BD8601FV

System Power Supply for TV Series FET Controller Type 3ch System Power Supply ICs 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) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 3ch synchronous rectification step-down system DC/DC converter controller 3ch independent ON/OFF. controllable Soft start, soft off function Concentrated protection control with built-in sequencer Built-in low voltage protection function Built-in overvoltage protection function Built-in overcurrent protection function Built-in RT terminal open/short protection function Built-in duty clamp (90% ON) function Frequency setting by external resistance is available. Protection condition is output from PDET terminal. Built-in external reset output function No.09034EAT01 www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 1 / 15 2009.05 - Rev.A 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 Technical Note Symbol specification value MIN TYP MAX UNIT Condition IQ1 IQ2 VREF IFBB VFCH VFCL IFCSINK IFCSOURCE AVERR FOSC FONDUTY ISS VSSTH VSSCLM VSSSTB VSSSTB_HYS RSS VSSPON VSSPON_HYS 0.792 -1 1.8 0.5 100 70 -4.0 1.0 1.6 0.11 5 49 1.0 10 3.5 7 0.8 100 85 -2.5 1.1 1.9 0.15 50 70 1.1 100 0.32 100 1.2 0 50 1.0 -10 85 - 8 15 0.808 1 0.2 -70 600 95 -1.0 1.2 2.2 0.19 100 91 1.2 200 0.37 200 1.32 1 80 1.02 1 -5 0.4 0.4 VCC 0.5 120 0.5 mA mA V μA V V mA μA dB kHz % μA V V V mV kΩ V mV V mV V uA uA V uA uA V V V V uA V V CTL1,2,3=0V CTL1,2,3=VCC Terminal FB and FC terminal short < 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 Oscillation frequency < Duty clamping part Ch1,Ch2,Ch3> Max ON duty ratio VFB=0.7V VSS=1.0V VSS voltage, VFC=0.8V VSS voltage (L→H) < 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 VSS voltage (L→H) VSS voltage VFB voltage VFB voltage VFB voltage < 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 10 1.08 -1 20 0.98 -1 -15 2.0 8.5 - 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 Not designed for radiation resistance. 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 Current capability should not exceed Pd. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 2 / 15 2009.05 - Rev.A BD8601FV Technical Note ● Block diagram MONVCC RSTDLY PGND3 RESET DRV3A DRV3B TEST2 TEST1 OCP3 PDET PGND1 CTL3 CTL2 CTL1 GND VIN3 VCC SS3 FC3 FB3 LX3 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 VRSTO Delay OVP1.5 LVP0.4 VREF SYSTEM CONTROL SEQUENCER Driver Control SS1 SS2 SS3 Driver Control OVP1.5 LVP0.4 OVP1.5 LVP0.4 VREF VREF OSC Driver Control 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 LX1 GND VIN2 LX2 ● Terminal explanation No. Symbol Description Ch1 power GND 1 PGND1 (same potential as GND terminal) 2 DRV1B Ch1 Nch drive output terminal 3 LX1 Table 1 terminal explanation No. Symbol 40 PDET Description Off latch signal output 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) DRV1B VIN1 FC1 SS1 RT FB2 OCP2 OCP1 SS2 DRV1A FB1 FC2 DRV2A DRV2B PGND2 Figure 1 block char 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 34 33 32 31 30 29 28 27 26 25 24 23 22 21 CTL3 CTL2 CTL1 Ch3 control terminal Ch2 control terminal Ch1 control terminal TEST2 Test terminal (connect to GND) TEST1 Test terminal (Connect to GND) GND SS3 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) www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 3 / 15 2009.05 - Rev.A BD8601FV Technical Note ● Terminal equivalent circuit chart Terminal No. 1 20 21 Terminal name PGND1 PGND2 PGND3 Explanation Ch1 Power GND (GND Terminal and this potential) Ch2 Power GND (GND Terminal and this potential) Ch3 Power GND (GND Terminal and this potential) Terminal equivalent circuit chart 2 DRV1B Ch1 Nch Driving output terminal VIN VIN 19 DRV2B Ch2 Nch Driving output terminal ② ⑲ 22 22 DRV3B Ch3 Nch Driving output terminal PGND PGND VIN VIN 3 LX1 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 VIN1 17 DRV2A Ch2 Pch Driving output terminal ④ ⑰ 24 24 DRV3A Ch3 Pch Driving output terminal PGND 5 VIN1 Ch1 Power supply input terminal PGND 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 2009.05 - Rev.A BD8601FV Technical Note Terminal No. Terminal name Explanation Terminal equivalent circuit chart VCC 6 OCP1 Ch1 Over current detection level Set resistance connection terminal VIN1 ⑥ ⑮ 15 OCP2 Ch2 Over current detection level Set resistance connection terminal 26 GND 26 OCP3 Ch3 Over current detection level Set resistance connection terminal 7 FB1 Ch1 Voltage detection terminal VCC 14 FB2 Ch2 Voltage detection terminal 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 GND 28 FC3 Ch3 Phase amends terminal www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 5 / 15 2009.05 - Rev.A BD8601FV Technical Note Terminal No.. Terminal name Explanation Terminal equivalent circuit chart 9 SS1 Ch1 Soft start Adjustment capacity connection terminal VCC 12 SS2 Ch2 Soft start Adjustment capacity connection terminal ⑨ ⑫ 29 29 SS3 Ch3 Soft start Adjustment capacity connection terminal GND 10 30 GND GND GND （0V Connection) GND （0V Connection) VCC 11 RT Frequency adjustment resistance connection terminal ⑪ GND 31 TEST1 Test terminal VCC 32 TEST2 Test terminal 31 32 33 34 35 33 CTL1 Ch1 Control terminal 34 CTL2 Ch2 Control terminal 35 CTL3 Ch3 Control terminal GND www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 6 / 15 2009.05 - Rev.A BD8601FV Technical Note Terminal No. 36 Terminal name VCC Explanation Terminal equivalent circuit chart Power supply input terminal VCC 37 RESET Reset output terminal 37 GND VCC 38 RSTDLY Reset Delay Adjustment capacity connection terminal 38 GND VCC 39 MONVCC VCC Monitor terminal 39 GND VCC 40 PDET Off latch output terminal 40 GND www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 7 / 15 2009.05 - Rev.A BD8601FV Technical Note ● 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 VIHCTL2 VIHCTL3 VIHCTL >VLVP+VLVP_HYS OFF 1.1V(typ) Effective >VIHCTL 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 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 BD8601FV Technical Note 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 ●Ordering part number Technical Note B Part No. D 8 Part No. 6 0 1 F P - E 2 Package FP: SSOP-B40 Packaging and forming specification E2: Embossed tape and reel SSOP-B40 Tape Quantity 13.6 ± 0.2 40 21 Embossed carrier tape 2000pcs E2 (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) 7.8 ± 0.3 5.4 ± 0.2 Direction of feed 0.3Min. 1 20 1.8 ± 0.1 0.15 ± 0.1 0.1 0.1 1234 1234 1234 1234 1234 1234 1234 1234 0.65 0.22 ± 0.1 0.08 M Reel 1pin Direction of feed （Unit:mm) *When you order , please order in times the amount of package quantity. www.rohm.com © 2009 ROHM Co., Ltd. All rights reserved. 15 / 15 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. 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