bd8311nuv-e2 ROHM Co. Ltd., bd8311nuv-e2 Datasheet
bd8311nuv-e2
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bd8311nuv-e2 Summary of contents
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... BD8311NUV ● General Description ROHM’s High-efficiency Step-up Switching Regulator Built-in Power MOSFET BD8311NUV generates step-up output including from 4 batteries, batteries such as Li2cell etc fixed power supply line. This IC allows easy production of small and a wide range of output current, and is equipped with an external coil/capacitor downsized by high frequency operation of 1.2 MHz, built-in 2.5 A rated 80 mΩ ...
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Electrical Characteristics (Unless otherwise specified °C, VCC = 7.4 V) Parameter [Low voltage input malfunction preventing circuit] Detection threshold voltage Hysteresis range [Oscillator] Oscillation frequency [Regulator] Output voltage [ERROR AMP] INV threshold voltage Input bias current ...
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Block Diagram VREG STB STBY_IO VREG FB H OSC GND 1.2MHz STOP ERROR_AMP VREF INV VCC UVLO Reference 5V REG VREF Lx SCP OSC×16000 ｃount VREG PRE PWM 80mΩ CONTROL DRIVER Soft SWOUT Start STB 50Ω Fig.2 Block diagram ...
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Description of Blocks 1. VREF This block generates ERROR AMP reference voltage. The reference voltage is 1 UVLO Circuit for preventing low voltage malfunction Prevents malfunction of the internal circuit at activation of the power supply voltage ...
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Reference Data (Unless otherwise specified 25°C, VCC = 7.4 V) 1.02 1.01 1.00 0.99 0.98 -40 - 100 120 TEMPERATURE [℃] Fig.3. INV threshold temperature property ...
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ON 2.0 1.5 OFF 1.0 - 100 150 VCC [V] Fig.12. STB threshold temperature property - 120 TEMPARATURE [℃] Fig.15. Lx Max duty temperature property 1000 800 600 400 ...
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Example of Application Input: 3 output: 10 500 mA 10V/500mA 22μF GRM32EB31C226KE16（Murata） 10p ON/OFF 200k 10k 100k 22k ● Reference Application Data 1 100 VCC=10V 80 60 VCC=7.4V VCC=8. ...
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Reference Application Data 2 (VCC = 3.5 V, 6.0 V, 8.4 V, VOUT = 180 40 120 Phase -20 Gain -60 -40 -120 -60 -180 100 1k 10k 100k 1M 100 1000 ...
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Selection of Part for Applications (1) Inductor A shielded inductor that satisfies the current rating (current value, Ipecac as shown in the drawing below) and has a low DCR (direct resistance component) is recommended. Inductor values affect inductor ripple ...
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... Bandwidth GBW (frequency when gain is 0 dB) must be equal to or lower than 1/10 of the switching frequency. To satisfy above two items BD8311NUV incorporates phase compensation devices of R4=62 kΩ and C2=200pF. These C2 and R values decide the prim ary pole that determines the bandwidth of DC/DC converter. Primary pole point frequency fp= R 2π A×( ...
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Cs and Rs setting In the step-up DC/DC converter, the secondary pole point is caused by the coil and capacitor as expressed by the following equation. 1－ 2π√(LC Duty = ( V OUT This ...
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I/O Equivalence Circuit FB VREG VREG VCC VCC STB VCC STB INV VREG FB SWOUT VREG Lx, PGND VCC 12/14 VCC VREG INV VCC SWOUT Lx PGND ...
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Precautions for Use 1) Absolute Maximum Rating We dedicate much attention to the quality control of these products, however the possibility of deterioration or destruction exists if the impressed voltage, operating temperature range, etc., exceed the absolute maximum ratings. ...
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Ordering part number Part No. Part No. VSON010V3030 <Dimension> ± 3.0 0.1 1PIN MARK 0.08 S ± 2.0 0.1 C0.25 0 0.05 0.5 0.25 − 0.04 1st 2009, March Catalog ...
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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 purpose ...