SI9122A Vishay, SI9122A Datasheet
SI9122A
Related parts for SI9122A
SI9122A Summary of contents
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... Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers DESCRIPTION Si9122A is a half-bridge controller IC ideally suited to fixed telecom applications where high efficiency is required at low output voltages (e.g. < 3.3 V). Designed to operate within the fixed telecom voltage range and withstand 100 V, 100 ms transients, the IC is capable of controlling and ...
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... Vishay Siliconix TECHNICAL DESCRIPTION Si9122A is a voltage mode controller for the half-bridge topology. With 100 V depletion mode MOSFET capability, the Si9122A is capable of powering directly from the high voltage bus to V through an external PNP pass transistor may be powered through an external regulator directly through the V pin ...
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... BOOST Analog Inputs Digital Inputs Reference Voltage Output Current Document Number: 73492 S-80038-Rev. D, 14-Jan-08 All voltages referenced to GND = 0 V Continuous 100 ms b TSSOP-20 c MLP65-20 TSSOP-20 MLP65-20 All voltages referenced to GND = 0 V Si9122A Vishay Siliconix Limit Unit 80 100 14.5 95 113.2 V 100 ...
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... Si9122A Vishay Siliconix a SPECIFICATIONS Parameter Symbol Reference (3 Output Voltage I Short Circuit Current SREF Load Regulation dVr/dir Power Supply Rejection PSRR Oscillator Accuracy ( OSC h F Max Frequency d F Foldback Frequency FOBK Error Amplifier I Input Bias Current BIAS Gain Bandwidth BW Power Supply Rejection ...
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... BST BST 10 Sourcing Sinking 10 Si9122A Vishay Siliconix Limits - °C ≤ 13 Min. Typ. Max. 7.4 9 °C 8.5 9.1 A 9.2 7.15 8 °C 8.1 8 7.35 8.05 350 550 200 3 ...
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... Si9122A Vishay Siliconix a SPECIFICATIONS Parameter Symbol Synchronous Rectifier (SRH, SRL) Drivers V Output High Voltage V Output Low Voltage t BBM1 t BBM2 f Break-Before-Make Time t BBM3 t BBM4 I Peak Output Source SOURCE I Peak Output Sink SINK Rise Time Fall Time Voltage Mode t d1DH Error Amplifier t d2DL ...
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... BBM3 BBM4 BBM3 Return to: Specification Table t BBM2 Figure 3. Si9122A Vishay Siliconix Time BST = MID V CC GND t BBM4 V CC GND Rectification Timing Sequence Primary MOSFET Drivers Secondary MOSFET Drivers www ...
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... BBM L_CONT Temperature Range - 40 ° °C Temperature Range - 10 ° °C under voltage detect and shutdown function input. Shuts down or disables switching when V IN Si9122ADLP (MLP65-20 BST ...
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... PWM Generator Timer GND BBM SS Enable Figure 4. Detailed Si9122A Block Diagram capacitor, bootstrap capacitor and the soft-start capacitor. The value of the capable of maintaining switch mode operation until the exceeds the UVLO required V (e.g via a power transformer winding and zener regulator). Feedback from the output of the switch mode supply charges ...
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... To prevent oscillations, a longer soft-start time may be needed for highly capacitive loads and/or high peak output current applications. Reference The reference voltage of Si9122A is set at 3.3 V. The reference voltage should be de-coupled externally with 0.1 µF capacitor. The V voltage shutdown mode REF and has 50 mA source capability ...
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... IN operating voltage to avoid this condition. CC INDET is forced below the lower V threshold, the device supplies INEXT R EXT PNP Ext (Si9122A) Auxillary HV DMOS REG_COMP C VCC C 0.5 µF EXT 14 REF Figure 5. High-Voltage Pre-Regulator Circuit 120 µ ...
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... Si9122A Vishay Siliconix TYPICAL CHARACTERISTICS 600 500 400 300 200 (kΩ) OSC f vs OSC OSC 10.0 9.5 9 mV/C 8.5 8.0 7 Temperature ( C) V vs. Temperature, V REG Temperature (°C) I vs. Temperature SS www.vishay.com 12 60 ...
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... V (mV) OH SRL, SRH I SOURCE Document Number: 73492 S-80038-Rev. D, 14-Jan- 100 600 800 vs 600 800 vs Si9122A Vishay Siliconix Temperature (°C) I vs. Temperature CC3 250 200 CC 150 100 50 ...
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... Si9122A Vishay Siliconix TYPICAL CHARACTERISTICS 100 (kΩ) BBM t vs BBM BBM BBM1 BBM1 VEP = kΩ BBM BBM2 BBM2 Temperature (° ...
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... BBM3 6.5 7.5 3.5 vs. V INDET 500 50 45 400 40 35 300 200 15 10 100 0.8 1 Si9122A Vishay Siliconix BBM1 BBM1 BBM1 1. BBM2 BBM2 BBM2 ...
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... Si9122A Vishay Siliconix TYPICAL WAVEFORMS SRL 10 V/div /div OUT D 10 V/div L CS2 50 mV/div 2 µs/div Figure 7. Foldback Mode V/div V/div CC 2 ms/div Figure V/div SRH 2 V/div SRL 2 V/div 500 ns/div Figure 11. Effective BBM - Measured On Secondary Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and Package Reliability represent a composite of all qualified locations ...
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... Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right ...