KA3524

KA3524 Datasheet

KA3524

Part	Datasheet
KA3524	KA3524 (pdf)

PDF Datasheet Preview
KA3524 SMPS Controller • Complete PWM power control circuit • Operation beyond 100KHz • 2% frequency stability with temperature • Total quiescent current less than 10mA • Single ended or push-pull outputs • Current limit amplifier provides external component protection • On-chip protection against excessive junction temperature and output current • 5V, 50mA linear regulator output available to user The KA3524 regulating pulse width modulator contains all of the control circuit necessary to implement switching regulators of either polarity, transformer coupled DC to DC converters, transformerless polarity converters and voltage doublers, as well as other power control applications. This device includes a 5V voltage regulator capable of supplying up to 50mA to external circuit , a control amplifier, an oscillator, a pulse width modulator, a phase splitting flip-flop, dual alternating output switch transistors, and current limiting and shut-down circuit. Both the regulator output transistor and each output switch are internally current limiting and, to limit junction temperature, aninternal thermal shutdown circuit is employed. 16-DIP Internal Block Diagram 2000 Fairchild Semiconductor International KA3524 Absolute Maximum Ratings Parameter Value Unit Supply Voltage Reference Output Current IREF Output Current Each Output Oscillator Charging Current pin 6 or 7 ICHG OSC Lead Temperature Soldering, 10 sec TLEAD Power Dissipation TA = 25°C 1000 Operating Temperature TPOR 0 ~ +70 Storage Temperature TSTG -65 ~ + 150 Electrical Characteristics VIN=20V, f=20KHz, TA = 0 to +70°C, unless otherwise specified Parameter REFERENCE SECTION Reference Output Voltage Line Regulation Load Regulation Ripple Rejection Short-Circuit Output Current Temperature Stability Long Term Stability OSCILLATOR SECTION Maximum Frequency Initial Accuracy Frequency Change with Voltage Frequency Change with Temperature Clock Amplitude Pin 3 Clock Width Pin 3 ERROR AMPLIFIER SECTION Input Offset Voltage Input Bias Current Open Loop Voltage Gain Common-Mode Input Voltage Common-Mode Rejection Ratio Small Signal Bandwidth Output Voltage Swing Conditions Min. Typ. Max. Unit VREF RR ISC STT ST VCC = 8V to 40V IREF = 0 mA to 20 mA f = 120Hz, TA = 25°C VREF = 0, TA = 25°C TA = 25°C - 10 30 mV - 20 50 mV Ordering Information Product Number KA3524 Package 16-DIP Operating Temperature 0 ~ 70°C KA3524 KA3524 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 INTERNATIONAL. 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. 9/25/00 0.0m 001 2000 Fairchild Semiconductor International

PDF Datasheet Preview

KA3524

SMPS Controller
• Complete PWM power control circuit
• Operation beyond 100KHz
• 2% frequency stability with temperature
• Total quiescent current less than 10mA
• Single ended or push-pull outputs
• Current limit amplifier provides external component
protection
• On-chip protection against excessive junction temperature
and output current
• 5V, 50mA linear regulator output available to user

The KA3524 regulating pulse width modulator contains all of the control circuit necessary to implement switching regulators of either polarity, transformer coupled DC to DC converters, transformerless polarity converters and voltage doublers, as well as other power control applications. This device includes a 5V voltage regulator capable of supplying up to 50mA to external circuit , a control amplifier, an oscillator, a pulse width modulator, a phase splitting flip-flop, dual alternating output switch transistors, and current limiting and shut-down circuit. Both the regulator output transistor and each output switch are internally current limiting and, to limit junction temperature, aninternal thermal shutdown circuit is employed.
16-DIP

Internal Block Diagram
2000 Fairchild Semiconductor International

KA3524

Absolute Maximum Ratings

Parameter

Value

Unit

Supply Voltage

Reference Output Current

IREF

Output Current Each Output

Oscillator Charging Current pin 6 or 7

ICHG OSC

Lead Temperature Soldering, 10 sec

TLEAD

Power Dissipation TA = 25°C
1000

Operating Temperature

TPOR
0 ~ +70

Storage Temperature

TSTG
-65 ~ + 150

Electrical Characteristics

VIN=20V, f=20KHz, TA = 0 to +70°C, unless otherwise specified

Parameter REFERENCE SECTION Reference Output Voltage Line Regulation Load Regulation Ripple Rejection Short-Circuit Output Current Temperature Stability Long Term Stability OSCILLATOR SECTION Maximum Frequency Initial Accuracy Frequency Change with Voltage Frequency Change with Temperature Clock Amplitude Pin 3 Clock Width Pin 3 ERROR AMPLIFIER SECTION Input Offset Voltage Input Bias Current Open Loop Voltage Gain Common-Mode Input Voltage Common-Mode Rejection Ratio Small Signal Bandwidth Output Voltage Swing

Conditions

Min. Typ. Max. Unit

VREF

RR ISC STT ST

VCC = 8V to 40V IREF = 0 mA to 20 mA f = 120Hz, TA = 25°C VREF = 0, TA = 25°C

TA = 25°C
- 10 30 mV
- 20 50 mV
Ordering Information

Product Number KA3524

Package 16-DIP

Operating Temperature 0 ~ 70°C

KA3524

KA3524

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 INTERNATIONAL. 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.
9/25/00 0.0m 001 2000 Fairchild Semiconductor International

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived KA3524 Datasheet file may be downloaded here without warranties.

Datasheet ID: KA3524 634112