UCD3138064RMHT datasheet(2/91 Pages) TI1

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UCD3138064

SLUSB72B – MARCH 2013 – REVISED SEPTEMBER 2014

www.ti.com

1.3

Description

The UCD3138064 is a digital power supply controller from Texas Instruments offering superior levels of

integration and performance in a single chip solution. The UCD3138064, in comparison to Texas

Instruments UCD3138 digital power controller (Section 3), offers 64 kB of program Flash memory (vs 32

kB in UCD3138) and additional options for communication such as SPI and a second I2C port. The

availability of 64 kB of program Flash memory in 2-32 kB banks, enables the designers to implement dual

images of firmware (e.g. one main image + one back-up image) in the device and the flexibility to execute

from either of the banks using appropriate algorithms. It also creates the unique opportunity for the

processor to load a new program and subsequently execute that program without interrupting power

delivery. This feature allows the end user to add new features to the power supply in the field while

eliminating any down-time required to load the new program.

The flexible nature of the UCD3138064 makes it suitable for a wide variety of power conversion

applications. In addition, multiple peripherals inside the device have been specifically optimized to

enhance the performance of AC/DC and isolated DC/DC applications and reduce the solution component

count in the IT and network infrastructure space. The UCD3138064 is a fully programmable solution

offering customers complete control of their application, along with ample ability to differentiate their

solution. At the same time, TI is committed to simplifying our customer’s development effort through

offering best in class development tools, including application firmware, Code Composer StudioTM

software development environment, and TI’s Fusion Power Development GUI which enables customers to

configure and monitor key system parameters.

At the core of the UCD3138064 controller are the Digital Power Peripherals (DPP). Each DPP implements

a high speed digital control loop consisting of a dedicated Error Analog to Digital Converter (EADC), a PID

based 2 pole - 2 zero digital compensator and DPWM outputs with 250ps pulse width resolution. The

device also contains a 12-bit, 267 ksps general purpose ADC with up to 14 channels, timers, interrupt

control, PMBus, I2C, SPI and UART communications ports. The device is based on a 32-bit ARM7TDMI-S

RISC

microcontroller

that

performs

real-time

monitoring,

configures

peripherals

and

manages

communications. The ARM microcontroller executes its program out of programmable flash memory as

well as on chip RAM and ROM.

In addition to the DPP, specific power management peripherals have been added to enable high efficiency

across the entire operating range, high integration for increased power density, reliability, and lowest

overall system cost and high flexibility with support for the widest number of control schemes and

topologies. Such peripherals include: light load burst mode, synchronous rectification, LLC and phase

shifted full bridge mode switching, input voltage feed forward, copper trace current sense, ideal diode

emulation, constant current constant power control, synchronous rectification soft on and off, peak current

mode control, flux balancing, secondary side input voltage sensing, high resolution current sharing,

hardware configurable soft start with pre bias, as well as several other features. Topology support has

been optimized for voltage mode and peak current mode controlled phase shifted full bridge, single and

dual phase PFC, bridgeless PFC, hard switched full bridge and half bridge, and LLC half bridge and full

bridge.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

VQFN (64)

9.00 mm × 9.00 mm

UCD3138064

VQFN (48)

7.00 mm × 7.00 mm

VQFN (40)

6.00 mm × 6.00 mm

(1)

For all available packages, see the orderable addendum at the end of the datasheet.

Device Overview

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