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| SP433 Constant Voltage and Constant Current Controller DESCRIPTION The SP433 is high-voltage four-terminal adjustable voltage references, with over current protection feature. The SP433 is a one chip solution to a 2.5V precision voltage reference and constant current output in the application of secondary feedback control of power supply, DC/DC converter, adaptor and charger. SP433 is idea for low cost switching power supply application. APPLICATIONS Battery Charger Battery Power Equipment Linear Regulators Switch Power Supply Cellular Phone Digital Cameras Computer Disk Drivers Instrumentation FEATURES Voltage Reference Accuracy of 0.5% & 1.0% Sink Current Capability from 1mA to 100mA Adjustable Output Voltage from VREF to 18V Low Output Noise Typical Output Dynamic Impedance Less Than 200m Available in SOT-23-5L and TO-94 package Over Current Protection PIN CONFIGURATION TO-94 SOT-23-5L PART MARKING TO-94 SOT-23-5L 2009/03/16 Ver.1 Page 1 SP433 Constant Voltage and Constant Current Controller TYPICAL APPLCATION CIRCUIT PIN DESCRIPTION ( TO-94 ) Pin 1 2 3 4 PIN DESCRIPTION ( SOT-23-5L ) Pin 1 2 3 4 5 Symbol P NC ANODE REF CATHODE Description CURRENT ENABLE NC ANODE REF CATHODE Symbol R A C P Description REF ANODE CATHODE CURRENT ENABLE ORDERING INFORMATION Part Number Voltage Tolerance Package SP433AS25RGB 0.5% SOT-23-5L SP433BS25RGB 1.0% SOT-23-5L SP433AT94AGB 0.5% TO-94 SP433BT94AGB 1.0% TO-94 Week Code : A ~ Z ( 1 ~ 26 ) ; a ~ z ( 27 ~ 52 ) SP433AS25RGB : Tape Reel ; Pb - Free ; Halogen -Free SP433BS25RGB : Tape Reel ; Pb - Free ; Halogen -Free SP433AT94AGB : Tape Ammo ; Pb-Free ; Halogen -Free SP433BT94AGB : Tape Ammo ; Pb-Free ; Halogen -Free Part Marking 33AYW 33BYW SP433 SP433 2009/03/16 Ver.1 Page 2 SP433 Constant Voltage and Constant Current Controller BLOCK DIAGRAM ABSOULTE MAXIMUM RATINGS (TA=25 Unless otherwise specified) Parameter Cathode Voltage Continuous Cathode Current Range Reference Current Range Operating Junction Temperature Range Storage Temperature Range Lead Temperature Range (Soldering 10Sec) Thermal Resistance Symbol VZ IZ IREF TJ TSTG TSOL JA Value 18 150 10 -40 ~ +150 -65 ~ +150 260 140 Unit V mA mA /W The IC has a protection circuit against static electricity. Do not apply high static electricity or high voltage that exceeds the performance of the protection circuit to the IC. 2009/03/16 Ver.1 Page 3 SP433 Constant Voltage and Constant Current Controller ELECTRICAL CHARACTERISTICS (TA=25 , Unless otherwise specified) Parameter Reference Input Voltage (IK=10mA,VZ=VREF) VREF Temp Deviation Ratio Of Change In REF To Change In Cathode Voltage Reference Input Current IREF Temp Deviation Off-State Cathode Current Dynamic Output Impedance Minimum Operating Current Current Amplification Saturation Voltage Maximum Protection Current Symbol VREF VDEV VREF/ VZ IREF IREF(DEV) IZ(OFF) RZ Iz(MIN) Iamp Vsat IP Conditions SP433A SP433B TA=-40~+80 VZ=VREF IZ=10mA IZ=10mA, VZ = 18V~VREF IZ=10mA R1=10K R2= TA=-40~+80 R1=10K , R2= IZ=10mA VREF=0V , VZ=18V f<1kHz , VZ=VREF IZ=1mA~100mA VZ=VREF VC=1V, IA=50uA Ic=150mA, IA=10mA 10 0.8 100 1.0 Min 2.487 2.475 Typ 2.5 2.5 10 -1.4 Max 2.513 2.525 25 -2.7 1 2.5 0.1 1.5 1.0 Units V mV mV/V uA uA uA mA mA V mA 2009/03/16 Ver.1 Page 4 SP433 Constant Voltage and Constant Current Controller APPLICATION NOTE In the above application, SP433 is used to provide an accurate control of voltage and current. The voltage loop is controlled through an internal error amplifier, the resistor bridge R1, R2 and the photo-coupler. The relation between Vout, R1, R2 and Vref is shown in: Vout = Vref x (1+R1/R2) The current loop is controlled through an internal transistor, the sense resistor and the photo-coupler. The control equation is: Risense X I-limit = 0.7V (typical) Where I-limit is the desired current limit. The selection of Risense should consider the power loss through Risense. It is calculated as: P-limit = 0.7 X I-limit Whether AC input is at High Line or Low Line, SP433 can provide the same current protection. It has the fuse function at the output. 2009/03/16 Ver.1 Page 5 SP433 Constant Voltage and Constant Current Controller PERFORMANCE CHARACTERISTICS 2009/03/16 Ver.1 Page 6 SP433 Constant Voltage and Constant Current Controller PERFORMANCE CHARACTERISTICS 2009/03/16 Ver.1 Page 7 SP433 Constant Voltage and Constant Current Controller SOT-23-5L PACKAGE OUTLINE 2009/03/16 Ver.1 Page 8 SP433 Constant Voltage and Constant Current Controller TO-94 PACKAGE OUTLINE 2009/03/16 Ver.1 Page 9 SP433 Constant Voltage and Constant Current Controller Information provided is alleged to be exact and consistent. SYNC Power Corporation presumes no responsibility for the penalties of use of such information or for any violation of patents or other rights of third parties which may result from its use. No license is granted by allegation or otherwise under any patent or patent rights of SYNC Power Corporation. Conditions mentioned in this publication are subject to change without notice. This publication surpasses and replaces all information previously supplied. SYNC Power Corporation products are not authorized for use as critical components in life support devices or systems without express written approval of SYNC Power Corporation. (c)The SYNC Power logo is a registered trademark of SYNC Power Corporation (c)2004 SYNC Power Corporation - Printed in Taiwan - All Rights Reserved SYNC Power Corporation 7F-2, No.3-1, Park Street NanKang District (NKSP), Taipei, Taiwan 115 Phone: 886-2-2655-8178 Fax: 886-2-2655-8468 (c)http://www.syncpower.com 2009/03/16 Ver.1 Page 10 |
Price & Availability of SP433AT94AGB
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