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Output is short circuit protected. The LM is a 10 amp regulator adjustable from 1 25V to 15V which uses a revolutionary new IC fabrication structure to combine high power discrete transistor technology with modern monolithic linear IC processing This combination ,m396k a high-performance single-chip regulator capable of supplying in excess of 10 amps and operating at power lev- els up to 70 watts The regulators feature on-chip trimming of reference voltage to.

Power NPNs have low collecter resistance and do not require collector bond wires Collectors are all common to substrate Standard NPNs are still isolated.

LMK Datasheet PDF – National ->Texas Instruments

Adjustment pin current change is specified for the worst-case satasheet of input voltage output current and power dissipation Changes due to. Three-terminal regulators can only provide partial Kelvin load sensing see Load Regulation Full remote sensing can be added by using an external op amp to cancel the effect of voltage drops in the datahseet positive output lead In. Operating Junction Temperature Range. A quick look at the curves show that heat sink resistance i. To obtain output noise multiply by.

Using lm/ to convert 12v/18a to v/a

Analog Layout Finger Size 4. Because of its extremely high power dissipation capability the. The time now is Proper transformer ratings are very important in a high cur- rent supply because of the conflicting requirements of effi- ciency and tolerance to low-line conditions A transformer with a high secondary voltage will waste power and cause unnecessary heating in the regulator Too low a secondary voltage will cause loss of dafasheet under low-line condi- tions The following formulas may be used to calculate the required secondary voltage and current ratings using a full- wave center tap.


Please don’t make requests for help in private using PM. Dropout voltage is input-output voltage differential measured at a forced reference voltage of 1 15V with a 10A load and is a measurement of the. Also i’m jst being curious; will the lm always deliver by default 5A, Irrespective of the current input from the dc source. R3 is selected to supply partial load current Therefore a minimum load.

See Curves for Limits. R3 if continuous output shorts are possible 2 Under normal load condi- tions system power dissipation is not changed eatasheet under short circuit condi- tions.

Datasheets search archive of electronic components datasheets

Digital multimeter appears to have measured voltages lower than expected. If you look page 9 of the datasheet it gives you the complete information and calculating R3. For the same conditions as before with TC. The LM will tolerate a wide range of input and output capacitance but long wire runs or small values of output capacitance can sometimes cause problems If an output capacitor is used it should be 1 mF or larger We suggest 10 m.

If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications. Equating complex number interms of the other 6.

Minimum load current of 10 mA is normally satisfied by the resistor divider which sets up output voltage. Current limit is measured 10 ms after a short is applied to the output DC measurements may differ slightly due to the rapidly changing junction temperature.

Regulation of master unit is unchanged Load or input voltage changes on slave units do not affect other units but all units will be affected by changes on master A short on any output will cause all datasyeet outputs to drop to approximately 2V. PV charger battery circuit 4.

datashet Using single 12V supply to deliver 12V and 5V The actual heat sink chosen for the LM will be deter- mined by the worst-case continuous full load current input voltage and maximum ambient temperature Overload or short circuit output conditions do not normally have to be considered when selecting datashert heat sink because the thermal shutdown built into the LM will protect it under these conditions An exception to this is in situations where the regulator must recover very quickly from overload The LM may take some time to recover to within specified output tolerance following an extended overload if the regu- lator is cooling from thermal shutdown temperature approx- imately to specified operating temperature C or C The procedure for heat sink selection is as follows.

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Better still anyone who can give me a schematic datasyeet i can jst construct it i would be very grateful i’m jst a l engr student.

Hope it may help a bit, dataasheet further query is welcomed. AF modulator in Transmitter what is the A? The factor of 1 1 is only an approximate factor accounting for load regula. Ripple rejection is measured with the adjustment pin bypassed with 25 mF capacitor and is therefore independent of output voltage With no load or.

Lm396i can use for higher output voltage but the difference between Vin-Vout should not exceed the specifications at the recommended Junction Temperature. Thermal as well as electrical load regulation must be con- sidered with IC regulators Electrical load regulation occurs in microseconds thermal regulation due to die thermal gra- dients occurs in the 0 2 ms ms time frame and regula- tion due to overall temperature changes in the die occurs over a 20 ms to 20 minute period lm396 on the time constant of the heat sink used Gradient induced load regu- lation is calculated from.

Last edited by deze4; 30th August at