ap2001 monolithic dual channel pwm controller this datasheet contains new product information. anachip corp. re serves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sale of the product. rev. 1.1 may 23, 2005 1/9 ? features - dual pwm control circuitry - operating voltage can be up to 50v - adjustable dead time control (dtc) - under voltage lockout (uvlo) protection - short circuit protection (scp) - variable oscillator frequency...... 500khz max - 2.5v voltage reference output - 16-pin pdip, tssop and sop packages ? applications - backlight inverter - dc/dc converts in computers, etc. ? general description the ap2001 integrates pulse-width-modulation (pwm) control circuit into a single chip, mainly designs for power-supply regulator. all the functions included an on-chip 2.5v reference output, two error amplifiers, an adjustable oscillator, two dead-time comparators, uvlo, scp, dtc circuitry, and dual common-emitter (ce) output transistor circuit. recommend the output ce transistors as pre-driver for driving externally. the dtc can provide from 0% to 100%. switching frequency can be adjustable by trimming rt and ct. during low vcc situation, the uvlo makes sure that the outputs are off until the internal circuit is operational normally. ? pin assignments 1 2 3 15 14 13 12 11 10 9 8 7 6 5 4 16 ct ea2+ ea2- fb2 dtc2 out2 vcc gnd out1 dtc1 fb1 ea1+ rt ref scp ea1- ( top view ) pdip/tssop/sop ? pin descriptions name description ct timing capacitor rt timing resistor ea+ error amplifier input(+) ea - error amplifier input(-) fb feedback loop compensation dtc dead time control out pre-driver output gnd ground vcc supply voltage scp short circuit protection ref voltage reference
ap2001 monolithic dual channel pwm controller anachip corp. www.anachip.com.tw rev. 1.1 ma y 23, 2005 2/9 ? ordering information ap2001 x x x package packing n: pdip-16l s: sop-16l ts: tssop-16l blank: tube a : taping lead free blank : normal l : lead free package ? block diagram bandgap reference dtc2 ref out1 out2 pwm amplifier 2 pwm amplifier 1 ea1 + ea1 - vcc oscillator rt scp ct dtc1 error amplifier 1 fb1 ea2+ ea2 - error amplifier 2 fb2 r s vref uvlo r max.500khz gnd 170k 1.18v + - + - + + + + -
ap2001 monolithic dual channel pwm controller anachip corp. www.anachip.com.tw rev. 1.1 ma y 23, 2005 3/9 ? absolute maxi mum ratings symbol parameter rating unit v cc supply voltage 40 v v i amplifier input voltage 20 v v o collector output voltage 40 v io collector output current 21 ma t op operating temperature range -20 to +85 o c t st storage temperature range -65 to +150 o c t lead lead temperature 1.6 mm (1/16 inch) from case for 10 seconds 260 o c ? recommended operat ing conditions symbol parameter min. max. unit v cc supply voltage 3.6 40 v v i amplifier input voltage 1.05 1.45 v v o collector output voltage 40 v i o collector output current 20 ma i fb current into feedback terminal 45 a r f feedback resistor 100 k ? c t timing capacitor 150 15000 pf r t timing resistor 5.1 100 k ? f osc oscillator frequency 1 500 khz t op operating free-air temperature -20 85 oc
ap2001 monolithic dual channel pwm controller anachip corp. www.anachip.com.tw rev. 1.1 ma y 23, 2005 4/9 ? electrical characteristics (t a =25oc, v cc =6v, f=200 khz) reference (ref) symbol parameter conditions min. typ. max. unit output voltage (pin 16) i o = 1ma 2.4 2.5 2.6 v t a = -20oc ~ 25oc -0.1 1 % v o output voltage change with temperature t a = 25oc ~ 85oc -0.2 1 % v dli input stability v cc =3.6v ~ 40v 2 12.5 mv v dlo output stability i o =0.1 ma ~ 1ma 1 7.5 mv i o short-circuit output current v o =0 3 10 30 ma under voltage lockout (uvlo) symbol parameter conditions min. typ. max. unit v ut upper threshold voltage (v cc ) 2.65 v v lw t lower threshold voltage (v cc ) 2.45 v v ht hysteresis (v cc ) i o(ref) = 0.1ma t a = 25oc 80 200 mv short-circuit protection (scp) control symbol parameter conditions min. typ. max. unit v it input threshold voltage t a = 25oc 0.65 0.7 0.75 v v stb standby voltage no pull up 140 185 230 mv v lt latched input voltage no pull up 60 120 mv i scp input (source) current v i = 0.7v, t a = 25oc -10 -15 -20 a v ct comparator threshold voltage (fb) 1.18 v oscillator (osc) symbol parameter conditions min. typ. max. unit f osc frequency c t =330 pf, r t = 10 k ? 200 khz standard deviation of frequency c t =330 pf, r t = 10 k ? 10 frequency change with voltage v cc =3.6v ~ 40v 1 t a = -20oc ~ 25oc -0.4 2 ? f osc frequency change with temperature t a = 25oc ~ 85oc -0.2 2 % dead-time control (dtc) symbol parameter conditions min. typ. max. unit i bdt input bias current 1 i dt latch mode (source) current t a = 25oc -80 -145 a v dt latched input voltage i o = 40a 2.3 v t0 zero duty cycle 2.05 2.25 v t100 input threshold voltage at f= 10 khz maximum duty cycle 1.2 1.45 v
ap2001 monolithic dual channel pwm controller anachip corp. www.anachip.com.tw rev. 1.1 ma y 23, 2005 5/9 ? electrical charact eristics (continued) error-amplifier symbol parameter conditions min. typ. max. unit v io input offset voltage v o (fb)=1.25v 6 mv i io input offset current v o (fb)=1.25v 100 na i ib input bias current v o (fb)=1.25v 160 500 na 1.05 to v cm common-mode input voltage range v cc =3.6v ~ 40v 1.45 v av open-loop voltage amplification r f =200 k ? 70 80 db gbw unity-gain bandwidth 1.5 mhz cmrr common-mode rejection ratio 60 80 db v oh max. output voltage v ref -0.1 v v ol min. output voltage 1 v i oi output (sink) current (fb) v id = -0.1v, v o = 1.25v 0.5 1.6 ma i oo output (source) current (fb) v id = 0.1v, v o = 1.25v -45 -70 a output section symbol parameter conditions min. typ. max. unit i leak leakage current v o = 40v 10 a v sat output saturation voltage i o = 10 ma 1.2 2 v i sc short-circuit output current v o = 6v 90 ma pwm comparator symbol parameter conditions min. typ. max. unit v t0 zero duty cycle 2.05 2.25 v v t100 input threshold voltage at f = 10 khz (fb) maximum duty cycle 1.2 1.45 v total device symbol parameter conditions min. typ. max. unit i ccs standby supply current off-state 2.5 3.0 ma i cca average supply current r t = 10 k ? 2.8 3.5 ma
ap2001 monolithic dual channel pwm controller anachip corp. www.anachip.com.tw rev. 1.1 ma y 23, 2005 6/9 ? typical application circuit ap2001 12345678 16 15 14 13 12 11 10 9 c5 r5 33k 33k 500 pf 470 470 470 220 1uf l2 r6 r7 c4 buck output v ref 33k 500pf c1 r2 r1 33k 50k 0.47uf v cc 200k 470 33k 22k 330pf 150 l1 r3 r4 c2 boost output note: values for r1 through r7 , c1 through c4 , and l1 and l2 depend upon individual application. dual output dc/dc converter ? marking information ( top view ) pdip/tssop/sop 1 9 8 ap2001 yy ww x x logo id code year: "01" = 2001 "02" = 2002 xth week: 01~52 ~ 16 part no. blank: normal l: lead free package
ap2001 monolithic dual channel pwm controller anachip corp. www.anachip.com.tw rev. 1.1 ma y 23, 2005 7/9 ? package information (1) package type: sop-16l e h view "a" l 0.015x45 o c 7 o (4x) view "a" a a1 d b e 7 o (4x) y a2 dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 1.40 1.60 1.75 0.055 0.063 0.069 a1 0.10 - 0.25 0.040 - 0.010 a2 1.30 1.45 1.50 0.051 0.057 0.059 b 0.33 0.41 0.51 0.013 0.016 0.020 c 0.19 0.20 0.25 0.0075 0.008 0.0098 d 9.80 9.90 10.00 0.386 0.390 0.394 e 3.80 3.90 4.00 0.150 0.154 0.157 e - 1.27 - - 0.050 - h 5.80 6.00 6.20 0.228 0.236 0.244 l 0.38 0.71 1.27 0.015 0.028 0.050 0 - 8 0 - 8
ap2001 monolithic dual channel pwm controller anachip corp. www.anachip.com.tw rev. 1.1 ma y 23, 2005 8/9 ? package information (continued) (2) package type: tssop-16l a e e1 b e detail a detail a l a1 d 0.25mm gauge plane 0.127mm typ. a2 s seating plane l1 0.05 dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a - - 1.20 - - 0.047 a1 0.00 - 0.15 0.000 - 0.006 a2 0.80 1.00 1.05 0.031 0.039 0.041 b 0.19 - 0.30 0.007 - 0.012 d 4.90 5.00 5.10 0.193 0.197 0.201 e 6.40 bsc. 0.252 bsc. e1 4.30 4.40 4.50 0.169 0.173 0.177 e 0.65 bsc. 0.026 bsc. l 0.45 0.60 0.75 0.018 0.024 0.030 l1 1.00 ref. 0.039 ref. s 0.20 - - 0.008 - - 0 - 8 0 - 8
ap2001 monolithic dual channel pwm controller anachip corp. www.anachip.com.tw rev. 1.1 ma y 23, 2005 9/9 ? package information (continued) (3) package type: pdip-16l e1 d 7 o (4x) a l b2 b b1 e d1 a2 15 o (4x) e1 eb c detail a e 0.005 r0.005 eb detail a top e-pin indent 0.079 inch bottom 3-pin indent 0.118 inch dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a - - 4.57 - - 0.180 a1 0.38 - - 0.015 - - a2 3.15 3.33 3.50 0.124 0.131 0.138 b 0.36 0.46 0.56 0.014 0.018 0.022 b1 1.14 1.27 1.52 0.045 0.050 0.060 b2 0.81 0.99 1.17 0.032 0.039 0.046 c 0.20 0.25 0.33 0.008 0.010 0.013 d 18.90 19.10 19.30 0.744 0.752 0.760 d1 0.56 0.69 0.76 0.022 0.027 0.030 e 7.62 - 8.26 0.3000 - 0.325 e1 6.15 6.35 6.55 0.242 0.250 0.258 e - 2.54 - - 0.100 - l 2.92 - 3.81 0.115 - 0.150 eb 8.38 - 9.40 0.330 - 0.370
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