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“© TELEDYNE T53U-3| SEMICONDUCTOR The Analog Signal Processing Company™ TSC91 1 0 TSC9111 HIGH-VOLTAGE SWITCHMODE CONTROLLERS . Features aba BE Curentmode Control” mn is gat Bi High-Speed, Source-Sink Output Drive Ue 7 A j ! | i Internal Start-up Circult INE ¢ @ Internal Oscillator (up to 1 MHz) YI ij ) | SS, ll Reference Selection yt ty TSOBHH soos. jsotseeusionalsiocLIID! Mow rang | N) tt > ul je Se \\ tet lM Distributed Power Systems i J \\ ISDN Equipment @ PBX Equipment y @ Modems Functional Diagram | vary ar 9 MA fe 7 7rT- 3 i > a] oo Yoo 0% mats b6 mg = . ee = rrecapateittan 11-113

TSC9110 SWITCHMODE CONTROLLERS TSC9111 T-58-11-31 ae General Description Absolute Maximum Ratings ‘The TSC91 10/TSC9111 are DICMOS integrated clroults designed Voltage Referenced to ~Vin Tradecs hicperomance eviehmode sontclrs A hgrakoge Vog vrtsstesseseeetesetsesensereeeseeeeses 115.0 V DMOS input allows the controller to work over a wide range of Input +Vivsssssesssseeesusseesssrsteeees verter #00120 V voltages (10- to 120-VDO). Current-mode PWM control circuitry is Logie inputs (RESET, SHUTOOWN, implemented in CMOS to reduce internal power consumption to OSC IN). eeeeeeeseeecesseesasse=0.8 V to Veo +0.3 V ‘SHUTDOWN and RESET inputs allow external loglo control, and Operating Temperature (4 gut ren ~85 0 + 25°0 these Inputs can also be used to provide a variable shutdown . ultlh) rere es 4010 ¥ te for taut rotation ut pullout diver prove ah Junction Temperature (Ty) «+ ++sereerseveeeree #160°O speed switching for MOSPOWER devices large enough to aupaly 0 Wof output power. When combined wih an ouput Prower Dissipation (Package) $000 mv MOSFET and tenstormer, the Tsco110 or TSCO111 canbe =f 4-bin pieatio DIP ‘asa vorrei 900 mw ae ee ttoeele most single-ended power converter topo! 44.pin SOHC (Y SuiK} ss 0 2s cee see eee ee 800 mW ‘The TSC9110 and TSC9111 are available In 14-pin plastic, SO1C Thermal Impedance (0,4) suffix (6510 +126) and industrial, E sutfix(-40to +85°C) —14-Pin Plastlo DIP. eee sce s ccc 16720 temperature ranges. F4Pin BOI. 4402 NOTES: ‘Device mounted with all loads soldered or welded to PC board ‘*Derate 10 mWi/°C above +60°C 2Derate 6 mW/*C above 425°C “Derate 7 mWI°C above +25°C Pin Configuration DusliLine Package ens [i] fs] Fe ooaAqaqaq wn] [id come OOO rir weld FF neser we 2 1 10 8 ourpur [4] [ii] SRUTOOWN (Same pinout as Qual-in-Line) vn fig) Veer . 12394 6 67 eel Voo[| fa] cischanae Oooo oto 80 our [5] fa] oom oo0o00dou Too View ‘Top View Order Numbers: Order Numbere: ‘CorDIP: TSCO110EJF, TSCS111EJF ‘TSC9110EOF, TSCO111EOF Plastic: TSC9110EPF, TSCO111EPF

SWITCHMODE CONTROLLERS TSC9110 a Electrical Characteristics: DISCHARGE = -Viy = 0 V, Veo = 10 V, +Vin = 48 V, Rag = 990 KO, Rogo = 330 kn, T = +25°O, unless otherwise Indicated. —___ ne LIMITS : MM SUFFIX E SUFFIX 55 to +126°C 40 to +85°C SYMBOL PARAMETER CONDITIONS Tver WIN MAX MIN," MAX UNIT Reference M Va Output Voltage thee Dolulled Description) 40 v ee Zour Output Impedance 30 ka Short Ciroult Currant Veer = Vin 100 oA ea ‘Temperature Stability See Note 3 1 Veo ie Oscillator foso Maximum Frequency Rose = 0 3 1 1 MHz nn Inia! Accuracy S00 Note 4 nr en) 80 120 kHz ee Voso Voltage Stability 95 VsVoos = 195 V 28 % Sn ev Temperature Cooticient S00 Note 3 500 ppmis0 et Error Amplifier FB tied to COMP —TSCOII0 400896 ——4.04 396404 v Ven Feedback Input Voltage See Detalled Description ot Relerence Section TSCati 400» 3604.40 360 440 v Input BIAS Current Vp = 40V 25 500 600 A ‘Avon Open Loop Voltage Gain 80 60 60 8 ci Unity Gain Bandwidth 1 MHz nnn Sn Zour Output Impedanca 60 ka cc Source Veg = 34 V 20 14 14 mA four Output Current Sink Vpp = 45 V O18 a2 a2 mA Se ES PSRR Power Supply Rejection 95 V2Veos = 135 V 7 8 Plea sped Current Limit Veounce Threshold Voltage Veo = OV 12 10 14 4014 v Sa te Delay to Output Veense «14, S00 Figure 1 100 180 160 ne Sn Preregulator/Startuy input Votege hy = 10 0A 120 120 v a ‘+hy Input Leakage Current Veo204 V 10 10 wA ee Vog Preregulator Tun-OFF ‘Threshold Voltage ‘erenequuaron = 10 #A bead 94 bead v Underveltage Lockout GSE Boated Beseription) bal 8a had v

TSC9110 SWITCHMODE CONTROLLERS TSC9111 T-58-11-31 i Electrical Characteristics (Cont.): DISCHARGE = -Viy = 0 V, Voo = 10 V, +Vin = 48 V, Rains = 390 KO, Rosg = 330 kf, T = +25°C, unless otherwise indicated. See LIMITS M SUFFIX E SUFFIX 55 to +125°C 40 to +85°C SYMBOL PARAMETER CONDITIONS TYP? MIN MAX MIN MAX ‘UNIT Supply loo ‘Supply Current 08 10 10 mA tous ‘Blas Current 15 vA ee to SHUTDOWN Delay Veunse = ~Vou 50 100 100 ne ‘See Figure 2 a AST EEE tow SHUTDOWN Pulse Width ‘See Figure 3 50 50 ns Sa taw RESET Pulse Width ‘See Figure 3 50 50° ns tw Ectlag Fulee Wath ow 800 Figures 8 28 ns Vu Input LOW Voltage: 20 20 v er Vin Input HIGH Voltage 80 80 v Input Current hy (nut Votlage HIGH Vin = 10V 1 5 5 uA he mbar Golage LOW Viv = ov ad “6 * i“ OUTPUT four = 1 mA 990 990. v Vox Output HIGH Voltage Se ‘See Note 3 976 976 v Ee v 0 LOW wr tour = -1 mA 0.10 0.10 v had “0° ‘See Note 3 0.25 028 out f 20 co) 30 a jut Resistance a — Pour m ‘See Note 3 26 50 35 a t Rise Time O, = 500 pF 40 75 15 ns t Fall Time Oy = 500 pF 40 8 78 ne NOTES: 1, Guaranteed by design, not subject to production test. 3 Temperature = +126, +85°C; -56, -40°C 2. ‘Typleal Values are for DESIGN AID ONLY, not guaranteed nor aub- A. Ograay Pin 8 = 0 pF. Ject to production testing.

  • 1.4V- - Veco SENSE cow tas 10ne SHUTDOWN go tes 10ne oureur 80% oureur ve <o% o- . o- tew Veo tw Veo - tew Figure 3 Typical Characteristics +Viy V8. +hy at Startup Output Switching Frequency vs. Oscillator “0 TTTTILLIIL : ee eee

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; 0 ) PN ot LTT Trt Tf ett J oL LEFT i ttt ot LITT ETT : 10 16 20 10k 100k 1M Hay (A) Foaton (a) Figure 4 and Figure 6

TSC9110 SWITCHMODE CONTROLLERS TSC9111 T-58-11-31 tt Detalled Description tolerance with ive accuracy. The TeQwts 1 accommodates the requirements of these applications at a lower cost, by leaving Proregulator/Startup Section the reference voltage untrimmed. The 10% acourate reference Duo to the fow quiescent currant requirement of the TSC9110/ thus provided Is sufflolent to establish a DC bias point for the TSC9111 control circuitry, bias power can be supplied fromthe error amplifier. unregulated Input power source, from an external regulated low- voltage supply, or from an auxiliary “bootstrap” windingonthe Error Amplifler output Inductor or transformer. Closed-loop regulation is provided by the error amplifier, which When power Is first applied duting startup, +Viy (pln 2) will is Intended for use with “around-the-amplifier” compensation. draw a constant current. The magnitude of this currents deter- An MOS differential input stage provides for low Input current. mined by @ high-voltage depletion MOSFET device whichis con-. The non-inverting input to the error amplifier (Vaes) is internally nected between +Viy and Vog (pin 6). This startup circuitry connected to the output of the reference supply and should be provides initial power to the IC by charging an external bypass bypassed with a small capacitor to ground. capacitance connected to the Voc pin. The constant current Is disabled when, Veg ‘exceeds 8.6 v. it Wea Is not forced to Oscillator Section ‘exceed the 8.6 V threshold, then Vco will be regulated to @ The oscillator consists of a ring of CMOS inverters, capacitors, nominal value of 8.6 V by the praregulator circuit. anda capacitor discharge switch, Frequency is eetby an exter. As the supply voltage rises toward the normal operating condl- nal resistor between the OSC IN and OSC OUT pins. (See Figure tions, an Internal undervoltage (UV) lockout clrcult keeps the out- _& for detalls of resistor value vs. frequency.) The DISCHARGE ut MOSFET disabled untll Vo exceeds the undarvoltage _pin should be tied to ~ Vjy for normal internal oscillator opera Feckout threshold typleally8.1 VicThis guarantees that the con. tion. A frequency divider In the loglo section limits switch duty trol logic will be functioning properly and that sufficient gate drive cycle to <60% by locking the switching frequency to one half Voltage is avaliable before the MOSFET turns ON. The design of the oscillator frequency. of the IC Is such that the undervoltage lockout threshold will not txceed the prereguletor tut voltage. Power dissipation can Re™ote.aynchronizalion pulge vo ie os De be minimized by providing an external power source to Voc gerios with 10 ka to pin 8. such that the constant current source Is always disabled. - NOTE: During startup or when Veo drops below 8.8 V the SHUTDOWN Nerup creultis capablect sourcing’ o20mA,thismayleaad SHUTDOWN and RESET toa high level of power dissipation in the IC (for a 48 V input, SHUTDOWN (pin 11) and RESET (pin 12) are intended for over- fpprosimatly 1), Excessive atertup ime can ruin device fldng the output MOSFET utah via externa contol fog, The damage. See Figure 4 for calculation of power dissipation puts are fed throug! ing the output switch, during startup. " " Depending on the logie slate of RESET, SHUTOOWN can bo gither a latched or unlatched input. The output Is OFF whenever Blas RESET ow tho atch eect and’ SHOROOWN tun the latch Is set 148 no effect until _ To properly got the blas for the TSC9110/TSC9111, a 990 kn ; Tealator should be tied from BIAS (pin 1) to.—Vq(pin 8). This RESET goes high. The truth table for these Inputs Is givan in dtermines the magnitude of bias current in all of the analog : sectone and the pullup curant forthe SHUTDOWN and RESET Both pins have internal current source pull-ups and can be left pins, The current fowingin the bias resstorisnominaly 16 A. dlconnected when notin use, An added feature of ho current ‘sources {s the ability to connect a capacitor and an open-collector Reference Section driver to the SRUTOOWN ‘or RESET pins to provide variable ‘The reference section of the TSC9110 consists of a temperature Shutdown time, compensated buried zener and trimmable divider network. The output of the reference section Is connected intamally to the non inverting Input of the error amplifier. Nominal reference output Table 4: Truth Table for the SHUTDOWN and RESET pins voltage Is 4,0 V. The trimming procedure that Is used on the TSCO110 brings the output of the error amplifier (which is con- [ SHUTDOWN | Reser | _oureur _—i figured for unty gain uring timing) to within 196 of 4.0 V. Is automatically compensates for the input offset voltage In the error amplifier, H H Normat Operation ‘The output Impedance of the reference section has been purposely 4 ~ Normal Operation made high so that a low impedance external voltage source can (No Change) bbe used to override the Internal voltage source, if desired, without L “ OFF (Nick Latched) otherwise altering the performanca of the device. Applications which use a separate extemal reference, such as t t OFF (Latched) rnon-solated converter topologies and circults employing optical coupling In the feedback loop, do not require a trimmed voltage + t OFF (Latched) (No Change)

SWITCHMODE CONTROLLERS TSC9110 Output Switch The push-pull driver output has a typical ON resistance of 202. Maximum switching times are specified at 75 ns for a 500 pF load. This is sufficient to directly drive MOSFETs such as the 2N7004, 2N7005, [RFD120 and IRFD220. Larger devices can be riven, but switching times will be longer, resulting in higher swit- ching losses. In order to drive large MOSPOWER devices, it is . necessary to use an external driver IC, such as the Siliconix D469. The D469 can switch very large devices such as the SMM2ONSO (500 V, 0:3 0) In approximately 100 ns.

Applications

5-Watt Power Supply for Telecom Applications ° . insaze . a“ O80, ene StS a ce NEES cD) 22oue OF nao 1000 pF: ry) ata oy 20 ANSB10 ar HE ray FEEOBACK ”— 180k @ 0.25 4 wv TSC9110 oie OY» ropwe 10) 4 anro04 18k FEEDBACK an TORR oe 10

40 VON

Ci] li e voved ane] fa C3} [12h Gd Ft NOTES: 1. Ry = 290 KO, % W Ls] a 4. Ry = 1000, MW wove | ARtal fo} eats ew a