KA3882/3/4/5 SMPS CONTROLLER CURRENT MODE PWM CONTROLLER 8 DIP 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 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 Package KA388X 8 DIP Operating Temperature 0 ~ + 85 KA388XD 8 SOP 0 ~ + 85 Î Î BLOCK DIAGRAM Rev. B ©1999 Fairchild Semiconductor Corporation KA3882/3/4/5 SMPS CONTROLLER ABSOLUTE MAXIMUM RATINGS Symbol Value Unit Supply Voltage Characteristic VCC 30 V Output Current IO +1 A Analog Inputs (pin 2, 3) VI(ANA) - 0.3 to 6.3 V Error Amp. Output Sink Current ISINK(EA) 10 mA PD 1 W Power Dissipation ELECTRICAL CHARACTERISTICS `, C (VCC = 15V, RT = 10K T Îto + 85Î, Unless otherwise specified) = 3.3nF, T A = 0 Characteristic Symbol REFERENCE SECTION Output Voltage Line Regulation Load Regulation Output Short Circuit VREF LV LV Test Conditions Min Typ Max Î, I 4.9 5.0 5.1 V 6 20 mV T J = 25 O = 1mA REF VCC = 12V to 25V REF IO = 1mA to 20mA Î ï ï ï 6 25 mV - 100 - 180 mA 52 57 KHz 0.2 1 ï % 1.7 8.3 8.8 mA 2.85 3 3.15 V/V 0.9 1.0 1.1 V 70 ï dB -2 -10 uA 100 200 ns ISC T a = 25 Initial Accuracy FOSC T J = 25 Voltage Stability ST V VCC = 12V to 25V Amplitude VOSC VPIN4, Peak to Peak ï ï T J = 25 7.8 (NOTE 2, 3) VPIN1 = 5V(NOTE 2) OSILLATOR SECTION Discharge Current IDISCHG Î 47 Î, Pin4 = 2V Unit V CURRENT SENSE SECTION Gain Maximum Input Signal PSRR Input Bias Current Delay to Output GV VI(MAX) PSRR IBIAS TD VCC = 12V to 25V (NOTE 1, 2) ï VPIN3 = 0V to 2V (NOTE1) ï ï ï KA3882/3/4/5 SMPS CONTROLLER ELECTRICAL CHARACTERISTICS(Continued) `, C (VCC = 15V, RT = 10K T Îto + 85Î, Unless otherwise specified) = 3.3nF, T A = 0 Characteristic Symbol Test Conditions Min Typ Max Unit 2.42 ï 2.50 2.58 V -0.3 -2 uA 65 90 ï dB 0.7 1 ï MHz 60 70 ï dB 2 6 ï mA -0.5 -0.8 ï mA 5 6 ï V ï 0.8 1.1 V ï ï 0.1 0.4 V ISINK = 200mA 1.5 2.2 13 13.5 ISOURCE = 200mA 12 13.5 T J = 25 ï ï ï V ISOURCE = 20mA 40 100 ns 40 100 ns 22 ï V V ERROR AMPLIFIER SECTION Input Voltage VI Input Bias Current IBIAS Open Loop Gain GVO Unity Gain Bandwidth GBW PSRR PSRR Output Sink Current Output Source Current ISINK ISOURCE Output High Voltage VOH Output Low Voltage VOL T PIN1 = 2.5V ï VO = 2V to 4V (NOTE 1) Î T J= 25 (NOTE 1) VCC = 12V to 25V (NOTE 1) VPIN2 = 2.7V VPIN1 = 1.1V VPIN2 = 2.3V VPIN1 = 5.0V VPIN2 = 2.3V ` to GND R1 = 15K VPIN2 = 2.7V ` to Pin8 R1 = 15K OUTPUT SECTION ISINK = 20mA Output Low Level Output High Level VOL VOH Rise Time tR Fall Time tF Output Voltage Swing Limit VOLIM Î, C1 = 1nF (NOTE 1) Î, C1 = 1nF T J = 25 (NOTE 1) VCC = 27V, C1 = 1nF ï ï V V UNDER VOLTAGE LOCKOUT SECTION Start Threshold Min.Operating Voltage ( After turn on ) VTH VTL KA3882/4 15 16 17 KA3883/5 7.8 8.4 9.0 V KA3882/4 9 10 11 V KA3883/5 7.0 7.6 8.2 V KA3882/3/4/5 SMPS CONTROLLER ELECTRICAL CHARACTERISTICS(Continued) `, C (VCC = 15V, RT = 10K T Îto +85Î, unless otherwise specified) = 3.3nF, T A = 0 Characteristic Symbol Test Conditions Min Typ Max Unit KA3882/3 94 96 100 % KA3884/5 ï 47 48 ï 50 % 0 % ï ï ï ï 0.2 0.4 mA 11 17 mA PWM SECTION Maximum Duty Cycle DMAX Minimum Duty Cycle DMIN TOTAL STANDBY CURRENT Start-Up Current IST Operating Supply Current ICC VPIN2 = VPIN3 = 0V VCC Zener Voltage VZ ICC = 25mA Adjust 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. VPIN1 VPIN3(VPIN3 = 0 to 0.8V) 3. Gain defined as: GV = L L ï 29 ï V 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. ACEx™ CoolFET™ CROSSVOLT™ E2CMOSTM FACT™ FACT Quiet Series™ FAST® FASTr™ GTO™ HiSeC™ ISOPLANAR™ MICROWIRE™ POP™ PowerTrench™ QS™ Quiet Series™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8 TinyLogic™ UHC™ VCX™ DISCLAIMER 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 Product Status Definition Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Preliminary First Production 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. No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. 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.