Voltage stabilizers of the KR1158 and KF1158 series. Reference data

Encyclopedia of radio electronics and electrical engineering / Reference materials

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Microcircuit stabilizers with a fixed output voltage of the KR1158 and KF1158 series (28 ratings each) are designed for use in electronic equipment for a wide range of applications. The regulating element of stabilizers of these series is included in the positive wire. A characteristic feature of stabilizers is a small voltage drop across the regulating element.

The devices are produced in a plastic rectangular case of four design options - TO-251, TO-252, TO-220 (according to the domestic classification KT-28-2), TO-263. All options are equipped with rigid, stamped tinned leads, and TO-252 and TO-263 cases are designed for surface mounting. The housing drawings are shown in fig. 1, a - d.

All four housing options have a heat sink plate. In the TO-251 case, stabilizers of the KR1158 series are made with letter indices A and B; in TO-252 - KF1158 series with indices A and B; in TO-220 - series KR1158 with indices V and G; in TO-263 - series KF1158 with indices V and G.

Pinout of devices (pin numbering from left to right, if you look at the case, located with the pins down, from the side of the marking): 1 - input; 2 - common; 3 - exit. In cases TO-251, TO-252 and TO-263, the heat sink plate 4 is electrically connected to terminal 2.

The closest foreign devices in terms of parameters are L4945, LM2930, LM2931, L48 series from SGS-THOMSON.

Main technical characteristics*

• Output voltage (dispersion), V, for KR1158EN301A, KR1158EN301B, KR1158ENZV, KR1158ENZP KF1158EN301A, KF1158EN301B, KF1158ENZV, KF1158ENZG......3±0,12
• KR1158EN3301A, KR1158EN3301B, KR1158ENZZV, KR1158ENZZP, KF1158EN3301A, KF1158EN3301B, KF1158ENZZV, KF1158ENZZG......3,3±0,13
• КР1158ЕН501А,  КР1158ЕН501Б, КР1158ЕН5В, КР1158ЕН5П, КФ1158ЕН501А, КФ1158ЕН501Б, КФ1158ЕН5В, КФ1158ЕН5Г......5±0,2
• КР1158ЕН601А, КР1158ЕН601Б, КР1158ЕН6В, КР1158ЕН6Г, КФ1158ЕН601А, КФ1158ЕН601Б, КФ1158ЕН6В, КФ1158ЕН6Г......6±0,24
• КР1158ЕН901А, КР1158ЕН901Б, КР1158ЕН9В, КР1158ЕН9П, КФ1158ЕН901А, КФ1158ЕН901Б, КФ1158ЕН9В, КФ1158ЕН9Г......9±0,36
• КР1158ЕН1201А, КР1158ЕН1201Б, КР1158ЕН12В, КР1158ЕН12Г, КФ1158ЕН1201А, КФ1158ЕН1201Б, КФ1158ЕН12В, КФ1158ЕН12Г......12±0,48
• КР1158ЕН1501А, КР1158ЕН1501Б, КР1158ЕН15В, КР1158ЕН15П, КФ1158ЕН1501А, КФ1158ЕН1501Б, КФ1158ЕН15В, КФ1158ЕН15Г......15±0,6
• Rated load current, mA, no more, for stabilizers with letter indices A, B......150
• B, G......500
• Minimum voltage drop across the stabilizer, V, at rated load current for devices with letter indices A, B......0,4
• B, G......0,6
• The instability of the output voltage on the input voltage,% / V, not more, at a load current of 5 mA and an input voltage ranging from 1 V plus output to 30 V ...... 0,05
• The instability of the output voltage for the load current,% / A, no more, for stabilizers with letter indices A, B (at an output current of 5 ... 150 mA)...... 6,9
• B, D (5...500 mA)......3
• Own current consumption, mA, no more, at rated load current for stabilizers with letter indices A, B......20
• B, G......65
• Own current consumption, mA, no more, in the absence of load......3
• Actuation current of the current protection system, mA, for stabilizers with letter indices A, B......300...700
• B, D......600...1200
• Input current of stabilizers when the output circuit is closed, mA, not more, for devices with letter indices A......700
• B......250
• B......1200
• G......350
• Temperature coefficient of stabilization voltage, %/°C, not more than......0,02
• Response voltage of the protection system by input voltage, V......30...37
• Thermal resistance of the crystal-case, °С/W, no more, for devices in the TO-251, TO-252 package......10
• ТО-220(КТ-28-2), ТО-263......5
• Thermal resistance crystal-environment, °С/W, for devices in TO-251, TO-252 cases......100
• ТО-220 (КТ-28-2), ТО-263......60
• Operating temperature range, °С......-40...+85
• * With an input voltage of 14 V, an input capacitor capacitance of 0,1 μF, an output capacitor of 10 μF, and a crystal temperature of 25 °C.

Limit operational values ​​of parameters

• The highest input DC voltage, V ...... 37
• The highest input pulse voltage, V, with an exponential pulse shape with a front duration of 10 ms and a fall of 100 ms ...... 60
• The smallest load current, mA......5
• The highest non-damaging direct input voltage of reverse polarity, V ...... 18
• The highest non-damaging pulsed input voltage of reverse polarity, V (exponential pulses, decay duration 100 ms)...... 40
• The highest allowable temperature of the crystal, °С......+150
• Output current when the output circuit is closed, mA, for devices with the letter index B......250
• G......500

The stabilizers are equipped with a very advanced built-in overload protection system in several ways, which makes these devices ideal for the needs of automotive electronics. So, for example, the stabilizer load is protected from input voltage surges (up to 60 V) in case of a sharp shutdown of the main consumer of the car's on-board network. Protection speed - up to 10 V/μs. Stabilizers withstand the supply of input voltage in reverse polarity.

The thermal protection system completely disables the stabilizer when the crystal is heated to 150°C. As soon as the temperature of the crystal drops below this threshold, the regulator comes into operation again.

To limit the power dissipation, blocking of the output voltage is introduced when the input voltage increases above 30 V.

For stabilizers with letter indices A and B, when the output circuit is closed, the output current is limited to the specified maximum value. The idealized output characteristic of these devices is shown by the solid line in Fig. 2.

The stabilizers of groups B and G have a built-in protection system that provides a negative section on the output characteristic - a dashed line. Due to this, after the protection system is triggered, the output current is limited to a lower level, which reduces the useless discharge of the battery and the heating of the stabilizer.

After eliminating the cause of the stabilizer overload and triggering the current protection system, it automatically returns to the operating mode. It should be borne in mind that at this moment the load of stabilizers with a negative section of the output characteristic should not be too large, otherwise the stabilizer may enter a mode with a lower output voltage.

In this regard, it is important to note that, in comparison with foreign devices of the L48 series, on the output characteristic of the described stabilizers, point A, from which the negative section begins and the position of which determines the current properties of the protection system, is located much lower. As a result, the probability of false positives of microcircuits is less.

A load with a large capacitive component when the power is turned on for the stabilizer is the closure of its output circuit. Therefore, the current protection system will work and will keep the stabilizer blocked until the load capacitors are fully charged. This factor is very important for the correct choice of the power of the input voltage source of the stabilizer.

A typical stabilizer switching circuit is shown in fig. 3. Input C1 and output C2 capacitors should be mounted near the stabilizer and the connections should be made with conductors of a minimum length.

For the operation of stabilizers as part of motor vehicle equipment, the switching circuit shown in fig. 4. To a large extent, it takes into account the specific features of the operation of electronic equipment on mobile objects when it is powered from the local on-board network.

Sometimes it is necessary to power the stabilizer with an increased input voltage. In such cases, a quenching resistor is introduced into the input circuit of the stabilizer.

The described stabilizers can be easily converted into current stabilizers (see the diagram in Fig. 5). Resistor R1 determines the set value of the stabilization current.

If a voltage stabilizer for a load current greater than the nameplate is required, the microcircuit is supplemented with a powerful transistor VT1, as shown in the diagram in Fig. 6.

Author: V.Smirnov, Bryansk

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