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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
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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
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is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
KA7500C
SMPS Controller
Features
Description
Internal Regulator Provides a Stable 5V Reference
Supply Trimmed to ±1% Accuracy
Uncommitted Output TR for 200mA Sink or Source
Current
The KA7500C is used for the control circuit of the pulsewidth 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.
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
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 voltage regulation. The
operating temperature range is -25°C ~ +85°C.
Internal Circuit Prohibits Double Pulse at Either
Output
16-Lead DIP
16-Lead SOP
Ordering Information
Part Number
Operating
Temperature Range
Eco
Status
KA7500C
KA7500CD
Package
16-Lead Dual Inline Package (DIP)
-25 to +85°C
KA7500CDTF
RoHS
16-Lead Small Outline Package (SOP)
Packing Method
Tube
Tube
Tape and Reel
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2003 Fairchild Semiconductor Corporation
KA7500C • Rev. 1.0.2
www.fairchildsemi.com
KA7500C — SMPS Controller
April 2009
KA7500C — SMPS Controller
Block Diagram
Figure 1. Block Diagram
© 2003 Fairchild Semiconductor Corporation
KA7500C • Rev. 1.0.2
www.fairchildsemi.com
2
KA7500C — SMPS Controller
Typical Application
KSA1010
V I =10V to 40V
V O =5V
I O =1A
1mH, 2A
47 Ω
150 Ω
0.1µF
12
VC C
11
C2
8
C1
1MΩ
50µF
10V +
-2
3
COMP INPUT
5.1KΩ
V R EF 14
5.1KΩ
- 15
KA7500C
5.1KΩ
+1
150 Ω
D.T
4
GND
7
E1
9
E2
10
O.C
13
CT
5
RT
6
+ 16
+
50µF
50V
47KΩ
+
0.001µF
500µF
10V
+
GND
0.1
Figure 2. Pulse-Width Modulated Step-Down Converter
© 2003 Fairchild Semiconductor Corporation
KA7500C • Rev. 1.0.2
www.fairchildsemi.com
3
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device
reliability. The absolute maximum ratings are stress ratings only.
Symbol
VCC
Parameter
Min.
Max.
Unit
42
V
Supply Voltage
VC
Collector Supply Voltage
42
V
IO
Output Current
250
mA
VIN
Amplifier Input Voltage
VCC + 0.3
V
PD
Power Dissipation
KA7500C
1
KA7500CD
W
0.9
TOPR
Operation Temperature Range
-25
+85
°C
TSTG
Storage Temperature Rang
-65
+150
°C
+125
°C
TJ
Junction Temperature
KA7500C — SMPS Controller
Absolute Maximum Ratings
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol
VCC
VC1, VC2
IC1, IC2
Parameter
Power Supply Voltage
Typ.
Max.
Unit
7
15
40
V
30
40
V
Collector Supply Voltage
Collector Output Current (Each Transition)
VIN
Amplifier Input Voltage
IFB
Current Into Feedback Terminal
IREF
Reference Output Terminal
RT
Timing Resistor
CT
Timing Capacitor
fOSC
Oscillator Frequency
VIN_PWM
Min.
0.3
PWM Input Voltage (Pins 3, 4, and 13)
© 2003 Fairchild Semiconductor Corporation
KA7500C • Rev. 1.0.2
200
mA
VCC - 2.0
V
0.3
mA
10
mA
1.8
30.0
500.0
KΩ
0.0047
0.0010
10.0000
µA
1
40
200
kHz
5.3
V
0.3
www.fairchildsemi.com
4
VCC = 20V, f = 10kHz, TA = -25°C to +85°C, unless otherwise specified.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
IREF=1mA, TA=25°C
4.95
5.00
5.05
IREF=1mA
4.90
5.00
5.10
Units
Reference Section
(1)
V
VREF
Reference Output Voltage
RLINE
Line Regulation
VCC=7V to 40V
2
25
mV
RLOAD
Load Regulation
IREF=1mA to 10mA
1
15
mV
Short-Circuit Output Current
VREF=0V
35
50
mA
ISC
10
Oscillation Frequency
40.0
CT=0.001µF, RT=30KΩ
fOSC
Δf/Δt
Oscillation Frequency
Frequency Change with Temperature
CT=0.01µF, RT=12KΩ,
TA=25°C
9.2
CT=0.01µF, RT=12KΩ,
TA=TLOW to THIGH
9.0
10.0
10.8
KA7500C — SMPS Controller
Electrical Characteristics
kHz
12.0
CT=0.01µF, RT=12KΩ
2
%
-10
µA
Dead-Time Control Section
IBIAS
D(MAX)
VITH
Input Bias Current
VCC=15V, 0V≤ V4≤ 5.25V
Maximum Duty Cycle
VCC=15V, V4=0V, OC
Pin=VREF
Input Threshold Voltage
-2
45
Zero Duty Cycle
%
3.0
Maximum Duty Cycle
3.3
0
V
Error Amplifier Section
VIO
Input Offset Voltage
V3=2.5V
2
10
mV
IIO
Input Offset Current
V3=2.5V
25
250
mA
1.0
µA
VCC
V
IBIAS
Input Bias Current
V3=2.5V
VCIM
Common Mode Input Voltage
7V≤ VCC ≤ 40V
-0.3
0.2
GVO
Open-Loop Voltage Gain
0.5V≤ V3 ≤ 3.5V
70
BW
Unit-Gain Bandwidth
95
dB
650
kHz
PWM Comparator Section
VITH
Input Threshold Voltage
Zero Duty Cycle
ISINK
Input Sink Current
V3=0.7V
4.0
-0.3
4.5
-0.7
V
mA
Output Section
VCE(SAT)
Output Saturation Voltage Common
Emitter
VE=0V, IC=200mA
1.0
1.3
VCC(SAT)
Emitter-Follower
VC=15V, IE=-200mA
1.5
2.5
IC(OFF)
Collector Off-State Current
VCC=40V, VCE=40V
2
100
IE(OFF)
Emitter Off-State Current
VCC=VC=40V, VE=40V
-100
V
µA
Total Device
ICC
Supply Current
Pin6=VREF, VCC=15V
6
10
mA
Output Switching Characteristics
tR
Rise Time, Common Emitter,
Common Collector
100
200
tF
Fall Time, Common Emitter,
Common Collector
25
100
ns
Note:
1. This is guaranteed where the marking code of the package surface is over 027.
© 2003 Fairchild Semiconductor Corporation
KA7500C • Rev. 1.0.2
www.fairchildsemi.com
5
10.10
9.70
9.08
8.68
16
B
A
9
0.65
B
4.15
3.75
6.00
1
0.30
1.27
B
7.35
3.85
1.75
8
0.51
0.36
1.27
0.20 M C B A
LAND PATTERN RECOMMENDATION
TOP VIEW
1.65
1.45
R0.20
C
A
1.80 MAX
0.10 C
0.05 MIN
FRONT VIEW
0.36
R0.10
SEATING
PLANE
0.90
0.50
DETAIL A
SCALE 3:1
B
SIDE VIEW
NOTES:
A. THIS DRAWING COMPLIES WITH JEDEC
MS-012, EXCEPT AS NOTED
8°
GAGE
PLANE
0.303
0.153
B
C.
D.
E.
F.
THIS DIMENSION IS OUTSIDE JEDEC
MS-012 VALUE
ALL DIMENSIONS ARE IN MILLIMETERS
DIMENSIONS ARE EXCLUSIVE OF BURRS,
MOLD FLASH, AND TIE BAR EXTRUSIONS
LAND PATTERN STANDARD:
SOIC127P600X175-16AM
DRAWING FILENAME: MKT-M16Erev2
19.69
18.67
A
16
9
7.11
6.10
1
8
(0.40)
B
TOP VIEW
8.25
7.62
1.78
1.14
0.28
0.20
4.95
2.92
5.33 MAX
3.81
2.92
C
0.38 MIN
2.54
0.56
0.36
0.25 M C
FRONT VIEW
NOTES:
A. CONFORMS TO JEDEC MS-001, VARIATION BB
B. ALL DIMENSIONS ARE IN MILLIMETERS
C. DIMENSIONS ARE EXCLUSIVE OF BURRS,
MOLD FLASH, AND TIE BAR PROTRUSIONS
D. DIMENSIONS AND TOLERANCES PER ASME
Y14.5M-2009
E. DRAWING FILENAME: MKT-N16Erev3
10.92
SIDE VIEW
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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