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KA7526D の電気的特性と機能

KA7526DのメーカーはFairchildです、この部品の機能は「Power Factor Correction Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 KA7526D
部品説明 Power Factor Correction Controller
メーカ Fairchild
ロゴ Fairchild ロゴ 




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KA7526D Datasheet, KA7526D PDF,ピン配置, 機能
KA7526
Power Factor Correction Controller
www.fairchildsemi.com
Features
• Internal Startup Timer
• Internal R/C filter 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 5V of Hysteresis
• Totem Pole Output with High State Clamp
• Low Startup and Operating Current
• 8-Pin DIP or 8-Pin SOP
Applications
• Electronic Ballast
• SMPS
Descriptions
The KA7526 provides simple and high performance active
power factor correction. KA7526 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 R/C filter eliminates
the need for an external R/C filter. Internal clamping of the
error amplifier and multiplier outputs improves turn on over-
shoot characteristics and current limiting. Special circuitry
has also been added to prevent no load runaway conditions.
The output drive clamping circuit limits overshoot of the
power MOSFET gate drive Independent of supply voltage,
so that it greatly enhance the system reliability.
8-DIP
8-SOP
1
1
©2000 Fairchild Semiconductor International
Rev. 5.0

1 Page





KA7526D pdf, ピン配列
PIN Assignments
KA7526
INV 1
8 Vcc
EA OUT 2
7 OUT
MULT 3
CS 4
6 GND
5 Idet
(Top View)
Pin Definitions
Pin Number
Pin Name
1 INV
2 EA OUT
3 MULT
4 CS
5 Idet
6 GND
7 OUT
8 VCC
Pin Function Descrition
Inverting input of the error amplifier. The output of the boost
converter should be resistively divided to 2.5V and con-
nected to this pin.
The output of the error amplifier. A feedback compensation
network is placed between this pin and the INV pin
Input to the multiplier stage. The full-wave rectified AC is
divided to less than 3.8V and is connected to this pin.
Input to the PWM comparator. The Current is sensed in the boost
stage by a resistor in the source lead of MOSFET. An internal leading
edge blanking circuitry has been included to reject any high
frequency noise present on the current waveform.
The zero current detector senses the inductor current by monitoring
when the boost inductor auxilary winding voltage falls below 1.8V.
The ground potential of all the pins.
The output of a high-current power driver capable of driving
the gate of a power MOSFET.
The logic and control power supply connection.
3


3Pages


KA7526D 電子部品, 半導体
KA7526
Electrical Characteristics (Continued)
Parameter
CURRENT SENSE SECTION
Input Offset Voltage (Note2)
Input Bias Current
Current Sense Delay to Output (Note2)
DETECT SECTION
Detect Input Threshold
Detect Hysteresis
Input Low Clamp Voltage
Input High Clamp Voltage
Input Bias Current
Input High/low Clamp Diode Current (Note2)
OUTPUT DRIVER SECTION
Output Voltage High
Output Voltage Low
Rising Time (Note2)
Falling Time (Note2)
Maximum Output Voltage
Output Voltage With Uvlo Activated
RESTART TIMER SECTION
Restart Time Delay
OVERVOLTAGE PROTECTION SECTION
Symbol
Vio(cs)
Ib(cs)
td(cs)
Vth(det)
HY(det)
Vclamp(I)
Vclamp(h)
Ib(det)
Iclamp
VOH
VOL
tr
tf
Vomax(o)
Vomin(o)
td(rst)
Voltage Feedback Input Threshold
Vth(ovp)
Condition
Vm1=0V, Vm2=2.2V
0VVCC1.7V
-
Vdet Increasing
-
Idet=-100µA
Idet=3mA
1VVdet6V
-
IO=-10mA, VCC=12V
IO=10mA, VCC=12V
CI=1nF
CI=1nF
VCC=20V
VCC=5V, IO=100µA
Vm1=1V, Vm2=3.5V
Vcs=-0.5V, Vm1=1V
Vdet=0V
Min. Typ. Max. Unit
-10 3 10 mV
-1 -0.3 1 µA
- 200 500 ns
1.5 1.8 2.1 V
180 240 400 mV
0.45 0.75 1 V
6.7 7.5 8.3 V
-1 -0.2 1 µA
- - ± 3 mA
8.5 9
-V
- 0.8 1 V
- 130 200 ns
- 50 120 ns
12 13 15 V
- - 1V
- 300 - µs
1.7 1.8 1.9 V
Notes :
1. Because the reference is not brought out externally, this specification cannot be tested on the package part. It is guaranteed
by design.
2. This parameter, although guaranteed, is not tested in production.
3. K = Pin4 Threshold
Vm1×(Vm2-Vref)
(Vm1=Vpin3, Vm2=Vpin2)
6

6 Page



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共有リンク

Link :


部品番号部品説明メーカ
KA7526

Power Factor Correction Controller

Fairchild
Fairchild
KA7526D

Power Factor Correction Controller

Fairchild
Fairchild


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