1 Overview
Rapid development of integrated voltage regulator in the past more than 10 years, at home and abroad have grown to hundreds of species. How the circuit works, with integrated linear regulator and switch integrated voltage regulator. Circuit structure, integrated single-chip voltage regulator and modular integrated voltage regulator. Min pin connection, there are three-Terminal integrated regulator and multi-type integrated voltage regulator. According to Nikon Coolpix S6100 Battery Charger the manufacturing process, semiconductor integrated hybrid integrated voltage regulators voltage regulator, thin film and thick film hybrid integrated voltage regulator. Integrated linear regulator, is poor in low voltage, high current, relatively rapid development of small volume.
MSK5101 is the United States MSKennedy the company developed a new low dropout linear regulator, high current, low power consumption, it has +3V, +5V, +12V and adjustable output. Output transistor PNP Super tubes manufactured using the technology of single-chip, so the series model of input and output voltage difference is very small. Is the internal structure of MSK5101 block diagram shown in Figure 1.
When the output current is 1 MSK5101. 5A, the pressure only 350mV, so it has high efficiency, power consumption is low. Output voltage accuracy and ensures that 1%. In addition, the series regulator is also compatible with TTL/CMOS on/off foot and fault signal output pin. MSK5100 10 foot power for effective use of space-SOIC package and shell with radiator copper joints.
MSK5101 size is very small. Its shape as shown in Figure 2, size 6. ３５ｍｍ×６． ３５ｍｍ×２． 08mm, so a lot of volume and weight limits in the application of high power voltage regulator, the series regulator with very good value for money. Therefore, can be widely used for high efficiency linear regulators, constant voltage/constant current regulators, power source, switch power supply output voltage regulator and battery-powered devices.
Main features of MSK5101 are as follows:
Radiator fittings close 10 feet form of SOIC package;
Input/output voltage difference is very small, the output current is 1. 5A, the pressure only 350mV;
3. 3V, 5V, 12V, and adjustable output;
Error signal output with open collector;
With TTL-level foot; zero-current switching;
With power reverse connection protection and load short circuit protection;
Earth Terminal current 22mA (when loaded);
Output voltage accuracy of up to 1%;
Output current of up to 1. ５Ａ。
2 main parameters
MSK5101 electrical performance parameters as listed in the table 1.
Table 1 x electrical performance parameters
3 application notes
3. 1 voltage protection
MSK5101 series regulator with input power supply polarity reverse, over-current, over-temperature (Pd) and transient voltage peaks up to 60V, protection, if the voltage regulator is used to load a negative power dual power supply, the output voltage must be in diode-clamped to.
3. 2 output capacitance
Between the output and the ground-side access a filtering capacitor can reduce the MKS5101 series regulator's output voltage ripple, best of Panasonic Lumix DMC-TS1 Battery Charger the capacitor capacity depending on the application, but should be at least more than 10 μ f. Also has direct access to both ends of a load capacitor to improve load transient response capability.
3. 3 load connection
In practice, when the regulator when the load current is large, the load method is very important. In order not to affect the load regulation, between the regulator output load impedance of the line must be very small, because the impedance which can load divider. In order to keep the regulators, the MSK5101 series regulator min load current 10mA.
3. 4 pin
MSK5101 series regulator has a compatible with TTL signal (ENABLE) pins, the PIN to TTL high level, internal bias circuit and regulator power. When the PIN to TTL low level, the internal controller shutdown, then flows into the device quiescent current of only 5 μA. If you do not need to enable features enable PIN to receive input pin.
3. 5 signal output pin
MSK5101 all fixed output voltage regulator in series products have a fault signal output pin. Open collector output circuit in the signal output pin, the PIN voltage can be increased to any voltage from 3V~26V. This feature allows the foot and any logic level interface. When the signal detected "not regulated" status, the feet effective low level output (typical voltage is 0. ２２Ｖ）。 MSK5101 of status fault signal, including input voltage is too low, over-temperature shutdown and output current limiting. In fact, when a transient high input voltage, fault signal pins will also output a high level.
3. 6 radiator selection
When on circulation heat? should be selected according to the following MSK5101 needed for series voltage regulator heatsink:
ＴＪ＝Ｐｄ（Ｒθｊｃ＋Ｒθｃｓ＋Ｒθｓａ）Ｔａ
Type: TJ-TJ;
Pd is the total power consumption;
R-θ JC for the thermal resistance junction to casing;
R-θ CS Shell to heat sink thermal resistance;
R-θ SA for the thermal resistance of the heat sink to the environment;
Ta for the ambient temperature.
Design, first power p according to the following calculation:
Ｐ＝（Ｖｉｎ－Ｖｏｕｔ）×Ｉｏｕｔ
Then, select maximum junction temperature. Maximum allowable junction temperature of 125 ° c in General. In order to calculate the thermal resistance of the heat sink to the environment you want, the junction temperature of the said arrangement should be to:
Ｒθｓａ＝[（ＴＪ－Ｔａ）／Ｐｄ]－Ｒθｊｃ－Ｒθｃｓ
Following are listed under this type of an instance of radiator selection:
If MSK5101_3. 3-voltage regulator input Vin +5V? output Vout is +3. 3V? continuous direct current Iout is 1 a. Ambient temperature of + 25 ℃, maximum junction temperature of 125 ° c. R-θ JC/W,R θ SA 5 ℃ to 0. ５℃／Ｗ。 Then:
Ｐ＝（５Ｖ－３． ３Ｖ）×１Ａ＝１． ７Ｗ
Ｒθｓａ＝[（１２５℃－２５℃）／１． ７Ｗ]－５℃／Ｗ－０． ５℃／Ｗ＝５３． ３２℃／Ｗ
Therefore, in this case, in order to ensure the junction temperature does not exceed 125 ° c, should use less than 53 ° c/w thermal resistance of the heat sink.
4 MSK5101-00 output voltage adjustment circuit
MSK5101-00 is a high performance with adjustable output voltage regulator. Output voltage adjustment circuit design using it as shown in JVC GZ-MG130 Battery Charger Figure 3. Figure, the series resistor R1 and R2 should be according to the required minimum voltage output current (10mA) to select it.
MSK5101 series regulator is a high thermal conductivity components, shell inside the radiator to heat conduction pathways of PN junction is very short. When welding on the circuit board of the device, should adopt standards for surface-mount technology. In high-power applications, thermal conductivity printed circuit boards should be opened on a hole, so that the shell of radiator heat conduction to the external heatsink. External heatsink must be grounded, because of MSK5101 is ground floor surface, when a user in the design of printed circuit board, must bear this in mind. In addition, the wiring or devices on a printed circuit board connected to the floor surface
Rapid development of integrated voltage regulator in the past more than 10 years, at home and abroad have grown to hundreds of species. How the circuit works, with integrated linear regulator and switch integrated voltage regulator. Circuit structure, integrated single-chip voltage regulator and modular integrated voltage regulator. Min pin connection, there are three-Terminal integrated regulator and multi-type integrated voltage regulator. According to Nikon Coolpix S6100 Battery Charger the manufacturing process, semiconductor integrated hybrid integrated voltage regulators voltage regulator, thin film and thick film hybrid integrated voltage regulator. Integrated linear regulator, is poor in low voltage, high current, relatively rapid development of small volume.
MSK5101 is the United States MSKennedy the company developed a new low dropout linear regulator, high current, low power consumption, it has +3V, +5V, +12V and adjustable output. Output transistor PNP Super tubes manufactured using the technology of single-chip, so the series model of input and output voltage difference is very small. Is the internal structure of MSK5101 block diagram shown in Figure 1.
When the output current is 1 MSK5101. 5A, the pressure only 350mV, so it has high efficiency, power consumption is low. Output voltage accuracy and ensures that 1%. In addition, the series regulator is also compatible with TTL/CMOS on/off foot and fault signal output pin. MSK5100 10 foot power for effective use of space-SOIC package and shell with radiator copper joints.
MSK5101 size is very small. Its shape as shown in Figure 2, size 6. ３５ｍｍ×６． ３５ｍｍ×２． 08mm, so a lot of volume and weight limits in the application of high power voltage regulator, the series regulator with very good value for money. Therefore, can be widely used for high efficiency linear regulators, constant voltage/constant current regulators, power source, switch power supply output voltage regulator and battery-powered devices.
Main features of MSK5101 are as follows:
Radiator fittings close 10 feet form of SOIC package;
Input/output voltage difference is very small, the output current is 1. 5A, the pressure only 350mV;
3. 3V, 5V, 12V, and adjustable output;
Error signal output with open collector;
With TTL-level foot; zero-current switching;
With power reverse connection protection and load short circuit protection;
Earth Terminal current 22mA (when loaded);
Output voltage accuracy of up to 1%;
Output current of up to 1. ５Ａ。
2 main parameters
MSK5101 electrical performance parameters as listed in the table 1.
Table 1 x electrical performance parameters
3 application notes
3. 1 voltage protection
MSK5101 series regulator with input power supply polarity reverse, over-current, over-temperature (Pd) and transient voltage peaks up to 60V, protection, if the voltage regulator is used to load a negative power dual power supply, the output voltage must be in diode-clamped to.
3. 2 output capacitance
Between the output and the ground-side access a filtering capacitor can reduce the MKS5101 series regulator's output voltage ripple, best of Panasonic Lumix DMC-TS1 Battery Charger the capacitor capacity depending on the application, but should be at least more than 10 μ f. Also has direct access to both ends of a load capacitor to improve load transient response capability.
3. 3 load connection
In practice, when the regulator when the load current is large, the load method is very important. In order not to affect the load regulation, between the regulator output load impedance of the line must be very small, because the impedance which can load divider. In order to keep the regulators, the MSK5101 series regulator min load current 10mA.
3. 4 pin
MSK5101 series regulator has a compatible with TTL signal (ENABLE) pins, the PIN to TTL high level, internal bias circuit and regulator power. When the PIN to TTL low level, the internal controller shutdown, then flows into the device quiescent current of only 5 μA. If you do not need to enable features enable PIN to receive input pin.
3. 5 signal output pin
MSK5101 all fixed output voltage regulator in series products have a fault signal output pin. Open collector output circuit in the signal output pin, the PIN voltage can be increased to any voltage from 3V~26V. This feature allows the foot and any logic level interface. When the signal detected "not regulated" status, the feet effective low level output (typical voltage is 0. ２２Ｖ）。 MSK5101 of status fault signal, including input voltage is too low, over-temperature shutdown and output current limiting. In fact, when a transient high input voltage, fault signal pins will also output a high level.
3. 6 radiator selection
When on circulation heat? should be selected according to the following MSK5101 needed for series voltage regulator heatsink:
ＴＪ＝Ｐｄ（Ｒθｊｃ＋Ｒθｃｓ＋Ｒθｓａ）Ｔａ
Type: TJ-TJ;
Pd is the total power consumption;
R-θ JC for the thermal resistance junction to casing;
R-θ CS Shell to heat sink thermal resistance;
R-θ SA for the thermal resistance of the heat sink to the environment;
Ta for the ambient temperature.
Design, first power p according to the following calculation:
Ｐ＝（Ｖｉｎ－Ｖｏｕｔ）×Ｉｏｕｔ
Then, select maximum junction temperature. Maximum allowable junction temperature of 125 ° c in General. In order to calculate the thermal resistance of the heat sink to the environment you want, the junction temperature of the said arrangement should be to:
Ｒθｓａ＝[（ＴＪ－Ｔａ）／Ｐｄ]－Ｒθｊｃ－Ｒθｃｓ
Following are listed under this type of an instance of radiator selection:
If MSK5101_3. 3-voltage regulator input Vin +5V? output Vout is +3. 3V? continuous direct current Iout is 1 a. Ambient temperature of + 25 ℃, maximum junction temperature of 125 ° c. R-θ JC/W,R θ SA 5 ℃ to 0. ５℃／Ｗ。 Then:
Ｐ＝（５Ｖ－３． ３Ｖ）×１Ａ＝１． ７Ｗ
Ｒθｓａ＝[（１２５℃－２５℃）／１． ７Ｗ]－５℃／Ｗ－０． ５℃／Ｗ＝５３． ３２℃／Ｗ
Therefore, in this case, in order to ensure the junction temperature does not exceed 125 ° c, should use less than 53 ° c/w thermal resistance of the heat sink.
4 MSK5101-00 output voltage adjustment circuit
MSK5101-00 is a high performance with adjustable output voltage regulator. Output voltage adjustment circuit design using it as shown in JVC GZ-MG130 Battery Charger Figure 3. Figure, the series resistor R1 and R2 should be according to the required minimum voltage output current (10mA) to select it.
MSK5101 series regulator is a high thermal conductivity components, shell inside the radiator to heat conduction pathways of PN junction is very short. When welding on the circuit board of the device, should adopt standards for surface-mount technology. In high-power applications, thermal conductivity printed circuit boards should be opened on a hole, so that the shell of radiator heat conduction to the external heatsink. External heatsink must be grounded, because of MSK5101 is ground floor surface, when a user in the design of printed circuit board, must bear this in mind. In addition, the wiring or devices on a printed circuit board connected to the floor surface
No comments:
Post a Comment