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UCD3138A

更新时间： 2024-11-05 01:01:15
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德州仪器 - TI /
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83页 2733K
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Highly Integrated Digital Controller for Isolated Power

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UCD3138A 数据手册

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UCD3138A  
SLUSC66B –MARCH 2015–REVISED MAY 2015  
UCD3138A Highly Integrated Digital Controller for Isolated Power  
1 Device Overview  
1.1 Features  
1
• Digital Control of up to 3 Independent Feedback  
Loops  
• High Efficiency and Light Load Management  
– Burst Mode  
– Dedicated PID-Based Hardware  
– 2-Pole/2-Zero Configurable  
– Nonlinear Control  
– Ideal Diode Emulation  
– Synchronous Rectifier Soft On/Off  
– Low IC Standby Power  
• Soft Start / Stop with and without Prebias  
• Fast Input Voltage Feed Forward Hardware  
• Synchronous Rectifier Dead Time Optimization  
Peripheral to Use with UCD7138 Synchronous  
Rectifier Driver  
• Primary Side Voltage Sensing  
• Copper Trace Current Sensing  
• Flux and Phase Current Balancing  
• Current Share Bus Support  
– Average or Master and Slave  
• Feature Rich Fault Protection Options  
– 7 High-Speed Analog Comparators  
– Cycle-by-Cycle Current Limiting  
– Programmable Fault  
• Up to 16 MHz Error Analog-to-Digital Converter  
(EADC)  
– Configurable Resolution as Small as 1 mV/LSB  
– Automatic Resolution Selection  
– Up to 8x Oversampling  
– Hardware-Based Averaging (up to 8x)  
– 10-Bit Effective DAC With 4 Bits of Dither  
– Adaptive Sample Trigger Positioning  
– External Fault Capability  
– 10 Digital Comparators  
– Programmable Blanking Time  
• Synchronization of DPWM Waveforms Between  
Multiple UCD3138A devices  
• 14-Channel, 12-Bit, 267-ksps General-Purpose  
ADC  
– Programmable Averaging Filters  
– Dual Sample and Hold  
• Internal Temperature Sensor  
• Up to 8 High Resolution Digital Pulse Width  
Modulated (DPWM) Outputs  
– 250-ps Pulse Width Resolution  
– 4-ns Frequency and Phase Resolution  
– Adjustable Phase Shift Between Outputs  
– Adjustable Dead-band Between Pairs  
– Cycle-by-Cycle Duty Cycle Matching  
– Up to 2-MHz Switching Frequency  
• Configurable PWM Edge Movement  
– Trailing Modulation  
– Leading Modulation  
– Triangular Modulation  
• Configurable Feedback Control  
– Voltage Mode  
• Fully Programmable High-Performance 31.25  
MHz, 32-Bit ARM7TDMI-S™ Processor  
– 32KB of Program Flash  
– 2KB of Data Flash with ECC  
– 4KB of Data RAM  
– Firmware Boot-Load in the Field via I2C or  
UART  
• Communication Peripherals  
– I2C/PMBus  
– Average Current Mode  
– Peak Current Mode Control  
– Constant Current  
– Constant Power  
– 2 UARTs on UCD3138ARGC (64-Pin QFN)  
– 1 UART on UCD3138ARMH (40-Pin QFN)  
• UART Auto-baud Rate Adjustment  
• Timer Capture with Selectable Input Pins  
• Up to 5 Additional General Purpose Timers  
• Built In Watchdog: BOD and POR  
• 64-Pin QFN and 40-Pin QFN Packages  
• 40-Pin QFN ICP9592A T/C Qualification  
• Operating Temperature: –40°C to 125°C  
• Debug Interface  
• Configurable Modulation Methods  
– Frequency Modulation  
– Phase Shift Modulation  
– Pulse Width Modulation  
• Fast, Automatic, and Smooth Mode Switching  
– Frequency Modulation and PWM  
– Phase Shift Modulation and PWM  
– Frequency Modulation and Phase Shift  
– Code Composer Studio™ with JTAG Interface  
– Fusion Digital Power™ Designer GUI Support  
Modulation  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 
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