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| Chopper Regulators PQ1CF2 PQ1CF2 TO-220 Package Chopper Regulator s Features Maximum switching current : 1.5A Built-in ON/OFF control function Built-in soft start function Built-in oscillation circuit (oscillation frequency : TYP.100kHz) Built-in overheat protection, overcurrent protection function TO-220 package Variable output voltage (1.26 to 35V/-1.26 to-30V) [Possible to choose step down output/inversing output according to external connection circuit] s Outline Dimensions (Unit : mm) 10.2MAX 3.20.1 7.40.2 3.60.2 4.50.2 2.80.2 (24.6) PQ1CF2 (1.5) 2.0 5.00.5 5-0.80.1 (0.5) 3.20.5 s Applications Switching power supplies Facsimiles Printers Personal computers 4-(1.7) (5.0) 8.20.7 1q 3q 5 q 2q 4q 1 VIN 2 VOUT 3 COM 4 OADJ 5 ON/OFF control terminal (VC) s Absolute Maximum Ratings Parameter *1 (Ta=25C) Symbol VIN VADJ Vi-o VOUT VC ISW PD1 PD2 Tj Topr Tstg Tsol Rating Unit 40 V 7 V 41 V -1 V -0.3 to 40 V 1.5 A 1.5 W 15 W 150 C -20 to +80 C -40 to +150 C 260 (For 10s) C *2 *3 *4 Input voltage Error input voltage Input-output voltage Output-COM voltage ON/OFF control valtage Switching current Power dissipation (No heat sink) Power dissipation (With infinite heat sink) Junction temperature Operating temperature Storage temperature Soldering temperature Voltage between VIN terminal and COM terminal. Voltage between VOUT terminal and COM terminal. Voltage between VC terminal and COM terminal. Overheat protection may operate at 125= * Please refer to the chapter" Handling Precautions ". " 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 version of the device specification sheets before using any SHARP's device. " 4.4MIN 16.40.7 Chopper Regulators s Electrical Characteristics Parameter Output saturation voltage Reference voltage Temperature fluctuation in reference voltage 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 consump-tion current PQ1CF2 (Unless otherwise specified, conditions shall be VIN=5V, IO=2.5A, VO=3V[R1=2k]Ta=25C) Symbol Vsat Vref Vref |RegL| |RegI| fo fo DMAX IL ICHG VTHL VTHH VTHON ISD Iqs Conditions IO=1A,No L,D,CO Tj=0 to 125C IO=0.2 to 1A VIN=8 to 35V IO=1A Tj=0 to 125C 4 terminal is open No L,D,CO 24 terminal is open Duty=0%, 4terminal=0V, 5terminal Duty=DMAX, 4terminal is open. 5terminal 4terminal=0V,5terminal VIN=40V, 4terminal=0V VIN=40V, 5terminal=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 2.0 -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 A V V V A mA s Block Diagram 1 VIN 2 VOUT Voltage regulator ON/OFF circuit 5 ON/OFF PWM COMP. Overcurrent detection circuit F/F Q R S Oscillator Soft start + - 4 OADJ + - Vref Overheat detection circuit 3 COM Fig.2 20 Power Dissipation vs. Ambient Temperature PD1 :No heat sink PD2 :With infinite heat sink PD2 Fig.1 Test Circuit 4 q ISD IQS VIN CIN 100F 1 q A + + Load 2 q PQ1CF2 5 q 3 q L 2.2nF 210H R2 D R1 1k IO VO 15 A ICHG CO 470F 10 5 L : HK-14D100-2110 (made by Toho Co.) D : ERC80-004 (made by Fuji electronics Co.) PD1 0 -20 0 20 40 60 80 100 Ambient temperature Ta (C) Note) Oblique line portion : Overheat protection may operate in this area. ,, ,, ,, ,, Power dissipation PD (W) Chopper Regulators s Step Down Type Circuit Diagram (5V output) PQ1CF2 VIN 8 to 35V RS D R1 1k CIN 100F CS CO 470F ON/OFF control RS=<50k s Polarity Inversion Type Circuit Diagram (-5V output) VIN 5 to 30V RS D R1 1k CIN 100F CS CO 2200F ON/OFF control VO=-5V RS=<50k Load + 4 q 1 q 2 q PQ1CF2 5 q 3 q L 130H R2 3k + Load + 4 q 1 q 2 q PQ1CF2 5 q 3 q L 210H R2 3k VO=5V + |
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