Tuesday, May 26, 2015

Switching Voltage Regulators using the TL499A IC - Electronic Design

Eltronicschool. - Do you want to design your own switching voltage regulators for your electronic project now? In this article we will show you one kinds of voltage regulator IC from Texas Instrument this is TL499A. Beside we will give you circuit schematic Switching Voltage Regulators using the TL499A IC, we also will give you link to take download manual instruction to design this voltage regulator.

Circuit Schematics

Figure 1. Circuit of Switching Voltage Regulators using the TL499A IC

Component Parts
  1. IC TL499A
  2. Inductor L = 50uH
  3. RLC = 500 ohm
  4. CP = 0.01 uF
  5. RE2 = 4.7 K
  6. CF = 470 uF
  7. RE1 = 50K


Circuit schematic like in figure 1 above is Switching Voltage Regulators using the TL499A IC. The main component to design this voltage regulator is TL499A IC. 

The TL499A is an integrated circuit designed to provide a wide range of adjustable regulated supply voltages. The regulated output voltage can be set from 2.9 V to 30 V by adjusting two external resistors. When the TL499A is coupled to ac-line power through a step-down transformer, it operates as a series dc-voltage regulator to maintain the regulated output voltage. With the addition of a battery from 1.1 V to 10 V, an inductor, a filter capacitor, and two resistors, the TL499A operates as a step-up switching regulator during an ac-line power failure. The main function blocks of the internal composition are a series regulator and a switching regulator, which can be used independently. However, the TL499A is best suited for use in a battery backup system after a power failure. Optimal conversion efficiency can be obtained by inserting a suitable resistor between the switching-current control terminal and ground, thereby restricting switching current.

All about the principles of IC TL499A, how to configure IC to produce output voltage and others, you can download this manual TL499A to design Switching Voltage Regulators using link download below.

  • Design Switching Voltage Regulators using the TL499A IC [Link]

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