BD8622EFV-E2 Rohm Semiconductor, BD8622EFV-E2 Datasheet
BD8622EFV-E2
Specifications of BD8622EFV-E2
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BD8622EFV-E2 Summary of contents
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... BD8622EFV ●Description BD8622EFV has realized the high performance and reliability required as a power supply for thin-screen TV. 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 & constant setting and so facilitates its application design ...
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... BD8622EFV ●Electrical characteristics (Unless otherwise noted 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 UVLO voltage ...
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... BD8622EFV ●Block diagram ●Pin Description No. Symbol 1 SGND Signal GND terminal 2 FB Feed back terminal Abnormal state notification and external IC 3 PDET abnormality detection terminal Switching output terminal PGND Power GND terminal 11 VIN 12 VIN Power supply input terminal 13 VIN 14 VIN Enable input ...
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... BD8622EFV ●Pin equivalence circuit diagram No. Symbol 1 SGND GND (connected 0V Output voltage detection terminal 3 PDET Protecting BUS I/O terminal 5,6,7,8 SW Output terminal Power GND 10 PGND (Same voltage as SGND) 11,12,13 PVIN Power supply input terminal 14 SVIN Power supply input terminal www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. ...
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... BD8622EFV No. Symbol 16 EN Enable terminal Operation mode switch terminal at 17 MODE light load www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. Explanation Terminal equivalent circuit diagram 5/15 Technical Note 2009.05 - Rev.A ...
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... BD8622EFV No. Symbol SS 18 Soft start time adjustment terminal /DELAY Error amplifier compensation 19 FC terminal Oscillator frequency adjustment 20 RT terminal www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. Explanation Terminal equivalent circuit diagram 6/15 Technical Note 2009.05 - Rev.A ...
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... BD8622EFV ●Operation description Enable control The device can be controlled ON/OFF by EN terminal (16 pin) voltage. An internal circuit starts when VEN reaches 1.1V. When standing up of VIN is too steep (1msec or less), a defective start might be caused according to the state of Pascon between GND substrate pattern and power supply-when the terminal EN is short-circuited to the terminal VIN and it is used. ...
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... BD8622EFV Soft start time set function As for BD8622EFV, 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 (CSS) arbitrarily. OSC oscillation frequency setting function ...
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... BD8622EFV Light load mode operation ・Low current mode When the terminal MODE (17 pins) is made "H", low current mode operation becomes effective. The characteristic of the efficiency valuing is obtained in low current mode operation at a light load. V OUT [20mV/DIV] SW [2V/DIV [200mA/DIV] ・Low ripple mode When the terminal MODE is made " ...
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... BD8622EFV ● Protection function 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 terminal voltage falls below V the state is fixed. In that case , PDET (3pin) output changes to L. ...
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... SS terminal Thermal shut down function Thermal shut down circuit (TSD circuit) is built into BD8622EFV. When the temperature of the chip exceeds Tjmax=175, the DC/DC converter is fixed in a low voltage. TSD function is aimed to shut down IC from thermal reckless driving under an abnormal state to exceed Tjmax=175. ...
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... PDET at "L" level from the outside. When two or more BD8622EFV is used in the application, this function prevents the IC from destroying, because one IC error transmits all other ICs by PDET line in the condition that PDET terminals are connected each other. ...
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... BD8622EFV ●Each characteristic reference data Vout : 100mV/div Io = 1A/div 100usec/div Fig.11 Output load response 100 VIN = 3. VIN = 5. 100 LOAD CURRENT [mA] Fig.13 Efficiency 2.0 1.9 1.8 1.7 1.6 1.5 0.0 0.5 1.0 1.5 LOAD CURRENT [A] Fig ...
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... BD8622EFV 0.810 0.808 VIN = 3.3V 0.806 0.804 0.802 0.800 0.798 0.796 0.794 0.792 0.790 - AMBIENT TEMPERATURE : Ta [℃] Fig.16 Reference voltage - Temperature characteristic 600.0 590.0 25℃ ...
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... BD8622EFV ●Ordering part number Part No Part No. 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 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved Package EFV: HTSSOP-B20 <Tape and Reel information> Tape Embossed carrier tape Quantity 2500pcs ...
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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 ...