diodes inc (DIOD) Key Developments
Diodes Incorporated Introduces AZV3001
Mar 25 15
Diodes Incorporated introduced the AZV3001. This new generation single-channel comparator has been specifically developed for use in battery-powered equipment that needs to operate at low voltage. The single-channel consumes only 6¼ and provides guaranteed operation from 1.6V up to 5.5V, making it well-suited for use in systems with nominal supplies of 1.8V, 3.0V or 5.0V, such as mobile phones, tablets and notebook computers, where it delivers superior performance and helps extend battery life. The comparator features internal hysteresis in order to provide immunity to undesirable small voltage fluctuations, and uses a complementary output stage, comprising P- and N-channel MOSFETS, in order to drive outputs with a full rail-to-rail voltage swing. Miniaturized package options help reduce PCB board space: the AZV3001 is offered in a 6-pin X2-DFN1410-6 package and the dual-channel AZV3002, available later this year, in an 8-pin U-FLGA1616-8 package. With a low propagation delay of 0.8µs, a low input bias current of 1pA and no risk of phase inversion when the input is overdriven, these comparators offer embedded system design engineers a general-purpose solution to almost all low-voltage portable device requirements.
Diodes Incorporated Introduces the ZXTR2105F
Mar 12 15
Diodes Incorporated introduced the ZXTR2105F. This regulator monolithically integrates a transistor, Zener diode and resistor to provide a 5V 15mA output from inputs up to 60V. Offered in a small SOT-23 package, the ZXTR2105F transistor reduces component count and minimizes PCB area in microcontroller applications, such as DC cooling fans for PCs and servers, as well motor drive, blowers and sensor applications in industrial and automotive market segments. The ZXTR2105F is designed to replace three discrete components, and when typically used to produce a stable supply of between 4.7V and 5.3V from 12V or 24V inputs, not only minimizes the solution footprint but also increases system power density and reliability. The device's 60V maximum input rating ensures sufficient headroom in the event of transient over-voltage conditions, while its excellent line and load regulation safeguards continuous operation by ensuring transient voltage drops cannot cause latch-up, which further contributes to system reliability.
Synchronous Rectifiers from Diodes Incorporated Offer High Integration and Efficiency for Portable Electronics Chargers
Mar 4 15
Diodes Incorporated introduced the APR3415 and APR34330. These synchronous rectifiers address the need for higher integration and efficiency in portable chargers by combining a driver circuit with an internal MOSFET to provide cost-effective rectification with reduced power dissipation and fewer external components. Target applications include adapters/chargers for cellular and cordless phones, ADSL modems, MP3 players, and similar portable consumer products and home appliances. The APR3415 and APR34330 are synchronous rectification switchers for 5V output-voltage applications operating in discontinuous conduction mode. Synchronous rectification can reduce secondary-side power dissipation, while the devices’ ability to sense the MOSFET drain-to-source voltage enables an optimal drive signal using fewer external components. The internal N-channel MOSFET has been optimized for low gate charge, low RDS(ON), fast switching speed and reverse recovery, which helps these devices provide a fast response to secondary-side voltage and can also improve the transient performance of a primary-side control system. The APR3415 is aimed at designs requiring output currents up to 2A and is supplied in a standard SO-8 package. The APR34330 is intended for output currents up to 1.5A and is offered in an SO-8EP exposed pad package. Both devices feature over-voltage protection (OVP) and VCC under-voltage lock out, which is not typically available on competitive devices. This not only aids system safety and reliability, but also extends the devices’ use in additional application areas, such as standby and auxiliary power supplies.
Diodes Incorporated Introduces a Family of Micro-Power 8-Bit Resolution Hall Effect Sensors
Mar 3 15
Diodes Incorporated introduced a family of micro-power 8-bit resolution Hall effect sensors for contactless switching in portable consumer electronic products, domestic appliances and industrial equipment. Operating over a supply range of 1.6V to 3.6V and a magnetic range of ±400G, the sensors allow the operating mode and sampling rate to minimize current consumption down to micro-power levels. The AH8500 and the higher accuracy AH8501, which both feature an enable pin, draw a current of just 9µA in sleep mode (default mode). The devices achieve a typical current consumption of only 12µA at 20Hz and 1.16mA at the maximum 7.14kHz sample rate. Also included in the product family are the AH8502 and AH8503, which feature a control pin, and a default-mode sampling rate of 24Hz. These two devices consume 13µA and allow the control pin to increase the sampling rate up to 7.14kHz, with a current consumption of 1.16mA. The higher accuracy, gain trimmed AH8501 and AH8503 devices help minimize any sample-to-sample variation and the need for any sensor calibration. The AH8501 and AH8503 have a sensitivity accuracy of 3% at room temperature and a null offset below 1% of supply voltage. This family of linear Hall effect sensors feature internal ADC and DAC and have a typical span linearity greater than 99.7% ensuring high linearity with the external magnetic field. A low input-referred noise characteristic of less than 0.36G helps minimize output fluctuation. The devices’ high sensitivity over its full operating range, typically 2.25mV/G at 1.6V to 4.12mV/G at 3.6V, enables designers to either boost field detection ranges or make use of weaker, lower cost magnets. With their chopper-stabilized architecture and advanced low temperature coefficient, these sensors help to minimize output offsets, drift and internal stress effects, ensuring greater stability and robustness over the full -40ºC to +85ºC operating temperature range. These devices also feature a high ESD of 6kV.
Diodes Incorporates 3W Stereo Class-D Audio Amplifier or Class-AB Headphones
Feb 26 15
Diodes Incorporated has introduced the PAM8009. This device is a 3W stereo class-D audio amplifier and class-AB headphone driver well-suited for the LCD monitor, all-in-one PC, and video projector markets. Featuring power limit technology for speaker protection and an advanced DC volume control for precise 64-step gain adjustment, this amplifier minimizes external components to achieve a highly integrated solution in compact 20-pin QFN or 24-pin SOP packages. With an output power rating of up to 2.4W/channel into 4O bridge-tied speakers at a THD+N of 1% (up to 3W at 10% THD+N), the PAM8009 provides a high-power, low-cost capability for driving the small internal speakers typically found in LCD monitors and similar types of applications. A separate connection provides for single-ended driving of stereo headphones with a power output of 60mW into 32O loads. A DC volume control with hysteresis allows for gain adjustment from -80dB to +20dB in 64 steps. Automatic gain control and under-voltage protection functions prevent speaker damage due to output clipping and will shut down the amplifier before an input device generates a ‘pop’. The PAM8009 operates from 2.8V to 5.5V supplies, consuming a quiescent current of 7mA at 5V. Thermal and over-current protection is incorporated with auto-recovery and the device is supplied in power-enhanced packages to aid power dissipation. A mute pin allows the speaker/headphone outputs to be quickly disabled, also helping to save power.