KA7500B - ON SEMICONDUCTOR

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Is Now Part of

ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number

of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right

to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability

arising out of the application or use of any product or circuit, and speciﬁcally disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON

Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON

Semiconductor data sheets and/or speciﬁcations can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s

technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA

Class 3 medical devices or medical devices with a same or similar classiﬁcation in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended

or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its ofﬁcers, employees, subsidiaries, afﬁliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out

of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor

is an Equal Opportunity/Afﬁrmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

www.fairchildsemi.com

Rev. 1.0.0

Features

• Inter nal Regulat or Provides a Stable 5V Re ference Sup ply

Trimmed to 5%

• Uncommitted Output TR for 200mA Sink or Sour ce

Current

• Output Control For Push-Pull or Single Ended Operation

• Variable Duty Cycle By Dead Time Contro l (Pin 4)

Complete PWM Control Circuit

• On-Chip Oscillator With Master or Slave Opera tion

• Internal Circuit Prohibits Double Pulse at Either Output

Description

The KA7500B is used for the control circu it of the PWM

switching regulator. The KA7500B consists of 5V reference

voltage circuit, two error amplifiers, a flip flop, an output

control circuit, a PWM comparator, a dead time comparator

and an oscillator. This device can be operated in the

switching frequency of 1kHz to 300kHz.

16-DIP

16-SOP

Internal Block Diagram

KA7500B

SMPS Controller

KA7500B

Absolute Maximum Ratings

Parameter Symbol Value Unit

Supply Voltage VCC 42 V

Collector Supply Voltage VC42 V

Output Current IO250 mA

Amplifier Input Voltage VIN VCC +0.3 V

Power Dissipation (TA = 25°C) PD1 (KA7500B)

0.9 (KA7500BD) W

Operating Temperature Range TOPR 0 ~ +70 °C

Storage Temperature Range TSTG -65 ~ +150 °C

KA7500B

Electrical Characteristics

(VCC = 20V, f = 10kHz, TA = 0°C to +70°C, unless otherwise specified)

Note:

1. This parameter, although guaranteed, is not 100% tested in production.

Parameter Symbol Conditions Min. Typ. Max. Unit

REFERENCE SECTION

Reference Output Voltag e VREF IREF = 1mA 4.75 5.0 5.25 V

Line Regulation ∆VREF VCC = 7V to 40V - 2.0 25 mV

Temperature Coefficient of V REF ∆VREF/∆TT

A = 0°C to 70°C - 0.01 0.03 %/°C

Load Regulation ∆VREF IREF = 1mA to 10mA - 1.0 15 mV

Short-Circuit Output Current ISC VREF = 0V 10 35 50 mA

OSCILLATOR SECTION

Oscillation Frequency f CT = 0.01µF, RT = 12kΩ-10-kHz

Frequency Change with Temperature ∆f/∆TC

T = 0.01µF, RT = 12kΩ--2%

DEAD TIME CONTROL SECTION

Input Bias Current IBIAS VCC = 15V, 0V≤V4≤5.25V - -2.0 -10 µA

Maximum Duty Cycle D(MAX) VCC = 15V, V4 = 0V

O.C Pin = VREF 45 - - %

Input Threshold Volt age VITH Zero Duty Cycle - 3.0 3.3 V

Max. Du t y Cycle 0 - -

ERROR AMP SECTION

Input Offset Voltage VIO V3 = 2.5V - 2.0 10 mV

Input Offset Current IIO V3 = 2.5V - 25 250 mA

Input Bias Current IBIAS V3 = 2.5V - 0.2 1.0 µA

Common Mode Input Voltage VCM 7V ≤ VCC ≤ 40V -0.3 - VCC V

Open-Loop Voltage Gain GVO 0.5V ≤ V3 ≤3 .5V 70 95 - dB

Unit-Gain Bandwidth (Note1) BW --650-kHz

PWM COM PARATOR SECT ION

Input Th reshold Voltage VITH Zero Du ty Cy cl e - 4 4.5 V

Input Sink Current ISINK V3=0.7V -0.3 -0.7 - mV

OUTPUT SECTION

Output S aturation Voltage

Common Emitter VCE(SAT) VE = 0, IC = 200mA - 1.1 1.3 V

Common Collector VCC(SAT) VC = 15V, IE = -200mA - 1.5 2.5

Collector Off-State Curr en t IC(OFF) VCC = 40V, VCE = 40V - 2 100 µA

Emitter Off-State Current IE(OFF) VCC = VC = 40V, VE = 0 - - -100

TOTAL DEVICE

Supply Current ICC Pin 6 = VREF, VCC = 15V - 6 10 mA

OUTPUT SWITCHI NG CHARACTERISTICS

Rise Time tR-----

Common Emitter - --100200

Common Collector - --100200

Fall Ti me tF-----

Common Emitter - --25100

Common Collector - --40100

KA7500B

Typical Application

Pulse Width Modulated Step-down Converter

KA7500B

Vcc 11

C2 8

C1 3

COMP INPUT - 2

VREF 14

- 15

+ 1

+16

D.T

4GND

7E1

9E2

10 O.C

13 RT

6CT

KSA1010 1mH,2A Vo=5V

Io=1A

VI=10V to 40V

47Ω

150Ω1MΩ

0.1uF 50uF

10V

5.1kΩ

50uF

10V

GND

0.1

0.001uF

50uF

50V

5.1kΩ

150Ω

47kΩ

5.1kΩ

KA7500B

Mechanical Dimensions

Package

#8 #9

#16

6.40

±0.20

7.62

0.300

2.54

0.100

0.252

±0.008

0~15°

0.25

+0.10

–0.05

0.010

+0.004

–0.002

3.30

±0.30

0.130

±0.012

3.25

±0.20

0.128

±0.008

19.40

±0.20

0.764

±0.008

19.80

0.780 MAX

5.08

0.200

0.38

0.014

MAX

MIN

0.81

0.032

()

0.46

±0.10

0.018

±0.004

0.059

±0.004

1.50

±0.10

16-DIP

KA7500B

Mechanical Dimensions (Continued)

Package

0.70 ±0.20

0.0275 ±0.008

#8 #9

#16

9.90 ±0.20

0.39 ±0.008

1.27

0.050

5.72

0.225

1.55 ±0.10

0.061 ±0.004

0.05

0.002

6.00 ±0.30

0.236 ±0.012

3.95 ±0.20

0.156 ±0.008

10.30

0.405 MAX

0~8°

0.51

0.020

()

1.80

0.071

MAX0.10

MAX0.004

MAX

MIN

+0.10

-0.05

0.20+0.004

-0.002

0.008

+0.10

-0.05

0.406+0.004

-0.002

0.016

16-SOP

KA7500B

Ordering Information

Product Number Package Operating Temperature

KA7500B 16-DIP 0 ~ +70°C

KA7500BD 16-SOP

KA7500B

9/10/02 0.0m 001

Stock#DSxxxxxxxx

 2002 Fairchild Semiconductor Corporation

LIFE SU PP ORT POLICY

FAIRCHILD’S PRODUCTS AR E NOT AUTHORIZED FOR USE AS CRITICAL COMP ONENTS IN L IFE SUPPOR T DEVICES

OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR

CORPORA TION. As used herein:

1. Life support devices or systems are devices or systems

which, (a ) are intended for surgical im plant 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

reasonab ly expected to result in a significant injury of the

user.

2. A critical component in any component of a life support

device or system whose failure to perfo rm can be

reasonably expected to cause the failure of the life support

device or system, or to affect its safety or effec tiveness.

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FAIRCHILD SEMI CONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY

PRO DUCTS HEREI N TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DO ES NOT ASSUME ANY

LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER

DOES IT CONVEY A NY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OT HERS.

www.onsemi.com

ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.

ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent

coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.

ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability

arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.

Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,

regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or

specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer

application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not

designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification

in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized

application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and

expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such

claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This

literature is subject to all applicable copyright laws and is not for resale in any manner.

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