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PDF ( 数据手册 , 数据表 ) KA7525BD

零件编号 KA7525BD
描述 Power Factor Correction Controller
制造商 Fairchild
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KA7525BD 数据手册, 描述, 功能
KA7525B
Power Factor Correction Controller
www.fairchildsemi.com
Features
• Internal Start-up Timer
• Internal Current Sense Blanking Which Eliminates the
Need for an External R/C filter
• Overvoltage Comparator Eliminates Runaway Output
Voltage
• Zero Current Detector
• One Quadrant Multiplier
• Trimmed 1.5% Internal Bandgap Reference
• Under Voltage Lock Out with 2.1V of Hysteresis
• Totem Pole Output with High State Clamp
• Low Start-up and Operating Current
• 8-Pin DIP or 8-Pin SOP.
Applications
• Electronic Ballast
• SMPS
Description
The KA7525B provides simple and high performance active
power factor correction. KA7525B is optimized for
electronic ballast and low power, high density power
supplies requiring a minimum board area, reduced
component count and low power dissipation. Addition of
internal current sense blanking (Internal R,C) eliminates the
need for an external R/C filter. Internal clamping of the error
amplifier and multiplier outputs improves turn on overshoot
characteristics and current limiting. Special circuitry has also
been added to prevent no load runaway conditions. Output
drive clamps limiting power MOSFET gate drive
independent of supply voltage greatly enhance the products
practical application.
8-DIP
1
8-SOP
1
©2002 Fairchild Semiconductor Corporation
Rev.1.0.1







KA7525BD pdf, 数据表
KA7525B
Typical Performance Characteristics (Continued)
300
250
200
150
100
50
0
-20 0 20 40 60 80 100 120 140
Temperature['C]
Figure 13. Idet Input Hysteresis vs Temperature
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
-20 0 20 40 60 80 100 120 140
Temperature
Figure 15. Max. Mult. Output Voltage vs Temperature
120
110
100
90
80
70
60
50
40
30
20
10
0
-20 0 20 40 60 80 100 120 140
Temperature['C]
Figure 17. Fall Time vs Temperature
600
500
400
300
200
100
0
-20 0 20 40 60 80 100 120 140
Temperature['C]
Figure 14. Restart Time vs Temperature
200
180
160
140
120
100
80
60
40
20
0
-20 0 20 40 60 80 100 120 140
Temperature['C]
Figure 16. Rise Time vs Temperature
8
7
6
5
4
3
2
1
0
-20
0
20 40 60 80 100 120 140
Temperature['C]
Figure 18. Supply Current vs Temperature
8







KA7525BD equivalent, schematic
KA7525B
Mechanical Dimensions
Package
6.40 ±0.20
0.252 ±0.008
#1 #8
8-DIP
Dimensions in millimeters
#4 #5
7.62
0.300
5.08
0.200
MAX
3.40 ±0.20
0.134 ±0.008
3.30 ±0.30
0.130 ±0.012
0.33
0.013
MIN
0~15°
0.25
+0.10
–0.05
0.010
+0.004
–0.002
16










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