Circuits & Schematics Texas Instruments - 8

71. Solar constant lighting system uses PV-pushback-effect. Part 2 - System testing
    Vijay Deshpande
    Circuits Supply Light Solar Texas Instruments LM311
    Testing the system Testing was done at various sunlight intensities. For any given sunlight intensity, V PV , I PV , V M , I M , etc., are measured. Figure 5 shows the variation of PV power (P PVON ), converter power (P M ), and total power (P TOT ...
    Jun 10, 2024
72. Solar constant lighting system uses PV-pushback-effect. Part 1 - System description
    Vijay Deshpande
    Circuits Supply Light Solar Texas Instruments LM311
    The PV-pushback-effect with solar panels can control backup power and provide constant light output. Solar day lamps (SDLs) are made by simply connecting an LED array to a solar photovoltaic (PV) panel. SDLs represent a highly cost-effective way of ...
    Jun 6, 2024

73. 2×AA/USB: OK!
    Nick Cornford
    Circuits Supply Texas Instruments LM1117
    While an internal, rechargeable lithium battery is usually the best solution for portable kit nowadays, there are still times when using replaceable cells with an external power option, probably from a USB source, is more appropriate. This DI shows ...
    May 28, 2024
74. Improve thermal airflow sensor PSRR with just two resistors
    Stephen Woodward
    Circuits Analogue Design Measurement Texas Instruments LM10
    Self-heated transistors used as thermal air flow sensors are a particular (obsessive?) interest of mine, and over the years I must have designed dozens of variations on this theme. Figure 1 illustrates one such topology seen here (Reference 1) ...
    May 27, 2024
75. Double and invert 5 V to generate ±10 V using two generic chips and two bootstraps
    Stephen Woodward
    Circuits Analogue Design Supply Texas Instruments CD4053BE
    Integration of analog circuitry with digital logic often requires the addition of an extra supply rail or two. The excellent PSRR of precision op-amps (typically 100 dB) makes them unfussy about power rail variations. This simplifies power supply ...
    May 23, 2024
76. FET biasing targets battery-powered PWM applications
    Steve Franks
    Circuits Supply Texas Instruments TPA2010D1YEFT
    Many PWM (pulse-width-modulated) applications, such as Class D audio amplifiers, require symmetric drive circuitry. Comprising complementary N- and P-channel FET devices with gates and sources connected, the textbook CMOS pair in Figure 1 provides ...
    May 23, 2024
77. High-current, low-voltage shunt regulator
    Robert Buono
    Circuits Supply Texas Instruments TLV431
    This design idea describes a high-current (up to 8 A) shunt-regulator built around the TLV431 low-voltage, adjustable, precision shunt-regulator IC. Special attention was paid to implementing this design as a two-terminal circuit block, greatly ...
    May 16, 2024
78. Non-linear pullup for multi-rate I²C buses
    Christopher Paul
    Circuits Interfaces Microcontrollers Usage Texas Instruments SN74LVC2G66 SN74LVC74APWR TLV3202
    I 2 C is a popular bidirectional serial communications bus having a clock and a data line. Both line’s drivers consist of an open drain ground-referenced N-channel MOSFET with a pullup resistor connected to a supply ranging from 1.8 V to 5 V. ...
    May 13, 2024
79. Adaptable pullup
    Peter Demchenko
    Circuits Interfaces Texas Instruments TS5A3159
    It’s common for I 2 C systems to have both standard and fast devices on the same bus. For I 2 C systems, the speed and power consumption both depend on the values of pullup resistors: the values of them should be low enough to secure the fast ...
    Apr 24, 2024
80. A new and improved latching power switch. Part 2
    Circuits Supply Texas Instruments LM393 TLC393
    Although adequate for undemanding applications, the circuit suffers from several drawbacks which may limit its suitability. The Darlington’s current gain (which can vary considerably from device to device and with temperature) plays a ...
    Apr 5, 2024

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