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february 2009 rev 2 1/12 1 STV9380A class-d vertical deflection amplifier for 2.5 amp tv and monitor applications features high-efficiency power amplifier no heatsink split supply internal flyback generator output current up to 2.5 a pp suitable for dc-co upling applications few external components protection against low v cc description designed for tv and monitor applications, the STV9380A is a class-d vertical deflection booster assembled in a 20-pin plastic dip package. it operates with supplies up to 18 v and provides an output current up to 2.5 a pp to drive the yoke. the internal flyback generator avoids the need for an extra power supply. figure 1. STV9380A pinout pdip 20 table 1. device summary order code packaging STV9380A tray -v cc -v cc -v cc -v cc -v cc -v cc -v cc pow + v cc pow +v cc eaout in+ in- sgnd out cfly + cfly - boot vreg feedcap freq 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 7 www.st.com obsolete product(s) - obsolete product(s)
STV9380A 2/12 1 pin functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6 i/o waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7.1 environmentally-friendly packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 obsolete product(s) - obsolete product(s)
STV9380A pin functions 3/12 1 pin functions 2 functional description the STV9380A is a vertical deflection circuit operating in class-d. class-d is a modulation method where the output transistors work in switching mode at high frequency. the output signal is restored by filtering the output square wave with an external lc filter. the major interest of this ic is the comparatively low power dissipation in regards to traditional amplifiers operating in class ab, eliminating the need of an heatsink. except for the output stage which uses class-d modulation, the circuit operation is similar to the one of a traditional linear vertical amplifier. a (sawtooth) reference signal has to be applied to the circuit which can accept a differential or single ended signal. this sawtooth is amplified and applied as a current to the deflection yoke. this current is measured by means of a low value resistor. th e resulting voltage is used as a feedback signal to guarantee the conformity of the yoke current with the reference input signal. the overvoltage necessary for a fast retrace is obtained with a chemical capacitor charged at the power supply voltage of the circuit. at th e flyback moment, this capacitor is connected in series with the output stage power supply. this method, used for several years with the linear vertical boosters and called ?internal flyback? or ?flyback generator?, avoids the need of an additional power supply, while reducing the flyback duration. the circuit uses a bcd process that combi nes bipolar, cmos and dmos devices. the output stage is composed of low-r on n-channel dmos transistors. table 2. pin descriptions pin name function pin name function 1-v cc negative supply 11 sgnd signal ground 2-v cc negative supply 12 in- error amplifier inverting input 3-v cc negative supply 13 in+ error amplifier non-inverting input 4 out pwm output 14 ea out error amplifier output 5 cfly+ flyback capacitor 15 +v cc positive supply 6 cfly- flyback capacitor 16 +v cc pow positive power supply 7 boot bootstrap capacitor 17 -vccpow negative power supply 8 (1) vreg internal voltage regulator 18 -v cc negative supply 9 feedcap feed-back integrating capacitor 19 -v cc negative supply 10 freq frequency setting resistor 20 -v cc negative supply 1. the voltage reference, accessible on pin 8, is for internal use only. no additi onal components should be connected to this pin except the decoupling capacitor. obsolete product(s) - obsolete product(s)
functional description STV9380A 4/12 figure 2. test and application circuit diagram flyback flyback output modulator + _ drive generator detection +vcc +vcc power cflyback cfly+ 100nf vreg in+ in - ea out -vcc power -vcc -vcc boot cboot 470nf 4.7nf freq feedcap sgnd pins 1, 2, 3, 18, 19 and 20 out deflection yo k e * cfly- +vcc 1mh input signal 220nf -vcc 100nf 100nf STV9380A 100 f 14 11 9 17 560pf 15 16 8 STV9380A 5 6 7 4 13 12 10 v ref -vcc 470pf 100nf sense resistor f vert = 50 hz 1000 f 1000 f 0.5 150 150 10 k 10 k 1 k 1 k * deflection yoke characteristics: r = 5.5 w, l = 7 mh 200 obsolete product(s) - obsolete product(s)
STV9380A absolute maximum ratings 5/12 figure 3. thermal resistance with on-board square heatsink vs. copper area 3 absolute maximum ratings 0 4 8 12 area (cm2) 40 50 60 70 r thja (c/w) copper area 35 m thickness pc board table 3. absolute maximum ratings symbol parameter value unit v cc dc supply voltage 20 v t stg , t j storage and junction temperature -40 to +150 c t oper operating temperature range -20 to +120 c v esd esd susceptibility - human body model (100 pf discharge through 1.5 k ) 2 kv i out output current 1.6 a v out maximum output voltage (pin 4) with respect to -vcc (pins 1, 2, 3, 18, 19 and 20) and during flyback (1) 1. during the flyback with v cc = 18 v, the maximum output voltage (pin 4) is close to 72 v, with respect to - v cc (pins 1, 2, 3, 18, 19 and 20) 80 v obsolete product(s) - obsolete product(s)
thermal data STV9380A 6/12 4 thermal data pins 1, 2, 3, 18, 19 and 20 are internally connected together and participate in heat evacuation. 5 electrical characteristics t amb = 25c , v cc = 12 v and f vert = 50 hz unless otherwise specified (see figure 2 ). table 4. thermal data symbol parameter value unit r thja junction-to-ambient thermal resistance 70 c/w table 5. electrical characteristics symbol parameter test conditio n minimum typical maximum units +v cc positive supply range +10 +18 v -v cc negative supply range -18 -10 v v cc maximum recommended difference between +v cc and |-v cc | 4 v v ccstar t low v cc detection 6.5 v i q quiescent supply current input voltage = 0 14 ma i y maximum vertical yoke current 1.25 a i 13 , i 12 amplifier input bias current -0.1 a v os output offset voltage (1) -50 +50 mv svr supply voltage rejection (2) 82 db fly thr flyback detection threshold (positive slope) v(14) 1.5 v fly thf flyback detection threshold (negative slope) v(14) 0.5 v p d integrated circuit dissipated power (3) 1.1 w f sw switching frequency r freq = 10 k 120 140 160 khz f sw-op switching frequency operative range 100 200 khz r freq frequency controller resistor range pin 10 7 10 14 k 1. input voltage = 0, measured after the filter (e.g. across the 470 nf filter capacitor) 2. supply rejection of the positive or negative power supply. v cc ripple =1 v pp , f =100 hz, measured on the sense resistor. 3. power dissipated in the circuit in the case of the application from figure 2 and the current in the deflection yoke adjusted to 2.5 a pp . the corresponding power dissipated in the vertical deflection yoke is 2.8 w. obsolete product(s) - obsolete product(s)
STV9380A i/o waveforms 7/12 6 i/o waveforms the following waveforms are obtained with the schematic diagram given in figure 2 . figure 4. current in the deflection yoke (calibration: 0.5 a/div) figure 5. current and voltage in the deflection yoke during flyback (calibration: 0.5 a/div, 10 v/div) obsolete product(s) - obsolete product(s)
i/o waveforms STV9380A 8/12 figure 6. current in the deflection yoke and voltage at the error amplifier output (pin 14) during flyback (calibration: 0.5 a/div, 1 v/div) figure 7. current in the deflection yoke and voltage at the output (pin 4), during flyback (calibration: 0.5 a/div, 10 v/div obsolete product(s) - obsolete product(s)
STV9380A package mechanical data 9/12 7 package mechanical data figure 8. 20-pin plastic dual in-line package, 300-mil width d b2 b e a1 a a2 l c e1 e e1 table 6. jedec standard package dimensions dim. millimeters inches minimum typical maximum minimum typical maximum a5.33 0.210 a1 0.38 0.015 a2 2.92 3.30 4.95 0.115 0.130 0.195 b 0.36 0.46 0.56 0.014 0.018 0.022 b2 1.14 1.52 1.78 0.045 0.060 0.070 c 0.20 0.25 0.36 0.008 0.010 0.014 d 24.89 26.16 26.92 0.980 1.030 1.060 e 7.62 7.87 8.26 0.300 0.310 0.325 e1 6.10 6.35 7.11 0.240 0.250 0.280 e 2.54 0.100 e1 22.86 0.900 l 2.92 3.30 3.81 0.115 0.130 0.150 obsolete product(s) - obsolete product(s)
package mechanical data STV9380A 10/12 7.1 environmentally-friendly packages in order to meet environmental requirements, st offers these devices in different grades of ecopack? packages, depending on their level of environmental compliance. ecopack specifications, grade definitions and product status are available at: www.st.com. ecopack is an st trademark. figure 9. esd protection structure obsolete product(s) - obsolete product(s)
STV9380A revision history 11/12 8 revision history table 7. document revision history date revision changes may 2003 1 initial release 24-feb-2009 2 preliminary banner removed, new template applied and section 7.1 added obsolete product(s) - obsolete product(s)
STV9380A 12/12 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2009 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com obsolete product(s) - obsolete product(s)

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