News

PTC launches Class-D Amplifier for portable applications – PT2333 [ 2007/6/8 ]
PTC has launched its first 2.5W Mono Class-D Amplifier (PT2333) specifically designed for mobile phones, GPS PNDs and PMPs

Compared with traditional Class-AB amplifiers, which have been plagued by overheating problems, the PT2333 is capable of much higher efficiency (> 85%) and consequently generates much less heat. The PT2333 is based on an advanced CMOS process and utilizes Class-D circuitry exclusively designed by PTC in order to achieve its high efficiency performance. The PT2333 produces a maximum output power of up to 2.5W (VDD = 5V, RL = 4Ω, THD = 10%) and will work reliably without a heat sink.

The PT2333 is fully compatible with the TPA2010. To support customers with limited PCB space, a simplified output filter stage may be used. The PT2333 is offered in a choice of small form-factor packaging (9-pin CSP for mobile phones and 10-pin MSOP for GPS PND, PMP, and PDA applications) which can meet stringent mechanical requirements typical for mobile designs.

About PTC

PTC has accumulated many years of experience in the design and manufacture of Class-AB and Class-D amplifiers used in products such as PDAs, electronic dictionaries, PC speakers, iPod speakers, LCD monitors, and LCD TVs. In the past 5 years, PTC has successfully launched a series of amplifiers capable of delivering a range of powers from 1W to 20W. Based on it, PTC has established its reputation in the LCD TV and iPod speaker markets and has become an expert in Class-D amplifier designs.
PTC launches Hybrid Audio Input USB Speaker Controller IC - PT8915 [ 2007/10/29 ]
Due to the tremendous increase in popularity of portable devices including iPods/iPhones/PDAs, device designers have begun to require USB Audio Player Platforms that integrate more advanced functions and achieve better audio fidelity. With proven expertise in Audio IC design, Princeton Technology Corp. (PTC) has risen to the challenge of meeting these new requirements by launching a total solution USB Speaker Controller IC (PT8915).

The PT8915 utilizes a fully integrated architecture to deliver a USB audio player platform. The PT8915 introduces an exclusive Hybrid-Audio Play feature that allows it to support both digital and analog audio inputs. The PT8915 includes volume control and LINE IN select functions for analog audio input and can successfully integrate various audio inputs from desktop PCs, MP3 players, or mobile phones. Built-in Class-D amplification also provides high efficiency, good sound quality and a large audio dynamic range.

The PT8915 is certified by USB-IF and has received USB 2.0-full speed certification. The PT8915’s simple architecture offers customers a production-ready solution to help save both development time and cost. The PT8915 is a truly plug and play USB audio device without installing any drivers. PTC has also developed the technology to control the switching between two USB devices, and submitted a patent application for this technology, which can provide IP protection for customers.

PTC’s PT8915 USB Audio Player solution provides increased flexibility, superior sound quality, and includes the exclusive Hybrid-Audio Play feature. Many end-manufacturers worldwide have begun to use the PT8915 to develop new products, including Audio-Docking Stations. The PT8915 has also been positively evaluated for use in applications such as USB speakers and iPod docks.
Mobile-Use Class-AB Audio Power Amplifiers – PT2366 &PT2367 [ 2008/4/28 ]
The PT2366 & PT2367 are Class-AB Audio Power Amplifiers designed specifically for mobile phones and portable audio applications. They are highly pin-compatible. They can deliver 1.1 W (RL = 8 Ω,THD < 2 %) power output under 5 V supply voltage. PTC's pop-and-click noise reduction circuitry eliminates noise during turn-on and turn-off transients. In addition, the built-in over-temperature protection and shutdown function (Icc < 0.1 uA) prevent overheating problems. Each of the PT2366 and PT2367 requires few external components and delivers high output power without capacitance. They also achieve excellent heat dissipation within the miniaturized and lead-free package (WCSP-8). The PT2366 & PT2367 are clearly the best choice for portable applications.
PTC launched Mobile-use Class-D Stereo Audio Power Amplifier IC─PT2004 [ 2008/9/25 ]
PTC is please to introduce the PT2004 which is a stereo audio amplifier IC well-suited for mobile phones and portable audio devices. It is pin-compatible with the TPA2012.

PT2004 is capable of operating without a wave filter with an output power of 2.2 W. The PT2004 provides four choices for setting voltage gain (6/12/18/24 dB) and includes audio click-and-pop suppression circuitry to reduce audible transients during power-up and shut-down cycles.

Required external components are few and the PT2004 is packaged in a 16-pin WCSP (2mm x 2mm) with good thermal conductivity for enhanced heat dissipation. The PT2004 is the best choice for portable device applications.
PTC Formally Enters Automotive Electronics Market by Launching Single-chip GPS Receiver-PT9250 [ 2008/9/26 ]
Princeton Technology Corp. (PTC) will be showing its latest energy-saving LED driver and dimming controller lighting solution ICs on November 10-12, 2010 at the FPD International & Green Device Exhibition. The demonstration will include 650V multifunction electronic ballast driver ICs (PT56XX series), high power LED driver ICs (PT69XX series) for LED backlighting, and the CC driver ICs (PT67XX series) for billboard display applications.

The PT56XX electronic ballast driver ICs include the dimming controller series and the ballast series. The dimming controller ICs are reliable and easy to use and are suitable for various types of dimming applications such as remote, VR, 3-way switching, normal switching, and normal switching with linear dimming. The ballast ICs integrate more functions, including security protection, APFC, 650V half-bridge high-side driver, and support for multi-lamp applications.


The PT6905, PT6910, and PT6920 high power LED driver ICs are intended for low voltage LED lighting applications such as decorative and emergency lighting. Each IC provides protection functions and is housed in a small size package (SOT89). Both the PT6905 and PT6910 integrate a 40V/1.2A MOS switch, while the PT6920 integrates a 60V/1.2A MOS switch. With the PT6905’s built-in three-stage dimming control, a normal switch dimming function may be realized.

For high voltage LED lighting applications such as home and office lighting, PTC’s PT6907, PT6909, and PT6911 ICs feature low start-up current and low stand-by power dissipation. The PT6907 integrates a linear dimming controller function and is suitable for synchronous application while offering more flexibility for group control. The PT6909 integrates a single-stage PFC boost-buck topology which brings a normal LED driver circuit’s PF up to more than 0.9. The PT6911 operates in hysteretic PFM control mode. This architecture enables high accuracy LED current control without the need for high-side current sensing or the inclusion of any closed-loop controllers. Its hysteretic control method can achieve both good line regulation as well as load regulation. In addition, the PT6911 provides a soft-start feature.

For car LED lighting, the PT6912 high power LED driver IC integrates a 40V/350mA MOS switch and various protection functions. Operation at 2MHz frequency prevents un-wanted interference to radio frequency circuitry. The PT6970, PT6971, and PT6975 are intended for LED back-lighting applications. The PT6970 supports 6-channel LED drivers; the PT6971 supports 2-channel LED drivers; and the PT6975 supports 8-channel LED drivers. Their peak currents may reach 120mA, 200mA, and 100mA, respectively, per channel.


The PT6726 is a 16-channel, constant current driver IC suitable for LED billboard applications. The PT6726 includes a serial buffer for data latch function, and its output pins are guaranteed capable of supporting voltages up to 17V. With 5V LED voltage supply, its output can cascade 1 to 2 LEDs. The PT6726 can control LED luminance not only by current magnitude, but also by PWM cycling rate. Its output PWM pulse width may be as low as 100ns, which can satisfy the high speed PWM demands for controlling luminance and hue.

PTC is looking forward to your visit to Booth No. 5316.

About PTC
PTC has utilized its core technical expertise and experience to successfully develop a series of energy-saving LED driver and dimming controller lighting solutions for applications including billboards, dimming fluorescent tubes, 3-way CFL, LED backlighting, decorative lighting and automotive interior LED lighting. PTC is a reliable partner for your future lighting solution needs.
PTC launched High Power LED Driver ICs ─ PT6901/PT6903/PT6904 [ 2008/10/1 ]
Princeton Technology Corp. (PTC) has worked to develop technology for more energy efficient lighting and is pleased to announce the High Power LED Driver IC series (PT6901/PT6903/PT6904, the PT69XX series). The PT69XX series may be applied to LED backlighting, DC/DC or AC/DC LED devices, constant current lighting and decorative lighting applications. The PT6904 may also be used in automotive interior lighting.

PTC’s High Power LED Driver ICs have the advantages of multiple protection schemes and high efficiency. The output efficiency is more then 85% (the PT6901) or 90% (the PT6903 and PT6904). Each member of the PT690X series provides both Linear Dimming and PWM dimming functions and multiple protection schemes including UVLO, soft reset, input current limit function, constant current output, LED start protection, and short circuit protection. Additionally, each member is capable of accurate luminance control which assists in decreasing cost and simplifying design.
PTC launched multi-function dimming controller ICs─PT5611/PT5621/PT5631 [ 2008/10/3 ]
Princeton Technology Corp. (PTC) is pleased to announce the launch of Dimming Electronic Ballast Controller ICs (PT5611 and PT5631) and a 3-way Dimming CFL Controller IC (PT5621).

The PT5611 and PT5631 Dimming Ballast Controller ICs incorporate VCO circuitry and implement closed-loop phase control to control the switching frequency of a half bridge to determine the power delivered to the lamps. The PT5611 and PT5631 support a high degree of flexibility and may be used in applications requiring traditional SCR dimming (PT5631) or potentiometer or remote controller dimming (PT5611).

The PT5621 is a 3-way Dimming CFL Controller IC for 3-way switch dimming products and implements closed-loop current feedback control while supporting accurate switching and oscillation frequencies. The PT5621 is a drop-in replacement for other IC products with the same specification.

The PT56XX series is offered in either DIP16 or SOP16 package types.
PTC RF receiver and transmitter ICs-PT4301/PT4316/PT4450 [ 2008/10/9 ]
Princeton Technology Corp. (PTC) is pleased to announce RF receiver and transmitter ICs (PT4301/PT4316/PT4450), which have advantages of low power consumption and high sensitivity. Both of the PT4301 and PT4316 are low power single-chip UHF receiver ICs. The built-in low noise amplifier, image-rejection mixer (only on PT4301) and Auto Gain Control all contribute to the ability to achieve outstanding receiving sensitivity and robust interference immunity. The PT4301 is well-suited for use in long distance wireless transmission links, shutter control systems and remote lighting which must work reliably in electro-magnetically noisy environments. In addition, a built-in voltage regulator allows the PT4301 to operate over a wide supply voltage range (2.4 to 5.5V). The built-in ASK demodulator supports various coding methods and provides flexible adjustability.

The SAW-based transmitter IC (PT4450) is in the 250~500MHz frequency band, and provides high output power (3V/+10dBm) and excellent transmission rate (50Kbps). The PT4450 is used in auto remote chip locks, Keyless Entrance Systems, wireless security systems, remote control systems and products applied on wireless sensors.
High Sensitivity OOK /ASK Superheterodyne Receiver ─ PT4302 [ 2009/10/6 ]
The PT4302 is a single chip RF receiver designed for low power consumption, high receiving sensitivity remote control applications. The PT4302’s highly integrated design requires few external passive components, leading to savings in PCB area, and its current consumption is less then 3mA at 5V supply voltage when operating in the 315MHz frequency band.

The PT4302 integrates a low noise amplifier and a fully-monolithic PLL including on-chip VCO and loop filter, and its receiver subsystem utilizes an intermediate frequency of 10.7MHz to achieve outstanding receiving sensitivity and robust interference immunity. The PT4302 is well-suited for use in automobile/motorbike alarm systems, remote shutter control systems and lighting control systems, all of which must work reliably in electro-magnetically noisy environments. In addition, the PT4302’s built-in voltage regulator allows it to operate over a wide supply voltage range (2.4 to 5.5V). The PT4302 is housed within a small SSOP-16 package.
PTC launches USB/SD host audio decoder IC ─ PT8921 [ 2009/10/15 ]
The PT8921 is a cost-efficient, single chip solution for audio mini-combo player applications. The chip integrates a USB2.0 FS host controller, SD/MMC host controller, Sigma-Delta Audio-DAC and WAV/MP3/WMA/AAC Audio-Decoder. Few external components are needed, making the PT8921 well-suited for audio systems with USB2.0 FS host, SD/MMC host, or iPod™ certified-IC control interfaces.

The PT8921’s I/O interface is fully-compliant with both USB2.0 FS host class and SD/MMC card interface specifications, and since no special driver software is required, the PT8921 is truly a plug-and-play solution for stand-alone audio systems. Extended functions are available for additional audio sources and applications. The embedded 8-GPIO pins provide capability for customized player function keys and other adjustment features.
PTC Will Show New Lighting Solutions at Guangzhou International Lighting Exhibition [ 2010/5/5 ]
PTC’s latest green power lighting solution ICs will be shown on June, 9-12, 2010 at the Guangzhou International Lighting Exhibition-China Import and Export Fair in the Pazhou Complex. The demonstration will include High Power LED Driver ICs (PT69XX series) and 650V multi-function electronic ballast driver ICs (PT56XX series).

PTC has developed the PT6905 and PT6910 high power LED driver ICs for low voltage LED lighting applications such as decorative and emergency. lighting. Both ICs integrate a 40V/1.2Amp MOS switch, provide protection functions, include an integrated heatsink, and are housed in a small size package (SOT89). With the PT6905’s built-in three-stage dimming control, the normal switch dimming function can be realized.

For high voltage LED lighting applications such as home and office lighting, PTC’s PT6907, PT6909, and PT6911 ICs feature low start-up current and low stand-by power dissipation. The PT6907 integrates a linear dimming controller function with normal switch ON/OFF. The integrated DAC is suitable for synchronous application and offers more flexibility for group control. The PT6909 integrates a single-stage PFC boost-buck topology which brings a normal LED driver circuit’s PF up to 0.9. The PT6911 operates in hysteretic PFM control mode. This architecture enables high accuracy LED current control without the need for high-side current sensing or the inclusion of any closed-loop controllers. Its hysteretic control method can achieve both good line regulation and load regulation. In addition, the PT6911 provides a soft-start feature.

Electronic Ballast Driver ICs including the Dimming Controller series and the Ballast series will also be demonstrated at the show. The Dimming Controller ICs (PT5621、 PT5622 and PT5623) are reliable and easy to use. They are suitable for various types of dimming applications such as remote, VR, 3-way switching, normal switching, and normal switching with linear dimming. The Ballast IC series (PT5612、 PT5613 and PT5615) are integrated with more functions including security protection, APFC, 650V half-bridge high-side driver, and support for multi-lamp application.

PTC is looking forward to your visit to Hall 7.1, Booth No. A8.
PTC Will Show Latest LED Driver & Dimming Controller Lighting Solutions at FPD International & Green Device Exhibition [ 2010/9/23 ]
Princeton Technology Corp. (PTC) will be showing its latest energy-saving LED driver and dimming controller lighting solution ICs on November 10-12, 2010 at the FPD International & Green Device Exhibition. The demonstration will include 650V multifunction electronic ballast driver ICs (PT56XX series), high power LED driver ICs (PT69XX series) for LED backlighting, and the CC driver ICs (PT67XX series) for billboard display applications.

The PT56XX electronic ballast driver ICs include the dimming controller series and the ballast series. The dimming controller ICs are reliable and easy to use and are suitable for various types of dimming applications such as remote, VR, 3-way switching, normal switching, and normal switching with linear dimming. The ballast ICs integrate more functions, including security protection, APFC, 650V half-bridge high-side driver, and support for multi-lamp applications.


The PT6905, PT6910, and PT6920 high power LED driver ICs are intended for low voltage LED lighting applications such as decorative and emergency lighting. Each IC provides protection functions and is housed in a small size package (SOT89). Both the PT6905 and PT6910 integrate a 40V/1.2A MOS switch, while the PT6920 integrates a 60V/1.2A MOS switch. With the PT6905’s built-in three-stage dimming control, a normal switch dimming function may be realized.

For high voltage LED lighting applications such as home and office lighting, PTC’s PT6907, PT6909, and PT6911 ICs feature low start-up current and low stand-by power dissipation. The PT6907 integrates a linear dimming controller function and is suitable for synchronous application while offering more flexibility for group control. The PT6909 integrates a single-stage PFC boost-buck topology which brings a normal LED driver circuit’s PF up to more than 0.9. The PT6911 operates in hysteretic PFM control mode. This architecture enables high accuracy LED current control without the need for high-side current sensing or the inclusion of any closed-loop controllers. Its hysteretic control method can achieve both good line regulation as well as load regulation. In addition, the PT6911 provides a soft-start feature.

For car LED lighting, the PT6912 high power LED driver IC integrates a 40V/350mA MOS switch and various protection functions. Operation at 2MHz frequency prevents un-wanted interference to radio frequency circuitry. The PT6970, PT6971, and PT6975 are intended for LED back-lighting applications. The PT6970 supports 6-channel LED drivers; the PT6971 supports 2-channel LED drivers; and the PT6975 supports 8-channel LED drivers. Their peak currents may reach 120mA, 200mA, and 100mA, respectively, per channel.


The PT6726 is a 16-channel, constant current driver IC suitable for LED billboard applications. The PT6726 includes a serial buffer for data latch function, and its output pins are guaranteed capable of supporting voltages up to 17V. With 5V LED voltage supply, its output can cascade 1 to 2 LEDs. The PT6726 can control LED luminance not only by current magnitude, but also by PWM cycling rate. Its output PWM pulse width may be as low as 100ns, which can satisfy the high speed PWM demands for controlling luminance and hue.

PTC is looking forward to your visit to Booth No. 5316.

About PTC
PTC has utilized its core technical expertise and experience to successfully develop a series of energy-saving LED driver and dimming controller lighting solutions for applications including billboards, dimming fluorescent tubes, 3-way CFL, LED backlighting, decorative lighting and automotive interior LED lighting. PTC is a reliable partner for your future lighting solution needs.
PTC will launch PT4317 (low power consumption UHF OOK/ASK super-heterodyne receiver), PT4452 (low voltage UHF OOK/ASK/FSK transmitter), and PT4455 (low voltage UHF OOK/ASK transmitter) [ 2010/12/1 ]
The PT4317 is an enhanced version of the PT4316 UHF receiver IC. The original PT4316 relied a SAW resonator to form the local oscillator and can operate over the frequency range from 250MHz to 500MHz while requiring few external components. The new PT4317 offers significant improvements. The PT4317 reduces the IF bandwidth to 600KHz, which helps to increase interferer immunity as well as improve receiver sensitivity. The PT4317 LO spur level is also reduced, enabling easier compliance to RF leakage standards. In addition, the PT4317 turn-on time is reduced, making the PT4317 well-suited for customers who require low latency power-saving mode operation.

The PT4452/PT4455 transmitter ICs both utilize a crystal oscillator-based PLL topology in order to achieve the lowest frequency offset. In the 250MHz to 450MHz frequency band, the PT4452/PT4455 can achieve +10dBm output power using a 3.0V supply voltage. The PT4452/PT4455 also require the fewest external components to implement a fully-functional UHF transmitter compared with other competitors on the market, helping to reduce the size of the PCB real estate required.
PTC launches USB/SD Host Solution for Digital Audio Decoding-PT18922 [ 2010/12/28 ]
Joining the mainstream trend in pursuing green product technologies, PTC has developed a new multi-function integrated audio decoder PT18922, which may be applied to both in-car and in-home audio applications. The PT18922 integrates a USB/SD host controller and a multi-format audio decoder and is able to meet high performance system requirements and stringent reliability testing while consuming lower power than comparable ICs on the market today. The built-in universal micro-controller allows for easier program editing and updating and the PT18922 requires fewer external components than traditional products resulting in reduced PCB area requirements and lower production costs.

If you need further product information, please visit our "Product" website.
PTC 16-Channel Constant Current Sink for LED Driver-PT6726 [ 2011/2/24 ]
The PT6726 is a 16-channel, constant current driver IC suitable for LED billboard applications. The PT6726 includes a serial buffer for data latch function, and its output pins are guaranteed capable of supporting voltages up to 17V. With 5V LED voltage supply, its output can cascade 1 to 2 LEDs. The PT6726 can control LED luminance not only by current magnitude, but also by PWM cycling rate. Its output PWM pulse width may be as low as 100ns, which can satisfy the high speed PWM demands for controlling luminance and hue.

If you need further product information, please visit our "Product" website.
PTC LED Driver for Car-Brake Light With High Efficiency, High Integration And Multiple Protection Schemes - PT16922 [ 2012/4/10 ]

The PT16922 is designed to operate as a constant current source for car brake- and tail-light applications using buck topology.  A 4-channel output is provided to drive additional LEDs in 12V automotive systems. The maximum output current for each channel is up to 250mA in brake-mode and 15mA in tail light-mode.  The current for each mode may be set separately.  Changing the operating mode between brake- and tail-light modes may be accomplished thru the use of an external brake signal.  The response time in brake-mode is less than 10ms.

The PT16922 uses a heat spreading HTSSOP24 package for improved reliability. The PT16922 also includes multiple protection schemes, including thermal shutdown protection and temperature compensation function, output short protection, input over-voltage protection, and LED open and short protection, in order to maximize the safe operation and reliability of the product

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