KA3882ED

KA3882ED Datasheet

KA3882E/KA3883E

Part	Datasheet
KA3882ED	KA3882ED (pdf)

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KA3882E/KA3883E SMPS Controller • 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 totem-pole output • Output swing limiting 22V The KA3882E/KA3883E is a fixed PWM controller for Off-Line and DC to DC converter applications. The internal circuits include a UVLO, a low start-up current circuit, a temperature compensated reference, a high gain error amplifier, a current sensing comparator, and the high current totem-pole output for driving a POWER MOSFET. Also the KA3882E/KA3883E provides low start-up current below 0.3mA and short shutdown delay time typ. 100ns. The KA3882E has UVLO threshold of 16V on and 10V off . The KA3883E is 8.4V on and 7.6V off . The KA3882E and KA3883E can operate within 100% duty cycle. 8-DIP 8-SOP Internal Block Diagram VREF 8 Internal Bias 5V VREF SET/ RESET Good LOGIC UVLO VFB 2 COMP 1 1/2VREF Error Amp + - 1/3 1V C.S PWM Comp. LATCH C.S 3 RT/CT 4 OSCILLATOR 7 VCC 29V 5 GND PWR VC 22V 6 OUTPUT PWR GND 2003 Fairchild Semiconductor Corporation KA3882E/KA3883E Absolute Maximum Ratings Parameter Supply voltage Output current Analog inputs pin2, 3 Error amp. output sink current Power dissipation Thermal resistance, junction-to-air Note4 8-SOP 8-DIP Storage temperature Symbol VCC IO VI ANA ISINK EA Tstg Value 30 +1 to 10 1 280 95 -65 ~ 150 Unit V A V mA W °C/W Electrical Characteristics VCC = 15V, RT = CT = 3.3nF, TA = 0°C to +70°C, Unless otherwise specified Ordering Information Product Number KA3882E KA3882ED KA3883E KA3883ED Package 8-DIP 8-SOP 8-DIP 8-SOP Operating Temperature 0 ~ +70°C 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 THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 11/3/03 0.0m 001 ” 2003 Fairchild Semiconductor Corporation

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KA3882E/KA3883E

SMPS Controller
• 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 totem-pole output
• Output swing limiting 22V

The KA3882E/KA3883E is a fixed PWM controller for Off-Line and DC to DC converter applications. The internal circuits include a UVLO, a low start-up current circuit, a temperature compensated reference, a high gain error amplifier, a current sensing comparator, and the high current totem-pole output for driving a POWER MOSFET. Also the KA3882E/KA3883E provides low start-up current below 0.3mA and short shutdown delay time typ. 100ns. The KA3882E has UVLO threshold of 16V on and 10V off . The KA3883E is 8.4V on and 7.6V off . The KA3882E and KA3883E can operate within 100% duty cycle.
8-DIP
8-SOP

Internal Block Diagram

VREF 8

Internal Bias
5V VREF

SET/ RESET

Good LOGIC

UVLO

VFB 2 COMP 1
1/2VREF

Error Amp + -
1/3 1V

C.S PWM Comp. LATCH

C.S 3

RT/CT 4

OSCILLATOR
7 VCC 29V
5 GND

PWR VC
22V 6 OUTPUT

PWR GND
2003 Fairchild Semiconductor Corporation

KA3882E/KA3883E

Absolute Maximum Ratings

Parameter Supply voltage Output current Analog inputs pin2, 3 Error amp. output sink current Power dissipation Thermal resistance, junction-to-air Note4 8-SOP 8-DIP Storage temperature

Symbol VCC IO

VI ANA ISINK EA

Tstg

Value 30 +1
to 10 1
280 95
-65 ~ 150

Unit V A V mA W
°C/W

Electrical Characteristics

VCC = 15V, RT = CT = 3.3nF, TA = 0°C to +70°C, Unless otherwise specified
Ordering Information

Product Number KA3882E KA3882ED KA3883E KA3883ED

Package 8-DIP 8-SOP 8-DIP 8-SOP

Operating Temperature 0 ~ +70°C

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 THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:

Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.

A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
11/3/03 0.0m 001 ” 2003 Fairchild Semiconductor Corporation

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Datasheet ID: KA3882ED 634114