UCD7138 Series
Single-channel synchronous rectifier driver with body-diode conduction sensing
Manufacturer: Texas Instruments
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Key Features
• Low-Side Gate Driver With Body-DiodeConduction SensingGate Turnoff Edge Body-Diode ConductionReportingGate Turnon Edge Delay OptimizationWorks Together With the Dead-TimeCompensation (DTC) Module in the UCD3138AFamily of Digital Power Controllers:Automatic or Manual Dead-Time Adjustment ofGate Turnon and Turnoff EdgesNegative Current Protection–150-mV Body-Diode Conduction SensingThresholdAble to Sense Body Diode Conduction Times asLow as 10 ns4-A Peak-Source and 6-A Peak-Sink DriveCurrentFast Propagation Delays (14-ns Typical)Fast Rise and Fall Times (5-ns Typical)Up to 2-MHz Operating Frequency4.5-V to 18-V Supply RangeRail-to-Rail Drive CapabilityVCCUndervoltage Lockout (UVLO)6-Pin 3-mm × 3-mm WSON-6 PackageLow-Side Gate Driver With Body-DiodeConduction SensingGate Turnoff Edge Body-Diode ConductionReportingGate Turnon Edge Delay OptimizationWorks Together With the Dead-TimeCompensation (DTC) Module in the UCD3138AFamily of Digital Power Controllers:Automatic or Manual Dead-Time Adjustment ofGate Turnon and Turnoff EdgesNegative Current Protection–150-mV Body-Diode Conduction SensingThresholdAble to Sense Body Diode Conduction Times asLow as 10 ns4-A Peak-Source and 6-A Peak-Sink DriveCurrentFast Propagation Delays (14-ns Typical)Fast Rise and Fall Times (5-ns Typical)Up to 2-MHz Operating Frequency4.5-V to 18-V Supply RangeRail-to-Rail Drive CapabilityVCCUndervoltage Lockout (UVLO)6-Pin 3-mm × 3-mm WSON-6 Package
Description
AI
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.
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.