Micrel's MIC9130 and MIC9131 DC-DC controllers convert telecom line voltages to logic levels. The MIC9130/1 feature built-in high-voltage start-up circuitry that allows the devices to be connected directly to telecom line voltages. The 48 V nominal telecom line voltage is subject to large voltage transients; therefore the MIC9130 can operate to 180 V to ensure safe operation. The built-in start-up circuitry saves board space by integrating up to five external components. Typically the MIC9130/1 is used to step down the telecom line voltage to a logic-level voltage like 3,3 V.
The devices allow the design of very high-speed forward or flyback DC-DC power supplies. The MIC9130, for example, can switch an external MOSFET at 1,5 MHz, allowing very small external components to be used. The delay from sensing a current limit to shutting off the output driver is 34 ns, a threefold improvement over industry standard. This short delay time allows them to operate at higher frequencies.
The MIC9130 features a 50% maximum duty cycle while the MIC9131 has a 75% maximum duty cycle. The MIC9130/1 are constant frequency current-mode PWM controllers. These devices can easily be synchronised, making them ideal for noise-sensitive telecommunications applications. Both devices have soft-start functions to reduce inrush current during start-up. Low quiescent current of 1,3 mA and a resistor-programmable current sense threshold allows high-efficiency designs for low output power converters.
The MIC9130BM and MIC9131BM are housed in narrow-body SO-16 packages.
Power efficiency and robustness in electronics design
Power Electronics / Power Management
Mouser Electronics recently announced a new eBook in collaboration with Analog Devices highlighting essential strategies for optimising power systems.
Read more...USB Type-C-powered controllers Future Electronics
Power Electronics / Power Management
Diodes Incorporated has released two USB Type-C PD 3.1 extended power range sink controllers that can be embedded into battery-powered devices.
Read more...Multicell battery monitoring Altron Arrow
Power Electronics / Power Management
The LTC6811 from Analog Devices is a multicell battery stack monitor that measures up to 12 series connected battery cells with a total measurement error of less than 1,2 mV.
Read more...Full telemetry in tiny DC-DC converters RS South Africa
Power Electronics / Power Management
The FS160* series of µPOL DC-DC converters from TDK all offer full telemetry, provide increased performance, and are remarkable for extraordinary power density in the smallest sizes.
Read more...Power IC supplies 1650 W EBV Electrolink
Power Electronics / Power Management
Power Integrations has announced a two-fold increase in power output from the HiperLCS-2 chipset with the new device now being able to deliver up to 1650 W of continuous output power.
Read more...High-voltage step-down DC-DC converter Altron Arrow
Power Electronics / Power Management
The MAX17793 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operating over an input voltage range of 3 to 80 V.
Read more...High-voltage contactors RS South Africa
Power Electronics / Power Management
TDK Corporation has announced two new additions to its high-voltage contactor portfolio for harsh environments: the HVC43MC with integrated mirror contact and the HVC45 with enhanced short-circuit current handling capability.
Read more...Chokes rated at 36 A RS South Africa
Power Electronics / Power Management
TDK Corporation has launched the EPCOS SurfIND series, a new range of current-compensated ring core double chokes for high currents and surface mounting.
Read more...RF arrestor provides robust protection RFiber Solutions
Power Electronics / Power Management
NexTek’s range of coaxial RF surge and lightning arrestors are designed and built to provide robust protection for any radio or coaxial RF transmission application.
Read more...Wide-Bandgap Developer Forum 2025
Power Electronics / Power Management
To give designers the ultimate in design flexibility, the entire range of WBG power semiconductors will be provided including discretes, modules, and highly integrated solutions ranging from 40 V to 700 V for GaN and 400 V to 3,3 kV for SiC.
printer friendly version