Driver Pwm Ka7500c

8/12/2019 Driver Pwm Ka7500c

1/8

2003 Fairchild Semiconductor Corporation

www.fairchildsemi.com

Rev. 1.0.1

Features

Internal Regulator Provides a Stable 5V Reference Supply

Trimmed to 1% Accuracy.

Uncommitted Output TR for 200mA Sink or Source

Current

Output Control for Push-Pull or Single-Ended Operation

Variable Duty Cycle by Dead Time Control (Pin 4)

Complete PWM Control Circuit

On-Chip Oscillator With Master or Slave Operation Internal Circuit Prohibits Double Pulse at Either Output

Description

The KA7500C is used for the control circuit of the pulse

width modulation switching regulator. The KA7500C

consists of 5V reference voltage circuit, two error amplifiers,

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. The

precision of voltage reference (Vref) is improved up to 1%

with trimming. This provides a better output voltageregulation. The operating temperature range is

-25C ~ +85C.

16-DIP

16-SOP1

1

Internal Block Diagram

OSCILLATOR

6

5

4

1

2

16

15

3

7

14

12

10

11

9

813

BAND GAPREFERENCE

1

2

+

_

+

_

0.7MA

D

CK Q

Q

C1

E1

C2

E2

VCC

VREF

GND

COMP INPUT

OUTPUT CONTROL

5V

RT

CT

DEADTIMECONTROL

EA(+)

EA(-)

EA(+)

EA(-)

1.2V

PWMCOMP

KA7500C

SMPS Controller


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KA7500C

2

Absolute Maximum Ratings

Recommended Operating Conditions

Parameter Symbol Value Unit

Supply Voltage VCC 42 V

Collector Supply Voltage VC 42 V

Output Current IO 250 mA

Amplifier Input Voltage VIN VCC +0.3 V

Power Dissipation (TA= 25C) PD1 (KA7500C)

0.9 (KA7500CD)W

Operating Temperature Range TOPR -25 ~ +85 C

Storage Temperature Range TSTG -65 ~ +150 C

Junction Temperature Tj 125 C

Parameter Symbol Min. Typ. Max. Unit

Power Supply Voltage VCC 7.0 15 40 V

Collector Output Voltage VC1,VC2 - 30 40 V

Collector Output Current (Each Transistor) IC1,IC2 - - 200 mA

Amplifier Input Voltage VIN 0.3 - VCC-2.0 V

Current Into Feedback Terminal Ifb - - 0.3 mA

Reference Output Current Iref - - 10 mA

Timing Resistor RT 1.8 30 500

Timing Capacitor CT 0.0047 0.001 10 uF

Oscillator Frequency f osc 1.0 40 200 kHz

PWM Input Voltage (Pins3, 4, 13) - 0.3 - 5.3 V


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KA7500C

3

Electrical Characteristics

(VCC= 20V, f = 10kHz, TA= -25C to +85C, unless otherwise specified)

Parameter Symbol Conditions Min. Typ. Max. Unit

REFERENCE SECTION

Reference Output Voltage VREFIREF= 1mA, TA=25C(Note1) 4.95 5.0 5.05

VIREF= 1mA 4.9 5.0 5.1

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

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

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

OSCILLATOR SECTION

Oscillation Frequency f osc

CT= 0.001F, RT= 30K - 40 -

kHzCT= 0.001F, RT= 12K,TA=25C 9.2 10 10.8

CT= 0.001F, RT= 30K,TA=Tlowto Thigh 9.0 - 12

Frequency Change with

Temperaturef/T CT= 0.01F, RT= 12K - - 2 %

DEAD TIME CONTROL SECTION

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

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

O.C Pin = VREF45 - - %

Input Threshold Voltage VITHZero Duty Cycle - 3.0 3.3

VMax. Duty 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 A

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 BW - - 650 - kHz

PWM COMPARATOR SECTION

Input Threshold Voltage VITH Zero Duty Cycle - 4 4.5 V

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

OUTPUT SECTION

Output Saturation Voltage

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


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KA7500C

4

Electrical Characteristics (Continued)

(VCC= 20V, f = 10kHz, TA= -25C to +85C, unless otherwise specified)

Note :

1. This is guaranteed where the marking code of the package surface is over 027

Parameter Symbol Conditions Min. Typ. Max. Unit

Emitter-Follower VCC(SAT) VC= 15V, IE = -200mA - 1.5 2.5 V

Collector Off-State Current IC(OFF) VCC= 40V, VCE= 40V - 2 100 A

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

TOTAL DEVICE

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

OUTPUT SWITCHING CHARACTERISTIC

Rise TimetR - - 100 200 ns

Common Emitter, Common Collector

Fall TimetF - - 25 100 ns

Common Emitter, Common Collector


5/8

KA7500C

5

Typical Application

Pulse Width Modulated Step-down Converter

KA7500C

12VCC

11C2

8C1

3COMP INPUT

- 2

VREF14

- 15

+ 1

+ 16CT5

RT6

D.T

4

GND7

E19

E2

10O.C

13

KSA1010VI =10V to 40V 1mH, 2A

VO=5VIO=1A

GND

47

1501M

5.1K

5.1K

5.1K

150

47K 0.001uF+50uF

50V

+

0.1

+50uF

10V

0.1uF

+

500uF10V


6/8

KA7500C

6

Mechanical Dimensions

Package

Dimensions in millimeters

0.70 0.20

0.0275 0.008

#1

#8 #9

#16

9.9

00.2

0

0.3

90.0

08

1

.27

0.0

50

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

10.3

0

0.4

05

MAX

0~8

0.5

1

0.0

20

(

)

1.80

0.071

MAX0.1

0

MAX0.0

04

MAX

MIN

+0

.10

-0

.05

0.

20

+0

.004

-0

.002

0.

008

+0.1

0

-0.0

5

0.4

06

+0.0

04

-0.0

02

0.0

16

16-SOP


7/8

KA7500C

7

Mechanical Dimensions (Continued)

Package

Dimensions in millimeters

#1

#8 #9

#16

6.40 0.20

7.62

0.300

2.5

4

0.1

00

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

19.4

00.2

0

0.7

640.0

08

19.8

0

0.7

80

MAX

5.08

0.200

0.38

0.014

MAX

MIN

0.8

1

0.0

32

(

)

0.4

60.1

0

0.0

180.0

04

0.0

590.0

04

1.5

00.1

0

16-DIP


8/8

KA7500C

5/9/03 0.0m 001Stock#DSxxxxxxxx

2003 Fairchild Semiconductor Corporation

LIFE SUPPORT POLICY

FAIRCHILDS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICESOR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTORCORPORATION. As used herein:

1. Life support devices or systems are devices or systemswhich, (a) are intended for surgical implant into the body,or (b) support or sustain life, and (c) whose failure toperform when properly used in accordance withinstructions for use provided in the labeling, can bereasonably expected to result in a significant injury of the

user.

2. A critical component in any component of a life supportdevice or system whose failure to perform can bereasonably expected to cause the failure of the life supportdevice or system, or to affect its safety or effectiveness.

www.fairchildsemi.com

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 ANYLIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHERDOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

Ordering Information

Product Number Package Operating Temperature

KA7500C 16-DIP-25 ~ +85C

KA7500CD 16-SOP

Driver Pwm Ka7500c

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