technical data 201 2 , april ver. 0 0 ic for ac/dc c onverter with built C in p ower dmos t ransistor with o p erating f requency 132 8 khz f unctional equivalent of tny266 (power integr a tions) description IK3466 is ic for ac/dc converter with build C in power switch with o p erating frequency 132 8 khz realized on the base of high - voltage bicdmos process. ic performs driving of power built in mosfet switch, quantity of energy transferred to load is regulated by means of mosfet on - time. so output voltage practically doesn t depend from load. the ic is purposed for adapter battery chargers of the mobile phones, reserve power supply of pc, tv - sets, ac - adapters, electrical equipment control units, integrated services digital network (isdn) or digital su b scriber line (dsl) network termination. features ? programmable line under - voltage detect circuit prevents power on/off glitches and minimizes quantity of external comp o nents ? 132 khz operation frequency ? high output voltage stability ? simple on/off control, no loop compensation needed ? no load consumption < 50 mw with bias winding and < 250 mw without bias winding at 265 v (ac) input ? high input (supply) voltage makes ic ideal for charger applications ? high bandw idth provides fast turn on with no overshoot ? built - in current limit and thermal protection circuits provide high safety ? built - in automatic restart circuit provides short circuit and open loop protection ? undervoltage detection function pin configuration IK3466 ordering information IK3466 n plastic IK3466 d soic ordering information device operating temper a ture range package packing IK3466 n = - 40 + 125 ? dip - 8 tube IK3466 d sop - 8 tube IK3466 dt sop - 8 tape& reel
i k34 66 201 2 , april ver. 0 0 a1 C a6, a8 C logic elements; a7 C dual - threshold comparator; a9 C current limit comparator; g1, g2 C dc current source; t1 C trigger; vd1 C zener diode; vt1 C vt4 - mos transistors vt5 C high voltage output n - channel dmo s transistor fig. 1 C electric block diagram bypass drain 240 ua regulator 5 , 8 v 50 ua autorestart counter 6 , 3 v current limit unit reset error line under voltage 5 , 8 v 4 , 8 v + - jitter clock & dc max oscilator 1 & 1 q s r q & thermal shutdown + - & leading edge blanking enable 1 , 0 v + u t 1 , 0 v en / uv source 01 02 03 05 04 1 g 1 g 2 a 1 a 2 a 3 t 1 a 4 a 5 a 6 a 7 a 8 a 9 vt 5 vd 1 vt 1 vt 2 vt 3 vt 4
i k34 66 201 2 , april ver. 0 0 table 2 - absolute maximum ratings symbol parameter target unit min max v d drain lead supply voltage - 0,3 700 v i dmax peak current, drain lead, - 560 ma v en / uv en/uv lead voltage - 0,3 9 v i en / uv en/uv lead current - 100 ma v bp bypass lead voltage - 0,3 9 v t stg storage temperature - 60 150 o c * stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only and functional op eration of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. exposure to absolute - maximum - rated conditions for extended periods may affect device reliability. table 3 C recommended o peration m ode symbol parameter norm unit min max v ds drain lead supply voltage 50 7 00 v i ds peak current, drain lead, - 375 ma v bp bypass lead voltage - 6,15 v j junction temperature - 40 * 125 o c ________ * ambient temperature table 3 C electric p arameters IK3466 . ( j - 40* +125 o c, source = 0v , unless otherwise specified) parameter symbol measurement mode target unit min. max. control function operating frequency f osc j = 25 o c 124 140 khz maximum duty cycle dc max s1 open 62 68 % en/uv pin turnoff threshold cu r rent i dis - 300 - 170 ? a en/uv pin voltage v en i en/uv = - 125 ua 0,4 1,5 v i en/uv = 25 ua 1,3 2,7 drain supply current i s1 v en/uv =0 v 500 ? a i s2 en/uv open (mosfet switc h ing) notes 1, 2 320
i k34 66 201 2 , april ver. 0 0 table 3 c ontinued parameter symbol mode of measur e ments target unit min. max. bypass pin charge current i ch1 v bp = 0 v, t j = 25 o c note 3 - 7,5 - 2,5 ma i ch2 v bp = 4 v, t j = 25 o c note 3 - 4,5 - 1,5 bypass pin voltage v bp note 3 5,6 6,15 v bypass pin voltage hysteresis v bph - 0,8 1,2 v en/uv pin line under - voltage threshold current i luv j = 25c 44 54 ? a protection circuit current limit i limit di/dt = 70 ma/ ? s 325 375 ma initial current limit i init j = 25c 0.65 x i limit(min) ma leading edge blank ing time t leb j = 25c note 4 170 ns thermal shutdown temperature t sd - 125 150 o c output parameters on - state switch resistance r ds(on) i d = 35ma j = 25 o c 16 ? j = 100 o c 24 off - state switch drain cu r rent i dss v bp = 6.2 v, v en/uv = 0 v , v ds = 560 v, t j = 125 o c - 50 ? a breakdown voltage bv dss v bp = 6.2 v, v en/uv = 0 v, t j = 25 o c, note 5 700 - v drain pin supply voltage 50 - v en/uv pin output signal d e lay t en/uv - 10 ? s notes: 1. total current consumption is the sum of i s1 and i ds s when en/uv pin is shorted to ground (mosfet not switching) and the sum of i s2 and i dss when en/uv pin is open (mosfet switc h ing). 2. consumption current measurement during the output mosfet is switching can be pe r formed at 6.1 v on bypass pin. 3. bp pin is not purposed for sourcing supply current to external circuitry. 4. this parameter is derived from characterization. 5. shutdown voltage can be verified under the specification with minimum of bv dss on an i n clined drain pin voltage closely, but not exc eeding minimum of bv dss 6. parameters are guaranteed for constant junction temperature j . measurements of parameters have to be pro c essed in pulse modes. _______________ * ambient temperature
i k34 66 201 2 , april ver. 0 0 table 4 C typical e lectric p arameters of IK3466 ( on default t a = 25 o c, source = 0 v, unless otherwise specified) parameter symbol mode of measu rement typical value unit max deviation 8 khz current limit delay t ild j = 25 o c, note 1, 2 150 ns thermal shutdown hysteresis 70 o c rise time t r measured in a typical fee d back ic application 50 ns fall time t f 50 ns output disable setup tim e t dst 0,5 ? s auto - restart on - time t ar j = 25 o c, note 3 50 ms auto - restart duty cycle d car 5,6 % note 1. this parameter is derived from characterization. 2. this parameter is derived from the change in current limit measured at 1x and 4x of the di/dt shown in the i limit specification. 3. auto - restart on time has the same temperature characteristics as the oscillator (inversely proportional to fr e quency).
i k34 66 201 2 , april ver. 0 0 operation description unlike conventional pwm (pulse width modulator) controllers, IK3466 uses a simple on/off control to regulate the ou t put voltage. figure 1 shows the electric block diagram. the IK3466 consists of ? 132khz oscillator , ? enable circuit (sense and logic), ? voltage regulator 5.8 v ? under - voltage circuit ? leading edge circuit ? current limit circuit ? temperature protection circuit ? auto - restart counter the oscillator frequency is internally set to 132 khz. two signals are generated from the oscillator: the maximum duty c y cle signal (dcmax) and the clock signal that indicates the s tart of each cycle. the oscillator contain built - in circuitry that introduces a small amount of frequency jitter, typically 8 khz peak - to - peak, to minimize emi emission. the modulation rate of the frequency jitter is set to 1 khz to optimize emi reduction for both average and quasi - peak emissions. the frequency jitter should be measured with the oscill o scope synchronized at the falling edge of the waveform. the enable input circuit at the en/uv pin consists of a low impedance source follower output set at 1.0 v. under most operating conditions (except when close to noload), the low impedance of the source fo l lower keeps the voltage on the en/uv pin from going much below 1.0 v in the disabled state. this i m proves the response time of the optocoupler that i s usually connected to this pin. the 5.8 v regulator charges the bypass capacitor connected to the bypass pin to 5.8 v by drawing a current from the vol t age on the drain pin, whenever the mosfet is off. the bypass pin is the internal supply voltage node fo r the IK3466 . when the transistor vt5 is on, the IK3466 operates from the energy stored in the bypass capacitor. extremely low power consumption of the internal ci r cuitry allows to operate continuously from current it takes from the drain pin. a bypass cap acitor value of 0.1 ? f is sufficient for both high frequency d e coupling and energy storage. in addition, there is a 6.3 v shunt regulator clamping the bypass pin at 6.3 v when current is pr o vided to the bypass pin through an external resistor. the bypass p in under - voltage sensing circuit disables the transistor vt5 when the bypass pin vol t age drops below 4.8 v. once the bypass pin voltage drops below 4.8 v, it must rise back to 5.8 v to enable (turn - on) the transistor vt5. the over temperature protection ci rcuit disables the output power transistor vt5. to prevent cyclic fault action the over temperature protection circuit has temperature hysteresis about 70 o c. a large temperature hysteresis (~70 o c) guarantees prevention of overheating of the pcb under cont i nuous fault condition. the current limit circuit senses the current in the transistor vt5. when this current exceeds the internal threshold (ilimit), the e transistor vt5 is turned off to the end of that cycle. the current limit circuit reduces the c urrent limit threshold under medium and light loads. the leading edge blanking circuit inhibits the current limit comparator for a short time (tleb) a f ter the transistor vt5 is turned on. this leading edge blanking time has been set so that current spikes caused by capacitance and se c ondary - side rectifier reverse recovery time will not cause untimely termination of the switching pulse. in the event of a fault condition such as output overload, output short circuit, or an open loop condition, the IK3466 ente rs into auto - restart mode. if the en/uv pin is not pulled low for 50 ms, the transistor vt5 switching is normally disabled for 850 ms (except in the case of line under - voltage condition in which case it is disabled until the co n dition is removed). the auto - restart alternately enables and disables the switching of the transistor vt5 until the fault condition is removed.
i k34 66 201 2 , april ver. 0 0 t1 C pulse transformer; v1 C optoelectronic device with phototransistor; vd1, vd2 C diodes; vd3 C zener diode fig. 2 C typical applicat ion
i k34 66 201 2 , april ver. 0 0 typical performance characteristics fig. 3 C average operating f requency f osc vs.temperature. t j fig . 4 C drain consumption current i s vs drain supply voltage v d
i k34 66 201 2 , april ver. 0 0 fig. 5 C power dissipation p tot vs drain supply voltage v d
i k34 66 201 2 , april ver. 0 0 n suffix plastic dip (ms C 001ba) symbol min max a 8.51 10.16 b 6.1 7.11 c 5.33 d 0.36 0.56 f 1.14 1.78 g h j 0 10 k 2.92 3.81 notes: l 7.62 8.26 1. ???? dimensions a, b do not include mold flash or protrusions. m 0.2 0.36 maximum mold flash or protrusions 0.25?mm (0.010) per side. n 0.38 d suffix soic (ms - 012aa) symbol min max a 4.8 5 b 3.8 4 c 1.35 1.75 d 0.33 0.51 f 0.4 1.27 g h j 0 8 notes: k 0.1 0.25 1. ???? dimensions a and b do not include mold flash or protrusion. m 0.19 0.25 2. ???? maximum mold flash or protrusion 0.15?mm (0.006) per side p 5.8 6.2 for a; for b ? 0.25?mm (0.010) per side. r 0.25 0.5 1.27 5.72 dimension, mm dimension, mm 2.54 7.62 a b h c k c m j f m p g d r x 45 seating plane 0.25 (0.010) m t -t- 1 8 4 5 l h m j a b f g d seating plane n k 0.25 (0.010) m t -t- c 1 8 4 5
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