april 2009 ? 2003 fairchild semiconductor corporation www.fairchildsemi.com ka7500c ? rev. 1.0.2 ka7500c ? smps controller ka7500c smps controller features ? internal regulator provides a stable 5v reference supply trimmed to 1% accuracy ? uncommitted output tr for 200ma sink or source current ? output control for push-pull or single-ended operation ? variable duty cycle by dead-time control (pin 4) complete pwm control circuit ? on-chip oscillator with master or slave operation ? internal circuit prohibits double pulse at either output description the ka7500c is used for the control circuit of the pulse- width modulation switching regulator. the ka7500c consists of 5v referenc e voltage circuit, two error amplifiers, flip flop, an output control circuit, a pwm comparator, a dead-time comparator, and an oscillator. this device can be operated in the switching frequency of 1khz to 300khz. the precision of voltage reference (v ref ) is improved up to 1% with trimming. this provides a better output voltage regulation. the operating temperature range is -25c ~ +85c. 16-lead dip 16-lead sop ordering information part number operating temperature range eco status package packing method ka7500c 16-lead dual inline package (dip) tube ka7500cd tube ka7500cdtf -25 to +85c rohs 16-lead small outline package (sop) tape and reel for fairchild?s definition of eco status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html .
? 2003 fairchild semiconductor corporation www.fairchildsemi.com ka7500c ? rev. 1.0.2 2 ka7500c ? smps controller block diagram figure 1. block diagram
? 2003 fairchild semiconductor corporation www.fairchildsemi.com ka7500c ? rev. 1.0.2 3 ka7500c ? smps controller typical application ka7500c 12 v cc 11 c2 8 c1 3 comp in put - 2 v ref 14 -15 +1 +16 c t 5 r t 6 d.t 4 gn d 7 e1 9 e2 10 o.c 13 ksa1010 v i =10v to 40v 1mh, 2a v o =5v i o =1a gnd 47 ? 150 ? 1m ? 5.1k ? 5. 1 k ? 5.1k ? 150 ? 47k ? 0.001f + 50f 50v + 0.1 + 50 f 10 v 0.1f + 500f 10v figure 2. pulse-width modul ated step-down converter
? 2003 fairchild semiconductor corporation www.fairchildsemi.com ka7500c ? rev. 1.0.2 4 ka7500c ? smps controller absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. symbol parameter min. max. unit v cc supply voltage 42 v v c collector supply voltage 42 v i o output current 250 ma v in amplifier input voltage v cc + 0.3 v ka7500c 1 p d power dissipation ka7500cd 0.9 w t opr operation temperature range -25 +85 c t stg storage temperature rang -65 +150 c t j junction temperature +125 c recommended operating conditions the recommended operating conditions table defines the conditions for actual device operation. recommended operating conditions are specified to ens ure optimal performance to the datasheet specifications. fairchild does not recommend exceeding them or designing to absolute maximum ratings. symbol parameter min. typ. max. unit v cc power supply voltage 7 15 40 v v c1 , v c2 collector supply voltage 30 40 v i c1 , i c2 collector output current (each transition) 200 ma v in amplifier input voltage 0.3 v cc - 2.0 v i fb current into feedback terminal 0.3 ma i ref reference output terminal 10 ma r t timing resistor 1.8 30.0 500.0 k c t timing capacitor 0.0047 0.0010 10.0000 a f osc oscillator frequency 1 40 200 khz v in_pwm pwm input voltage (pins 3, 4, and 13) 0.3 5.3 v
? 2003 fairchild semiconductor corporation www.fairchildsemi.com ka7500c ? rev. 1.0.2 5 ka7500c ? smps controller electrical characteristics v cc = 20v, f = 10khz, t a = -25c to +85c, unless otherwise specified. symbol parameter conditions min. typ. max. units reference section i ref =1ma, t a =25c (1) 4.95 5.00 5.05 v ref reference output voltage i ref =1ma 4.90 5.00 5.10 v r line line regulation v cc =7v to 40v 2 25 mv r load load regulation i ref =1ma to 10ma 1 15 mv i sc short-circuit output current v ref =0v 10 35 50 ma oscillation frequency c t =0.001f, r t =30k 40.0 c t =0.01f, r t =12k , t a =25c 9.2 10.0 10.8 f osc oscillation frequency c t =0.01f, r t =12k , t a =t low to t high 9.0 12.0 khz f/ t frequency change with temperature c t =0.01f, r t =12k 2 % dead-time control section i bias input bias current v cc =15v, 0v v 4 5.25v -2 -10 a d (max) maximum duty cycle v cc =15v, v 4 =0v, oc pin=v ref 45 % zero duty cycle 3.0 3.3 v ith input threshold voltage maximum duty cycle 0 v error amplifier section v io input offset voltage v 3 =2.5v 2 10 mv i io input offset current v 3 =2.5v 25 250 ma i bias input bias current v 3 =2.5v 0.2 1.0 a v cim common mode input voltage 7v v cc 40v -0.3 v cc v g vo open-loop voltage gain 0.5v v 3 3.5v 70 95 db b w unit-gain bandwidth 650 khz pwm comparator section v ith input threshold voltage zero duty cycle 4.0 4.5 v i sink input sink current v 3 =0.7v -0.3 -0.7 ma output section v ce(sat) output saturation voltage common emitter v e =0v, i c =200ma 1.0 1.3 v cc(sat) emitter-follower v c =15v, i e =-200ma 1.5 2.5 v i c(off) collector off-state current v cc =40v, v ce =40v 2 100 i e(off) emitter off-state current v cc =v c =40v, v e =40v -100 a total device i cc supply current pin6=v ref , v cc =15v 6 10 ma output switching characteristics t r rise time, common emitter, common collector 100 200 t f fall time, common emitter, common collector 25 100 ns note: 1. this is guaranteed where the marking c ode of the package surface is over 027.
? 2003 fairchild semiconductor corporation www.fairchildsemi.com ka7500c ? rev. 1.0.2 6 ka7500c ? smps controller physical dimensions notes: a) this drawing gomplies with jedec ms-012 except as noted. b) this demension is outside the jedec ms-012 value. c) all dimensions are in millimeters. d) dimensions are exclusive of burrs, mold flash, and tie bar extrusions. e) landpattern standard: soic127p600x175-16am. f) drawing file name and revision : m16erev1 0.10 max c 0.303 0.153 land pattern recommendation (r0.20) detail a see detail a 0.90 0.50 (r0.10) 8?? top view side view end view 0.36 seating plane gage plane #1 8 9 16 9.08 8.68 10.10 9.70 6.00 1.27 (0.30) 0.51 0.36 4.15 3.75 a b 0.20 cba 1.80 max 1.65 1.45 0.05 min c 1.75 1.27 0.65 5.60 b b b #1 figure 3. 16-lead small outline package (sop) package drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and condition s, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
? 2003 fairchild semiconductor corporation www.fairchildsemi.com ka7500c ? rev. 1.0.2 7 ka7500c ? smps controller physical dimensions 16 9 8 1 notes: unless otherwise specified a this package conforms to jedec ms-001 variation bb b) all dimensions are in millimeters. d) conforms to asme y14.5m-1994 e) drawing file name: n16erev1 19.68 18.66 6.60 6.09 c) dimensions are exclusive of burrs, mold flash, and tie bar protrusions 3.42 3.17 3.81 2.92 (0.40) 2.54 17.78 0.58 0.35 1.78 1.14 5.33 max 0.38 min 8.13 7.62 0.35 0.20 15 0 8.69 a a top view side view figure 4. 16-lead dual inline package (dip package drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and condition s, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
? 2003 fairchild semiconductor corporation www.fairchildsemi.com ka7500c ? rev. 1.0.2 8 ka7500c ? smps controller
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