bd8179muv ROHM Co. Ltd., bd8179muv Datasheet
bd8179muv
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bd8179muv Summary of contents
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... System Power Supply IC BD8179MUV Description The BD8179MUV is a system power supply IC for TFT panels. A 1-chip IC providing a total of three voltages required for TFT panels, i.e., source voltage, gate high-level, and gate low-level voltage, thus constructing a TFT panel power supply with minimal components required. ...
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OPERATING CONDITION Parameter Symbol Power Supply Voltage Voltage V MAIN SUP Voltage DRVP Voltage VDRVP DRVN Voltage VDRVN SRC Voltage Electrical Characteristics (Unless otherwise specified DC/DC CONVERTER CONTROLLER BLOCK Parameter Symbol [ ERROR AMPLIFIER BLOCK ] ...
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Electrical Characteristics (Unless otherwise specified, V 4.OPERATIONAL AMPLIFIERS Parameter Symbol Input Offset Voltage Input Range V DRIVE Current Slew Rate 5.GATE SHADING CONTROLLER BLOCK Parameter Symbol DEL Start Period DEL Source Current DEL Threshold Voltage CTL Input Low Voltage ...
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Reference Data (Unless otherwise specified 25°C, VIN=5V) 3 2.5 2 1 VIN (V) Fig.1 Supply Current (No switching ...
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... Pin Assignments Diagram FBP 25 DRVP 26 FBN 27 DRVN 28 BD8179MUV DEL 29 CTL 30 DRN 31 COM Pin Assignments PINNO. Pin name 1 SRC Highside Input for Gate Shading switch 2 REF 3 AGND 4 PGND 5 OUT1 Operational Amplifier 1 Output 6 NEG1 ...
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Block Function Step-up Controller A controller circuit for DC/DC boosting. The switching duty is controlled so that the feedback voltage FB is set to 1.233 V (typ.). A soft start operates at the time of starting. Gate-on ...
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... However, if the output continue to overload, the device is possible to activate thermal shutdown or short current protection. Timer Latch Mode Short Current Protection (SCP) BD8179MUV has SCP circuit feature to prevent the large current flowing when the output is shorted to GND . This function is monitoring V MAIN, operating properly (when the output voltage was lower than expected) ...
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... I of the coil, it may damage the IC internal element. LR BD8179MUV uses the current mode DC/DC converter control and has the optimized design at the coil value. A coil inductance ( recommended from viewpoints of electric power efficiency, response, and stability. (2) Output Capacity Settings For the capacitor to use for the output, select the capacitor which has the larger value in the ripple voltage V allowance value and the drop voltage allowance value at the time of sudden load change ...
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Setting the Phase Compensation Circuit the current mode control, since the coil current is controlled, a pole (phase lag) made by the CR filter composed of the output capacitor and load resistor ...
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Design of the Feedback Resistor Constant Refer to the following equation to set the feedback resistor. As the setting range to 330 k is recommended. If the resistor is set lower than ...
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Operation Notes 1) Absolute maximum ratings Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range may result in IC damage. Assumptions should not be made regarding the state of ...
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Thermal shutdown circuit This IC incorporates a built-in thermal shutdown circuit for the protection from thermal destruction. The IC should be used within the specified power dissipation range. However, in the event that the IC continues to be operated ...
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January Catalog No.09035EAT04 '09.1 ROHM © Published by LSI Business Promotion Group 13/13 ...
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Appendix No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM CO.,LTD. The content specified herein is subject to change for improvement without notice. The content specified herein is for the ...