System Power Supply for TV Series FET Controller Type 3ch System Power Supply ICs No.09034EAT01 BD8601FV ●Description BD8601FV has realized the high performance and reliability required as a power supply for thin-screen TV. Due to the high-speed load response, it is 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. As a high-reliability design, it has various built-in protection circuits (overcurrent protection, output voltage abnormal protection, thermal protection, and off-latch function at the time of abnormality etc.), therefore as an advantage it does not easily damage in every possible abnormal condition such as all-pin short circuit test etc. and hence most suitable for thin-screen TV which requires the high reliability. ●Features 1) 3ch synchronous rectification step-down system DC/DC converter controller 2) 3ch independent ON/OFF. controllable 3) Soft start, soft off function 4) Concentrated protection control with built-in sequencer 5) Built-in low voltage protection function 6) Built-in overvoltage protection function 7) Built-in overcurrent protection function 8) Built-in RT terminal open/short protection function 9) Built-in duty clamp (90% ON) function 10) Frequency setting by external resistance is available. 11) Protection condition is output from PDET terminal. 12) Built-in external reset output function www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 1 / 15 2009.05 - Rev.A Technical Note BD8601FV ● Electric characteristic (Ta=25℃, VIN1, VIN2, VIN3=5.0V, VCC=5.0V, and GND=0V unless otherwise specified.) Parameter Circuit current 1 Circuit current 2 Symbol specification value MIN TYP MAX UNIT Condition IQ1 IQ2 - 3.5 7 8 15 mA mA CTL1,2,3=0V CTL1,2,3=VCC VREF IFBB VFCH VFCL 0.8 100 0.808 1 0.2 -70 - V μA V V mA μA dB Terminal FB and FC terminal short IFCSINK IFCSOURCE AVERR 0.792 -1 1.8 0.5 - FOSC 100 - 600 kHz FONDUTY 70 85 95 % VFB=0.7V ISS VSSTH VSSCLM VSSSTB -4.0 1.0 1.6 0.11 -2.5 1.1 1.9 0.15 -1.0 1.2 2.2 0.19 μA V V V VSS=1.0V VSS voltage, VFC=0.8V VSSSTB_HYS 5 50 100 mV RSS VSSPON 49 1.0 70 1.1 91 1.2 kΩ V VSS voltage (L→H) VSSPON_HYS 10 100 200 mV VSS voltage < Error amplifier part Ch1,Ch2,Ch3> Standard voltage （VREF) Terminal FB Input bias current Terminal FC Clamping voltage H Terminal FC Clamping voltage L Terminal FC Sink current Terminal FC Source current Open loop gain VFB=0.9V VFB=0.7V VFB=0.9V VFB=0.9V, VFC=0.4V VFB=0.7V, VFC=1.6V <OSC part > Oscillation frequency < Duty clamping part Ch1,Ch2,Ch3> Max ON duty ratio < Soft start part Ch1,Ch2,Ch3> Charging current Terminal SS Threshold voltage Terminal SS Clamping voltage Terminal SS Standby voltage Terminal SS Standby voltage Maximum hysteresis error Terminal SS Discharge resistance Terminal SS Protection circuit start voltage Terminal SS Protection circuit start voltage Maximum hysteresis error < Low voltage, over voltage detection part Ch1,Ch2,Ch3> Terminal FB Low voltage detection voltage VLVP 0.27 Terminal FB Low voltage detection Maximum hysteresis error Terminal FB Overvoltage detection voltage VLVP_HYS VOVP < Over current detection part Ch1,Ch2,Ch3> Terminal LX input bias current ILXB Terminal OCP input bias current IOCPB < Reset detection part > Terminal MONVCC reset detection voltage VRSTO Terminal MONVCC input bias current IMONVCCB Terminal RSTDLY charging current IRSTDLY Terminal RESET L output voltage VOL RST < Others> Terminal PDET L output voltage VOL RDET Terminal CTL input voltage H level voltage VIH CTL Terminal CTL input voltage L level voltage VIL CTL Terminal CTL input current II CTL Terminal DRV H output voltage VOH DRV Terminal DRV L output voltage VOL DRV VSS voltage (L→H) 0.32 0.37 V VFB voltage 10 100 200 mV VFB voltage 1.08 1.2 1.32 V VFB voltage -1 20 0 50 1 80 uA uA 0.98 -1 -15 - 1.0 -10 - 1.02 1 -5 0.4 V uA uA V 2.0 8.5 - 85 - 0.4 VCC 0.5 120 0.5 V V V uA V V VMONVCC voltage (H→L) IOL=100uA IOL=100uA Terminal CTL1,2,3 Terminal CTL1,2,3 Terminal CTL1,2,3, CTL=VCC Terminal DRV1A,2A,3A,1B,2B,3B Terminal DRV1A,2A,3A,1B,2B,3B VFB : FB terminal voltage, VFC : FC terminal voltage, VSS : SS terminal voltage, VMONVCC : MONVCC terminal voltage Not designed for radiation resistance. Current capability should not exceed Pd. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 2 / 15 2009.05 - Rev.A Technical Note BD8601FV ● Block diagram 22 21 PGND3 23 DRV3B 24 LX3 25 DRV3A 26 VIN3 27 OCP3 28 FB3 12 FC3 29 SS3 30 RT 31 GND 32 TEST1 33 TEST2 34 CTL1 35 CTL2 36 CTL3 37 VCC 38 RESET RSTDLY 39 MONVCC PDET 40 VRSTO OVP1.5 LVP0.4 VREF Delay Driver Control SYSTEM CONTROL SEQUENCER SS1 SS2 SS3 Driver Control Driver Control VREF OVP1.5 LVP0.4 OVP1.5 LVP0.4 VREF OSC 20 PGND2 19 DRV2B 18 LX2 17 DRV2A 16 VIN2 15 OCP2 14 FB2 13 FC2 11 SS2 10 GND 9 SS1 8 FC1 7 FB1 6 OCP1 5 VIN1 4 DRV1A 3 LX1 2 DRV1B PGND1 1 Figure 1 block char ● Terminal explanation Table 1 terminal explanation No. Symbol No. Symbol Description Ch1 power GND 1 PGND1 (same potential as GND terminal) 2 DRV1B Ch1 Nch drive output terminal 3 LX1 Ch1 overcurrent detection terminal 4 DRV1A Ch1 Pch drive output terminal 5 VIN1 Ch1 power supply input terminal Ch1 overcurrent detection level 6 OCP1 resistance connection terminal 7 FB1 Ch1 voltage detection terminal 8 FC1 Ch1 phase compensation terminal Ch1 soft start adjustment capacity 9 SS1 connection terminal 10 GND GND (0V connection) Frequency adjustment resistance 11 RT connection terminal Ch2 soft start adjustment capacity 12 SS2 connection terminal 13 FC2 Ch2 phase compensation terminal 14 FB2 Ch2 voltage detection terminal Ch2 overcurrent detection level resistance 15 OCP2 connection terminal 16 VIN2 Ch2 power supply input terminal 17 DRV2A Ch2 Pch drive output terminal 18 LX2 Ch2 overcurrent detection terminal 19 DRV2B Ch2 Nch drive output terminal Ch2 power GND 20 PGND2 (same potential as terminal GND) www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 40 PDET Description Off latch signal output 39 MONVCC VCC monitor terminal Reset delay adjustment capacity 38 RSTDLY connection terminal 37 RESET Reset output terminal 36 VCC Power supply input terminal 35 CTL3 Ch3 control terminal 34 33 CTL2 CTL1 Ch2 control terminal Ch1 control terminal 32 TEST2 Test terminal (connect to GND) 31 TEST1 Test terminal (Connect to GND) 30 29 28 27 26 25 24 23 22 21 3 / 15 GND GND (0V connection) Ch3 soft start adjustment capacity connection terminal FC3 Ch3 phase compensation terminal FB3 Ch3 voltage detection terminal Ch3 overcurrent detection level resistance OCP3 connection terminal VIN3 Ch3 power supply input terminal DRV3A Ch3 Pch drive output terminal LX3 Ch3 overcurrent detection terminal DRV3B Ch3 Nch drive output terminal Ch3 power GND PGND3 (same potential as terminal GND) SS3 2009.05 - Rev.A Technical Note BD8601FV ● Terminal equivalent circuit chart Terminal No. Terminal name 1 PGND1 Ch1 Power GND (GND Terminal and this potential) 20 PGND2 Ch2 Power GND (GND Terminal and this potential) 21 PGND3 Ch3 Power GND (GND Terminal and this potential) 2 DRV1B Ch1 Nch Driving output terminal 19 DRV2B Ch2 Nch Driving output terminal Explanation Terminal equivalent circuit chart VIN VIN ② ⑲ 22 22 DRV3B Ch3 Nch Driving output terminal PGND PGND VIN 3 LX1 VIN Ch1 Over current detection terminal VIN 18 LX2 Ch2 Over current detection terminal ③ ⑱ 23 23 LX3 Ch3 Over current detection terminal PGND VIN1 4 DRV1A Ch1 Pch Driving output terminal 17 DRV2A Ch2 Pch Driving output terminal VIN1 ④ ⑰ 24 24 DRV3A Ch3 Pch Driving output terminal PGND 5 VIN1 Ch1 Power supply input terminal 16 VIN2 Ch2 Power supply input terminal 25 VIN3 Ch3 Power supply input terminal www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 4 / 15 PGND 2009.05 - Rev.A Technical Note BD8601FV Terminal No. Terminal name Explanation Terminal equivalent circuit chart VCC 6 OCP1 VIN1 Ch1 Over current detection level Set resistance connection terminal ⑥ ⑮ 15 OCP2 26 Ch2 Over current detection level Set resistance connection terminal GND Ch3 Over current detection level Set resistance connection terminal 26 OCP3 7 FB1 Ch1 Voltage detection terminal 14 FB2 Ch2 Voltage detection terminal VCC ⑦ ⑭ 27 27 FB3 Ch3 Voltage detection terminal GND VCC 8 FC1 Ch1 Phase amends terminal ⑧ ⑬ 28 13 FC2 Ch2 Phase amends terminal 28 FC3 Ch3 Phase amends terminal www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 5 / 15 GND 2009.05 - Rev.A Technical Note BD8601FV Terminal No.. Terminal name 9 SS1 Ch1 Soft start Adjustment capacity connection terminal 12 SS2 Ch2 Soft start Adjustment capacity connection terminal 29 SS3 Ch3 Soft start Adjustment capacity connection terminal 10 GND GND （0V Connection) 30 GND GND （0V Connection) Explanation Terminal equivalent circuit chart VCC ⑨ ⑫ 29 GND VCC 11 RT Frequency adjustment resistance connection terminal ⑪ GND 31 TEST1 Test terminal VCC 32 TEST2 Test terminal 33 CTL1 Ch1 Control terminal 34 CTL2 Ch2 Control terminal 35 CTL3 Ch3 Control terminal www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 31 32 33 34 35 GND 6 / 15 2009.05 - Rev.A Technical Note BD8601FV Terminal No. Terminal name 36 VCC Explanation Terminal equivalent circuit chart Power supply input terminal VCC 37 RESET 37 Reset output terminal GND VCC 38 RSTDLY Reset Delay Adjustment capacity connection terminal 38 GND VCC 39 MONVCC 39 VCC Monitor terminal GND VCC 40 PDET 40 Off latch output terminal GND www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 7 / 15 2009.05 - Rev.A Technical Note BD8601FV ● Operation description ON/OFF control DC/DC converter controller ON/OFF function DC/DC converter controller of each Ch can be independently controlled ON/OFF by CTL1, CTL2, and CTL3 terminal. Analog circuit of Ch interlocked to each CTL terminal starts operation at ON control (on mode), and goes down to setting output voltage. Analog circuit of Ch interlocked to each CTL terminal should be standby at OFF control (off mode), and output voltage becomes 0V. Table2 DC/DC converter controller ON/OFF function CTL1 terminal voltage >VIHCTL1 <VILCTL1 Ch1 ON control OFF control CTL2 terminal voltage >VIHCTL2 <VILCTL2 Ch2 ON control OFF control CTL3 terminal voltage >VIHCTL3 <VILCTL3 Ch3 ON control OFF control Soft start time set function DC/DC converter controller of each Ch can do soft start without overshoot by charging soft start capacity (Css) connected between ss terminal and GND in each Ch by charging current at ON control. The mute of the output is released when it reaches VSS=0.15V (VSSSTB), and the output voltage does the soft start operation from the point of VSS=0.3V (typ) in proportion to the voltage of the terminal SS. Also, soft start time (tss) can be set by setting soft start capacity arbitrarily. Soft start time (tss) should be set at 3msec < tss < 30msec. t SS VSSTH CSS ISS Discharge function DC/DC converter controller of each Ch can do soft off by discharging load discharged to soft start capacity connected between SS terminal to GND by discharging resistance at OFF control. Soft off operates in proportion to the voltage of the terminal SS the output voltage from the point of VSS=0.8V (typ). Figure 2 Wave form at ON/OFF control www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 8 / 15 2009.05 - Rev.A Technical Note BD8601FV OSC oscillation frequency setting function DRVA and DRVB output oscillation frequency of DC/DC converter controller of each Ch can be set by installing resistance between RT terminal and GND externally. Switching frequency[KHz] 10000 1000 100 10 1 10 100 RT terminal resistance[KΩ] 1000 *reference data Figure 3 Terminal RT resistance-oscillation frequency Off latch signal output function PDET terminal outputs condition of off latch when protection operation of DC/DC converter controller of each Ch operates. Table 3 PDET terminal off latch signal output function Protection operation Terminal PDET ON LOW OFF Hi-Z www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 9 / 15 2009.05 - Rev.A Technical Note BD8601FV Reset output function Reset output function observes voltage value from MONVCC terminal and does reset operation compared to internal reference level. Set MONVCC terminal external resistance to make VCC voltage more than 5.0V at reset release. Table 4 DC/DC converter controller ON/OFF function MONVCC terminal voltage RESET terminal <1.0V(typ) LOW >1.072V(typ) Hi-Z Delay time until detecting reset release is settable by capacitor connected to RSTDLY terminal. TRSTDLY 1.235V CRSTDLY IRSTDLY VCC α(VRSTO+VRSTO_HYS) (α= R1+R2 R2 α・VRSTO ) R1 MONVCC VCC R2 VRSTO (1.0V) Power supply in reset input side 0 RESET IRSTDLY Hi Z RESET Low TRSTDLY 1.235V CRSTDLY TRSTDLY : Delay time until detecting reset release Figure 4 reset operation www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 10 / 15 2009.05 - Rev.A Technical Note BD8601FV ● Protection function Protection circuit is effective for destruction prevention due to accident so that avoid using by continuous protection operation. Low voltage protection function(LVP) Low voltage protection function detects output voltage VO set in each Ch from FB terminal of each Ch and off-latched all DC/DC converter controller compared to internal reference level. Low voltage protection function operates when FB terminal voltage falls below VLVP (=1.5 x VREF) and continues about more than 400μsec (typ). Table 5 Low voltage protection function CTL Low voltage Low voltage SS terminal FB terminal terminal protection function protection operation <VLVP ON >1.1V(typ) Enable >VIHCTL >VLVP+VLVP_HYS OFF <1.0V(typ) Disable OFF <VILCTL Disable OFF *Constant voltage protection function is enabled when SS terminal voltage of each Ch becomes more than 1.1V (typ) in the transition to ON control (during soft start). Overvoltage protection function(OVP) Overvoltage protection function detects output voltage VO set in each Ch from FB terminal of each Ch and off-latched all DC/DC converter controller compared to internal reference level. Overvoltage protection function operates when FB terminal voltage exceeds VOVP (=1.5 x VREF) and continues about more than 400μsec (typ). Table 6 Overvoltage protection function CTL Overvoltage Overvoltage SS terminal FB terminal terminal protection function protection operation >VOVP ON >1.1V(typ) Effective >VIHCTL <VOVP OFF <1.0V(typ) Invalidity OFF <VILCTL Invalidity OFF *Overvoltage protection function is enabled when SS terminal voltage of each Ch becomes more than 1.1V (typ) in the transition to ON control (during soft start). www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 11 / 15 2009.05 - Rev.A Technical Note BD8601FV Overcurrent protection function(OCP) Overcurrent protection function compared drain voltage (LX terminal voltage) with OCP terminal voltage when external Pch POWER MOS is ON. When LX terminal voltage becomes lower than OCP terminal voltage, external MOS would be OFF. Up to 50uA (typ) of constant current from OCP terminal is synchronized. Overcurrent detection level (OCP terminal voltage) can be set arbitrarily by external resistance value. Off latch by overcurrent protection function operates when LX terminal voltage falls below OCP terminal voltage and continues about more than 400μsec (typ). Table 7 overcurrent protection function CTL LX terminal Overcurrent SS terminal terminal voltage protection function <VOCP >1.1V(typ) Enable >VIHCTL >VOCP <1.0V(typ) Disable <VILCTL Disable *Set OCP terminal voltage to be more than VIN-2.5V (typ). Overcurrent protection operation ON OFF OFF OFF DRVA DRVB Output current Rocp LX OCP Figure 5. Overcurrent protection www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 12 / 15 2009.05 - Rev.A Technical Note BD8601FV Terminal FC abnormality protection function FCHP=1.95V(typ) 1.5V(typ) Internal triangular wave FC 0.9V(typ) FCLP=0.62V(typ) About 400usec(typ) continuance and an off latch. About 400usec(typ) Off latch The terminal FC abnormality protection function Ofrattis it all DC/DC converter controller detecting the continuance of the state that FC which is the difference input of PWMCOMP does not intersect with an internal triangular wave. The terminal FC abnormality protection function is exceeded 1.95V(typ) by the voltage of the terminal FC or operates when it falls below 0.62V(typ), and about 400usec(typ) or more continues. CTL terminal SS terminal Protection operation FC terminal Terminal FC abnormality protection operation > 1.95V(typ) ON 0.62V(typ) < , < 1.95V(typ) OFF < 1.0V(typ) < 0.62V(typ) ON Disable < VIHCTL OFF *Terminal FC abnormality protection function is enabled when SS terminal voltage of each Ch becomes more than 1.1V (typ) in the > VIHCTL > 1.1V(typ) Enable transition to ON control (during soft start). RT terminal open/short protection function RT terminal open/shot protection function off-latches all DC/DC converter controller by detecting open/short condition internally from RT terminal to prevent from output voltage error caused by abnormal oscillation of internal triangular wave at RT terminal open/short. RT terminal open/short protection function is regularly enabled after boot-up. RT terminal open/short protection function operates when error detection condition continues about more than 400μsec (typ). www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 13 / 15 2009.05 - Rev.A Technical Note BD8601FV Soft start time-out function Each Ch DC/DC converter controller off-latch-controls when VSS does not exceed VSSPON from VSS > VSSSTB+VSSSTB_HYS after 50msec (typ) passed from soft start. Figure 6. At soft start time-out Error detection (off latch) release method Each Ch DC/DC converter controller comes into off latch condition when protection function operates. Off latch can be released by the following method. Each Ch DC/DC converter controller becomes able to do ON control transition by releasing off latch. 1. Set all Ch CTL terminal voltage as < VILCTL and continue that condition about more than 200usec (typ). 2. Drop down power supply VCC to below 4.5V. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 14 / 15 2009.05 - Rev.A BD8601FV Technical Note ●Ordering part number B D 8 Part No. 6 0 1 F Part No. P - E Package FP: SSOP-B40 2 Packaging and forming specification E2: Embossed tape and reel SSOP-B40 <Dimension> <Tape and Reel information> 13.6 ± 0.2 21 1 20 Quantity 2000pcs Direction of feed E2 0.3Min. (The direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand) 0.15 ± 0.1 15 / 15 1234 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 1234 （Unit:mm) 1pin 1234 Reel 1234 0.08 M 1234 0.22 ± 0.1 1234 0.1 0.65 1234 0.1 Embossed carrier tape 1234 1.8 ± 0.1 7.8 ± 0.3 5.4 ± 0.2 40 Tape Direction of feed *When you order , please order in times the amount of package quantity. 2009.05 - Rev.A Notice 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 Products. 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, communication 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. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System http://www.rohm.com/contact/ www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. R0039A