IP1526 series 4/99 semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab .co .uk website: http://www .semelab .co .uk semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab .co .uk website: http://www .semelab .co .uk regulating pulse width modulator features ? 8 to 35v operation ? 5v reference trimmed to 1% ? 1hz to 400khz oscillator range ? dual 100ma source/sink outputs ? digital current limiting ? double pulse suppression ? programmable deadtime ? undervoltage lockout ? single pulse metering ? programmable soft start ? wide current limit common mode range ? ttl/cmos compatible logic ports ? symmetry correction capability ? guaranteed 6 unit synchronisation +v in input voltage collector supply voltage logic inputs analogue inputs source / sink load current reference load current logic sink current p d power dissipation t a = 25c derate @ t a > 50c p d power dissipation t c = 25c derate @ t c > 25c t j operating junction temperature t stg storage temperature range t l lead temperature (soldering, 10 seconds) +40v +40v C0.3 to +5.5v C0.3 to +v in 200ma internally limited 15ma 1w 10mw/c 3w 24mw/c see ordering information C65 to +150c +300c absolute maximum ratings (t case = 25c unless otherwise stated) top view j package C 18 pin ceramic dip n package C 18 pin plastic dip dw package C 18 pin plastic (300) soic 8 1 2 3 4 5 6 7 14 13 12 11 10 9 15 16 17 18 v ref output b ground output a +error Cerror compensation softstart c reset +current sense Ccurrent sense shutdown c timing r timing r deadtime +v in collector +v sync part jCpack nCpack dC18 temp. number 18 pin 18 pin 18 pin range IP1526 4 -55 to +125c ip3526 444 0 to +70c order information note: to order, add the package identifier to the part number. eg. IP1526j ip3526dwC18
IP1526 series 4/99 semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab .co .uk website: http://www .semelab .co .uk semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab .co .uk website: http://www .semelab .co .uk 8 1 2 3 4 5 6 7 14 13 12 11 10 9 15 16 17 18 v ref output b ground output a +error Cerror compensation softstart c reset +current sense Ccurrent sense shutdown c timing r timing r deadtime +v in collector +v sync +8 to +35v +4.5 to +35v 0 to 100ma 0 to 20ma 1hz to 400khz 2k w to 150k w 470pf to 20 m f 3% to 50% C55 to +125c 0 to +70c recommended operating conditions v in input voltage collector voltage sink/source load current (each output) reference load current oscillator frequency range r t oscillator timing resistor c t oscillator timing capacitor available deadtime range @ 40khz operating ambient temperature range IP1526 ip3526 description the IP1526 and ip3526 high performance monolithic pulse width modulator circuits are designed for fixed-frequency switching regulators and other power control applications. included in an 1 8-pin dual-in-line package are a temperature compensated volt age reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse metering and steering logic, and two low impedanc e power drivers. also included are protective features such as soft-start and under-voltage lockout, digital current limiting, double p ulse inhibit, a data latch for single pulse metering, adjustable deadtime, and provision for symmetry correction inputs. for ease of interface, all digital control ports are ttl and b-series cmos compatible. active low logic design allows wired-or connections for maximum flexibility . this versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transfor merless and transformer coupled. block diagram
IP1526 series 4/99 semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab .co .uk website: http://www .semelab .co .uk output voltage line regulation load regulation temperature stability total output voltage range short circuit current reset output voltage initial accuracy voltage stability temperature stability minimum frequency maximum frequency sawtooth peak voltage sawtooth valley voltage input offset voltage input bias current input offset current dc open loop gain high output voltage low output voltage common mode rejection supply voltage rejection t j = 25c v in = 8 to 35v i l = 0 to 20ma v ref = 0 v ref = 3.8v v ref = 4.8v t j = 25c v in = 8 to 35v r t = 150k w c t = 0.2 m f r t = 2k w c t = 470pf v in = 35v v in = 8v t j = 25c r s 2k w r l 3 10m w v pin1 C v pin2 3 150mv i source = 100 m a v pin1 C v pin2 3 150mv i sink = 100 m a r s 2k w v in = 12v to 18v IP1526 ip3526 parameter test conditions min. typ. max. min. typ. max. units electrical characteristics (t j = over operating temperature range unless otherwise stated) 4.9 5.0 5.1 230 550 15 50 4.85 5.0 5.15 25 80 140 0.2 0.4 2.4 4.8 3 8 0.5 1 710 100 400 3 3.5 1 210 C350 C2000 35 200 60 72 3.6 4.2 0.2 0.4 70 94 66 80 4.95 5.0 5.05 220 530 15 50 4.9 5.0 5.1 25 80 140 0.2 0.4 2.4 4.8 3 8 0.5 1 310 100 400 3 3.5 0.5 1 25 C350 C1000 35 100 64 72 3.6 4.2 0.2 0.4 70 94 66 80 v mv mv v ma v % hz khz v mv na db v v db reference section oscillator section 2 undervoltage lockout error amplifier section 3 notes 1. test conditions unless otherwise stated: v in = 15v t j = C55 to +125c for IP1526 t j = 0 to +70c for ip3526 2. oscillator / pwm section test conditions: f osc = 40khz (r t = 4.12k w , c t = 0.01 m f 1%, r d = 0) 3. error amplifier section test condition: v cm = 0 to 5.2v
IP1526 series 4/99 semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab .co .uk website: http://www .semelab .co .uk v pin2 C v pin1 3 150mv v pin1 C v pin2 3 150mv i source = 40 m a i sink = 3.6ma v ih = 2.4v v il = 0.4v r s 50 w reset = 0.4v reset = 2.4v i source = 20ma i source = 100ma i sink = 20ma i sink = 100ma v c = 40v c l = 1000pf c l = 1000pf v in = 35v r t = 4.12k w shutdown = 0.4v minimum duty cycle maximum duty cycle high output voltage low output voltage high input current low input current sense voltage input bias current error clamp voltage c s charging current high output voltage low output voltage collector leakage rise time fall time standby current IP1526 ip3526 parameter test conditions min. typ. max. min. typ. max. units 0 45 49 2.4 4.0 0.2 0.4 C125 C300 C225 C500 80 100 120 C3 C10 0.1 0.4 50 100 150 12.5 13.5 12 13 0.2 0.3 1.2 2.0 50 150 0.3 0.6 0.1 0.2 18 30 0 45 49 2.4 4.0 0.2 0.4 C125 C200 C225 C360 90 100 110 C3 C10 0.1 0.4 50 100 150 12.5 13.5 12 13 0.2 0.3 1.2 2.0 50 150 0.3 0.6 0.1 0.2 18 30 % v m a mv m a v m a v v m a m s ma notes 1. test conditions unless otherwise stated: v in = 15v t j = C55 to +125c for IP1526 t j = 0 to +70c for ip3526 2. oscillator / pwm section test conditions: f osc = 40khz (r t = 4.12k w , c t = 0.01 m f 1%, r d = 0) 3. error amplifier section test conditions: v cm = 0 to 5.2v 4. current limit comparator section test conditions: v cm = 0 to 12v 5. output driver section test conditions: v c = 15v electrical characteristics (t j = over operating temperature range unless otherwise stated) pwm comparator 2 digital ports (sync, shutdown & reset) current limit comparator 4 softCstart section output drivers (each output) 5 power consumption
IP1526 series 4/99 semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab .co .uk website: http://www .semelab .co .uk 14 a b IP1526 +v c gnd 15 13 16 75 w return t1 q1 q2 +15v applications information 14 a b IP1526 +v c gnd 15 13 16 +v supply r1 return r2 c2 r3 c1 q1 q2 t1 14 a b IP1526 +v c gnd 15 13 16 +v supply r1 return r2 c2 r3 c1 q1 q2 t1 pushCpull configuration driving nCchannel power mosfets singleCended configuration
IP1526 series 4/99 semelab plc. telephone +44(0)1455 556565. fax +44(0)1455 552612. e-mail: sales@semelab .co .uk website: http://www .semelab .co .uk typical performance characteristics soft start time vs c s output driver saturation voltage output driver deadtime vs r d value oscillator period vs r t and c t
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