M5T494 MITSUBISHI | Alldatasheet
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Technical content
MITSUBISHI <ANALOG ASSP> MST494P, FP, GP SWITCHING REGULATOR CONTROL
DESCRIPTION
The M5T494 is a monolithic IC designed for a pulse-width- PIN CONFIGURATION (TOP VIEW) modulation control circuit. It contains all functions necessary to control single-ended vonnwemrn or Push-pull switching power supplies. It employs an on- invesTING Pur & Gy PB hows wear 8 chip 5-volt regulator, two error amplifiers, an adjustable oscil- INVESTING INPUT AG] INVERTING INeUT 6 lator, a dead-time control comparator, a pulse-steering flip- ameuirien ourpuT B] & fRPREFERENCE VOLTAGE flop, output-control circuitry and an undervoltage-lockout PEAD-TIME CONTROL} OUTPUT CONTROL (UVLO) function. TIMING CAPACITOR G] 3 1 Ve. The UVLO prevents irregular operation at the IC outputs TIMING RESISTOR Ey [RJCOLLECTOR 2 when the IC supply voltage is excessively low. cnoG] pjemrter 2 coutecron + Gf Blewirres > FEATURES ; © Undervoltage lockout (inhibits output for low Voc) Outline open? © Built-in 5-volt reference regulator 16P2S vtec eee eeeuesesss (Reference volrage 5V + 5%) ®@ Output contro! selectable for single-ended or push-pull operation. © Uncommitted outputs for 200-mA sink or source. APPLICATION Switching voltage regulators, Step-up step-down regulators, Voltage inversion regulators RECOMMENDED OPERATING CONDITIONS Supply voltage range 0.2... eevee ee eee T™4OV Timing capacitor, Cr... eo eevee ees A70PF ~ 3.3uF Timing resistor, Ry eo. so eevee eee ees 1,8 ~ 500K BLOCK DIAGRAM oureur EonTROL | as (13) OT | rine aesisron (6) loscit ator ‘ sone eaeseron 4 menearom tED-p @) COLLECTOR 1 EAD-TIME conrnon rt ‘> Ly Deqr nee: 01 - (9) couvector 2 | > Cede a ee ee NONINVERTING 1N@ a me OPS Eitlanaron INVERTING INPUT & NONINVERTING INPUT & x | - InveRTING inpur 8 (5) VOLTAGE KOuT Senemaror| | LOCKOU ennon GENERA cincutt : | AneciFieRs AMP. OUTPUT Vee REFERENCE GND vourace OOOO MITSUBISHI 6—166 re MES
MITSUBISHI <ANALOG ASSP> MST494P,FP,GP SWITCHING REGULATOR CONTROL ABSOLUTE MAXIMUM RATINGS (12=25°C, uness otnermise noted) a a [vo | otemwmnonme Pe Ee ee a a a CT [ Toor [ommiunee Pe [tsia [stor wrpertare ores | ELECTRICAL CHARACTERISTICS (Vcc = 15V. tose =40kHz, Ta= ~20~ + 70°C, uniess ormmermise noved ) hep pe] | Block vie | te | Mm Ver |) Outputvorage—~S*S*~*S*:«Ci mA, TTC [am] 5) 525 | aviet/ATa [eerste conten ouiouvoese] Tax —ao+ese.wet=—ima | | 9.01 | 0.03 | sere | Atte Freaecy coarse win ompmorue | T8=O = UE nae 21 4% i" es ee = uA Vara) CONTROL” Tip tareshoid voltage 7 Zero iy eves (each output ~~ Lethe Input threshold voltage 2 Maximum duty eyele feach outputl poo, SOUCY PT mane seen Pf ose MITSUBISHI oeites 6—167
MITSUBISHI <ANALOG ASSP> MST494P,FP,GP SWITCHING REGULATOR CONTROL
ELECTRICAL CHARACTERISTICS
symbol section | Parameter Test conditions Unit | ve ve teu Emitter leak current Voo=Ve=40V, Ve=0 (Emitter folioweri| —100 | ~0.01 ua Voeon_ | Qutbut saturation varage ie=—200mA, Vo=15V zs] ov on a a th OUTPUT | Ouinutvotrage nse time Voo=15V,Ri=1502, lo=100mA, | | 80 | 200 | ns tH Outout-voitage fil time Ta=25'C (Common-emitter) 30 | 100 | ns te Ourput-voltage rise time Voo=Vo=15V, Ru=1509, le = 200 | 400 te ‘Ourpur-voltage fall time =100MA, Ta=25°C (Emitter follower) xo | 100 | ons | Output-contro! input current Via=Vret 270 | 550 | 1000 uA UNDER Lockout voltage 3.8 5 5.7 v VOLTAGE = ‘Supply vottage at output cutott | oe AVoc.o | LocK-ouT | Hysteresis woo | 200 | 380 | mv Toss | cincurr Standby supply current Voo=15V Al other inputs and outputs open} 67] 115 | ma [coer | SURFENT | Aveo bas current Vo=2v. 73a) 13 | mA TEST CIRCUIT THERMAL DERATING Voo=15V (MAXIMUM RATING) 519 1200 T 3 = 1000 Ce) fs] fe] fs) fh] Po} [3] & 00 é NA z 600 5 400 Pf 5 200 BIBI IG) [J = slg 2W ol aT s 500; a a ——. AMBIENT TEMPERATURE Ta (°C) TEST INPUT Note: To obtain output voltage from the emer follower, connect pins ® and @ to Vee. and connect each of pins @) and {9 t0 ground through resistor R. UNDERVOLTAGE LOCKOUT LOCKOUT VOLTAGE vs CHARACTERISTICS AMBIENT TEMEPRATURE T Test CIRCUIT] | [| | Nv S - 5 4302 2 i | > 30 5 58 sd :
2 Yo 3 - |
Soa + 8 Lure) | w uw 5.0) QF r! g oO ON fo3 — < OW
3 Al SORE
B | g
5 S sof ee
| | Fr . e 4 5 6 —2 0 2 50 75 100 SUPPLY VOLTAGE Veo (V) AMBIENT TEMPERATURE Ta (CC) MITSUBISHI 6—168 ate MBBS
MITSUBISHI <ANALOG ASSP> MST494P,FP,GP SWITCHING REGULATOR CONTROL REFERENCE VOLTAGE OSCILLATOR FREQUENCY VS SUPPLY VOLTAGE VS TIMING RESISTANCE 6 3. CRSA pee $ = sooPe HE ~ 5] ~ NSE ee = | | 3 roof Sa p Li 2 INC O 8 ] 3 SCOT ROE 5 3 “ESSE Ne FSF eee STS IN 3 Sib LN! UPN TTT 2 § MRSS & 5 SERGE ey {J 3 CER SERENE ESS Es po | § {CoN ES A 8 “LUTN TINTS Ss 8s 300 1231020 3000 200505 SUPPLY VOLTAGE Veo (V) TIMING RESISTANCE Rr (kQ) OSCILLATOR FREQUENCY CHANGE REFERENCE VOLTAGE CHANGE _-VS AMBIENT TEMPERATURE VS AMBIENT TEMPERATURE g s $ Voon15v £* = Rr=6.2kQ ~ g w Z 2 - 8 - & | Fs e | _ 8 TP TRY g 3 \\ $ -4 2 2 4 60 a TD B89 as 5 00 AMBIENT TEMPERATURE Ta ("C) AMBIENT TEMPERATURE Ta (°C) OUTPUT DUTY CYCLE VS ERROR AMP OPEN LOOP VOLTAGE DEAD-TIME CONTROL INPUT VOLTAGE GAIN VS FREQUENCY ~ 129 Voo=18V 3 ~ z S10} Z 80 ef TTY : \\ é 8 a 3 ap Annee _N\\
3 A z 20
so 0 1 2 3 he) 10100 1k 10k 100k tM 10M OEAD-TIME CONTROL INPUT VOLTAGE Va (V) FREQUENCY 1 (Hz) MITSUBISHI ate TRS 6—169
MITSUBISHI ANALOG ASSP> MST494P,FP,GP SWITCHING REGULATOR CONTROL OUTPUT SATURATION VOLTAGE CIRCUIT CURRENT VS VS OUTPUT CURRENT ~ SUPPLY VOLTAGE 2.0 23 ~ | | fe S88 TT Jvrreareotconeey a \\ocgtb eer en, ze Sos Fe C1 Ses [|] >3 | | \\ aoe | eas 382 o8 aan oez 2 ——} 228 | ot LET TTT TT TI a2 “Oo 40 80, 120 160 200 3 0 10 20 30 40 OUTPUT CURRENT 16, Je (mA) SUPPLY VOLTAGE Vee (V) VOLTAGE WAVEFORMS Vee voLtase AT cr pn®) en Veo voLTase xr tpn) a voLtase THRESHOLD oeAD.TiME vourage sess: CONTROL H INPUT (pin @) ov { t \\ Ft mesnote t i t VOLTAGE =S> t 1 i 1 FEEDBACK H 1 H ' 1 ! ! 1 iotot purty eveue waxt Kot [oe FUNCTION TABLE MITSUBISHI 6—170 ees