Chopper Regulators PQ1CZ1 PQ1CZ1 Surface Mount Type Chopper Regulator ■ ■ Features Surface mount type package (equivalent to SC-63, 5-terminal type) ● Variable output voltage (Vref to 35V/–Vref to –30V) ● Built-in ON/OFF control function ● Built-in overheat protection function and overcurrent protection function ● Built-in soft start function (Unit : mm) Outline Dimensions ● 5.2±0.5 (0.5) 1CZ1 (1.7) 5.5±0.5 9.7MAX 3 Personal computers ● Word processors ● Printers ● Car audio equipment ● (0.9) 0.5 +0.2 –0.1 Applications 2.5MIN ■ 2.3±0.5 6.6MAX 4–(1.27) (0.5) ( ):Typical values 1 2 3 1 2 3 4 5 ■ Absolute Maximum Ratings 4 5 VIN VOUT COM(equivalent to heat sink) OADJ VC (Ta=25˚C) Parameter Symbol Rating Unit ❇1 Input voltage VIN 40 V VADJ Error input voltage 7 V Vi-O Input-output voltage 41 V ISW Switching current 1.5 A ❇2 Voltage between output and COM VOUT –1 V ❇3 ON/OFF control voltage VC –0.3 to 40 V ❇4 Power dissipation PD 8 W Tj Junction temperature 150 ˚C Topr Operating temperature –20 to +80 ˚C Tstg Storage temperature –40 to +150 ˚C Tsol Soldering temperature 260(For 10s) ˚C ❇1 ❇2 ❇3 ❇4 Voltage between VIN terminal and COM terminal. Voltage between VOUT terminal and COM terminal. Voltage between Vc terminal and COM terminal. With infinite heat sink, Refer to Fig.1 • Please refer to the chapter " Handling Precautions ". Notice In the absence of confirmation by device specification sheets,SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in catalogs,data books,etc.Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device. Internet Internet address for Electronic Components Group http://sharp-world.com/ecg/ Chopper Regulators ■ PQ1CZ1 Electrical Characteristics (Unless otherwise specified, condition shall be VIN=12V, Io=0.2A, Vo=5V, 5 terminal is open, Ta=25˚C) Parameter Output saturation voltage Reference voltage Reference voltage temperature fluctuation Load regulation Line regulation Efficiency Oscillation frequency Oscillation frequency temperature fluctuation Maximum duty Overcurrent detecting level Charge current Input threshold voltage ON threshold voltage Stand-by current Output OFF-state dissipation current Symbol VSAT Vref ∆Vref |RegL| |RegI| η fo ∆fo DMAX IL ICHG VTHL VTHH VTH(ON) ISD Iqs Conditions Io=1A, no L,D,CO –– Tj=0 to 125˚C IO=0.2 to 1A VIN=8 to 35V IO=1A –– Tj=0 to 125˚C 4 terminal = open No L,D,CO 2 , 4 terminals are open Duty=0%, 4 terminal =OV, 5 terminal Duty=DMAX, 4 terminal is open., 5 terminal 4 terminal=0V, 5 terminal VIN=40V, 5 terminal =0V VIN=40V, 4 terminal =3V MIN. –– 1.235 –– –– –– –– 80 –– 90 1.55 –15 1.95 3.25 1.05 –– –– TYP. 0.9 1.26 ±0.5 0.1 0.5 82 100 ±2 –– 2 –10 2.25 3.55 1.4 150 8 MAX. 1.5 1.285 –– 1.5 2.5 –– 120 –– –– 2.6 –5 2.55 3.85 1.75 400 12 Unit V V % % % % kHz % % A µA V V µA mA Fig. 1 Test Circuit L 210µH 4 ISD Iqs 1 A 2 D 5 + R2 IO + 3 CIN 100µF VIN A ICHG VO R1 Road CO 1kΩ 2.2nF 470µF R2 Output voltage [VO]=Vref × 1+ –– V R1 L : HK-HK-14D100-2110(made by Toho Co.) D : ERC80-004(made by Fuji electronics Co.) Fig. 2 Power Dissipation vs. Ambient Temperature Fig. 3 Overcurrent Protection Characteristics (Typical Value) PD : With infinite heat sink 7 5 Tj=25˚C 6 PD Output voltage Vo (V) Power dissipation PD (W) 10 5 VIN=12V Vo=5V CIN=100µF Co=470µF L=210µH 4 3 2 1 0 –20 Note) 0 0 20 40 60 80 100 Ambient temperature Ta (˚C) Oblique line portion : Overheat protection may operate in this area. 0 0.5 1 1.5 2 2.5 3 Output current Io (A) 3.5 4 Chopper Regulators Fig. 4 PQ1CZ1 Efficiency vs. Input Voltage Fig. 5 Switching Current vs. Output Saturation Voltage 100 Tj=25˚C VO=12V, IO=1.0A Switching current ISW (A) Tj=25˚C Efficiency η (%) 90 80 VO=12V, IO=0.2A 70 VO=5V, IO=1.0A 60 VO=5V, IO=0.2A 2.0 1.5 1.0 0.5 0 50 0 Fig. 6 10 20 30 Input voltage VIN (V) 40 Stand-by Current vs. Input Voltage 0 Fig. 7 0.5 1.0 1.5 Output saturation voltage VSAT (V) Reference Voltage Fluctuation vs. Junction Temperature 2 VIN=12V Vo=5V Reference voltage fluctuation ∆VREF (%) Stand-by current ISD (µA) Tj=25˚C 200 150 100 50 15 20 25 30 35 Input voltage VIN (V) 40 Load Regulation vs. Output Current 1 Load regulation RegL (%) 10 0 25 50 75 100 125 Junction temperature Tj (˚C) Line Regulation vs. Input Voltage 1 Tj=25˚C VIN=12V Vo=5V CIN=100µF CO=470µF L=210µH 0.5 –1 Fig. 9 Line regulation RegI (%) Fig. 8 5 0 –2 –25 0 0 1 0 –0.5 Tj=25˚C, Io=0.2A Vo=5V, CIN=100µF CO=470µF, L=210µH 0.5 0 –0.5 0 0.2 0.4 0.6 0.8 Output current IO (A) 1 0 5 10 15 20 25 30 Input voltage VIN (V) 35 40 Chopper Regulators PQ1CZ1 Oscillation frequency fluctuation (%) 5 VIN=12V Vo=5V 4 3 2 1 0 –1 –2 –3 –4 –5 –25 0 25 50 75 100 125 Junction temperature Tj (˚C) Fig.12 Threshold Voltage vs. Junction Temperature 15 10 5 0 –5 –10 –15 –25 0 25 50 75 100 Junction temperature Tj (˚C) 4.5 10 VIN=12V 4 VTHH 3.5 3 VTHL 2.5 2 VTH(ON) 1.5 1 0.5 –50 –25 0 25 50 75 100 125 Junction temperature Tj (˚C) Io=0.2A 9 7 No load 6 5 0 10 20 30 Input voltage VIN (V) Power dissipation PD (W) 3 Cu area 740mm2 2 PWB 1 Cu area 100mm2 Cu area 70mm2 PWB Cu Cu area 36mm2 Material : Glass-cloth epoxy resin Size : 50 X 50 X 1.6mm Cu thickness : 35µm 0 –20 0 20 40 60 80 100 Ambient temperature Ta (˚C) Tj=25˚C Vo=5V Io=1A 8 Fig.14 Power Dissipation vs. Ambient Temperature (Typical Value) Cu area 180mm2 125 Fig.13 Operating Dissipation Current vs. Input Voltage Operating dissipation current IQ' (mA) Threshold voltage VTH(ON), VTHL, VTHH (V) Fig.11 Overcurrent Detecting Level Fluctuation vs. Junction Temperature Overcurrent detecting level fluctation (%) Fig.10 Oscillation Frequency Fluctuation vs. Junction Temperature 40 Chopper Regulators ■ PQ1CZ1 Block Diagram 1 VIN Voltage regulator 5 ON/OFF 4 OADJ + Oscillation –– Soft start – F/F VOUT ON/OFF circuit PWM COMP Q Over current detecting circuit 2 R S – + ERROR AMP. Vref Over current detecting circuit 3 ■ COM Step Down Type Circuit Diagram (5V output) 4 L 210 µH 2 1 VO=5V R2 3kΩ 5 VIN 8~35V + RS D + CO 470µF 3 CIN 100µF R1 1kΩ Load PQ1CZ1 CS RS<=50kΩ ON/OFF control signal Polarity Inversion Type Circuit Diagram (–5V output) 4 L 130µH 2 1 PQ1CZ1 R2 3kΩ 5 VIN 5 to 30V + RS CIN 100µF D 3 R1 1kΩ + CO 2200µF Load ■ CS RS<=50kΩ ON/OFF control signal VO=–5V Chopper Regulators ■ PQ1CZ1 External Connection 4 L 1 VO 2 5 R2 + + 3 VIN Load CS CIN D CO R1 q w e r t ■ 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. When output voltage is not stable, it can be improved by attaching capacitor(from several nF to several dozens nF)to external resistor R2. 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. The output ripple voltage is highly influenced by ESR(Equivalent Series Resistor)of output capacitor, and can be minimized by selecting Low ESR capacitor. An inductor should not be operated beyond its maximum rated current so that it may not saturate. Thermal Protection Design Internal power dissipation(P)of device is generally obtained by the following equation. P=ISW(Average.) x VSATxD' + VIN(voltage between VIN to COM terminal) x Iq'(consumption current) Step down type –––––––––––––– Ton VO+VF ––––––––––––– D'(Duty)= –––––––– T(period)= VIN–VSAT+VF ISW(Average)= IO(Output current.) Polarity inversion type –––––––––––––––––––– Ton |VO|+VF D'(Duty)= –––––––– = –––––––––––––––––––– T(period) VIN+|VO|–VSAT+VF 1 ISW(Average)= –––––––– x IO(Output current.) 1–D' VF : Forward voltage of the diode When ambient temperature Ta and power dissipation PD(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 unfavorable influence to the normal operation and reliability of the device. Chopper Regulators PQ1CZ1 In the external area of the safety operation area shown by the derating curve, the overheat protection circuit may operate to shut-down output. However, please avoid keeping such condition for a long time. ON/OFF Control Terminal In the following circuit,when ON/OFF control terminal t becomes low by switching transistor Tr on, output voltage may be turned OFF and the device becomes stand-by mode. Dissipation current at stand-by mode becomes Max.400µA. <Soft start> When capacitor Cs is attached, output pulse gradually expanded and output voltage will start softly. <ON/OFF control with soft startup> For ON/OFF control with capacitor CS, be careful not to destroy a transistor Tr by discharge current from CS, adding a resistor restricting discharge current of CS. 4 L 1 IO 2 VO 5 R2 + + 3 VIN Load CS D CIN CO R1 Tr ON/OFF control signal Step Down Voltage Circuit (V) ON/OFF terminal voltage ■ Duty DMAX 3.55 (VTHH) 2.25 (VTHL) Duty 0% 1.4 (VTHON) 0 1 2 3 time 1 Stand-by mode 2 OFF-state 3 Soft start NOTICE ● 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. ● 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. ● 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). ● 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. ● 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. ● 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. ● Contact and consult with a SHARP representative if there are any questions about the contents of this publication.