2N6249 DATASHEET PDF
2N 2N 2N Units. Collector – Emitter Voltage. VCEO. . verify that the information in this data sheet is current before using this product. Visit for additional data sheets and product information. Forward Current Transfer Ratio. IC = 10 Adc, VCE = 3 Vdc. 2N 2N NPN POWER SILICON TRANSISTOR. Qualified per MIL-PRF/ T4- LDS Rev. 1 (). Page 1 of 5. DEVICES. LEVELS. 2N 2N
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S 10, Input C pF 4 5 5 5 R2 is then given by: Its early use was in low voltage inverters such as the 12 Vdc to Vdc power source for recreational vehicles and in dc to dc converters. At an input of 90 Vac, full-load output voltages are 4.
Capacitors with highly predictable temperature coefficients of capacitance are sometimes used in Table This feature can be used to accomplish an orderly and sequenced shutdown of system power supplies during a system fault condition. This method of operation is actually based on the boost variation model shown in Figure C. In addition, it should be noted that this circuit will not operate with a shorted output. See general design considerations.
Wall Mount Receptacle, No. From Figure we can see that any lead resistance between these points and the load will cause the load voltage, Vl, to vary with varying load current, it. Case is third electrical connection. In order to obtain excellent transient response performance, high frequency transistors are used in modern integrated circuit voltage regulators.
AC Input Section The operating ac line voltage is selectable for a nominal of 1 15 or volts by moving the jumper links to their appropriate positions. Total core gap is mils, and primary-winding inductance is 4. Alt of the power-supply control functions reside in the MC pulse width modulation control I.
Datasheeets & Application Notes
Remote output voltage sensing capability is pro- vided, and the supply will compensate for a combined total of 0.
For best performance, the programming resistor Rl should be connected as close to the regulator as possible to minimize line drops which effectively appear in series with the reference, thereby degrading regulation. This can be found from: Present integrated circuit and power package technology has produced IC voltage regulators which can ease the task of regulated power supply design, provide the performance required and remain cost effective.
The C2-I- and C2— inputs are connected as an undervoltage sensing circuit, and sense the center tap of a voltage divider driven with a full wave rectified signal proportional to the line voltage.
Operation of the boost circuit Figure B is more subtle in that it first stores energy in a choke and then delivers this plus energy from the input line to the load. The color code is given in Table C3 and C4 may be increased to Improve load transient response and to reduce the output noise voltage. High Efficiency Regulator Configurations When large output currents at voltages under approximately 9 volts are desired, the configurations of Figures A and 3-lOA can be utilized to obtain increased operating efficiency.
Many distributors will include data sheets for parts you order if you ask for them. Typical Regulator Circuit Layout cont.
Pin numbers in parenthesis are for the L suffix package only.
From Figurewe can determine a range of minimum capacitor values to obtain sufficient ripple attenuation. In applications where very low output noise is desired, R2 may be bypassed with Cl O. White QPL material with certifications and test reports.
Inadequate heatsinking 2, 18 IC Regulator Fails 1. An example of present parts cost in a 50 W switcher is shown in Table Second Significant Figure C? And the error amplifier in this case is nothing more than an op amp, and reference such as 2b6249 TL from Motorola.
2N 데이터시트(PDF) – Seme LAB
Improves transient response XX: Design of Capacitor-Input Filters The best practical procedure for the design of capacitor-input filters still remains based on the graphical data presented by Schade’ in Practical solutions to this problem datashret limiting the minimum load and using the right amount of filter capacitance to give the regulator time to respond to this change. The operating model for this circuit is the boost circuit variation dis- cussed earlier.
A unique flyback transformer A single control IC MC A fast-switching high-voltage transistor Single output filters in each of the four outputs The flyback base-drive circuit AC-line input voltage doublers.
Five volt regulators should be used to obtain the greatest output voltage compliance range for a given input voltage. This problem can be avoided by proper placement and connection of the filter capacitor return load as shown in Datashee Tran- sistors Q2 and Q4 provide turn-off drive to Q3 and Q5, dqtasheet.