Fairchild FAN7527BM Fan7527b power factor correction controller Datasheet

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 1.0.2
©2003 Fairchild Semiconductor Corporation
FAN7527B
Internal Block Diagram
Vcc
8
2.5V Ref
+
−
11.5V
Vcc
Internal
Bias
UVLO
8.5V
7 OUT
Drive
Output
Timer R
Idet
+
−
5
7.2V
2V 1.5V
Q
Zero Current
Detector
Static OVP
40k
CS
S
4
8pF
+
−
+
−
R
Current Sense
Comparator
2.25V
Vref
Veao(L)=2.25V
1.8V
Vmo
MULT 3
Vm1
−
0 ~ 3.8V
Vm2
Multiplier
Vref~Vref+2.5V
OVP
Current
Detector
Vmo
K=
Vm1 ⋅ (Vm2 − Vref )
2
0.25V
+
6
2
GND
EA_OUT
Isovp=30uA
Idovp=40uA
+
−
Vref
Vea(-)
Error Amp
1 INV
FAN7527B
PIN Description
INV
1
8
Vcc
EA_OUT
2
7
OUT
MULT
3
6
GND
CS
4
5
ldet
(Top View)
Pin Number
Pin Name
Pin Function Description
1
INV
Inverting input of the error amplifier. the output of the boost converter
should be resistively divided to 2.5V and connected to this pin.
2
EA_OUT
The output of the error amplifier. a feedback compensation network is
placed between this pin and the INV pin.
3
MULT
4
CS
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.
5
ldet
Zero current detection input.
6
GND
The ground potential of all the pins.
7
OUT
Gate driver output. the push pull output stage is able to drive the
power MOSFET with peak current of 500mA.
8
Vcc
Supply voltage of driver and control circuits.
Input to the multiplier stage. the full-wave rectified ac voltage is
divided to less than 2V and is connected to this pin.
3
FAN7527B
Absolute Maximum Ratings (Ta=25°C)
Characteristics
Symbol
Value
Unit
VCC
30
V
Peak drive output current
IOH,IOL
±500
mA
Driver output clamping diodes Vo > Vcc or Vo < -0.3V
Supply voltage
lclamp
±10
mA
Detector clamping diodes
ldet
±10
mA
Error amp, multiplier and comparator input voltages
Vin
-0.3 to 6
V
Operating junction temperature
Tj
150
°C
Topr
-25 to 125
°C
Tstg
-65 to 150
°C
Operating temperature range
Storage temperature range
8-DIP
Power dissipation
1.1
Pd
8-SOP
W
0.8
Thermal Data
Characteristics
Thermal resistance junction-ambient Max.
Symbol
8-DIP
Value
110
Rθja
8-SOP
Unit
°C/W
150
Temperature Characteristics (-25°C ≤ Ta ≤ 125°C)
Characteristics
4
Symbol
Min.
Typ.
Max.
Unit
Temperature stability for reference voltage (Vref)
∆Vref
-
20
-
mV
Temperature stability for multiplier gain (K)
∆K/∆T
-
-0.2
-
%/°C
FAN7527B
Electrical Characteristics
VCC= 14V, -25°C ≤ Ta ≤ 125°C, unless otherwise stated.
Characteristics
Symbol
Test Condition
Min.
Typ.
Max.
Unit
10.5
11.5
12.5
V
2
3
4
V
10
60
100
uA
< UNDER VOLTAGE LOCKOUT SECTION>
Start threshold voltage
Vth(st)
UVLO hysteresis
HY(st)
Vcc Increasing
-
< SUPPLY CURRENT SECTION >
Start-up supply current
Ist
Vcc = Vth(st) -0.2V
Operating supply current
Icc
Output not switching
-
3
6
mA
Operating current at OVP
Icc(ovp)
Vinv = 3V
-
1.7
4
mA
50kHz, CI = 1nF
-
4
8
mA
Iref = 0mA, Ta = 25°C
2.465
2.5
2.535
V
-25 ≤ Ta ≤ 125°C
2.44
2.5
2.56
V
Dynamic operating supply current
Idcc
< ERROR AMPLIFIER SECTION >
Voltage feedback input threshold
Vref
Line regulation
∆Vref1
14V ≤ Vcc ≤ 25V
-
0.1
10
mV
Temperature stability of Vref (Note1)
∆Vref3
-25 ≤ Ta ≤ 125°C
-
20
-
mV
Input bias current
Ib(ea)
-0.5
-
0.5
uA
Output source current
Isource
Vm2 = 4V
-2
-4
-
mA
Isink
Vm2 = 4V
2
4
-
mA
Output sink current
-
Output upper clamp voltage (Note2)
Veao(H)
Isource = 0.1mA
-
6
-
V
Output lower clamp voltage (Note3)
Veao(L)
Isink = 0.1mA
-
2.25
-
V
Large signal open loop gain (Note4)
Gv
Power supply rejection ratio (Note5)
PSRR
Unity gain bandwidth (Note6)
GBW
SR
Slew rate (Note7)
-
60
80
-
dB
60
80
-
dB
-
-
1
-
MHz
-
-
0.6
-
V/us
14V ≤ Vcc ≤ 25V
< MULTIPLIER SECTION>
Input bias current (pin3)
Ib(m)
-
-0.5
-
0.5
uA
M1 input voltage range (pin3)
∆Vm1
-
0
-
3.8
V
M2 input voltage range (pin2)
∆Vm2
-
Vref
-
Vref+2.5
V
0.36
0.44
0.52
1/V
1.65
1.8
1.95
V
-
-0.2
-
%/°C
Multiplier gain (Note8)
Maximum multiplier output voltage
Temperature stability of K (Note9)
K
Vm1 = 1V, Vm2 = 3.5V
Vomax(m) Vinv =0V, Vm1 = 4V
∆K/∆T
-25 ≤ Ta ≤ 125°C
5
FAN7527B
Electrical Characteristics (Continued)
VCC= 14V, -25°C ≤ Ta ≤ 125°C, unless otherwise stated.
Characteristics
Symbol
Test Condition
Min.
Typ.
Max.
Unit
< CURRENT SENSE SECTION>
Input offset voltage (Note8)
Vio(cs)
Vm1=0V , Vm2 = 2.2V
-10
3
10
mV
Input bias current
Ib(cs)
0V ≤ Vcs ≤ 1.7V
-1
-0.1
1
uA
Current sense delay to output (Note11)
td(cs)
-
200
500
ns
1.7
2
2.3
V
-
0.2
0.5
0.8
V
Idet = -100uA
0.45
0.75
1
V
6.5
7.2
7.9
V
-1
-0.1
1
uA
-
-
±3
mA
10.5
11
-
V
-
< ZERO CURRENT DETECT SECTION >
Input voltage threshold
Vth(det)
Detect hysteresis
HY(det)
Vdet increasing
Input low clamp voltage
Vclamp(I)
Input high clamp voltage
Vclamp(h) Idet = 3mA
Input bias current
Ib(det)
1V ≤ Vdet ≤ 5V
Input high/low clamp diode current (Note12) Iclamp(d)
-
< OUTPUT SECTION >
Output voltage high
Voh
Output voltage low
VoI
Io = -10mA
Io = 10mA
-
0.8
1
V
Rising time (Note13)
tr
CI = 1nF
-
130
200
ns
Falling time (Note14)
tf
CI = 1nF
-
50
120
ns
Maximum output voltage
Vomax(o)
Vcc = 20V, Io = 100uA
12
14
16
V
Output voltage with UVLO activated
Vomin(o)
Vcc = 5V , Io = 100uA
-
-
1
V
td(rst)
Vm1 = 1V, Vm2 = 3.5V
-
150
-
us
< RESTART TIMER SECTION>
Restart time delay
<OVER VOLTAGE PROTECTION SECTION>
Soft OVP detecting current
Isovp
-
25
30
35
uA
Dynamic OVP detecting current
Idovp
-
35
40
45
uA
Static OVP threshold voltage
Vovp
2.1
2.25
2.4
V
Vinv = 2.7V
Note 1 ~ 14: These parameters, although guaranteed, are not 100% tested in production.
Pin4_Threshold
Multiplier Gain: K = ------------------------------------------------------- ...... ( Vm1 = Vpin3,Vm2 = Vpin2 )
Vm1 × ( Vm2 – Vref )
6
FAN7527B
Typical Performance Characteristics
Fig.2 Multiplier Input Voltage vs. C.S. Threshold
Fig.1 E.A. Output Voltage vs. C.S. Threshold
2.0
2.0
Vm1=3.0V Vm1=2.5V Vm1=2.0V
CS Threshold Voltage(V)
Vm1=1.5V
1.5
C.S. Threshold Voltage(V)
CS
Threshold
C.S
Threshold Voltage(V)
Voltage(V)
Veao=4.25V Veao=4.0V Veao=3.75V
1.8
Vm1=3.5V
Vm1=4.0V
Vm1=1.0V
1.0
Vm1=0.5V
0.5
1.6
Veao=4.5V
Veao=3.5V
Veao=3.25V
1.4
1.2
Veao=3.0V
1.0
0.8
Veao=2.75V
0.6
0.4
Veao=2.5V
0.2
Vm1=0V
0.0
0.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
1
EA Output Voltage(V)
2
3
4
5
Multiplier Input Voltage(V)
Figure 2. Multiplier Input Voltage
vs Current Sensing Threshold
Figure 1. Error Amplifier Output Voltage
vs Current Sensing Threshold
Fig.4 Reference Voltage vs. Temperature
Fig.3 Supply Current vs. Supply Voltage
2.7
0.015
0.012
Reference Voltage(V)
Supply Current(A)
2.6
0.009
0.006
2.5
2.4
0.003
2.3
0.000
0
10
20
30
40
-25
50
0
25
50
75
100
125
Temperature (℃)
Supply Voltage(V)
Figure 4. Reference Voltage vs Temperature
Figure 3. Supply Current vs Supply Voltage
Fig.6 UV Lockout Hysteresis vs. Temperature
Fig.5 Start-up Threshold vs. Temperature
5
14
4
UV Lockout Hyteresis(V)
Startup Threshold(V)
12
10
8
6
4
3
2
1
2
0
0
-25
0
25
50
75
100
Temperature (℃)
Figure 5. Start-Up Threshold vs Temperature
7
125
-25
0
25
50
75
100
Temperature (℃)
Figure 6. UV Lockout Hysteresis vs Temperature
125
FAN7527B
Typical Performance Characteristics (Continued)
Fig.7 Start-up Supply Current vs. Temperature
Fig.8 E.A. Source CurrenT vs. Temperature
100
0
90
-1
EA Source Current(mA)
Start-up Supply Current(uA)
80
70
60
50
40
30
20
-2
-3
-4
10
0
-5
-25
0
25
50
75
100
125
-25
0
25
Temperature (℃)
50
75
100
125
100
125
Temperature (℃)
Figure 8. Error Amplifier Source Current
vs Temperature
Figure 7. Start-Up Supply Current vs Temperature
Fig.10 E.A. Input Bias Current vs. Temperature
Fig.9 E.A. Sink Current vs. Temperature
0.5
5
0.4
0.3
EA Input Bias Current(uA)
EA Sink Current(mA)
4
3
2
1
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
0
-25
0
25
50
75
100
-25
125
0
25
Fig.12 Idet Threshold Voltage vs. Temperature
Fig.11 Multiplier Gain vs. Temperature
1.0
4.0
0.8
3.2
Idet Threshold Voltage(V)
Multiplier Gain(1/V)
75
Figure 10. Error Amplifier Input Bias Current
vs Temperature
Figure 9. Error Amplifier Sink Current
vs Temperature
0.6
0.4
0.2
0.0
2.4
1.6
0.8
0.0
-25
0
25
50
75
100
Temperature (℃)
Figure 11. Multiplier Gain vs Temperature
8
50
Temperature (℃)
Temperature (℃)
125
-25
0
25
50
75
100
Temperature (℃)
Figure 12. ldet Threshold Voltage vs Temperature
125
FAN7527B
Typical Performance Characteristics (Continued)
Fig.13 Idet Input Hysteresis vs. Temperature
1.0
500
450
400
350
Restart Time(us)
Idet Input Hysteresis(mV)
0.8
0.6
0.4
0.2
300
250
200
150
100
50
0.0
-25
0
25
50
75
100
125
0
-25
0
25
Temperature (℃)
Figure 13. ldet Input Hysteresis vs Temperature
75
100
125
Figure 14. Restart Time vs Temperature
Fig.15 Max. Mult. Output Voltage vs. temperature
Fig.16 Supply Current vs. Temperature
2.0
5
1.6
4
Supply Current(mA)
Maximum Mult. Output Voltage(V)
50
Temperature(℃)
1.2
0.8
3
2
1
0.4
0
0.0
-25
0
25
50
75
100
Temperature (℃)
Figure 15. Max.Mult.Output Voltage vs Temperature
125
-25
0
25
50
75
100
125
Temperature (℃)
Figure 16. Supply Current vs Temperature
9
FAN7527B
Mechanical Dimensions
Package
Dimensions in millimeters
#5
1.524 ±0.10
0.060 ±0.004
#4
0.018 ±0.004
#8
2.54
0.100
9.60
MAX
0.378
#1
9.20 ±0.20
0.362 ±0.008
(
6.40 ±0.20
0.252 ±0.008
0.46 ±0.10
0.79
)
0.031
8-DIP
5.08
MAX
0.200
7.62
0.300
3.40 ±0.20
0.134 ±0.008
+0.10
0.25 –0.05
+0.004
0~15°
10
0.010 –0.002
3.30 ±0.30
0.130 ±0.012
0.33
MIN
0.013
FAN7527B
Mechanical Dimensions (Continued)
Package
Dimensions in millimeters
8-SOP
Symbol
Min
Nom
Max
A
-
-
1.75
A1
0.10
0.15
0.25
A2
1.25
1.45
1.50
B
0.35
0.37
0.51
C
0.19
0.20
0.25
D
4.80
4.90
5.00
E
3.80
3.90
4.00
e
1.27BSC
H
5.79
5.99
6.20
h
0.25
-
0.50
L
0.50
0.70
0.90
GP
0.36 BSC
q
0
-
8
aaa
-
-
0.25
bbb
-
-
0.10
11
FAN7527B
Ordering Information
Product Number
Package
FAN7527BN
8-DIP
FAN7527BM
8-SOP
Operating Temperature
-25 ~ +125oC
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.
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 2003 Fairchild Semiconductor Corporation
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