Part Name(s) :
Description : Simple Solution for Dynamically Programming the Output Voltage of DC-DC Converters
Figure 1 shows a typical dc-to-dc converter configuration. As in many PWM controllers, the non-inverting input of the voltage feedback error amplifier is internally connected to the reference voltage, Vr. The output voltage of the converter is set by a resistor divider network R1 and R2. This configuration enables a fixed output voltage that is equal to or greater than the reference voltage. But in many power conversion designs, it is useful to vary the output to a value lower than the reference voltage and to dynamically adjust the output voltage.
The LMx31 family of voltage-to-frequency converters are ideally suited for use in simple low-cost circuits for analog-to-digital conversion, precision frequency to-voltage conversion, long-term integration, linear frequency modulation or demodulation, and many other functions. The output when used as a voltage-to-frequency converter is a pulse train at a frequency precisely proportional to the applied input voltage. Thus, it provides all the inherent advantages of the
voltage-to-frequency conversion techniques, and is easy to apply in all standard voltage-to-frequency converter applications.
. POWER-ON RESET GENERATOR
. AUTOMATIC RESET GENERATION AFTER VOLTAGE DROP
. WIDE SUPPLY VOLTAGE RANGE ... 3V TO 18V
. PRECISION VOLTAGE SENSOR
. TEMPERATURE-COMPENSATED VOLTAGE REFERENCE
. TRUE AND COMPLEMENT RESET OUTPUTS
. EXTERNALLY ADJUSTABLE PULSE WIDTH
The TL7700A series are monolithic supply voltage supervisor IC’s specifically designed for use as reset controllers in microcomputer and microprocessor systems.
.POWER-ON RESET GENERATOR
.AUTOMATIC RESET GENERATION AFTER VOLTAGE DROP
.WIDE SUPPLY VOLTAGE RANGE ... 3V TO 18V
.PRECISION VOLTAGE SENSOR
.TEMPERATURE-COMPENSATED VOLTAGE REFERENCE
.TRUE AND COMPLEMENT RESET OUTPUTS
.EXTERNALLY ADJUSTABLE PULSE WIDTH
■ GENERAL DESCRIPTION NJM2405 is a dual comparator, including the high precision reference voltage circuit. Both channels have hystersis pins, so it could provide the hysteretic function for systems. It has the wide range of operating voltage and works with less current consumption, so that it is suitable for detecting abnormal conditions, to change over to back up memories when the voltage drops off in operation.
■ FEATURES • Operating Voltage (2.5V to 20V) • Low Operating Current • Internal Low Reference Voltage • Adjustable Hystersis Voltage • Package Outline DMP8 • Bipolar Technology
These Microsemi 30kW Transient Voltage Suppressors (TVSs) are designed for applicationsrequiring protectionof voltage-sensitiveelectronic devicesthatmay be damaged by harsh orsevere voltage transients including lightning per IEC61000-4-5 andclass levelswith various source impedances describedherein.
Part Name(s) :
TSM1012 TSM1012AI TSM1012I
Description : LOW CONSUMPTION VOLTAGE AND CURRENT CONTROLLER FOR BATTERY CHARGERS AND ADAPTORS
TSM1012 is a highly integrated solution for SMPS applications requiring CV (constant voltage) and
CC (constant current) mode. TSM1012 integrates one voltage reference and two operational amplifiers (with ORed outputs - common collectors). The voltage reference combined with one operational amplifier makes it an ideal voltage controller. The other operational, combined with few external resistors and the voltage reference, can be used as a current limiter.
■ CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROL
■ LOW CONSUMPTION
■ LOW VOLTAGE OPERATION
■ LOW EXTERNAL COMPONENT COUNT
■ CURRENT SINK OUTPUT STAGE
■ EASY COMPENSATION
■ HIGH AC MAINS VOLTAGE REJECTION
■ FIXED OUTPUT VOLTAGE REFERENCE 1.25V
■ 0.5% AND 1% VOLTAGE PRECISION