Motor pre-drivers target automotive/safety
The DRV3202Q , DRV3203Q, and DRV3204Q are FET pre-driver ICs designed for 3-phase motor control in applications such as oil or water pumps. They have PWM frequencies up to 20 kHz and three high-side and three low-side FET drivers which are controlled by an external MCU. They aid designers in meeting functional safety requirements.
Analog_Mixed_Signal_ICs/Power_Management/ICAJH01_TI_1S_Sep2013 (please use the hi-res version)
The power for the high side is supplied by a charge pump and no bootstrap capacitor is needed. Diagnostics are built in and a current-sense amplifier and comparator allow for current monitoring. The DRV3202 has a CAN interface and all three devices use an SPI port for setup. Priced from $2.80 ea/100.
Texas Instruments , www.ti.com
Linear regulator targets high-in/out applications
The LT3081 1.5-A linear regulator has an extended safe operating area (SOA) compared to existing regulators, making it suitable for high–input-to-output voltage and high-output current applications. It uses a current-source reference for single-resistor output-voltage settings and output adjustability down to 0 V. Output current limit can be set externally with a single resistor.
Analog_Mixed_Signal_ICs/Power_Management/icpo01_LTC_LT3081_aug2013
The linear regulator architecture, combined with mV regulation, enables multiple ICs to be paralleled for heat spreading and higher output current. The device achieves line and load regulation of
Linear Technology , www.linear.com
Fast-charge tech squeezes more life from Li-ion battery
Two power management chipsets with patented fast-charge technology allow consumers to charge single-cell Li-ion batteries faster than other charging technology on the market. The bq27530 and bq27531 fuel gauge circuits, coupled with the bq2416x and bq2419x chargers, optimize battery performance using the highest possible charge rates with minimal battery degradation.
Analog_Mixed_Signal_ICs/Power_Management/icpo06_TI_BqNPR_jul2013
The power management chipset also features a degradation modeling system that helps minimize charge time while extending battery service life by as much as 30%, according to lab tests. The bq27530 and bq24160 chipset for 2.5-A charge rates and the bq27531 and bq24192 chipset for 4.5-A charge rates give designers flexibility by having the gauge control the charger directly. The battery management system reduces software overhead and allows a designer to adapt the charging algorithm to support different platforms and newer higher capacity batteries.
Texas Instruments , www.ti.com
PMIC reduces thermal stress in tablet processors
The AS3721 power management IC features a remote-feedback circuit that helps reduce the thermal stress of applications processors in smartphones and tablets. When paired with the AS3729 point-of-load regulators, the two offer a fast response to load transients and are optimized for Tegra applications processors from Nvidia.
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The PMIC enables a compact remote feedback path from the processor to the IC’s integrated dc/dc controllers. A patent-pending design features a feedback interface that needs only two wires instead of the four or five wires typically required by other PMICs. The feedback loop maintains the processor within a safe operating voltage even when supplying fast-changing loads. Using an output capacitor of 40 µF and at an output voltage of 1.0 V, the system’s voltage drop during a step up from 0.5 to 5 A in burst mode is 32 mV (typical). The PMIC can combine up to four devices in an eight-phase configuration that supplies a 20-A maximum output. The PMIC features four dc/dc step-down regulators supplying 4-, 2- and 1.5-A; three dc/dc step-down controllers rated for 5, 10 and 20-A, and 12-digital LDOs.
AMS , www.ams.com
Boost converter maintains 84% efficiency over a 100:1 output current
The TS3300 boost regulator uses 3.5-µA supply current, and features 84% efficiency performance over 100:1 output current span. It is the first boost with linear regulator that operates from 0.6 up to 4.5-V supply voltages and can deliver at least 75-mA continuous output current.
Analog_Mixed_Signal_ICs/Power_Management/icppo03_Touchstone_TQFN33EP_jul2013
The boost converter can be powered from a wide variety of power sources including single or multiple-cell alkaline or single lithium batteries. The output voltage range can be user-set from 1.8 to 5.25 V to power analog circuits, microcontrollers and low-energy Bluetooth radios simultaneously. It draws 3.5-µA no-load supply current, suits “always on” and other battery-powered or portable applications. Pricing starts at $0.85 ea/1,000 pieces.
Touchstone Semiconductor , www.touchstonesemi.com
5-A buck micro-module regulator targets data converters
The LTM8028, a 1-mV output ripple µModule regulator powers data converters and high speed transceivers. The low output ripple minimizes random jitter in high speed data transceivers and improving bit error rate (BER) performance. A tri-state digital interface determines the device's output voltage, which is adjustable from 0.8 to 1.8 V in 50-mV increments. Output voltage regulation is ±1.5% accurate over temperature.
Analog_Mixed_Signal_ICs/Power_Management/icpo02_LTC_LTM8028_jul2013
The µModule regulator combines a 36-V synchronous step-down switcher, powering a 5-A linear post-regulator in a 15 x 15 x 4.92-mm BGA package. When powering an analog-to-digital converter, tests showed a 13-dB improvement in spurious free dynamic range compared to a typical step-down regulator. Output noise is 40 µVRMS from 10-Hz to 100-kHz frequency range. It operates from -40° to +125°C.
Linear Technology , www.linear.com
Triple 2-A/out regulator operates at 3 MHz
The MIC23450 and MIC23451, are triple-output, synchronous buck regulators designed with the company’s HyperLight Load technology. The MIC23450 delivers 2-A/output and the MIC23451 provides 1-A/output. Both regulators operate at 3 MHz in PWM mode. Users may program each of the three outputs independently to operate from 1.0 to 3.3 V using external resistors.
Analog_Mixed_Signal_ICs/Power_Management/icpo05_Micrel_MIC23450_jun2013
The synchronous buck regulators support an input voltage range of 2.7 to 5.5 V and suit Li-ion/polymer or alkaline/NiCad/NiMH battery applications, as well as PoL dc/dc conversions. The MIC23450 is offered in a thermally-enhanced 32-pin 5 x 5-mm MLF package and the MIC23451 is offered in a 26-pin 4 x 4-mm MLF option. The regulators offer 23-µA/channel quiescent current and achieve 81% efficiency at load current of 1 mA.
Micrel , www.micrel.com
Battery charger integrates 500-mA USB OTG supply
The FAN54015 USB-compliant single-cell Li-ion switching charger employs a, 3-MHz dc/dc synchronous buck converter capable of supplying 1.45 A. The device’s system architecture allows reverse use of the switch-mode buck converter, resulting in a 500-mA USB on-the-go (OTG) boost regulator, and providing power for USB peripherals. Additionally, to accommodate legacy and emerging lithium battery technologies, the regulated battery float voltage can be programmed from 3.5 to 4.44 V.
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To protect the battery and maximize mobile device usage time, the charger supports battery charging in three phases: pre-conditioning, constant current (CC), and constant voltage (CV). An integrated over-voltage protection FET blocks current flow when the input voltage reaches dangerous levels, eliminating the need for an external protection MOSFET. It is available for $1.27 ea/1,000.
Fairchild Semiconductor , www.fairchildsemi.com
Battery charger offers safe charging for portables
The MAX77301 Li+ battery charger integrates the intelligence to enumerate with the host device, automatically identify the adapter type, and then determine the fastest rate to charge a battery. With advanced temperature monitoring, the MAX77301 modulates the charge current and battery regulation voltage automatically to maximize safety in any temperature environment. It performs all of these functions without an external CPU or system hardware. The MAX77301 suits mobile equipment, such as cameras, Bluetooth headsets, MP3 players, and portable medical devices.
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The battery charger automatically sets charge parameters at a safe level. The device also provides full programmability via the I2C interface, increasing flexibility. It integrates an enumeration and adapter detection engine to maximize charge current and to ensure safe and fast charging. Pricing starts at $2.22 ea/1,000 in a 25-bump 2.44 x 2.44-mm wafer-level package.
Maxim Integrated , www.maximintegrated.com
Charger ICs target photovoltaic sources
Used for managing charging with photovoltaic sources, the ZSPM4521 Li ion battery charger and the ZSPM4523 supercapacitor charger are configurable for termination voltages and charge currents to allow optimum charging for a wide range of Li-ion batteries or super capacitors. They can regulate up to 1.5-A continuous drive current and use a maximum power point tracking (MPPT) function to extract the maximum possible power from the photovoltaic charging source.
Analog_Mixed_Signal_ICs/Power_Management/icpcn_zmd_may2013
Features include a switching frequency of 1 MHz, an efficiency of up to 92%, an integrated I2C interface with EEPROM registers. Available each per 1,000, ZSPM4521 is $1.85 and ZSPM4523 is $1.58. The ZSPM4521 has an additional charge timeout feature to protect the Li-ion battery from overcharge. Both provide protection for overcurrent, overtemperature, overvoltage and undervoltage. Housed in a 16-L PQFN package, the parts operate from –40º to 125ºC.
ZMDI , www.zmdi.com
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