pq1cz21h2z pq1cz21h2z absolute maximum ratings outline dimensions (unit : mm) 1cz21h epoxy resin 9.7 max. 2.5 min. (0.9) (1.7) 5.5 0.5 6.6 max. 4 ? (1.27) 5.2 0.5 2.3 0.5 (0.5) (0 to 0.25) 0.5 + 0.2 ? 0.1 (0.5) 1 1 2 3 4 5 2 3 3 4 5 v in v out gnd (common to heat sink) o adj on/off control ? ( ) : typical dimensions parameter symbol rating unit input voltage 40 v 1.5 a 8 7 41 ? 1 v v v w v ? 0.3 to + 40 switching current 150 ?c ? 40 to + 85 ?c junction temperature dropout voltage output-com voltage output adjustment terminal voltage v in v i-o v out on/off control voltage v c v adj i sw t j (ta = 25 c) operating temperature storage temperature soldering temperature t opr ? 40 to + 150 ?c t stg 260 ?c t sol *2 *3 *1 *5 *6 power dissipation p d *4 *1 voltage between v in terminal and com terminal *2 voltage between v out terminal and com terminal *3 voltage between on/off control and com terminal *4 p d :with infinite heat sink *5 overheat protection may operate at the condition t j :125?c to 150?c *6 for 10s 1. facsimiles 2. printers 3. switching power supplies features applications low dissipation current at off-state chopper regulator 1. maximum switching current:1.5a 2. low dissipation current at off-state (i qs = max. 1 a) 3. built-in oscillation circuit (oscillation frequency:typ.100khz) 4. built-in overheat/overcurrent protection function 5. variable output voltage (output variable range:v ref to 35v/ ? v ref to ? 30v) [possible to select step-down output/inversing output according to external connection circuit] PQ1CZ21H2ZZ :sleeve-packaged product pq1cz21h2zp :tape-packaged product notice in the absence of confirmation by device specification sheets, sharp takes no responsibility for any defects that may occ ur in equipment using any sharp devices shown in catalogs, data books, etc. contact sharp in order to obtain the latest device specification sheets before usin g any sharp device. internet internet address for electronic components group http://www.sharp.co.jp/ecg/
pq1cz21h2z parameter symbol conditions v sat v ref ? v ref |r eg l| |r eg i| f o i l unit max. typ. min. ? ? ? ? ? ? ? ?? 1.235 80 0.8 1.5 2 1.55 i sw = 1a ? t j = 0 to 125 ? c i o = 0.2 to 1a v in = 8 to 35v i o = 1a ? 0.9 1.26 0.5 0.1 0.5 82 100 3 2 1.5 1.285 1.5 2.5 120 2.6 (unless otherwise specified, condition shall be v in = 12v, i o = 0.2a, v o = 5v, on-off terminal = 2.7v, ta=25 ? c) v v % % % % khz % v ?? 200 a ?? 2 a ?? 1 a ? 812ma a output saturation voltage reference voltage reference voltage temperature fluctuation load regulation line regulation efficiency oscillation frequency oscillation frequency temperature fluctuation overcurrent detecting level on threshold voltage stand-by current output off-state consumption current v in = 40v, terminal = 3v terminal = 0v, terminal terminal = 2.7v terminal = 0.4v v in = 40v, terminal = 0v ? f o t j = 0 to 125 ? c no l, c, d v th(on) i c (on) i c (off) i sd i qs output on control current output off control current 4 5 5 5 5 4 electrical characteristics power dissipation p d (w) 0 5 10 8 ? 40 ? 200 2040608085 ambient temperature t a ( c) p d : with infinite heat sink note) oblique line prtion:overheat protection may operate in this area output voltage v o (v) output current i o (a) 0 1 2 3 4 5 6 7 01234 0.5 1.5 2.5 3.5 t a = 25 c v in = 12v v o = 5v fig.2 power dissipation vs. ambient temperature fig.3 overcurrent protection characteristics (typical value) 12 l d 5 3 4 pq1cz21h2z r 1 r 2 i o i sd i qs i c (on) i c (off) v o c o c in v in + + 210 h 470 f 100 f 1k ? a v in a a load l : hk-14d100-2110 (made by toho co.) d :erc80-004 (made by fuji electronics co.) open high low 5 pin off on off output on/off control logic fig.1 standard test circuit
pq1cz21h2z fig.5 switching current vs. output saturation voltage fig.4 efficiency vs. input current fig.6 reference voltage fluctuation vs. junction temperature efficiency (%) input voltage v in (v) 50 60 70 80 90 100 0 10203040 v o = 12v, i o = 1a v o = 5v, i o = 0.2a t j = 25 c v o = 5v, i o = 1a v o = 12v, i o = 0.2a output saturation voltage v sat (v) 0 0.2 0.4 0.6 0.8 1 1.2 0 0.5 1 1.5 2 switching current i sw (a) t j = 25 c reference voltage fluctuation ? v ref (%) ? 2 ? 1 0 1 2 ? 50 ? 25 0 25 50 75 100 125 junction temperature t j ( c) v in = 12v v o = 5v fig.8 line regulation vs. input voltage fig.7 load regulation vs. output current load regulation r egl (%) output current i o (a) ? 0.5 0 0.5 1 0 0.2 0.4 0.6 0.8 1.2 1 t j = 25 ? c v in = 12v v o = 5v line regulation r egi (%) input voltage v in (v) ? 0.5 0 0.5 1 0 102030 15 25 35 540 t j = 25 c v o = 5v i o = 0.2a fig.9 oscillation frequency fluctuation vs. junction temperature oscillation frequency fluctuation ? f o (%) ? 10 ? 8 ? 6 ? 4 ? 2 0 2 ? 50 ? 25 0 25 50 75 100 125 junction temperature t j ( c) v in = 12v v o = 5v
pq1cz21h2z fig.10 overcurrent detection level fluctuation vs. junction temperature fig.12 operating consumption current vs. input voltage fig.11 on threshold voltage vs. junction temperature on threshold voltage v th (on) (v) 0 0.5 1 1.5 2 ? 50 0 50 100 150 ? 25 25 75 125 junction temperature t j ( c) v in = 12v overcurrent detecting level fluctuation ? i l (%) ? 8 ? 6 ? 4 ? 2 0 2 4 6 ? 50 junction temperature t j ( c) ? 25 0 25 50 75 100 125 operating consumptioon current iq' (ma) input voltage v in (v) 5 6 7 8 9 10 0 10203040 t j = 25 c v o = 5v i o = 0.2a no load i o = 1a fig.13 power dissipation vs. ambient temperature (typical value) power dissipation p d (w) 0 1 2 3 ? 40 ? 200 2040608085 ambient temperature t a ( c) cu area 740mm 2 cu area 180mm 2 cu area 100mm 2 cu area 70mm 2 cu area 36mm 2 material : glass-cloth epoxy resin size : 50 50 1.6mm cu thickness : 35 m pwb pwb cu
pq1cz21h2z fig.14 block diagram fig.15 step down type circuit diagram (5v output) voltage regulator osc. q s r overcurrent detection circuit overheat detection circuit on/ off _ + _ + f/f pwm comp. error amp. v ref 1 2 3 4 5 1 2 3 4 5 v in v out gnd (common to heat sink) o adj on/off control 12 l d 5 3 4 pq1cz21h2z r 1 r 2 v o 5v c o c in v in + + 210 h 470 f 100 f 8 to 35v 3k ? 1k ? on/off control signal load fig.16 polarity inversion type circuit diagram (-5v output) 1 2 l d 5 3 4 pq1cz21h2z r 1 r 2 c o c in v in v o ? 5v + + 130 h 2200 f 100 f 5 to 30v 3k ? 1k ? on/off control signal load
pq1cz21h2z precautions for use 1. external connection (1) wiring condition is very important. noise associated with wiring inductance may cause problems. for minimizing inductance, it is recommended to design the thick and short pattern (between large current diodos, input/output capacitors, and terminal 1,2.) single-point grounding (as indicated) should be used for best results. (2) high switching speed and low forward voltage type schottky barrier diode should be recommended for the catch-diode d because it affects the efficiency. please select the diode which the current rating is at least 1.2 times greater than maximum swiching current. (3) the output ripple voltage is highly influenced by esr(equivalent series resistor)of output capacitor, and can be minimized by selecting low esr capacitor. (4) an inductor should not be operated beyond its maximum rated current so that it may not saturate. (5) when voltage that is higher than v in , is applied to v out , there is the case that the device is broken. especially, in case v in is shorted to gnd in normal condition, there is the case that the device is broken since the charged electric charge in output capacitor (c o ) flows into input side. in such case a schottly barrier diode or a silicon diode shall be recommended to connect as the following circuit. 4 2 5 3 1 r 1 r 2 v o load l c o c in v in d pq1cz21h2z c-mos or ttl + + 12 pq1cz21h2z 1 2 1
pq1cz21h2z thermal protection design on/off control terminal 1. in the following circuit,when on/off control terminal becomes low by switching transistor t r on, output voltage may be turned off and the device becomes stand-by mode. dissipation current at stand-by mode becomes max.1 a. 2. on/off control terminal is compatible with ls-ttl. it enables to be directly drive by ttl or c-mos standard logic (rca4000 series). if on/off control terminal is not used, it is recommended to directly connect applicable terminals with input terminal. 12 l d 5 3 4 pq1cz21h2z c-mos or ttl r 1 r 2 i o c o c in v in v o + + load 5 5 internal power dissipation(p)of device is generally obtained by the following equation. when ambient temperature ta and power dissipation p d (max)during operation are determined, use cu plate which allows the element to operate within the safety operation area specified by the derating curve. insufficient radiation gives an unfavorab le influence to the normal operation and reliability of the device. p=i sw (average.) v sat d' + v in (voltage between v in to com terminal) i q '(consumption current) step down type d'(duty)= = i sw (average)= i o (output current.) t on t(period) v o +v f v in v sat +v f polarity inversion type d'(duty)= = i sw (average)= i o (output current.) t on t(period) 1 1 d' |v o |+v f v in +|v o | v sat +v f v f : forward voltage of the diode
115 application circuits notice l the circuit application examples in this publication are provided to explain representative applications of sharp devices and are not intended to guarantee any circuit design or license any intellectual property rights. sharp takes no responsibility for any problems related to any intellectual property right of a third party resulting from the use of sharp's devices. l contact sharp in order to obtain the latest device specification sheets before using any sharp device. sharp reserves the right to make changes in the specifications, characteristics, data, materials, structure, and other contents described herein at any time without notice in order to improve design or reliability. manufacturing locations are also subject to change without notice. l observe the following points when using any devices in this publication. sharp takes no responsibility for damage caused by improper use of the devices which does not meet the conditions and absolute maximum ratings to be used specified in the relevant specification sheet nor meet the following conditions: (i) the devices in this publication are designed for use in general electronic equipment designs such as: --- personal computers --- office automation equipment --- telecommunication equipment [terminal] --- test and measurement equipment --- industrial control --- audio visual equipment --- consumer electronics (ii)measures such as fail-safe function and redundant design should be taken to ensure reliability and safety when sharp devices are used for or in connection with equipment that requires higher reliability such as: --- transportation control and safety equipment (i.e., aircraft, trains, automobiles, etc.) --- traffic signals --- gas leakage sensor breakers --- alarm equipment --- various safety devices, etc. (iii)sharp devices shall not be used for or in connection with equipment that requires an extremely high level of reliability and safety such as: --- space applications --- telecommunication equipment [trunk lines] --- nuclear power control equipment --- medical and other life support equipment (e.g., scuba). l contact a sharp representative in advance when intending to use sharp devices for any "specific" applications other than those recommended by sharp or when it is unclear which category mentioned above controls the intended use. l if the sharp devices listed in this publication fall within the scope of strategic products described in the foreign exchange and foreign trade control law of japan, it is necessary to obtain approval to export such sharp devices. l this publication is the proprietary product of sharp and is copyrighted, with all rights reserved. under the copyright laws, no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, in whole or in part, without the express written permission of sharp. express written permission is also required before any use of this publication may be made by a third party. l contact and consult with a sharp representative if there are any questions about the contents of this publication.
|
