6174v-8004A (HR8163) Flyback transformers
The TEA1753T is the third generation of green Switched Mode Power Supply (SMPS) controller ICs. The TEA1753T combines a controller for Power Factor Correction (PFC) and a Flyback controller. Its high level of integration allows the design of a cost-effective power supply with a very low number of external components.
The special built-in green functions provide high efficiency at all power levels. This efficiency applies to quasi-resonant operation at high-power levels, quasi-resonant operation with valley skipping, as well as reduced frequency operation at lower power levels. At low-power levels, the PFC switches off to maintain high efficiency.
During low-power conditions, the Flyback controller switches to frequency reduction mode and limits the peak current to an adjustable minimum value. This mode ensures high efficiency at low-power and good standby power performance while minimizing audible noise from the transformer.
The controller is switched to the power-down mode for no-load operation. In this mode, the controller is shut down for very low standby power applications.
The TEA1753T is a Multi-Chip Module, (MCM), containing two chips. The proprietary high-voltage BCD800 process which makes direct start-up possible from the rectified universal mains voltage in an effective and green way. The second low voltage Silicon On Insulator (SOI) is used for accurate, high-speed protection functions and control.
The TEA1753T enables the design of highly efficient and reliable supplies with power requirements of up to 250 W using the minimum number of external components.
Remark: All values provided throughout this data sheet are typical values unless otherwise stated.
Features and benefits
■ Integrated PFC and Flyback controller
■ Universal mains supply operation (70 V (AC) to 276 V (AC))
■ Dual-boost PFC with accurate maximum output voltage (NXP patented)
■ High level of integration, resulting in a very low external component count and a cost-effective design
■ Adjustable PFC switch off delay
■ On-chip start-up current source
■ Power down functionality for very low standby power
PFC green features
■ Valley/Zero Voltage Switching (ZVS) for minimum switching losses (NXP patented)
■ Frequency limitation to reduce switching losses
■ PFC is switched off when a low load is detected at the Flyback output
Flyback green features
■ Valley switching for minimum switching losses (NXP patented)
■ Frequency reduction with adjustable minimum peak current at low-power operation to
maintain high efficiency at low output power levels
■ Safe restart mode for system fault conditions
■ Continuous mode protection with demagnetization detection for both converters (NXP patented)
■ UnderVoltage Protection (UVP) (foldback during overload)
■ Accurate OverVoltage Protection (OVP) for both converters (adjustable for Flyback converter)
■ Mains voltage independent OverPower Protection (OPP)
■ Open control loop protection for both converters. The open-loop protection on the Flyback converter is safe restart
■ OverTemperature Protection (OTP)
■ Low and adjustable OverCurrent Protection (OCP) trip level for both converters
■ General-purpose latched protection input for system OverTemperature Protection (OTP) for example
■ The device is used in all applications requiring an efficient and cost-effective power
supply solutions up to 250 W. Notebook adapters in particular benefit from the high
level of integration
Multi-purpose and Feature-Rich PCI Express Bridge
The bridge offers PCI Express™ (PCIe) bridging capability from a Generic Local Busto PCIe enabling userstoadd scalable high bandwidth interconnectiontoa wide variety of applications including communication line cards, surveillance systems,video capture cards, industrial control,office
automation, IP Media Servers,RAID systems and medical imaging. Many embedded system designs utilizing PCI today can easily migrate to PCIe. The ExpressLane™ PEX 8311 bridge can be used in Root Complex mode with the device directly interfacing multiple local bus devices including processors and FPGAs to a downstream PCIe port. The bridge can also function in an EndPoint
type application connecting multiple local bus components to an upstream PCIe port.
oPCI Express to Generic Local Bus Bridge
oRoot Complex and EndPoint Modes of Operation
oLocal Bus modes:
-32-bit address & 32-bit data C Mode
-Multiplexed 32-bit address/data J Mode
oLocal Bus Clock rates to 66MHz
oZero wait state bursts to 264 MB/sec
o1 Lane PCI Express Port
o2 DMA Channels
o21mmx21mm, 337 pin PBGA package
o3.3V I/O and 5V tolerant Local Bus
oPower: 1.0 Watt
The µPD720122 is USB2.0 Generic Device Controller, which combines the NEC Electronics USB2.0 PHY and End point Controller. The Controller has certified by USB Implementers Forum. End-point Controller has banked two Bulk End point and one Interrupt End-point, and selectable three general CPU bus-types, suitable for designing various USB device. The controller has the external local bus, that enables to perform high speed data transferring when CPU is accessing to the controller. These IP Blocks in the controller are based completely on an NEC Electronics ASIC core, so µPD720122 is suitable to design for the prototype system that are intended to design ASIC in the future.
• Complaint with USB2.0 specification (Maximum data transferring rate: 480 Mbps)
• USB2.0 certified (TestID=40000822)
• High(480Mbps) / Full(12Mbps)- Speed support and switch automatically
• Easy to design NEC Electronics ASIC
• Generic USB2.0 Device Controller
• Two Bulk End-points and One Interrupt End-point
• Performed Data Local Bus independent from CPU bus.
(Maximum Data Transferring rate: 21 MBps with DMA mode )
• Selectable three CPU Bus Interface
The TTL-232RG Generic cables are a family of USB to TTL serial UART converter cables incorporating FTDI’s FT232RQ USB to Serial UART interface IC device which handles all the USB signalling and protocols. The cables provide a fast, simple way to connect devices with a logic level serial interface to USB.
• TTL-232RG Generic converter cable provides a
USB to TTL Serial interface with various logic
• On board FT232RQ provides single chip USB to
asynchronous serial data transfer interface.
• Entire USB protocol handled by the electronics
in the cable USB.
• Connect directly to a microcontroller UART or
• UART interface support for 7 or 8 data bits, 1
or 2 stop bits and odd / even / mark / space /
• Fully assisted hardware (RTS#/CTS#) or X-On
/ X-Off software handshaking.
• Data transfer rates from 300 baud to 3 Mbaud
at TTL levels.
• Internal EEPROM with user writeable area.
• Wide range of output drive voltages 1.8V to
5.0V safe TTL inputs makes the TTL-232RG
easy to interface to 5.0V MCU’s.
• FTDI’s royalty-free VCP allow for
communication as a standard emulated COM
port and D2XX ‘direct’ drivers provide DLL
application programming interface.
• Support for FT232R FTDIChip-ID™ feature for
• Voltage output power allows external logic to
be powered from the USB port.
• Cable can be used to accept IO voltage from
application interface logic allowing users to
supply IO voltage levels.
• 6 way outputs provide Tx, Rx, RTS#, CTS#,
VCC and GND.
• Low USB bandwidth consumption.
• UHCI / OHCI / EHCI host controller compatible.
• USB 2.0 (12Mb/s) Full Speed compatible.
• -40°C to +85°C operating temperature range.
• Cable length is 1.80m (6 feet).
• FCC and CE compliant.
• Custom versions also available (subject to
• USB to Serial TTL Level Converter
• Upgrading Legacy Peripherals to USB
• Interface Microcontroller UART or I/O to USB
• Interface FPGA / PLD to USB
• Interface to FTDI VDRIVE2 or VMUSIC2
• Interface USB to none-standard (application
dependant) logic levels.
• Replace MAX232 type level shifters allowing for
direct connection of products to PC via USB
• USB Instrumentation PC interface
• USB Industrial Control
• USB Software / Hardware Encryption Dongles
Flyback operation will be illustrated with reference to the basic circuit and the waveforms of fig. 1. It is a two step process. During the ON-time of the switch, energy is taken from the input and stored in the primary winding of the Flyback transformer (actually, two coupled inductors). At the secondary side, the catch diode is reverse biased, thus the load is being supplied by the energy stored in the output bulk capacitor.
The LT ®1425 is a monolithic high power switching regulator specifically designed for the isolated Flyback topology. No “third winding” or optoisolator is required; the integrated circuit senses the isolated output voltage directly from the primary side Flyback waveform. A high current, high efficiency switch is included on the die along with all oscillator, control and protection circuitry.
■ No transformer “Third Winding” or Optoisolator Required
■ ±5% Accurate Output Voltage Without User Trims (See Circuit Below)
■ Resistor Programmable Output Voltage
■ Regulation Maintained Well Into Discontinuous Mode (Light Load)
■ Optional Load Compensation
■ Operating Frequency: 285kHz
■ Easily Synchronized to External Clock
■ Available in 16-Pin Narrow SO Package
■ Isolated Flyback Switching Regulators
■ Ethernet Isolated 5V to –9V Converters
■ Medical Instruments
■ Isolated Telecom Supplies
The LT®1737 is a monolithic switching regulator controller specifically designed for the isolated Flyback topology. It drives the gate of an external MOSFET and is generally powered from a DC supply voltage. Output voltage feedback information may be supplied by a variety of methods including a third transformer winding, the primary winding or even direct DC feedback (see Applications Information). Its gate drive capability, coupled with a suitable external MOSFET and other power path components, can deliver load power up to tens of Watts.
■ Drives External Power MOSFET
■ Supply Voltage Range: 4.5V to 20V
■ Flyback Voltage Limited Only by External Components
■ Senses Output Voltage Directly from Primary Side Winding—No Optoisolator Required
■ Switching Frequency from 50kHz to 250kHz with External Capacitor
■ Moderate Accuracy Regulation Without User Trims
■ Regulation Maintained Well into Discontinuous Mode
■ External ISENSE Resistor
■ Optional Load Compensation
■ Optional Undervoltage Lockout
■ Shutdown Feature Reduces IQ to 50µA Typ
■ Available in 16-Pin GN and SO Packages
■ Isolated Flyback Switching Regulators
■ Medical Instruments
■ Instrumentation Power Supplies
The LT®3575 is a monolithic switching regulator specifically designed for the isolated Flyback topology. No third winding or optoisolator is required for regulation. The part senses the isolated output voltage directly from the primary side Flyback waveform. A 2.5A, 60V NPN power switch is integrated along with all control logic into a 16-lead TSSOP package.
The LT3575 operates with input supply voltages from 3V to 40V, and can deliver output power up to 14W with no external power switch.The LT3575 utilizes boundary mode operation to provide a small magnetic solution with improved load regulation.
The output voltage is easily set with two external resistors and the transformer turns ratio. Off the shelf transformers are available for many applications.
■ 3V to 40V Input Voltage Range
■ 2.5A, 60V Integrated NPN Power Switch
■ Boundary Mode Operation
■ No transformer Third Winding or Optoisolator Required for Regulation
■ Improved Primary-Side Winding Feedback Load Regulation
■ VOUT Set with Two External Resistors
■ BIAS Pin for Internal Bias Supply and Power NPN Driver
■ Programmable Soft-Start
■ Programmable Power Switch Current Limit
■ Thermally Enhanced 16-Lead TSSOP
■ Industrial, Automotive and Medical Isolated Power Supplies
The STV9325 is a vertical deflection booster designed for TV and monitor applications. This device, supplied with up to 35 V, provides up to 2.5 App output current to drive the vertical deflection yoke. The internal Flyback generator delivers Flyback voltages up to 75 V. In double-supply applications, a stand-by state will be reached by stopping the (+) supply alone.
■Output Current up to 2.5 App