LT4430IS6#PBF Linear Technology, LT4430IS6#PBF Datasheet
LT4430IS6#PBF
Specifications of LT4430IS6#PBF
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LT4430IS6#PBF Summary of contents
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... The LT4430 is available in the low profi le 6-lead TSOT-23 package. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...
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... Storage Temperature Range .................. –65°C to 150°C Lead Temperature (Soldering, 10 sec)................... 300°C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT4430ES6#PBF LT4430ES6#TRPBF LT4430IS6#PBF LT4430IS6#TRPBF LEAD BASED FINISH TAPE AND REEL LT4430ES6 LT4430ES6#TR LT4430IS6 LT4430IS6#TR Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. ...
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ELECTRICAL CHARACTERISTICS junction temperature range, otherwise specifi cations are at T SYMBOL PARAMETER A Error Amplifi er Open-Loop DC Gain VOL Error Amplifi er Unity-Gain Bandwidth Error Amplifi er Output Swing Low Error Amplifi er Output Swing High Error Amplifi ...
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LT4430 TYPICAL PERFORMANCE CHARACTERISTICS Feedback Reference Voltage vs Temperature 0.606 0.605 0.604 0.603 0.602 0.601 0.600 0.599 0.598 0.597 0.596 0.595 0.594 –50 – 100 125 TEMPERATURE (°C) 4430 G03 OC Charging Current vs Input Voltage ...
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TYPICAL PERFORMANCE CHARACTERISTICS Error Amplifi er Open Loop Gain and Phase vs Frequency PHASE 40 30 GAIN –10 –20 1k 10k 100k 1M 10M 50M FREQUENCY (Hz) 4430 G10 Error Amplifi er Output ...
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LT4430 TYPICAL PERFORMANCE CHARACTERISTICS Opto Driver Output Swing Low vs Temperature 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 –50 – 100 125 150 TEMPERATURE (°C) 4430 G17 Opto Driver Output Sink Current ...
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PIN FUNCTIONS V (Pin 1): This is the input supply that powers all in- IN ternal circuitry. The input supply range is 3V minimum to 20V maximum and the typical input quiescent current is 1.9mA. Connect a 1μF bypass capacitor ...
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LT4430 BLOCK DIAGRAM BIAS AND V STARTUP REFERENCE IN GENERATOR UVLO DFB + V1 – 0. 12.5μA + 1.1V ERROR Q2 Q3 0.6V AMP – 12.5μ ...
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APPLICATIONS INFORMATION Block Diagram Operation A precision voltage reference, a high-bandwidth error amplifi er, an inverting opto-coupler driver and an overshoot control amplifi er comprise the LT4430. Referring to the block diagram, a start-up circuit establishes all internal current and ...
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LT4430 APPLICATIONS INFORMATION If the fault condition ceases, the output voltage increases. In response, the error amplifi er COMP pin’s voltage decreases. This action opens switch S1, deactivates the overshoot control amplifi er and allows the OC pin capacitor to ...
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APPLICATIONS INFORMATION • • 1:N Figure 1a. Typical Flyback Converter Connection Tx1 V • • 1:N Figure 1c. Synchronous Flyback Converter Connection V OUT C OUT 4430 F01a Figure 1b. Equivalent Flyback Converter Connection ...
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LT4430 APPLICATIONS INFORMATION The second solution is to make a preregulator as shown in Figure 2b. In this example, the bias supply equals (V – Select R2 to bias Zener diode Z1 and to supply BE base current ...
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APPLICATIONS INFORMATION Generate a bias supply for a forward converter using similar techniques to that of the fl yback converter. Figure detail the three common bias circuits for the synchronous single-switch forward converter. In the fl yback ...
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LT4430 APPLICATIONS INFORMATION Figures demonstrate bias supply circuits for the fully-synchronous push-pull topology. Biasing for full- bridge schemes is identical to the push-pull circuits with the obvious difference in the primary-side drive. In Figure 4a, the bias ...
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APPLICATIONS INFORMATION Setting Output Voltage Figure 5 shows how to program the power supply output voltage with a resistor divider feedback network. Connect the top the tap point of R1/ and OUT the ...
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LT4430 APPLICATIONS INFORMATION In this example, the error amplifi typically a trans- conductance amplifi er with high output impedance and R dominates the impedance at the V C compensation for this feedback loop is directly affected by the ...
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APPLICATIONS INFORMATION In this example, the error amplifi typically a voltage error amplifi er confi gured as a transimpedance amplifi er. The opto-coupler transistor’s emitter provides feedback information directly to the FB pin and the resistor R FB ...
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LT4430 APPLICATIONS INFORMATION Setting Overshoot Control Time Figure 7 shows how to calculate the overshoot time by connecting a capacitor from the OC pin to GND. The overshoot control time set by the formula ...
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APPLICATIONS INFORMATION Next, increase C ’s value. Either use a capacitor substitu- OC tion box or solder each new value into the circuit. Monitor the start-up and short-circuit recovery waveforms. Note any changes. Figures illustrate what happens ...
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LT4430 APPLICATIONS INFORMATION START-UP V OUT 5V/DIV SHORT-CIRCUIT RECOVERY V OUT 5V/DIV t = 5ms/DIV C = 100pF OC Figure 8a. Start-Up and Short-Circuit Recovery Waveforms START-UP V OUT 5V/DIV SHORT-CIRCUIT RECOVERY V OUT 5V/DIV t = 5ms/DIV C = ...
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TYPICAL APPLICATIONS LT4430 4430fa 21 ...
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LT4430 TYPICAL APPLICATIONS • • • 22 • • • • • (%) EFFICIENCY 4430fa ...
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... MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. S6 Package ...
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... CO3 2A D4 100μF 100μF 100μF UPS840 6.3V 6.3V 6.3V D5 MBR0530 R7 11k OPTO 0.1μF 1μF 1k LT4430 GND COMP C6 0.033μ 1500Ω 1% 4430 TA02 Range: 4.5V to 13. 0909 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2004 4430fa ...