SP433 SYNC-POWER | Alldatasheet
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Technical content
2009/03/16 Ver.1 Page 1 SP433 Constant Voltage and Constant Current Controller DESCRIPTION APPLICATIONS z Battery Charger z Battery Power Equipment z Linear Regulators z Switch Power Supply z Cellular Phone z Digital Cameras z Computer Disk Drivers z Instrumentation
FEATURES
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. z V oltage Reference Accuracy of 0.5% & 1.0% z Sink Current Capability from 1mA to 100mA z Adjustable Output V oltage from VREF to 18V z Low Output Noise z Typical Output Dynamic Impedance Less Than 200mΩ z Available in SOT-23-5L and TO-94 package z Over Current Protection PIN CONFIGURATION TO-94 SOT-23-5L PART MARKING TO-94 SOT-23-5L
2009/03/16 Ver.1 Page 2 SP433 Constant Voltage and Constant Current Controller TYPICAL APPLCATION CIRCUIT PIN DESCRIPTION ( TO-94 ) Pin Symbol Description
1 R REF
2 A ANODE
3 C CATHODE
4 P CURRENT ENABLE
PIN DESCRIPTION ( SOT-23-5L ) Pin Symbol Description
1 P CURRENT ENABLE
2 NC NC
3 ANODE ANODE
4 REF REF
5 CATHODE CATHODE
ORDERING INFORMATION
Part Number Voltage Tolerance Package Part Marking SP433AS25RGB 0.5% SOT-23-5L 33AYW SP433BS25RGB 1.0% SOT-23-5L 33BYW SP433AT94AGB 0.5% TO-94 SP433 SP433BT94AGB 1.0% TO-94 SP433 ※ 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
2009/03/16 Ver.1 Page 3 SP433 Constant Voltage and Constant Current Controller BLOCK DIAGRAM ABSOULTE MAXIMUM RATINGS A=25 Unless otherwise specified)℃ Parameter Symbol Value Unit Cathode V oltage V Z 18 V Continuous Cathode Current Range I Z 150 mA Reference Current Range I REF 10 mA Operating Junction Temperature Range T J -40 ~ +150 ℃ Storage Temperature Range T STG -65 ~ +150 ℃ Lead Temperature Range (Soldering 10Sec) T SOL 260 ℃ Thermal Resistance ӨJA 140 ℃/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 4 SP433 Constant Voltage and Constant Current Controller
ELECTRICAL CHARACTERISTICS
(TA=25℃ , Unless otherwise specified) Parameter Symbol Conditions Min Typ Max Units Reference Input V oltage (IK=10mA,VZ=VREF) VREF SP433A SP433B 2.487 2.475 2.5 2.5 2.513 2.525 V VREF Temp Deviation V DEV TA=-40℃~+80℃ VZ=VREF IZ=10mA 10 25 mV Ratio Of Change In REF To Change In Cathode V oltage V△ REF/ V△ Z IZ=10mA, V△ Z = 18V~VREF -1.4 -2.7 mV/V Reference Input Current I REF IZ=10mA R1=10KΩ R2=∞ 1 uA IREF Temp Deviation I REF(DEV) TA=-40℃~+80℃ R1=10KΩ , R2=∞ IZ=10mA 2.5 uA Off-State Cathode Current I Z(OFF) V REF=0V , VZ=18V 0.1 uA Dynamic Output Impedance R Z f<1kHz , VZ=VREF IZ=1mA~100mA 1.0 1.5 Ω Minimum Operating Current I z(MIN) V Z=VREF 1.0 mA Current Amplification Iamp V C=1V , IA=50uA 10 mA Saturation V oltage Vsat Ic=150mA, I A=10mA 0.8 V Maximum Protection Current I P 100 mA
2009/03/16 Ver.1 Page 5 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: V out = 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: R isense 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 6 SP433 Constant Voltage and Constant Current Controller PERFORMANCE CHARACTERISTICS
2009/03/16 Ver.1 Page 7 SP433 Constant Voltage and Constant Current Controller PERFORMANCE CHARACTERISTICS
2009/03/16 Ver.1 Page 8 SP433 Constant Voltage and Constant Current Controller SOT-23-5L PACKAGE OUTLINE
2009/03/16 Ver.1 Page 9 SP433 Constant Voltage and Constant Current Controller TO-94 PACKAGE OUTLINE
2009/03/16 Ver.1 Page 10 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 pate nt or patent rights of SYNC Power Corporation. Conditions mentioned in this publication ar e subject to change without notice. This p ublication 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. ©The SYNC Power logo is a registered trademark of SYNC Power Corporation ©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 ©http://www.syncpower.com