FAN7527DTF [FAIRCHILD]
Power Factor And Fluorescent Light Controller, Current-mode, 0.5A, BIPolar, PDSO8, SOP-8;
| 型号： | FAN7527DTF |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Power Factor And Fluorescent Light Controller, Current-mode, 0.5A, BIPolar, PDSO8, SOP-8 功率因数校正 控制器 |
| 文件： | 总12页 (文件大小：397K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
FAN7527B
Power Factor Correction Controller
Features
Description
• Internal Start-up Timer
• Internal R/C Filter Eliminates the Need for an External
R/C Filter
• Very Precise Adjustable Output Over Voltage Protection
• Zero Current Detector
• One Quadrant Multiplier
• Trimmed 1.5% Internal Band Gap Reference
• Under Voltage Lockout with 3V of Hysteresis
• Totem Pole Output With High State Clamp
• Low Start-up and Operating Current
• 8-Pin DIP or 8-Pin SOP
The FAN7527B provides simple and high performance
active power factor correction. The FAN7527B is optimized
for electronic ballasts and low power and high density power
supplies which require minimum board size, reduced
external components and low power dissipation. Because the
R/C filter is included in the current sense block, the external
R/C filter is not necessary. Special circuitry has also been
added to prevent no load runaway conditions. Regardless of
the supply voltage, the output drive clamping circuit limits
the overshoot of the power MOSFET gate drive. It greatly
enhances the system reliability.
Applications
8-DIP
• Electronic Ballast
• SMPS
1
8-SOP
1
Rev 1.0.1
©2002 Fairchild Semiconductor Corporation
FAN7527B
Internal Block Diagram
Vcc
8
2.5V Ref
Vcc
+
−
Internal
Bias
UVLO
8.5V
11.5V
7
OUT
Drive
Output
Timer R
5
4
S
Idet
+
−
7.2V
2V 1.5V
Q
Zero Current
Detector
Static OVP
40k
CS
+
−
+
−
R
8pF
2.25V
Current Sense
Comparator
Vref
Veao(L)=2.25V
1.8V
Vmo
0.25V
Vref
−
+
−
Vm1
0 ~ 3.8V
+
MULT
3
Vm2
INV
Vref~Vref+2.5V
1
Vea(-)
Multiplier
OVP
Current
Detector
Isovp=30uA
Idovp=40uA
Error Amp
Vmo
K =
Vm1 (Vm2− Vref)
6
2
EA_OUT
GND
2
FAN7527B
PIN Description
INV
1
2
3
4
Vcc
8
7
6
5
OUT
EA_OUT
MULT
GND
ldet
CS
(Top View)
Pin Number
Pin Name
Pin Function Description
Inverting input of the error amplifier. The output of the boost converter
should be resistively divided to 2.5V and connected to this pin.
1
INV
The output of the error amplifier. A feedback compensation network is
placed between this pin and the INV pin.
2
3
EA_OUT
MULT
Input to the multiplier stage. The full-wave rectified AC voltage is
divided to less than 2V and is connected to this pin.
Input of the PWM comparator. The MOSFET current is sensed by a
resistor and the resulting voltage is applied to this pin. An internal R/C
filter is included to reject any high frequency noise.
4
CS
5
6
ldet
Zero current detection input.
GND
The ground potential of all the pins.
Gate driver output. The push pull output stage is able to drive the
Power MOSFET with peak current of 500mA.
7
8
OUT
Vcc
Supply voltage of driver and control circuits.
3
FAN7527B
Absolute Maximum Ratings (Ta=25°C)
Characteristics
Symbol
Value
30
Unit
V
Supply Voltage
V
CC
,I
Peak Drive Output Current
I
±500
mA
mA
mA
V
OH OL
Driver Output Clamping Diodes Vo > Vcc or Vo < -0.3V
Detector Clamping Diodes
lclamp
ldet
Vin
±10
±10
Error Amp, Multiplier and Comparator Input Voltages
Operating Junction Temperature
Operating Temperature Range
Storage Temperature Range
Power Dissipation
-0.3 to 6
150
Tj
°C
°C
°C
W
Topr
Tstg
Pd
-25 to 125
-65 to 150
0.8
Temperature Characteristics (-25°C ≤ Ta ≤ 125°C)
Characteristics
Symbol
∆Vref
Min.
Typ.
Max.
Unit
Temperature Stability for Reference Voltage (V
Temperature Stability for Multiplier Gain (K)
)
-
-
20
-
-
mV
ref
∆K/∆T
-0.2
%/°C
4
FAN7527B
Electrical Characteristics
V
= 14V, -25°C ≤ Ta ≤ 125°C, unless otherwise stated.
CC
Characteristics
Symbol
Test Condition
Min. Typ.
Max.
Unit
< UNDER VOLTAGE LOCKOUT SECTION>
Start Threshold Voltage
V
Vcc Increasing
10.5 11.5
12.5
4
V
V
th(st)
UVLO Hysteresis
-
2
3
HY(st)
< SUPPLY CURRENT SECTION >
Start-up Supply Current
I
Vcc = Vth(st) -0.2V
Output not switching
Vinv = 3V
10
-
60
3
100
6
uA
mA
mA
mA
st
Operating Supply Current
Operating Current at OVP
Dynamic Operating Supply Current
< ERROR AMPLIFIER SECTION >
I
cc
cc(ovp)
I
-
1.7
4
4
I
50kHz, CI = 1nF
-
8
dcc
Iref = 0mA, Ta = 25°C
-25 ≤ Ta ≤ 125°C
14V ≤ Vcc ≤ 25V
-25 ≤ Ta ≤ 125°C
-
2.465 2.5
2.535
V
V
Voltage Feedback Input Threshold
V
ref
2.44
2.5
0.1
20
-
2.56
Line Regulation
∆V
∆V
1
3
-
-
10
mV
mV
uA
mA
mA
V
ref
Temperature Stability of Vref (Note1)
Input Bias Current
-
ref
Ib
-0.5
-2
2
0.5
(ea)
Output Source Current
Output Sink Current
I
Vm2 = 4V
-4
-
-
-
-
-
-
-
-
source
Isink
Vm2 = 4V
4
Output Upper Clamp Voltage (Note2) Veao(H) Isource = 0.1mA
-
6
Output Lower Clamp Voltage (Note3) Veao(L)
Large Signal Open Loop Gain (Note4)
Power Supply Rejection Ratio (Note5) PSRR
Isink = 0.1mA
-
2.25
80
80
1
V
G
-
60
60
-
dB
dB
MHz
V/us
v
14V ≤ Vcc ≤ 25V
Unity Gain Bandwidth (Note6)
Slew Rate (Note7)
GBW
SR
-
-
-
0.6
< MULTIPLIER SECTION>
Input Bias Current (Pin3)
Ib
-
-0.5
0
-
-
-
0.5
3.8
uA
V
(m)
M1 Input Voltage Range (Pin3)
M2 Input Voltage Range (Pin2)
Multiplier Gain (Note8)
∆V 1
-
m
∆V 2
-
Vref
Vref+2.5
0.52
1.95
-
V
m
K
Vm1 = 1V, Vm2 = 3.5V
0.36 0.44
1/V
V
Maximum Multiplier Output Voltage
Temperature Stability of K (Note9)
Vomax(m) Vinv =0V, Vm1 = 4V
∆K/∆T -25 ≤ Ta ≤ 125°C
1.65
-
1.8
-0.2
%/°C
5
FAN7527B
Electrical Characteristics (Continued)
V
= 14V, -25°C ≤ Ta ≤ 125°C, unless otherwise stated.
CC
Characteristics
Symbol
Test Condition
Min. Typ. Max. Unit
< CURRENT SENSE SECTION>
Input Offset Voltage (Note8)
Input Bias Current
V
Vm1=0V , Vm2 = 2.2V
-10
-1
-
3
10
1
mV
uA
ns
io(cs)
Ib
0V ≤ Vcs ≤ 1.7V
-0.1
200
(cs)
(cs)
Current Sense Delay to Output (Note11)
< ZERO CURRENT DETECT SECTION >
Input Voltage Threshold
td
-
500
Vth
HY
Vdet Increasing
-
1.7
0.2
2
2.3
0.8
1
V
V
(det)
Detect Hysteresis
0.5
(det)
Input Low Clamp Voltage
Input High Clamp Voltage
Input Bias Current
Vclamp(I) Idet = -100uA
Vclamp(h) Idet = 3mA
0.45 0.75
V
6.5
-1
7.2
7.9
1
V
Ib(det)
1V ≤ Vdet ≤ 5V
-0.1
uA
Input High/Low Clamp Diode Current
(Note12)
Iclamp(d)
-
-
-
±3
mA
< OUTPUT SECTION >
Output Voltage High
V
Io = -10mA
Io = 10mA
CI = 1nF
10.5
11
0.8
130
50
14
-
-
V
V
oh
Output Voltage Low
V
-
-
1
oI
tr
tf
Rising Time (Note13)
200
120
16
1
ns
ns
V
Falling Time (Note14)
CI = 1nF
-
Maximum Output Voltage
Output Voltage with UVLO Activated
< RESTART TIMER SECTION>
Restart Time Delay
Vomax(o) Vcc = 20V, Io = 100uA
Vomin(o) Vcc = 5V , Io = 100uA
12
-
V
td
Vm1 = 1V, Vm2 = 3.5V
-
150
-
us
(rst)
<OVER VOLTAGE PROTECTION SECTION>
Soft OVP Detecting Current
Dynamic OVP Detecting Current
Static OVP Threshold Voltage
I
-
25
35
30
40
35
45
uA
uA
V
sovp
I
-
dovp
Vovp
Vinv = 2.7V
2.1 2.25
2.4
Note 1 ~ 14: These parameters, although guaranteed, are not 100% tested in production.
Pin4_Threshold
Vm1 × (Vm2 – Vref)
------------------------------------------------------
Multiplier Gain: K =
......(Vm1 = Vpin3,Vm2 = Vpin2)
6
FAN7527B
Typical Performance Characteristics
2.0
2.0
Vm1=3.0V Vm1=2.5V Vm1=2.0V
Veao=4.25V Veao=4.0V Veao=3.75V
1.8
Vm1=3.5V
1.6
Veao=4.5V
Vm1=1.5V
Veao=3.5V
Veao=3.25V
Veao=3.0V
1.5
Vm1=4.0V
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Vm1=1.0V
1.0
Veao=2.75V
Vm1=0.5V
0.5
Veao=2.5V
5
Vm1=0V
5.0
0.0
2.0
2.5
3.0
3.5
4.0
4.5
0
1
2
3
4
EA Output Voltage(V)
Multiplier Input Voltage(V)
Figure 2. Multiplier Input Voltage
vs Current Sensing Threshold
Figure 1. Error Amplifier Output Voltage
vs Current Sensing Threshold
2.7
0.015
0.012
0.009
0.006
0.003
0.000
2.6
2.5
2.4
2.3
0
10
20
30
40
50
-25
0
25
50
75
100
125
℃
)
Supply Voltage(V)
Temperature (
Figure 4. Reference Voltage vs Temperature
Figure 3. Supply Current vs Supply Voltage
5
14
12
10
8
4
3
2
1
0
6
4
2
0
-25
0
25
50
75
100
125
-25
0
25
50
75
100
125
℃
Temperature (
)
℃
Temperature ( )
Figure 6. UV Lockout Hysteresis vs Temperature
Figure 5. Start-Up Threshold vs Temperature
7
FAN7527B
Typical Performance Characteristics (Continued)
100
0
90
80
70
60
50
40
30
20
10
0
-1
-2
-3
-4
-5
-25
0
25
50
75
100
125
-25
0
25
50
75
100
125
℃
Temperature (
)
℃
Temperature (
)
Figure 8. Error Amplifier Source Current
vs Temperature
Figure 7. Start-Up Supply Current vs Temperature
5
0.5
0.4
0.3
4
3
2
1
0
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
-25
0
25
50
75
100
125
-25
0
25
50
75
100
125
℃
Temperature (
)
℃
Temperature (
)
Figure 10. Error Amplifier Input Bias Current
vs Temperature
Figure 9. Error Amplifier Sink Current
vs Temperature
4.0
1.0
0.8
0.6
0.4
0.2
0.0
3.2
2.4
1.6
0.8
0.0
-25
0
25
50
75
100
125
-25
0
25
50
75
100
125
℃
℃
)
Temperature (
)
Temperature (
Figure 11. Multiplier Gain vs Temperature
Figure 12. ldet Threshold Voltage vs Temperature
8
FAN7527B
Typical Performance Characteristics (Continued)
1.0
0.8
0.6
0.4
0.2
0.0
500
450
400
350
300
250
200
150
100
50
0
-25
0
25
50
75
100
125
-25
0
25
50
75
100
125
℃
Temperature (
)
℃
Temperature(
)
Figure 13. ldet Input Hysteresis vs Temperature
Figure 14. Restart Time vs Temperature
2.0
5
1.6
1.2
0.8
0.4
0.0
4
3
2
1
0
-25
0
25
50
75
100
125
-25
0
25
50
75
100
125
℃
℃
)
Temperature (
)
Temperature (
Figure 15. Max.Mult.Output Voltage vs Temperature
Figure 16. Supply Current vs Temperature
9
FAN7527B
Mechanical Dimensions
Package
Dimensions in millimeters
8-DIP
6.40 ±0.20
0.252 ±0.008
#1
#4
#8
#5
3.30 ±0.30
0.130 ±0.012
5.08
0.200
MAX
7.62
0.300
3.40 ±0.20
0.134 ±0.008
0.33
MIN
0.013
10
FAN7527B
Mechanical Dimensions (Continued)
Package
Dimensions in millimeters
8-SOP
0.1~0.25
MIN
0.004~0.001
1.55 ±0.20
0.061 ±0.008
#8
#5
#1
#4
6.00 ±0.30
0.236 ±0.012
1.80
0.071
MAX
3.95 ±0.20
0.156 ±0.008
5.72
0.225
0.50 ±0.20
0.020 ±0.008
11
FAN7527B
Ordering Information
Product Number
FAN7527BN
Package
Operating Temperature
8-DIP
-25 ~ +125oC
FAN7527BM
8-SOP
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 ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant 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
reasonably 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 perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
8/23/02 0.0m 001
Stock#DSxxxxxxxx
2002 Fairchild Semiconductor Corporation
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