FAIRCHILD SG684965TZ

SG6849
Low-Power, Green-Mode PWM Flyback Power Controller
without Secondary Feedback
Features
Description
ƒ Linearly Decreasing PWM Frequency
ƒ Green-Mode Under Light-Load and Zero-Load
This highly integrated PWM controller provides several
features to enhance the performance of low-power
flyback converters. To minimize standby power
consumption, the proprietary green-mode function
provides off-time modulation to linearly decrease the
switching frequency under light-load and zero-load
conditions. This green-mode function enables the
power supply to meet international power conservation
requirements.
Conditions
ƒ Constant Voltage (CV) and Constant Current (CC)
ƒ No Secondary Feedback
ƒ Low Startup Current: 5μA
ƒ Low Operating Current: 3.6mA
ƒ Leading-Edge Blanking (LEB)
ƒ Constant Power Limit
ƒ Universal AC Input Range
ƒ Synchronized Slope Compensation
ƒ 150°C OTP Sensor with Hysteresis
ƒ VDD Over-Voltage Clamping
ƒ Cycle-by-Cycle Current Limiting
ƒ Under-Voltage Lockout (UVLO)
ƒ Fixed PWM Frequency: 65kHz
ƒ Gate Output Maximum Voltage Clamped at 16.7V
ƒ Small SSOT-6 Package
Applications
Low-power, flyback power converters, such as:
ƒ Battery chargers for cellular phones, cordless
phones, PDAs, digital cameras, and power tools
ƒ Power adapters for ink jet printers, video game
consoles, and portable audio players
The supply voltage VDD is also used for feedback
compensation to regulate the output voltage without
requiring a conventional TL431 and a photo-coupler. An
advantage of the SG6849 is a typical startup current of
only 5µA, while the typical operating current can be as
low as 3.6mA. A large startup resistance can be used to
achieve even higher power conversion efficiency.
Built-in synchronized slope compensation maintains the
stability of peak current-mode control. Proprietary
internal compensation ensures constant output power
limiting over a universal range of AC input voltages,
from 90VAC to 264VAC.
The SG6849 provides many protection functions. Pulseby-pulse current limiting ensures a constant output
current, even if a short circuit occurs. The internal
protection circuit disables PWM output if VDD exceeds
22.7V. The gate output is clamped at 16.7V to protect
the power MOS from over-voltage damage. The built-in
over-temperature protection (OTP) function shuts down
the controller at 150°C with a 20°C hysteresis.
The SG6849 is designed to provide a low-cost total
solution for flyback converters. It is available in a small
footprint, 6-pin, SSOT-6 package.
ƒ Open-frame SMPS for TV/DVD standby and other
auxiliary supplies, home appliances, consumer
electronics, and PC 5V standby-power
ƒ Replacements for linear transformers and RCC
SMPS
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
Related Resources
ƒ
AN-6849 - Low Cost, Green-Mode PWM Controller
for Flyback Converters
www.fairchildsemi.com
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
December 2008
Part
Number
Operating
Temperature Range
SG684965TZ
-40°C to +105°C
Small SOT-26 Package
RoHS
Tape & reel
SG684965DZ
-40°C to +105°C
8-pin Dual in-line Package (DIP)
RoHS
Tube
SG684965DY
-40°C to +105°C
8-pin Dual in-line Package (DIP)
Green
Tube
Package
Eco Status
Packing Method
For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
Application Diagram
V IN
DO
RIN
D1
VDD
GATE
CIN
CO
VO
W AUX
Q1
SENSE
GND
RS
Figure 1. Typical Application
Internal Block Diagram
GND
8(1)
V DD
OTP
SENSE
Internal
Supply
OSC
Driver
S
R
VDD 2(5)
Q
PWM
Comp
V DD
Power
Limi ter
Slope
Compensation
UVLO
OCP
Comp
17V/8V
1(6) GATE
Green
Mode
Controller
Blanking
Circuit
4(4) SENSE
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Ordering Information
4.5V
Σ
7(2) FB
VDD
VDDZ
Figure 2. Functional Block Diagram
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
www.fairchildsemi.com
2
XX: BB=SG6849-65T
TT : Die Run Code
. . . : Year Code
- - - : Week Code
*Marking for SG684965TZ (Pb-free)
T: D=DIP
P: Z= Lead free + RoHS Compatible
Null=Regular Package
XXXXXXXX: Wafer Lot
Y: Year
WW: Week
V: Assembly location
*Marking for SG684965DZ (Pb-free)
F- Fairchild Logo
Z- Plant Code
X- 1 Digit Year Code
Y- 1 Digit Week Code
TT: 2 Digits Die Run Code
T: Package Type (D=DIP)
P: Z: Pb-free, Y: Green package
M: Manufacture Flow Code
ZXYTT
DXYTT
684965
TPM
*Marking for SG684965DY (Green Compound)
Figure 3.
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Marking Information
Top Mark
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3
Figure 4.
SSOT-6 Pin Configuration
Figure 5.
DIP-8 Pin Configuration
Pin Definitions
DIP
Pin #
SSOT
Pin #
Name
Description
1
6
GATE
The totem-pole output driver for driving the power MOSFET.
2
5
VDD
Power supply.
NC
No connection.
3
Current sense. It senses the voltage across a sensed resistor. To provide overcurrent protection, PWM output is disabled if the voltage exceeds an internal
threshold. This pin provides current information for current-mode control.
4
4
SENSE
5
3
NC
No connection.
NC
No connection.
Feedback. The FB pin provides feedback information to the internal PWM
comparator. This feedback is used to control the duty cycle. When no feedback is
provided, this pin is left open.
6
7
2
FB
8
1
GND
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
Ground.
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Pin Configurations
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4
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
Parameter
Min.
(1, 2)
Max.
Unit
25
V
VVDD
DC Supply Voltage
VFB
Input Voltage to FB Pin
-0.3
7.0
V
Input Voltage to Sense Pin
-0.3
7.0
V
TJ
Operating Junction Temperature
-40
+125
°C
ΘJA
Thermal Resistance (Junction-to-Air)
SSOT
263.3
°C/W
DIP
135.7
°C/W
TSTG
Storage Temperature Range
+150
°C
VSENSE
TL
ESD
-55
+260
°C
Human Body Model, JEDEC:JESD22-A114
3.0
kV
Machine Model, JEDEC:JESD22-C101
300
V
Lead Temperature (Wave Soldering or IR, 10 Seconds)
Notes:
1. All voltage values, except differential voltages, are given with respect to GND pin.
2. Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device.
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Absolute Maximum Ratings
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5
Unless otherwise noted, VDD=15V and TA=25°C.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
VDD Section
VDD-ON
Turn-on Threshold Voltage
16
17
18
V
VDD-OFF
Turn-off Threshold Voltage
7.5
8.0
8.5
V
5
20
μA
IDD-ST
Startup Current
VDD=15V
IDD-OP
Operating Supply Current
VDD=15V, CL=1nF
3.6
4.6
mA
IDD=10mA
28
30
V
VDD-CLAMP Zener Diode Breakdown Voltage
VDD-TH-G
VDD-Low Threshold Voltage for Exiting
Green-Mode OFF
VDD-
OFF+1.0
VDD-
VDD-
OFF+1.5
OFF+2.0
1.15
1.40
V
Feedback Input Section
IFB-ZDC
VFB-OPEN
ZFB
VDD-FB
Zero Duty Cycle FB Input Current
Open-Loop Voltage
4.5
Input Impedance
VDD Feedback Threshold Voltage*
V
2.4
IFB=0.1mA to 0.2mA
mA
kΩ
FB is Open
20.0
22.7
25.0
V
IFB=0.4mA
18
20
22
V
Current-Sense Section
tPD
VSTHVA
tLEB
Delay to Output
100
Valley Threshold Voltage for Current Limit
VDD=20V
0.84
0.89
0.94
V
VDD=15V
0.72
0.77
0.82
V
VDD=10V
0.58
0.63
0.68
V
Leading-Edge Blanking Time
310
Figure 6.
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
ns
ns
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Electrical Characteristics
Saw Limit
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6
Unless otherwise noted, VDD=15V and TA=25°C.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
Oscillator Section
Frequency
60
65
70
kHz
fOSC-G
fOSC
Green-Mode Frequency
20
25
30
kHz
IFB-G
Green-Mode Ending FB Current
0.90
1.15
1.40
mA
2.00
%
80
%
1.5
V
fDV
Frequency Variation vs. VDD Deviation
VDD=10 to 20V
Output Section
DCYMAX
Maximum Duty Cycle
VGATE-L
Output Voltage Low
VDD=15V, Io=10mA
VGATE-H
Output Voltage High
VDD=15V, Io=10mA
tr
Rising Time
VDD=15V, CL=1nF
200
ns
tf
Falling Time
VDD=15V, CL=1nF
80
ns
Output Clamp Voltage
VDD=20V
VGATECLAMP
70
75
8
V
16.7
18.0
V
Over-Temperature Protection (OTP)
TOTP
TOTPRESTART
Protection Junction Temperature
+150
°C
Restart Junction Temperature
+130
°C
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Electrical Characteristics (Continued)
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7
9.00
18.0
17.5
8.50
V DD OFF (V)
16.5
VDD
ON (V)
17.0
16.0
8.00
7.50
15.5
15.0
7.00
-40 -25 -10
5
20
35
50
65
80
95 110 125
-40
-25
-10
5
Figure 7. Turn-on Threshold Voltage (VDD-ON)
vs. Temperature
35
50
65
80
95
110 125
Figure 8. Turn-off Threshold Voltage (VDD-OFF)
vs. Temperature
4.5
8.0
4.3
7.0
4.0
(mA)
9.0
3.8
OP
6.0
IDD
I DD ST (µA)
20
Temperature (°C)
Temperature (°C)
5.0
3.5
3.3
4.0
3.0
3.0
-40
-25
-10
5
20
35
50
65
80
95
-40
110 125
-25
-10
5
20
35
50
65
80
95
110 125
Temperature (°C)
Temperature (°C)
Figure 9. Startup Current (IDD-ST) vs. Temperature
Figure 10. Center Frequency (fOSC) vs. Temperature
80.0
70.0
78.0
DC Y MAX (%)
fOSC (kHz)
65.0
60.0
55.0
76.0
74.0
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Typical Performance Characteristics
72.0
50.0
70.0
-40
-25
-10
5
20
35
50
65
80
95
-40
110 125
Figure 11. Center Frequency (fOSC) vs. Temperature
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
-25
-10
5
20
35
50
65
80
95
110 125
Temperature (°C)
Temperature (°C)
Figure 12. Maximum Duty Cycle (DCYMAX)
vs. Temperature
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8
0.80
4.8
0.78
4.6
0.76
V TH,VA(V)
V FB (V)
5.0
4.4
4.2
0.74
0.72
4.0
-40
-30
-15
0
25
50
75
100
0.70
125
-40
-25
-10
5
20
Temperature (°C)
35
50
65
80
95
110
125
Temperature (°C)
Figure 13. FB Open-Loop Voltage (VFB)
vs. Temperature
Figure 14. Valley Threshold Voltage (VSTHVA)
vs. Temperature
30.0
0.40
f OSC-G-BK
25.0
fOSC (kHz)
V GATE-L (V)
0.30
0.20
20.0
15.0
10.0
0.10
5.0
f OSC-G-OFF
0.00
0.0
-40
-25
-10
5
20
35 50 65
Temperature (°C)
80
95
110 125
8
9
9.5
10
V DD (V)
Figure 15. Output Voltage Low (VGATE-L)
vs. Temperature
Figure 16. Green-Mode Burst Back and Green-Mode
Off Frequency vs. VDD
1.10
1.00
0.90
1.05
0.80
V LIMIT (V)
V TH,VA (V)
8.5
0.70
1.00
0.95
0.60
0.50
9
10
11
12
13
14
15
16
17
18
19
0.90
20
10
VDD (V)
15
20
25
30
35
Duty Cycle (%)
Figure 17. Valley Threshold Voltage (VSTHVA) vs. VDD
Figure 18. VLIMIT Ramp vs. Duty Cycle
120
40
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Typical Performance Characteristics (Continued)
VDD Zener Current (mA)
100
80
60
40
20
0
26.0
26.5
27.0
27.5
28.0
28.5
29.0
29.5
30.0
VDD Zener Clamp Voltage (V)
Figure 19. VDD Zener Current vs. Zener Clamp Voltage
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
www.fairchildsemi.com
9
SG6849 devices integrate many useful functions for
low-power switch-mode power supplies. The following
descriptions highlight the key features of the SG6849.
VDD Over-Voltage Clamping
VDD over-voltage clamping is built in to prevent damage
from over-voltage conditions. When VDD exceeds 22.7V,
PWM output is shut down. Over-voltage conditions may
be caused by an open photo-coupler loop or a short
circuit in the output.
Startup Current
The required startup current is only 5μA. This allows a
high-resistance, low-wattage startup resistor to be used
to supply the controller’s startup power. A 1.5MΩ/0.25W
startup resistor can be used over a wide input range
(90VAC-264VAC) with very little power loss.
Oscillator Operation
The oscillation frequency is fixed at 65kHz.
Leading-Edge Blanking (LEB)
Operating Current
Each time the power MOSFET is switched on, a turn-on
spike occurs at the sense resistor. To avoid premature
termination of the switching pulse, a 310ns leadingedge blanking time is built in. Conventional RC filtering
is not necessary. During this blanking period, the
current-limit comparator is disabled and it cannot switch
off the gate drive.
The operating current is normally 3.6mA. The low
operating current results in higher efficiency and
reduces the required VDD hold-up capacitance. A
10μF/25V VDD hold-up capacitor can be used over a
wide input range (90VAC -264VAC) with little power loss.
Green-Mode Operation
Constant Output Power Limit
The proprietary green-mode function provides off-time
modulation to linearly decrease the switching frequency
under light-load and zero-load conditions. The on-time
is limited to provide better protection against brownouts
and other abnormal conditions.
When the SENSE voltage across the sense resistor RS
reaches the threshold voltage (around 1.0V), the output
GATE drive is turned off following a small propagation
delay tPD. This propagation delay introduces an
additional current proportional to tPD•VIN/LP. The
propagation delay is nearly constant regardless of the
input line voltage VIN. Higher input line voltages result in
larger additional currents. Under high input-line
voltages, the output power limit is higher than under low
input-line voltages.
This green-mode function dramatically reduces power
consumption under light-load and zero-load conditions.
Power supplies using SG6849 can meet international
restrictions regarding standby power-consumption.
Constant Voltage (CV) and Constant
Current (CC) without Feedback
Over a wide range of AC input voltages, the variation
can be significant. To compensate for this, the threshold
voltage is adjusted by adding a positive ramp (VLIMITramp). This ramp signal varies from 0.77V to 1.05V for
SG6849 and it flattens out at 1.05V. A smaller threshold
voltage forces the output GATE drive to terminate
earlier, reducing total PWM turn-on time and making the
output power equal to that of the low line input. This
proprietary internal compensation feature ensures a
constant output power limit over a wide range of AC
input voltages (90VAC-264VAC).
The SG6849 tightly regulates the output voltage and
provide over-current protection without requiring
secondary-side feedback signals. For improved CV and
CC accuracy, the transformer leakage inductance
should be reduced as much as possible.
Over-Temperature Protection (OTP)
The SG6849 has a built-in temperature sensing circuit
to shut down PWM output once the junction
temperature exceeds 150°C. While PWM output is shut
down, the VDD voltage gradually drops to the UVLO
voltage. Some of the SG6849’s internal circuits are shut
down and VDD gradually starts increasing again. When
VDD reaches 17V, all the internal circuits, including the
temperature sensing circuit, starts operating normally. If
the junction temperature is still higher than 150°C, the
PWM controller is shut down immediately. This situation
continues until the temperature drops below 130°C. The
PWM output then turns back on. The temperature
hysteresis window for the OTP circuit is 20°C.
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
Under-Voltage Lockout (UVLO)
The turn-on / turn-off thresholds of the SG6849 are
fixed internally at 17V/8V. To enable the SG6849 during
startup, the hold-up capacitor must first be charged to
17V through the startup resistor.
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Operation Description
The hold-up capacitor continues to supply VDD before
energy can be delivered from the auxiliary winding of
the main transformer. VDD must not drop below 8V
during this startup process. This UVLO hysteresis
window ensures that the hold-up capacitor can
adequately supply VDD during startup.
www.fairchildsemi.com
10
Noise from the current sense or the control signal may
cause significant pulse width jitter, particularly in
continuous-conduction mode. Slope compensation
helps alleviate this problem. Good placement and
layout practices should be followed. Avoid long PCB
traces and component leads. Compensation and filter
components should be located near the SG6849.
Increasing the power-MOS gate resistance is advised.
The SG6849 BiCMOS output stage is a fast totem-pole
gate driver. Cross-conduction is avoided to minimize
heat dissipation, increase efficiency, and enhance
reliability. The output driver is clamped by an internal
16.7V Zener diode to protect the power MOSFET
transistors against harmful over-voltage gate signals.
Slope Compensation
The sensed voltage across the current sense resistor is
used for current-mode control and pulse-by-pulse
current limiting. The built-in slope compensation
function improves power supply stability. Furthermore, it
prevents sub-harmonic oscillations that normally would
occur because of peak current mode control. A
positively sloped, synchronized ramp is activated by the
SG6849 with every switching cycle. The slope of the
ramp is:
0.36 × Duty
Duty(max.)
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
(1)
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Noise Immunity
Gate Output
www.fairchildsemi.com
11
F1
L1
1
1
L
CX1
2
BD1
2 -
+ 4
+
C1
R1
C2
C3
R3
R5
R4
D4
T1
10
2
1
1
L2
VO
2
R2
9
D1
R10
22
8
5
2
3
GATE
FB
VDD
NC
SENSE
6
C8
+
D5
5
7
4
GND
3,4
R6
R8
D2
1
2
CY1
+
C4
Figure 20. Reference Circuit (without Secondary-Side Feedback)
BOM
BD1
CX1 (Option)
CY1 (Option)
C1
C2
C3
C4
C7 (Option)
C8
C9
D1
D2
D4
D5 (Option)
Component
BD DI106 1A/600V
YC 472pF/400V (Y1)
YC 102pF/400V (Y1)
CC 0.01μF/500V
EC 10μF/400V 105ºC
CC 1000pF/500V
EC 10μF/50V
CC 102pF/100V 1206
EC 470μF/10V 105ºC
EC 220μF/10V 105ºC
Diode FRI07
Diode FR102
Diode SB360
ZD 6.8V/0.5W
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
C9
Q1
1
SG6849
Reference
+
2
GND
R7
3
1
U4
C7
1
3
1
N
1,2
Reference
F1
L1
L2
Q1
R1,R2
R3,R4
R5
R6
R7
R8
R10(Option)
T1
U4
Component
R 1Ω/0.5W
Inductor 20mH 6*8mm
Inductor 10μH 6mm
MOSFET 1A/600V
R 750kΩ/1206
R 47kΩ/1206
R 47Ω/1206
R 4.7Ω/0.5W
R 100Ω/0805
R 10Ω/1206
R 10Ω/1206
Transformer EE-16
IC SG6849 (Green PWM IC)
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Applications Information
www.fairchildsemi.com
12
L1
2
BD1
+
2 -
+ 4
R3
R5
R4
C2
R1
3
N
C3
+
C1
T1
D4
10
1,2
2
1
2
Vo
9
D1
R10
C7
8
5
22
+ C8
D5
+ C9
Q1
1
3
2
R7
L2
1
1
1
1
1
F1
L
7
GND
3,4
R6
1
2
3
C6
U1
SG6849
GND
GATE
FB
VDD
NC
SENSE
R2
6
R8
5
1
D2
2
4
+ C4
R11
U2
1
3
2
R13
R14
3
4
C10
U3
CY1
1
2
R12
Figure 21. Reference Circuit (with Secondary-Side Feedback)
BOM
Reference
BD1
CY1 (Option)
C1
C2
C3
C4
C6
C7
C8
C9
C10
D1
D2
D4
D5 (Option)
F1
L1
Component
BD DI106 1A/600V
YC 102p/400V
CC 0.01μF/500V
EC 10μF/400V 105ºC
CC 1000p/500V
EC 10μF50V
CC 472p/0805
CC 102p/100V 1206
EC 470μF10V 105ºC
EC 470μF10V 105ºC
CC 222p/0805
Diode FR107
Diode FR102
Diode SB360
ZD 6.8V/0.5W
R 1Ω/0.5W Resistor
Inductor 20mH 6*8mm
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1
Reference
L2
Q1
R1,R2
R4,R3
R5
R6
R7
R10
R8
R11
R12
R13
R14
T1
U1
U2
U3
Component
Inductor 10μH 6mm
MOSFET 1A/600V
R 750kΩ/1206
R 47kΩ/1206
R 47Ω/1206
R 4.7Ω/0.5W
R 100Ω/0805
R 10Ω/1206
R 10Ω/1206
R 100Ω/1/8W
R 33kΩ/0805
R 33kΩ/1/8W
R 4.7kΩ/0805
Transformer EE-16
IC SG6849 (Green PWM IC)
IC PC817
IC TL431
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Applications Information (Continued)
www.fairchildsemi.com
13
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Physical Dimensions
9.83
9.00
6.67
6.096
8.255
7.61
3.683
3.20
5.08 MAX
7.62
0.33 MIN
3.60
3.00
(0.56)
2.54
0.56
0.355
0.356
0.20
1.65
1.27
9.957
7.87
7.62
NOTES: UNLESS OTHERWISE SPECIFIED
A) THIS PACKAGE CONFORMS TO
JEDEC MS-001 VARIATION BA
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS ARE EXCLUSIVE OF BURRS,
MOLD FLASH, AND TIE BAR EXTRUSIONS.
D) DIMENSIONS AND TOLERANCES PER
ASME Y14.5M-1994
E) DRAWING FILENAME AND REVSION: MKT-N08FREV2.
Figure 22. 8-Pin Dual Inline (DIP) Package
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
SG6849 Rev. 1.6.1
www.fairchildsemi.com
14
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
Physical Dimensions (Continued)
Figure 23. 6-Pin SSOT-6 Package
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
SG6849 Rev. 1.6.1
www.fairchildsemi.com
15
SG6849 —Low-Power, Green-Mode PWM Flyback Power Controller without Secondary Feedback
16
www.fairchildsemi.com
© 2008 Fairchild Semiconductor Corporation
SG6849 Rev. 1.6.1