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| 1/16 www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. power management switch ics for pcs and digital consumer products 2ch high side switch ics for usb devices and memory cards bd2062fj,BD2066FJ description high side switch for usb is a high side switch having over-c urrent protection used in power supply line of universal serial bus (usb). its switch unit has two channels of n-channel po wer mosfet. and, over-current detection circuit, thermal shutdown circuit, under-voltage lockout and soft-start circuit are built in. features 1) dual n-mos high side switch 2) current limit threshold 2.4a 3) control input logic active-low : bd2062fj active-high : BD2066FJ 4) soft-start circuit 5) over-current detection 6) thermal shutdown 7) under-voltage lockout 8) open-drain error flag output 9) reverse current protection when switch off 10) flag output delay filter built in 11) power supply voltage range 2.7v~5.5v 12) ttl enable input 13) 0.8ms typical rise time 14) 1 a max standby current applications pc, pc peripheral usb hub in consumer appliances, car accessory, and so forth line up matrix parameter bd2062fj BD2066FJ current limit threshold (a) 2.4 2.4 control input logic low high number of channels 2ch 2ch package sop-j8 sop-j8 no.11029ebt15
technical note 2/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. technical note 3/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? ? ? ? ? technical note 4/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? ? ? ? ? technical note 5/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. a gnd in en1 en2 /oc1 out1 out2 /oc2 v in v en 1f v en i out i out v dd gnd in en1 en2 /oc1 out1 out2 /oc2 v in v en 1f v en i out 10k 10k i out on-resistance, over-current detection /oc output low voltage fig.1 measurement circuit t on2 50% t on1 10% 90% 50% 90% 10% t off1 v out v/ en t off2 t on2 50% t on1 10% 90% 50% 90% 10% t off1 v out v en t off2 fig.2 timing diagram fig.3 timing diagram technical note 6/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. technical note 7/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. 0 5 10 15 20 -50 0 50 100 ambient temperature: t a ( ambient temperature: t a () turn off time: t off2 (us) technical note 8/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. technical note 9/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. gate logic1 ocd1 charge pump1 tsd1 uvlo charge pump2 ocd2 gate logic2 tsd2 /en1 en1 in /en2 en2 gnd /oc1 out1 out2 /oc2 delay delay 1 2 8 7 gnd in /oc1 out1 3 / en1 (en1) 4 6 5 out2 /oc2 top view / en2 (en2) fig.38 block diagram fig.39 pin configuration technical note 10/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. /en1(en1) /en2(en2) /oc1 /oc2 5, 8 / oc1 / oc2 out1 out2 6, 7 out1 out2 technical note 11/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? technical note 12/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. 5. error flag (/oc) output error flag output is n-mos open drain output. at detection of over-current, thermal shutdown, low level is output. over-current detection has delay filter. th is delay filter prevents instantaneous cu rrent detection such as inrush current at switch on, hot plug from being informed to outside. v /en v out i out v /oc out p ut shortcircuit thermal shut down delay fig.40 over-current detection, thermal shutdown timing (bd2062fj) v en v out i out v /oc out p ut shortcircuit thermal shut down delay fig.41 over-current detection, thermal shutdown timing (BD2066FJ) technical note 13/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. on/off oc oc on/off gnd in /en1 (en1) /oc1 out1 out2 /oc2 10k~100k 5v(typ.) out in vbus d+ d- gnd data regulator usb controller bd2062fj/66fj c l ferrite beads data /en2 (en2) 10k~100k c in data c l fig.42 typical application circuit ? ? technical note 14/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. 0 100 200 300 400 500 600 0 25 50 75 100 125 150 ambient temperature: ta [ technical note 15/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. (7) operation in strong electromagnetic field be noted that using ics in the strong elec tromagnetic field can malfunction them. (8) inspection with set pcb on the inspection with the set pcb, if a capacitor is connec ted to a low-impedance ic terminal, the ic can suffer stress. therefore, be sure to discharge from the set pcb by each proc ess. furthermore, in order to mount or dismount the set pcb to/from the jig for the inspection process, be sure to turn off the power supply and then mount the set pcb to the jig. after the completion of the inspection, be sure to turn off the power supply and then di smount it from the jig. in addition, for protection against static electricity, establis h a ground for the assembly process and pay thorough attention to the transportation and t he storage of the set pcb. (9) input terminals in terms of the construction of ic, para sitic elements are inevitably formed in relation to potential. the operation of the parasitic element can cause interference with circuit operation, thus resulting in a malfunct ion and then breakdown of the input terminal. therefore, pay thorough attention not to handle the input terminals, such as to apply to the input terminals a voltage lower than the gnd respectively, so that any parasitic element will operate. furthermore, do not apply a voltage to the input terminals when no power supply voltage is applie d to the ic. in addition, even if the power supply voltage is applied, apply to the input terminals a volt age lower than the power supply voltag e or within the guaranteed value of electrical characteristics. (10) ground wiring pattern if small-signal gnd and large-current gnd are provided, it will be recommended to separate the large-current gnd pattern from the small-signal gnd pattern and establish a si ngle ground at the reference poi nt of the set pcb so that resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluc tuations in voltages of the small-signal gnd. pay attention not to cause fluctuations in the gnd wiring pattern of external parts as well. (11) external capacitor in order to use a ceramic capacitor as the external capaci tor, determine the constant wi th consideration given to a degradation in the nominal capacitance due to dc bias and c hanges in the capacitance due to temperature, etc. (12) thermal shutdown circuit (tsd) when junction temperatures become detecte d temperatures or higher, the thermal shutdown circuit operates and turns a switch off. the thermal shutdown circuit is aimed at isolati ng the lsi from thermal runaway as much as possible. do not continuously use the lsi with this circuit ope rating or use the lsi assuming its operation. (13) thermal design perform thermal design in which there are adequate margins by taking into account the power dissipation (pd) in actual states of use. technical note 16/16 bd2062fj,BD2066FJ www.rohm.com 2011.05 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? order quantity needs to be multiple of the minimum quantity. r1120 a www.rohm.com ? 2011 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes 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 of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specifications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specified in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specified herein is intended only to show the typical functions of and examples of application circuits for the produc ts. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specified in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any product, such as derating, redundancy, fire control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specified herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law. |
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