Fairchild FAN7601BM Green current mode pwm controller Datasheet

FAN7601B
Green Current Mode PWM Controller
Features
Description
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The FAN7601B is a programmable frequency green
current mode PWM controller. It is specially designed for
the offline adapter applications and the auxiliary power
supplies that require high efficiency at light load and no
load. The internal high-voltage startup switch and burst
mode reduce the power loss.
Green Current Mode PWM Control
Low Operating Current: Maximum 4mA
Burst Mode Operation
Internal High-Voltage Startup Switch
Under-Voltage Lockout (UVLO): 12V/8V
Latch Protection and Soft-Start Function
Over-Voltage Protection: 19V
Operating Frequency up to 300kHz
Maximum Duty Cycle: 95%
Applications


FAN7601B includes protections, such as latch protection
and over-voltage protection. The latch protection can be
used for over-voltage protection, thermal protection, and
others. The soft-start prevents the output voltage
overshoot at startup.
Offline Adapter Applications
Auxiliary Power Supplies
Related Resources

AN4129 — Green Current Mode PWM
Controller FAN7601
Ordering Information
Part Number
Operating
Junction
Temperature
FAN7601BM
FAN7601BMX
FAN7601BGX
© 2008 Fairchild Semiconductor Corporation
FAN7601B • Rev. 1.0.3
-40°C to +150°C
Top Mark
Package
Packing Method
7601B
8-SOP
Rail
7601B
8-SOP
Tape & Reel
7601B
10-SSOP
Tape & Reel
www.fairchildsemi.com
FAN7601B — Green Current Mode PWM Controller
May 2012
VREF (10)
8
VSTR (1)
1
7
5V Ref
Rt/Ct
(5)
4
Enable
+
−
OVP
Startup
Circuit
VCC
(8)
19V
OSC
UVLO
VREF
+
−
12V/8V
12µA
Latch/SS
3
(4)
1.5V
S
Q
R
6 OUT
(7)
OVP
+
−
S
Q
R
2.5V
1V
GND
(6)
+
−
Startup
Circuit
+
−
Delay
Circuit
Reset
Circuit
+
−
−
5
2 CS/FB
(3)
0.97V/0.9V
Latch/SS
1V
Figure 1. Internal Block Diagram
Note:
1. ( ) is 10-SSOP Pin Number.
© 2008 Fairchild Semiconductor Corporation
FAN7601B • Rev.1.0.3
www.fairchildsemi.com
2
FAN7601B — Green Current Mode PWM Controller
Block Diagram
Figure 2. 8-Pin Configuration (Top View)
Figure 3. 10-Pin Configuration (Top View)
Pin Definitions
Pin # (8-Pin)
Pin # (10-Pin)
Name
1
1
VSTR
2
3
CS/FB
3
4
Latch/SS
4
5
Rt/Ct
Oscillator Timing
5
6
GND
Ground
6
7
Out
Gate Drive Output
7
8
VCC
IC Power Supply
8
10
VREF
Voltage Reference
© 2008 Fairchild Semiconductor Corporation
FAN7601B • Rev.1.0.3
Description
Startup
Current Sense and Feedback
Latch Protection and Soft-Start
www.fairchildsemi.com
3
FAN7601B — Green Current Mode PWM Controller
Pin Configurations
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
20
V
VCS/FB
Input Voltage CS/FB
-0.3
20.0
V
TSTG
Storage Temperature
-55
+150
°C
Recommended Operating Junction Temperature
-40
+150
°C
TJ
IO
Supply Voltage
Output Current
250
mA
VSTR
VSTR Input Voltage
500
V
ESD
Electrostatic Discharge
Capability
Human Body Model, JESD22-A114
2000
Charged Device Model, JESD22-C101
1500
V
Thermal Impedance
Symbol
θJA
Parameter
Thermal Resistance, Junction-to-Ambient
© 2008 Fairchild Semiconductor Corporation
FAN7601B • Rev.1.0.3
Value
8-SOP
180
10-SSOP
130
Unit
°C/W
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4
FAN7601B — Green Current Mode PWM Controller
Absolute Maximum Ratings
TA=-25°C~125°C, VCC=14V, RT=9.5kΩ, CT=2.2nF unless otherwise specified.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
4.85
5.00
5.15
V
Reference Section
VREF
Reference Output Voltage
IO=1mA
ΔVREF1
Line Regulation
VCC=10V~18V
10
20
mV
ΔVREF2
Load Regulation
IO=1mA ~ 10mA
20
30
mV
100
110
kHz
1.5
%
Oscillator Section
fOSC
Initial Accuracy
90
STV
Voltage Stability
VCC=10V~18V
1.0
VOSC
Amplitude
Vpin4 peak-to-peak
1.25
V
PWM Section
VCS/FB1
CS/FB Threshold Voltage1
DMAX
Maximum Duty Cycle
DMIN
Minimum Duty Cycle
TA=25°C
0.9
1.0
1.1
V
92
95
98
%
0
%
Burst Mode Section
VCS/FB2
CS/FB Threshold Voltage2(2)
VCS/FB3
(2)
CS/FB Threshold Voltage3
0.77
0.97
1.17
V
0.7
0.9
1.1
V
9
12
15
μA
1.2
1.5
1.8
V
2.25
2.50
2.75
V
18
19
20
V
Soft-Start Section
ISS
VSL
Soft-Start Current
Vpin3=GND
(3)
Soft-Start Limit Voltage
ISS=1μA
Protection Section
VLATCH
VOVP
Latch Voltage
Over-Voltage Protection
UVLO Section
VtH
Start Threshold Voltage
11
12
13
V
VtL
Minimum Operating Voltage
7
8
9
V
3
4
mA
2.0
2.5
V
12.0
14.0
V
TA=25°C, CI=1nF
45
150
ns
TA=25°C, CI=1nF
35
150
ns
1.0
1.5
mA
Total Current Section
IOP
Operating Supply Current
Output Section
VOL
Low Output Voltage
TA=25°C, IO=100mA
VOH
High Output Voltage
TA=25°C, IO=-100mA
(2)
tr
Rising Time
tf
Falling Time(2)
11.5
Startup Section
Istr
VSTR Startup Current
VSTR=30V, TA=25°C
0.5
Notes:
2. These parameters, although guaranteed, are not 100% tested in production.
3. It is recommended to connect a 1MΩ resistor between the Latch/SS pin and GND to prevent abnormal operation of
the latch protection by noise coupling.
© 2008 Fairchild Semiconductor Corporation
FAN7601B • Rev.1.0.3
www.fairchildsemi.com
5
FAN7601B — Green Current Mode PWM Controller
Electrical Characteristics
3
5.03
2.5
Supply Cur r ent I cc
(mA)
Vref
(V)
5.05
5.01
2
1.5
4.99
4.97
1
0.5
0
4.95
-45 -25 -15
0
25
50
-45 -25 -15
80 100 125 140
Figure 4. Trimmed Reference Voltage
Vcc Stop Thr eshold VtL
(V)
Vcc Star t Thr eshold VtH
(V)
50
80
100 125 140
9
12.5
12
11.5
11
10.5
10
-45 -25 -15
0
25
50
8.5
8
7.5
7
-45 -25 -15
80 100 125 140
0
25
50
80 100 125 140
Junction Temperature(℃)
Junction Temperature(℃)
Figure 6. VCC Start Threshold Voltage
Figure 7. VCC Stop Threshold Voltage
110
100
Maximum Duty Cycle Dmax
(%)
Oscillator Frequency Fosc
(KHz)
25
Figure 5. Supply Current
13
105
100
95
90
85
-45 -25 -15
0
25
50
80
98
96
94
92
90
-45 -25 -15
100 125 140
0
25
50
80 100 125 140
Junction Temperature(℃)
Junction Temperature(℃)
Figure 8. Oscillator Frequency
Figure 9. Maximum Duty Cycle
1.35
O scillator L ow Thr eshold Vr L
(V)
2.7
O scillator High Thr eshold Vr H
(V)
0
Junction Temperature(℃)
Junction Temperature(℃)
2.6
2.5
2.4
2.3
-45 -25 -15
0
25
50
80
1.25
1.2
1.15
-45 -25 -15
100 125 140
0
25
50
80
100 125 140
Junction Temperature(℃)
Junction Temperature(℃)
Figure 10. Oscillator High Threshold Voltage
© 2008 Fairchild Semiconductor Corporation
FAN7601B • Rev.1.0.3
1.3
Figure 11. Oscillator Low Threshold Voltage
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6
FAN7601B — Green Current Mode PWM Controller
Typical Performance Characteristics
20
Over Voltage Protection Vovp
(V)
Star t up Cur r ent Istr
(mA)
2
1.6
1.2
0.8
0.4
0
-45 -25 -15 0
25 50 80 100 125 140
Junction Temperature(℃)
19.2
18.8
18.4
18
-45 -25 -15 0
25 50 80 100 125 140
Junction Temperature(℃)
Figure 12. Startup Current
Figure 13. Over-Voltage Protection Level
2.8
14
2.7
Soft Start Curren t Isof
(uA)
Latch Protection Vlatch
( V)
19.6
2.6
2.5
2.4
2.3
13
12
11
10
9
2.2
-45 -25 -15 0
25 50 80 100 125 140
Junction Temperature(℃)
-45 -25 -15 0
25 50 80 100 125 140
Junction Temperature( ℃)
Figure 14. Latch Protection Voltage
Figure 15. Soft-Start Current
1000
Ct=
Frequen cy[KHz]
10nF
8.2nF
100
4.7nF
3.3nF
2.2nF
1nF
820pF
10
680pF
1
5K
15K
25K
Rt[Kohm]
35K
45K
Figure 16. Oscillator Frequency Characteristic
© 2008 Fairchild Semiconductor Corporation
FAN7601B • Rev.1.0.3
www.fairchildsemi.com
7
FAN7601B — Green Current Mode PWM Controller
Typical Performance Characteristics (Continued)
5.00
4.80
A
0.65
3.81
8
5
B
6.20
5.80
PIN ONE
INDICATOR
1.75
4.00
3.80
1
5.60
4
1.27
(0.33)
0.25
M
1.27
C B A
LAND PATTERN RECOMMENDATION
SEE DETAIL A
0.25
0.10
1.75 MAX
0.25
0.19
C
0.10
0.51
0.33
0.50 x 45°
0.25
R0.10
C
OPTION A - BEVEL EDGE
GAGE PLANE
R0.10
OPTION B - NO BEVEL EDGE
0.36
NOTES: UNLESS OTHERWISE SPECIFIED
8°
0°
0.90
0.406
A) THIS PACKAGE CONFORMS TO JEDEC
MS-012, VARIATION AA, ISSUE C,
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS DO NOT INCLUDE MOLD
FLASH OR BURRS.
D) LANDPATTERN STANDARD: SOIC127P600X175-8M.
E) DRAWING FILENAME: M08AREV13
SEATING PLANE
(1.04)
DETAIL A
SCALE: 2:1
Figure 17. 8-Lead, Small Outline Package (SOP)
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the
warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
© 2008 Fairchild Semiconductor Corporation
FAN7601B • Rev.1.0.3
www.fairchildsemi.com
8
FAN7601B — Green Current Mode PWM Controller
Physical Dimensions
5.12
4.72
0.65
4.00
10
6
1.75
6.30
5.70
5
(1.00)
#1
PIN ONE
INDICATOR
5.60
4.15
3.75
#1
TOP VIEW
(1.00)
LAND PATTERN RECOMMENDATION
SEE DETAIL A
R0.20
0.30
0.15
1.80 MAX
0.25
0.10
(0.26)
0.506
0.306
SIDE VIEW
END VIEW
R0.15
GAGE PLANE
R0.15
NOTES:
A) NO DRAWING STANDARD APPLIES TO THIS PACKAGE
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD FLASH,
AND TIE BAR EXTRUSIONS.
0.70
D) LAND PATTERN RECOMMENDATION IS FSC SOURCED.
E) DRAWING FILE NAME AND REVISION : MKT-MSB10A,REV1 0.30
(0.36)
8¡Æ
SEATING PLANE
(2.04)
DETAIL A
SCALE: 2:1
Figure 18. 10-Lead, Small Outline Package (SSOP)
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the
warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
© 2008 Fairchild Semiconductor Corporation
FAN7601B • Rev.1.0.3
www.fairchildsemi.com
9
FAN7601B — Green Current Mode PWM Controller
Physical Dimensions
FAN7601B — Green Current Mode PWM Controller
© 2008 Fairchild Semiconductor Corporation
FAN7601B • Rev.1.0.3
www.fairchildsemi.com
10
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