to the UCD3138A digital-power controller. The UCD7138 device is capable of sensing body-diode conduction time as low as 10 ns. The SR turnon edge is optimized by the UCD7138 device. The SR turnoff edge is optimized by the UCD3138A digital-power controller which analyzes the body-diode conduction information reported by the UCD7138 DTC pin.
The benefits of the chipset include maximizing system efficiency by minimizing body-diode conduction time, robust and fast negative-current protection, and a simple interface.
Technical Specifications
Parameters and characteristics for this part
| Specification | UCD7138DRSR |
|---|---|
| Channel Type | Single |
| Current - Peak Output (Sink) | 6 A |
| Current - Peak Output (Source) | 4 A |
| Driven Configuration | Low-Side |
| Fall Time (Typ) | 3.5 ns |
| Gate Channel | N-Channel |
| Gate Type | MOSFET |
| Input Type | Inverting |
| Logic Voltage - VIH | 1.93 V |
| Logic Voltage - VIL | 1.08 V |
| Mounting Type | Surface Mount |
| Number of Drivers | 1 |
| Operating Temperature (Max) | 125 °C |
| Operating Temperature (Min) | -40 °C |
| Package / Case | 6-WDFN Exposed Pad |
| Package Length | 3 mm |
| Package Name | 6-SON |
| Package Width | 3 mm |
| Rise Time (Typ) | 4 ns |
| Voltage - Supply (Maximum) | 18 V |
| Voltage - Supply (Minimum) | 4.5 V |
Pricing
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