bd8621efv ROHM Co. Ltd., bd8621efv Datasheet
bd8621efv
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bd8621efv Summary of contents
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... DC/DC converters BD8621EFV ●Description BD8621EFV has realized the high performance and reliability required as a power supply for thin-screen TV. With built-in FET 1ch current mode control, the DC/DC Converter series has the advantage of high-speed load response and wide phase margin. Due to the high-speed load response most suitable for TV-purpose processors with increasingly high performance, and due to the wide phase margin it leaves a good margin for board pattern & ...
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Ta=25℃, VIN=3.3V, GND=0V) Parameter VIN supply current (operating) VIN supply current (standby) Reference voltage (VREF) Output rise detection voltage Output decrease detection voltage Terminal PDET output current Oscillation frequency Pch FET ON resistance Nch FET ...
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Block Diagram ● Pin Description No. Symbol 1 Signal GND terminal SGND 2 Feed back terminal FB 3 PDET Off latch signal output 4 SW Output terminal PGND 7 Power GND terminal PGND 8 PGND 9 ...
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Pin equivalence circuit diagram No. Symbol 1 SGND 2 FB Output voltage detection terminal 3 PDET Protecting BUS I/O terminal 4,5,9,10 SW 6,7,8 PGND (Same voltage as SGND) 11,12,13,14 VIN Power supply input terminal Explanation GND (connected 0V) Output ...
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No. Symbol 15 REG Internal Regulator output voltage 16 EN Enable terminal 17 TEST Using at test mode Explanation Terminal equivalent circuit diagram ...
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No. Symbol SS Soft start time adjustment 18 /DELAY Error amplifier compensation 19 FC Oscillator frequency adjustment 20 RT Explanation terminal terminal terminal Terminal equivalent circuit diagram ...
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Enable control The device can be controlled ON/OFF by EN terminal (16 pin) voltage. An internal circuit starts when VEN reaches 1.1V. EN terminal voltage SS terminal voltage Output setting voltage Fig.2 ON/OFF transition wave form in EN ...
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Soft start time set function As for BD8623EFV, output can do soft start without overshoot by charging soft start capacity (CSS) connected between SS and SGND terminal. Also, soft start time (tss) can be set by setting soft start capacity ...
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Protection circuit is effective for destruction prevention due to accident so that avoid using under continuous protection operation. Low voltage protection function (LVP) The voltage of the terminal FB (2 pins) is compared with internal reference voltage VREF. ...
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Under voltage lock out protection (UVLO) As for BD8623EFV, the power-supply voltage decrease detection protection circuit is built in. It the input voltage decrease below the UVLO voltage (2.5V typ), the device state changes to the standby mode (Moreover, to ...
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Protecting BUS function with terminal PDET The terminal PDET (3 pins) monitors whether IC is normal or not. When IC becomes abnormal, the PDET output is reduced at "L" level with the output voltage fixed “L” level at the same ...
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VIN = 5V Vout : 100mV/div Io = 1A/div Fig.7 Output load response 100 VIN = 3. VIN = 5. 100 1000 Load current [mA] ...
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Ta = 25℃ 580.0 570.0 560.0 550.0 540.0 530.0 520.0 510.0 500.0 2.5 3 3.5 4 INPUT VOLTAGE : Vin [V] Fig.14 Switching frequency-power-supply voltage characteristic 100.0 90.0 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0 0.0 2.5 3 3.5 4 INP ...
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HTSSOP-B20 <Dimension> 6.5 ± 0 0.325 1 10 +0.05 0.17 −0.03 S 0.08 S +0.05 0.65 0.2 −0.04 （Unit:mm) <Tape and Reel information> Tape Embossed carrier tape Quantity 2500pcs Direction E2 (The direction is the 1pin of product ...
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Appendix No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product ...