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product structure silicon monolithic integrated circuit this product has no designed protection against radioactive rays 1/ 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. tsz22111 ? 14 ? 001 www.rohm.com 16.dec.2015 rev.001 sound processor with built - in 2 - band equalizer b d37512fs general description BD37512FS is a sound processor with built - in 2 - band equalizer for car audio. the functions are 4ch stereo input selector, i nput - gain control, main volume and 4ch fader volume. moreover, its advanced switch circuit, which is an original rohm technology, can reduce various switching noise (ex. no - signal, low frequency like 20hz & large signal inputs). advanced switch makes control of microcomputer easier, supporting the constr uct ion of a high quality car audio system. features ? reduce switching noise of mute, main volume, fader volume, bass, trebles by using advanced switch circuit ? built - in 1 differential input selector and 3 single - ended input selectors . ? built - in ground isol ation amplifier inputs, ideal for external stereo input. ? d ecrease the number of external components due to built - in 2 - band equalizer filter. ? it is possible to adjust the gain of the bass and treble up to 20db with 1 db step gain adjustment. ? energy - saving design resulting in l ow current consumption, by utilizing the bi - cmos process . it has the advantage in quality over scaling down the power heat control of the internal regulators. ? input terminals and output terminals are organized and separately laid out to keep the signal flow in one direction which results in simpler and smaller pcb layout. ? it is possible to control the i 2 c bus by 3.3v / 5v. applications it is optimal for use in car audio systems. it can also be used for audio equipment of mini compo, micro compo, tv, etc. key specifications ? power supply voltage range : 7.0v to 9.5v ? circuit current ( no signal ): 1 5ma ( typ ) ? total harmonic distortion : 0.00 5 % ( typ ) ? maximum input voltage : 2.3vrms ( typ ) ? cross - talk between selectors : -100 db ( typ ) ? volume control range : +0db to - 40db ? output noise voltage : 6 vrms ( typ ) ? residual output noise voltage : 2 vrms ( typ ) ? operating temperature range : -40c to +85 c package w (typ) x d(typ) x h(max) ssop - a20 8.70mm x 7.80 mm x 2.01mm datashee t datashee t
BD37512FS 2 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 typical application circuit pin configuration pin description s pin no. pin name description pin no. pin name description 1 a1 a input terminal of 1ch 11 outr2 rear output terminal of 2ch 2 a2 a input te rminal of 2ch 12 outr1 rear output terminal of 1ch 3 b1 b input terminal of 1ch 13 outf2 front output terminal of 2ch 4 b2 b input terminal of 2ch 14 outf1 front output terminal of 1ch 5 c1 c input terminal of 1ch 15 vcc power supply terminal 6 c2 c in put terminal of 2ch 16 mute external compulsory mute terminal 7 dp1 d positive input terminal of 1ch 17 scl i 2 c communication clock terminal 8 dn d negative input terminal 18 sda i 2 c communication data terminal 9 dp2 d positive input terminal of 2ch 19 gnd gnd terminal 10 n.c. no connection 20 fil vcc/2 terminal BD37512FS top view a1 1 a2 2 b1 3 b2 4 c1 5 c2 6 dp 1 7 dn 8 dp2 9 n.c 10 11 outr2 12 outr1 13 outf2 14 outf1 15 vcc 16 mute 17 scl 18 sda 19 gnd 20 fil
BD37512FS 3 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 block diagram fader: 0d b to - 62 db/1db - 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 fader : 0 db - 62 b / 1 db - no pop noise et 2 band eq ( tone control ) gain + 20 db - 20 db / 1 db volume 0 db - 40 db / 1 db step gnd iso amp input selector ( 3 single - end and 1 stereo iso ) i 2 c bus logic gnd no pop noise ? bass f 0 = 100 hz q = 1 . 0 ? treble f 0 = 10 khz q = 1 input gain + 20 db 0 db / 1 db step 100 k vcc / 2 100 k 100 k 100 k 50 k 50 k gnd iso amp 50 k 100 k 100 k volume / mute 2 band p - eq ( tone control ) input gain f a d e r f a d e r f a d e r f a d e r vcc
BD37512FS 4 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 absolute maximum ratings (ta=25 c ) parameter symbol rating unit power supply voltage v cc 10.0 v input voltage v in v cc +0.3 t o gnd - 0.3 v power dissipation pd 0.94 (note) w storage temperature tstg - 55 to +150 c (note) this value derates by 7.5mw/ c for ta=25 c or more when rohm standard board is used. 7khupdouhvlvwdqfhmd .3 ( c /w) rohm standard board size : 70 x 70 x 1.6( mm 3 ) material : a fr4 grass epoxy board(3% or less of copper foil area) caution : operating the ic over the absolute maximum ratings may damage the ic. the damage can either be a short circuit between pins or an open circuit between pins and the interna l circuitry. therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the ic is ope rated over the absolute maximum ratings . recommended op erating condition s parameter symbol min typ max unit power supply voltage v cc 7.0 - 9.5 v temperature topr - 40 - +85 c electrical characteristics (unless specified otherwise , ta=25 c , v cc =8.5v, f=1khz, v in 9upv 5j 5 l n $ lqsxw ,qsxw jdlq g% mute off , volume 0db, tone control 0db, loudness 0db, fader 0db) bloc k parameter symbol limit unit conditions min typ max general circuit current i q
BD37512FS 5 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 electrical characteristics - continued block paramete r symbol limit unit conditions min typ max mute mute attenuation
BD37512FS 6 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 typical performance curves quiescent current : i q [ma] supply voltage : v c c [v] 10khz 1khz 100hz total harmonic distortion : thd+n [%] output voltage : v out [vrms] fig ure 1 . quiescent current vs supply voltage fig ure 2 . total harmonic distortion vs output voltage gain=0db vol tage gain : g v [db ] frequency : f [hz] fig ure 3 . voltage gain vs frequency fig ure 4 . bass voltage gain vs frequency bass gain : - 20db to +20db /1db step fo : 100hz q : 1 bass voltage gain : g v [db] frequency : f [hz] 0 5 10 15 20 25 30 0 2 4 6 8 10 -25 -20 -15 -10 -5 0 5 10 15 20 25 10 100 1k 10k 100k -5 -4 -3 -2 -1 0 1 2 3 4 5 10 100 1k 10k 100k 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10
BD37512FS 7 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 typical performance curves - continued fig ure 5 . treble voltage gain vs frequency common mode rejection ratio : cmrr [db] frequency : f [hz] fig ure 6 . common mode rejection ratio vs frequency fig ure 8 . ripple rejection ratio vs frequency treble gain : - 20db to +20db /1db step fo : 10khz q : 1 treble voltage gain : gv [db] frequency : f [hz ] ripple rejection : rr [db] frequency : f [hz] fig ure 7 . cross - talk between channel s vs freq uency cross - talk between channels : ctc [db] frequency : f [hz] -100 -80 -60 -40 -20 0 10 100 1k 10k 100k -120 -100 -80 -60 -40 -20 0 10 100 1k 10k 100k -25 -20 -15 -10 -5 0 5 10 15 20 25 10 100 1k 10k 100k -100 -80 -60 -40 -20 0 10 100 1k 10k 100k
BD37512FS 8 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 typical performance curves - continued fig ure 9 . output noise vs volume attenuation output noise : v no [ vrms] bass voltage gain : gv [db] fig ure 1 0 . output noise vs bass voltage gain fig ure 11 . output noise vs treble voltage gain fig ure 12 . output noise vs fader voltage gain din - audio ihf - a output noise : v no [ vrms] volume attenuation : att [db] output noise : v no >9upv ] treble voltage gain :gv [db] output noise : v no >9upv@ fader voltage gain : gv [db] din - audio ihf - a din - audio ihf - a din - audio ihf - a 1 10 100 -40 -30 -20 -10 0 10 1 10 100 -20 -15 -10 -5 0 5 10 15 20 1 10 100 -20 -15 -10 -5 0 5 10 15 20 1 10 100 -80 -70 -60 -50 -40 -30 -20 -10 0
BD37512FS 9 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 typical performance curves - continued maximum output vo ltage : v o ut [vrm s] load resistance : r l > ] fig ure 13 . maximum output voltage vs load resistance ou tf1 outf2 fig ure 14 . advanced switch 1 outf1 outf2 fig ure 15 . advanced switch 2 0.0 0.5 1.0 1.5 2.0 2.5 100 1000 10000 100000
BD37512FS 10 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 timing chart control signal specification (1) electrical specifications and timing for bus lines and i/o stages figure 16 . i 2 c - bus signal timing diagram table 1 characteristics of the sda and scl bus lines for i 2 c - bus devices parameter symbol fast - m ode i 2 c - bus unit min max 1 scl clock frequency f scl 0 400 khz 2 bus free time between a stop and start condition t buf 1.3 buf 4 us hd ; sta 2 us hd ; dat 1 us low 3 us high 1 us su ; dat 1 us su ; sto 2 us scl clock frequency 250 khz scl sda sda s scl t low t r t hd;dat p t hd;sta t high t buf t f t su;dat t su;stat t su;stot t sp t hd;stat sr p
BD37512FS 11 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 (2) i 2 c bus format msb lsb msb lsb msb lsb s slave address a select address a data a p 1bit 8bit 1bit 8bit 1bit 8bit 1bit 1bit s = start condition (recognition of start bit) slave address = recognition of slave address. the first 7 bits correspond to the slave address . the least significant bit is 3 l which corresponds to write mode . a = acknowledge bit (recognition of acknowledgement) select address = select address corresponding to volume, bass or treble. data = data on every volume and tone. p = stop condition (recognition of stop bit) (3) i 2 c bus interface protocol (a) basic form at s slav e address a select address a data a p msb lsb msb lsb msb lsb (b) automatic increment (select address increases (+1) according to the number of data.) s slave address a select address a data1 a data2 a ???? msb lsb msb lsb msb lsb msb lsb (example) q data1 shall be set as data of address specified by select address. r data2 shall be set as data of address specified by select address +1. s datan shall be set as data of add ress specified by select address +n - 1. (c) configuration unavailable for transmission (in this case, only select address1 is set.) s slave address a select address1 a data a select address 2 a data a p msb lsb msb lsb msb lsb msb lsb msb lsb ( note ) if any data is transmitted as select address 2 next to data, it is recognized as data, not as select address 2. (4) slave address msb lsb a6 a5 a4 a3 a2 a1 a0 r/w 1 0 0 0 0 0 0 0 80h
BD37512FS 12 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 (5) select address & data items select address (hex) msb data lsb d7 d6 d5 d4 d3 d2 d1 d0 initial setup 1 01 advance d switch on/off 0 advanced switch time of volume/tone/fader 0 0 advanced switch ti me of mute input selector 04 0 0 0 0 0 input selector input gain 06 mute on/off 0 0 input gain volume gain 20 1 0 volume attenuation fader 1ch front 28 1 0 fader attenuation fader 2ch front 29 1 0 fader attenuation fader 1ch rear 2a 1 0 fader attenua tion fader 2ch rear 2b 1 0 fader attenuation bass gain 51 bass boost/ cut 0 0 bass gain treble gain 57 treble boost/ cut 0 0 treble gain system reset fe 1 0 0 0 0 0 0 1 advanced switch note 1. the advanced switch works in the latch part while changin g from one function to another. 2. w hen changing a tone into the cut from the boost, or the cut and the boost, always go via the condition of the tone 0db. 3. u pon continuous data transfer, the select address rolls over because of the automatic increment funct ion, as shown below. 4. f or the function of i nput s elector etc, a dvanced s witch is not used . therefore, please apply mute on the set side when chang ing these setting s . 5. w hen using mute function of this ic at the time of changing input selector, please s witch mute on/off while waiting for advanced - mute time. 01 04 06 20 28 29 2a 2b 51 57
BD37512FS 13 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 select address 01 (hex) mode msb advanced switch time of mute lsb d7 d6 d5 d4 d3 d2 d1 d0 0.6msec advanced switch on/off 0 advanced switch time of volume/tone/fader 0 0 0 0 1.2msec 0 1 2. 4msec 1 0 4.8msec 1 1 mode msb advanced switch time of volume/tone/fader lsb d7 d6 d5 d4 d3 d2 d1 d0 4.6 msec advanced switch on/off 0 0 0 0 0 advanced switch time of mute 9.3 msec 0 1 18.6 msec 1 0 37.2 msec 1 1 mode m sb advanced switch on/off l sb d7 d6 d5 d4 d3 d2 d1 d0 off 0 0 advanced switch time of volume/tone/fader 0 0 advanced switch time of mute on 1 select address 04(hex) mode msb input select or lsb d7 d6 d5 d4 d3 d2 d1 d0 a 0 0 0 0 0 0 0 0 b 0 0 1 c 0 1 0 d 1 0 0 short 1 0 1 input mute 1 1 0 1 1 1 : initial condition short : 7khlqsxwlpshgdqfhrihdfklqsxwwhuplqdolvorzhuhgiurpn 7<3wrn 7<3 (for quick charge of coupling capacitor) input mute : mute is done at the input signal part of input selector.
BD37512FS 14 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 select address 06 (hex) gain msb input gain lsb d7 d 6 d5 d4 d3 d2 d1 d0 0db mute on/off 0 0 0 0 0 0 0 1db 0 0 0 0 1 2db 0 0 0 1 0 3db 0 0 0 1 1 4db 0 0 1 0 0 5db 0 0 1 0 1 6db 0 0 1 1 0 7db 0 0 1 1 1 8db 0 1 0 0 0 9db 0 1 0 0 1 10db 0 1 0 1 0 11db 0 1 0 1 1 12db 0 1 1 0 0 13db 0 1 1 0 1 14db 0 1 1 1 0 15db 0 1 1 1 1 16db 1 0 0 0 0 17db 1 0 0 0 1 18db 1 0 0 1 0 19db 1 0 0 1 1 20db 1 0 1 0 0 prohibition 1 1 0 1 1
BD37512FS 15 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 select address 20 (hex) gain & att msb vol attenuation lsb d7 d6 d5 d4 d3 d2 d1 d0 0db 1 0 0 0 0 0 0 0 - 1db 0 0 0 0 0 1 - 2db 0 0 0 0 1 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
BD37512FS 16 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 select address 51, 57 (hex) gain msb bass/treble gain lsb d7 d6 d5 d4 d3 d2 d1 d0 0db bass/ treble boost /cut 0 0 0 0 0 0 0 1db 0 0 0 0 1 2db 0 0 0 1 0 3db 0 0 0 1 1 4db 0 0 1 0 0 5db 0 0 1 0 1 6db 0 0 1 1 0 7db 0 0 1 1 1 8db 0 1 0 0 0 9db 0 1 0 0 1 10db 0 1 0 1 0 11db 0 1 0 1 1 12db 0 1 1 0 0 13db 0 1 1 0 1 14db 0 1 1 1 0 15db 0 1 1 1 1 16db 1 0 0 0 0 17db 1 0 0 0 1 18db 1 0 0 1 0 19db 1 0 0 1 1 20db 1 0 1 0 0 prohibition 1 0 1 0 1
BD37512FS 17 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 application information 1. function and specifications function specifications input selector ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
BD37512FS 18 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 3. application circuit unit 5> @ c : [f] fader: 0 db to - 62 db/1db - vcc mute fil 10 0 . 1 10 outr 2 outr 1 outf 2 outf 1 single 1 single 2 single 3 diff 1 gnd sda scl 10 10 10 2 . 2 2 . 2 2 . 2 2 . 2 2 . 2 2 . 2 2 . 2 10 2 . 2 10 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 fader : 0 db - 62 b / 1 db - no pop noise et 2 band eq ( tone control ) gain + 20 db - 20 db / 1 db volume 0 db - 40 db / 1 db step gnd iso amp input selector ( 3 single - end and 1 stereo iso ) i 2 c bus logic gnd no pop noise ? bass f 0 = 100 hz q = 1 . 0 ? treble f 0 = 10 khz q = 1 input gain + 20 db 0 db / 1 db step 100 k vcc / 2 100 k 100 k 100 k 50 k 50 k gnd iso amp 50 k 100 k 100 k volume / mute 2 band p - eq ( tone control ) input gain f a d e r f a d e r f a d e r f a d e r vcc
BD37512FS 19 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 power dissipation about the t hermal design of the ic characteristics of an ic have a great deal to do with the temperature at which it is used, and exceeding absolute maximum ratings may degrade and destroy the device . careful consideration must be given to the heat of the ic from the two standpoints of immediate damage and long - term reliability of operation. figure 18 . tem perature derating curve power dissipation values vary according to the board on which the ic is mounted. (note) values are actual measurements and are not guaranteed. reference data ssop - a20 1.5 1.0 0.5 0.0 0 25 50 75 100 125 150 ambient te mperature : ta (c) p ower dissipation : pd ( w ) 0.94w md 3 . 3 c /w 85 measurement condition: rohm standard board board size : 70 x 70 x 1.6(mm 3 ) material : a fr4 grass epoxy board (3% or less of copper foil area)
BD37512FS 20 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 i/o equivalen t circuit s terminal no. terminal name terminal voltage equivalent circuit terminal description 1 2 3 4 5 6 a1 a2 b1 b2 c1 c2 4.25 a terminal for signal input. 7khlqsxwlpshgdqfhlvn w\s 7 9 dp1 dp1 4.25 a terminal for positive input of ground isolation amplifier. 7khlqsxwlpshgdqfhlvn w\s 8 dn 4.25 a terminal for negative input of ground isolation amplifier. 7khlqsxwlpshgdqfhlvn w\ p). 16 mute - a terminal for external compulsory mute. if terminal voltage is high level, the mute is off. and if the terminal voltage is low level, the mute is on. 11 12 13 14 outr2 outr1 outf2 outf1 4.25 a terminal for fader and subwoofer output. values in the pin explanation and input/output equivalent circuit are reference values only and are not guaranteed . gnd vcc 100 k vcc gnd 1.65v v cc gnd 25k 25k vcc gnd v cc gnd 12.5k 12.5k
BD37512FS 21 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 i/o equivalence circuit s - contin ued terminal no. terminal name terminal voltage equivalent circuit terminal description 15 vcc 8.5 p ower supply terminal. 17 scl v cc gnd 1.65v v cc gnd 1.65v
BD37512FS 22 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 operational notes 1. reverse connection of power s upply connecting the power supply in reverse polarity can damage the ic. take precautions against reverse polarity when frqqhfwlqj wkh srzhu vxsso\ vxfk dv prxqwlqj dq h[whuqdo glrgh ehwzhhq wkh srzhu vxsso\ dqg wkh ,&?v srzhu supply pins. 2. power supply l ines design the pcb layout pattern to provide low impedance supply lines. separate the ground and supply lines of the digital and analog blocks to prevent noise in the ground and supply lines of the digital block from affecting the analog block. furthermor e, connect a capacitor to ground at all power supply pins. consider the effect of temperature and aging on the capacitance value when using electrolytic capacitors. 3. ground voltage ensure that no pins are at a voltage below that of the ground pin at any ti me, even during transient condition. 4. ground wiring pattern when using both small - signal and large - current ground traces, the two ground traces should be routed separately but connected to a single ground at the reference point of the application board to avoid fluctuations in the small - signal ground caused by large currents. also ensure that the ground traces of external components do not cause variations on the ground voltage. the ground lines must be as short and thick as possible to reduce line impedanc e. 5. thermal consideration should by any chance the power dissipation rating be exceeded the rise in temperature of the chip may result in deterioration of the properties of the chip. in case of exceeding this absolute maximum rating, increase the board siz e and copper area to prevent exceeding the pd rating. 6. recommended operating conditions these conditions represent a range within which the expected characteristics of the ic can be approximately obtained. the electrical characteristics are guaranteed unde r the conditions of each parameter. 7. inrush current when power is first supplied to the ic, it is possible that the internal logic may be unstable and inrush current may flow instantaneously due to the internal powering sequence and delays, especially if t he ic has more than one power supply. therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing of connections. 8. operation under strong electromagnetic field operating the ic in the presence of a strong electromagnetic field may cause the ic to malfunction. 9. testing on application boards when testing the ic on an application board, connecting a capacitor directly to a low - impedance output pin may subject the ic to stress. always discharge capacito uvfrpsohwho\diwhuhdfksurfhvvruvwhs7kh,&?vsrzhuvxsso\ should always be turned off completely before connecting or removing it from the test setup during the inspection process. to prevent damage from static discharge, ground the ic during assembl y and use similar precautions during transport and storage. 10. inter - pin short and mounting errors ensure that the direction and position are correct when mounting the ic on the pcb. incorrect mounting may result in damaging the ic. avoid nearby pins being s horted to each other especially to ground, power supply and output pin. inter - pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and unintentional solder bridge deposited in between pins during assem bly to name a few. 11. unused input pins input pins of an ic are often connected to the gate of a mos transistor. the gate has extremely high impedance and extremely low capacitance. if left unconnected, the electric field from the outside can easily charge i t. the small charge acquired in this way is enough to produce a significant effect on the conduction through the transistor and cause unexpected operation of the ic. so unless otherwise specified, unused input pins should be connected to the power supply o r ground line.
BD37512FS 23 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 operational notes C ? ? ? ? ? ? ? ? ? ? ? n n p + p n n p + p s u b s t r a t e g n d n p + n n p + n p p s u b s t r a t e g n d g n d p a r a s i t i c e l e m e n t s p i n a p i n a p i n b p i n b b c e p a r a s i t i c e l e m e n t s g n d p a r a s i t i c e l e m e n t s c b e t r a n s i s t o r ( n p n ) r e s i s t o r n r e g i o n c l o s e - b y p a r a s i t i c e l e m e n t s
BD37512FS 24 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 ordering informatio n b d 3 7 5 1 2 f s - e 2 part n umber package fs: ssop - a2 0 packaging and forming specification e2: embossed tape and reel marking diagram ssop - a20(top view) BD37512FS part number marking lot number 1pin mark
BD37512FS 25 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 physical dimension , tape and reel information package name ssop - a20 (unit : mm) pkg : ssop - a20 drawing no. : ex132 - 5001 (max 9.05 (include.burr))
BD37512FS 26 / 26 tsz02201 - 0c2c0e100420 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. www.rohm.com tsz22111 15 001 16.dec.2015 rev.001 revision history date revision changes 16.dec .2015 001 new release
datasheet d a t a s h e e t notice-pga-e rev.00 2 ? 2015 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufac tured for application in ordinary elec tronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electroni c appliances, amusement equipment, etc.). if you intend to use our products in devices requiring ex tremely high reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecra ft, nuclear power controllers, fuel c ontrollers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (?specific applications?), please consult with the rohm sale s representative in advance. unless otherwise agreed in writing by rohm in advance, ro hm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ro hm?s products for specific applications. (note1) medical equipment classification of the specific applications japan usa eu china class class class b class class class 2. rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe desi gn against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditio ns, as exemplified below. accordin gly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of an y rohm?s products under any special or extraordinary environments or conditions. if you intend to use our products under any special or extraordinary environments or conditions (as exemplified bel ow), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] use of our products in any types of liquid, incl uding water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products ar e exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (ev en if you use no-clean type fluxes, cleaning residue of flux is recommended); or washing our products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] use of the products in places subject to dew condensation 4. the products are not subjec t to radiation-proof design. 5. please verify and confirm characteristics of the final or mounted products in using the products. 6. in particular, if a transient load (a large amount of load applied in a short per iod of time, such as pulse. is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 7. de-rate power dissipation depending on ambient temperatur e. when used in sealed area, c onfirm that it is the use in the range that does not exceed t he maximum junction temperature. 8. confirm that operation temperat ure is within the specified range descr ibed in the product specification. 9. rohm shall not be in any way responsible or liable for fa ilure induced under deviant condi tion from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the resi due of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be us ed on a surface-mount products, the flow soldering method must be used on a through hole mount products. if the flow sol dering method is preferred on a surface-mount products, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification
datasheet d a t a s h e e t notice-pga-e rev.00 2 ? 2015 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, pl ease allow a sufficient margin c onsidering variations of the characteristics of the products and external components, including transient characteri stics, as well as static characteristics. 2. you agree that application notes, re ference designs, and associated data and in formation contained in this document are presented only as guidance for products use. theref ore, in case you use such information, you are solely responsible for it and you must exercise your own indepen dent verification and judgment in the use of such information contained in this document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution in your manufacturing process and storage so that voltage exceeding t he products maximum rating will not be applied to products. please take special care under dry condit ion (e.g. grounding of human body / equipment / solder iron, isolation from charged objects, se tting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriora te if the products are stor ed in the places where: [a] the products are exposed to sea winds or corros ive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to di rect sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the co rrect direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. use products within the specified time after opening a hum idity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage time period. precaution for product label qr code printed on rohm products label is for rohm?s internal use only. precaution for disposition when disposing products please dispose them proper ly using an authorized industry waste company. precaution for foreign exchange and foreign trade act since concerned goods might be fallen under listed items of export control prescribed by foreign exchange and foreign trade act, please consult with rohm in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to application example contain ed in this document is for reference only. rohm does not warrant that foregoi ng information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. 2. rohm shall not have any obligations where the claims, actions or demands arising from the co mbination of the products with other articles such as components, circui ts, systems or external equipment (including software). 3. no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the products or the informati on contained in this document. pr ovided, however, that rohm will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to manufacture or sell products containing the produc ts, subject to the terms and conditions herein. other precaution 1. this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any wa y whatsoever the products and the related technical information contained in the products or this document for any military purposes, incl uding but not limited to, the development of mass-destruction weapons. 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties.
datasheet datasheet notice ? we rev.001 ? 2015 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information.
datasheet part number BD37512FS package ssop-a20 unit quantity 2000 minimum package quantity 2000 packing type taping constitution materials list inquiry rohs yes BD37512FS - web page distribution inventory

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