 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| KA3882/3/4/5 SMPS CONTROLLER CURRENT MODE PWM CONTROLLER The KA3882/3/4/5 are fixed PWM controller for Off-Line and DC to DC converter applications. The internal circuits include UVLO, low start up current circuit, temperature compensated reference, high gain error amplifier, current sensing comparator, and high current totempole output for driving a POWER MOSFET. Also KA 3882/3/4/5 provide low start up current below 0.3mA and short shutdown delay time typ. 100ns. The KA3882 and KA3884 have UVLO threshold of 1 6V(on) and 10V(off). The KA3883 and KA3885 are 8.4V(on) and 7.6V(off). The KA3882 and KA3883 can operate within 100% duty cycle. The KA3884 and KA3885 within 50% by using T Flip-Flop. 8 DIP 8 SOP FEATURES * * * * * * * Low Start Current 0.2mA (typ) Operating Range Up To 500KHz Cycle by Cycle Current Limiting Under Voltage Lock Out With Hysteresis Short Shutdown Delay Time: typ.100ns High Current Totempole Output Output Swing Limiting: 22V ORDERING INFORMATION Device KA388X KA388XD Package 8 DIP 8 SOP Operating Temperature 0 ~ + 85I 0 ~ + 85I BLOCK DIAGRAM Rev. B (c)1999 Fairchild Semiconductor Corporation KA3882/3/4/5 SMPS CONTROLLER ABSOLUTE MAXIMUM RATINGS Characteristic Supply Voltage Output Current Analog Inputs (pin 2, 3) Error Amp. Output Sink Current Power Dissipation Symbol VCC IO VI(ANA) ISINK(EA) PD Value 30 +1 - 0.3 to 6.3 10 1 Unit V A V mA W ELECTRICAL CHARACTERISTICS (VCC = 15V, RT = 10K, CT = 3.3nF, T A = 0Ito + 85I, Unless otherwise specified) Characteristic REFERENCE SECTION Output Voltage Line Regulation Load Regulation Output Short Circuit OSILLATOR SECTION Initial Accuracy Voltage Stability Amplitude Discharge Current CURRENT SENSE SECTION Gain Maximum Input Signal PSRR Input Bias Current Delay to Output GV VI(MAX) PSRR IBIAS TD (NOTE 2, 3) VPIN1 = 5V(NOTE 2) VCC = 12V to 25V (NOTE 1, 2) 2.85 0.9 3 1.0 70 -2 100 3.15 1.1 V/V V dB uA ns FOSC ST V VOSC IDISCHG T J = 25I VCC = 12V to 25V VPIN4, Peak to Peak T J = 25I, Pin4 = 2V 47 Symbol Test Conditions Min Typ Max Unit LV LV VREF REF REF T J = 25I, IO = 1mA VCC = 12V to 25V IO = 1mA to 20mA T a = 25I 4.9 ISC i i i 5.0 6 6 - 100 52 0.2 1.7 8.3 5.1 20 25 - 180 57 V mV mV mA KHz % V mA i i i 8.8 1 7.8 i VPIN3 = 0V to 2V (NOTE1) i i i i -10 200 KA3882/3/4/5 SMPS CONTROLLER ELECTRICAL CHARACTERISTICS(Continued) (VCC = 15V, RT = 10K, CT = 3.3nF, T A = 0Ito + 85I, Unless otherwise specified) Characteristic ERROR AMPLIFIER SECTION Input Voltage Input Bias Current Open Loop Gain Unity Gain Bandwidth PSRR Output Sink Current Output Source Current Output High Voltage Output Low Voltage OUTPUT SECTION ISINK = 20mA Output Low Level Output High Level Rise Time Fall Time Output Voltage Swing Limit UNDER VOLTAGE LOCKOUT SECTION Start Threshold Min.Operating Voltage ( After turn on ) VTH VTL KA3882/4 KA3883/5 KA3882/4 KA3883/5 15 7.8 9 7.0 16 8.4 10 7.6 17 9.0 11 8.2 V V V V VOL VOH tR tF VOLIM ISINK = 200mA ISOURCE = 20mA ISOURCE = 200mA T J = 25I, C1 = 1nF (NOTE 1) T J = 25I, C1 = 1nF (NOTE 1) VCC = 27V, C1 = 1nF VI IBIAS GVO GBW PSRR ISINK ISOURCE VOH VOL (NOTE 1) T J= 25I (NOTE 1) VCC = 12V to 25V (NOTE 1) VPIN2 = 2.7V VPIN1 = 1.1V VPIN2 = 2.3V VPIN1 = 5.0V VPIN2 = 2.3V R1 = 15K to GND VPIN2 = 2.7V R1 = 15K to Pin8 T PIN1 = 2.5V Symbol Test Conditions Min Typ Max Unit i 2.42 i 2.50 -0.3 90 1 70 6 -0.8 6 0.8 2.58 -2 V uA dB MHz dB mA mA V V VO = 2V to 4V 65 0.7 60 2 -0.5 5 i i i i i i 1.1 i i i 13 12 0.1 1.5 13.5 13.5 40 40 22 0.4 2.2 V V V V ns ns V i i i i i 100 100 i KA3882/3/4/5 SMPS CONTROLLER ELECTRICAL CHARACTERISTICS(Continued) (VCC = 15V, RT = 10K, CT = 3.3nF, T A = 0Ito +85I, unless otherwise specified) Characteristic PWM SECTION KA3882/3 Maximum Duty Cycle Minimum Duty Cycle TOTAL STANDBY CURRENT Start-Up Current Operating Supply Current VCC Zener Voltage IST ICC VZ ICC = 25mA DMAX DMIN KA3884/5 94 96 48 100 50 0 0.4 17 % % % mA mA V 47 Symbol Test Conditions Min Typ Max Unit i i i i VPIN2 = VPIN3 = 0V VCC above the start threshold bifore setting at 15V NOTE 1. These parameters, although guaranteed, are not 100% tested in production. 2. Parameter measured at trip point of latch with V2 = 0V. 3. Gain defined as: GV = PIN1 PIN3(VPIN3 = 0 to 0.8V) Adjust i i i 0.2 11 29 i LV LV TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACExTM CoolFETTM CROSSVOLTTM E2CMOSTM FACTTM FACT Quiet SeriesTM FAST(R) FASTrTM GTOTM HiSeCTM DISCLAIMER ISOPLANARTM MICROWIRETM POPTM PowerTrenchTM QSTM Quiet SeriesTM SuperSOTTM-3 SuperSOTTM-6 SuperSOTTM-8 TinyLogicTM UHCTM VCXTM FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life support device or system whose failure to perform can systems which, (a) are intended for surgical implant into be reasonably expected to cause the failure of the life the body, or (b) support or sustain life, or (c) whose support device or system, or to affect its safety or failure to perform when properly used in accordance with instructions for use provided in the labeling, can be effectiveness. reasonably expected to result in significant injury to the user. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. Preliminary First Production No Identification Needed Full Production Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only. |
Price & Availability of KA3882
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |