参考设计
(20)
Isolated LED Driver with PFC for A19 Lamp Application using LM3447 - 230VAC, 36VLED 12W
PMP8013: The main purpose of this reference design is to demonstrate the LM3447 is ideal for implementing high dimmable performance with single stage PFC, isolated LED lamp drivers where simplicity, low-component count and small solution size. The operating conditions and performance of the reference design are as follows: ●190VAC to 264VAC, 50Hz Input Voltage ●32V to 38V LED Voltage ●280mA Regulated LED Current ●> 81% Typical System Efficiency ●High Power Factor > 0.9 ●Output Short-Circuit and Open-Circuit Protection
36V-75VDC Input, 12V/10A Active Clamp Forward, 1/8th Brick Form Factor
PMP7451: This reference design generates a 12V/10A output from a standard 48V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD18531Q5A, implemented as self-driven synchronous rectifiers, provide for a highly efficient design. This design is laid out in a standard 1/8th brick footprint and includes enable, remote sense, and output overvoltage features.
20W Industrial Power Supply
PMP10559: PMP10559 is a non-sync isolated Flybuck-boost converter with a negative primary voltage. The power supply has a synchronous buck regulator, LM5160, and a versa pack transformer. The design accepts an input voltage of 18V to 30V, and outputs 30V, capable of providing 0.67A of current to the load, making it suitable for 24V input industrial application. The Fly-Buck topology can regulate the secondary side outputs without opto-coupler or aux winding, and is capable of achieving good regulation within ±5%. With LM5160's Constan On-Time control, no loop compensation is required, which simplifies the design and helps reducing the external part count and BOM cost.
Laser and Ionization Unit
PMP2534: The PMP2534 is composed of two times active clamp forward, delivering 0…35V@10Amax, two current limit functions to protect the 3.3V and 5V outputs and some interface for a microcntroller. The active clamps are constant voltage and/or constant current controllable by means of two PWM inputs. This power supply is suitable as general bench power generator from a desktop standard PSU as source.
18Vdc-36Vdc Input, 28V/100W Active Clamp Forward
PMP7294: This reference design uses the UCC2897A active clamp controller to generate an isolated 28V/3.6A output from a standard 24Vdc telecom input. This design uses diode rectification on the output stage and achieves efficiencies up to 93%. The output is adjustable down to 24V by changing a single resistor value.
36V-75VDC Input, 5V/20A Active Clamp Forward, 1/8th Brick Form Factor
PMP8366: This reference design generates a 5V/20A output from a standard 48V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD17312Q5, implemented as self-driven synchronous rectifiers, provide for a highly efficient design. This design is laid out in a standard 1/8th brick footprint and includes enable, remote sense, and output overvoltage features.
High Efficiency 100W Active Clamp Forward 220V-400VDC Input, 28V/ 3.6A Reference Design
PMP7453: This reference design generates an isolated 28V/100W output from a high voltage DC input. This design is intended to operate from the output of PFC front end regulator. The UCC2897A is used to control an active clamp forward converter. Self-driven synchronous rectifiers allow for over 92% efficiency. An accurate current limit is provided by directly sensing the output current. A clock pulse output is also provided for synchronizing with other converters.
8V-36V Input 12V/7A; Active Clamp Forward Reference Design
PMP5123: This reference design generates an isolated 12V/7A output from an 8V to 36V DC input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD19533Q5A and CSD19534Q5A allow this design to achieve a max load efficiency over 93%, with a peak efficiency of over 94%. The compact UCC27511 drivers simplify the gate drive circuitry for the synchronous rectifiers.
Primary Side Regulated Flyback Reference Design with 120VAC Input and 24V/4A Rated Output
PMP10804: This reference design implements the UCC28630 PSR controller in a flyback power supply. The UCC28630 is capable of operating in both Continuous and Discontinuous Conduction Modes which enables high efficiency while reducing inductor size and cost. Safety standards such as EN60950 require that any X-capacitors in EMC filters on the AC side of the bridge rectifier quickly discharge to a safe level when AC is disconnected. Typically, this requirement is achieved by including a resistive discharge element in parallel with the X-capacitor. However, this resistance causes a continuous power dissipation that impacts the standby power performance. In order to reduce standby power and eliminate the standing loss associated with the conventional discharge resistors, the UCC28630 device incorporates active X-capacitor discharge circuitry. In this design, less than 100mW no load power comsumption and over 88% converter efficiency is achieved.
52V-60Vdc Input, 12V/22A Active Clamp Forward
PMP7376: This reference design generates a 12V/21.7A output from 54V DC input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD18531Q5A, implemented as self-driven synchronous rectifiers, allow this design to achieve a max load efficiency of nearly 95%.
Universal AC Input, 5V/10A/50W PSR Flyback Power Supply W/Rapid Load Transient Response Ref Design
PMP10407: PMP10407 is a quasi-resonant Flyback power suppy based on the UCC28730 primary side regulation (PSR) controller demonstrating the use of wake up device UCC24650 to achieve rapid load transient response from light load condition when the system is under low frequency operation. The elimination of optocoupler using PSR topology promises higher reliability and lower system cost. The design achieves less than 50mW standby power losses and over 86% efficiency at 25% load. The design also features UCC24610 synchronous rectification controller and demonstrates the use of UCC24650's ENS pin output to enforce diode rectification at light load conditions to reduce stand-by power losses.
90 to 110Vin 12Vout @ 0.3A Non-Sync Buck Converter Reference Design
PMP10739: PMP10739 is a 3.6W buck converter using the UCC28700 controller IC. The design accepts an input voltage of 90Vin to 110Vin and provides an output of 12Vout capable of supplying 0.3A of current to the load. The UCC28700 has a frequency dithering feature for reduced EMI.
