参考设计
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120 VAC 7W PFC Wall Dimmable AC Linear Floating Switch LED Driver Reference Design
PMP6022: This magnetic-free (no transformer/inductor), small form-factor, LED driver circuit is ideal for use in LED lamps, downlights, and fixtures. The design takes advantage of relatively new high forward-voltage (22V), low-current (20mA) white LEDs to realize a compact design producing >800 lumens from about 9W of input power. The novel floating switch architecture produces low LED current ripple comparable to single-stage SMPS based designs while providing excellent compatability with a wide range of common household wall dimmers.
220V-400VDC Input, 12V/160W Active Clamp Forward
PMP7410: This reference design generates an isolated 12V/160W 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. Texas Instruments CSD18531Q5A synchronous rectifiers allow this design to achieve 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.
Interface to a Sin/Cos Encoder with Sitara AM437x Reference Design
TIDA-00178: The TIDA-00178 reference design is an EMC compliant industrial interface to Sin/Cos position encoders. Applications include industrial drives, which require accurate speed and position control. The design utilizes a 16-bit dual sample ADC with drop-in compatible 14- or 12-bit versions available, allowing for optimization of performance and cost. TIDA-00178 provides a direct connection to Sitara AM437x using SPI and QEP. For quick evaluation it features a 60-pin connector which directly fits the AM437x IDK. An example firmware for Sitara AM437x IDK is provided, which outputs the measured angle from the Sin/Cos encoder with up to 28-bit resolution through the Sitara’s USB virtual COM port.
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.
220V-400VDC Input, 5V/100W Active Clamp Forward
PMP7413: This reference design generates an isolated 5V/100W output from a high voltage DC input. This design is intended to operate from the output of a PFC front end regulator. The UCC2897A is used to control an active clamp forward converter. Self-driven synchronous rectifiers allow for 91% 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.
220V-400VDC Input, 12V/100W Active Clamp Forward
PMP6961: This reference design generates an isolated 12V/100W output from a high voltage DC input. This design is intended to operate from the output of a PFC front end regulator. The UCC2897A is used to control an active clamp forward converter. Self-driven synchronous rectifiers allow for over 91% 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.
