November 2008
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1
SG6846 — Highly Integrated Green-Mode PWM Controller
SG6846
Highly Integrated Green-Mode PWM Controller
Features
Low Startup Current: 8µA
Low Operating Current: 3.7mA
Peak-Current Mode of Operation with Cycle-by-
Cycle Current Limiting
PWM Frequency Continuously Decreasing with
Burst Mode at Light Loads
VDD Over-Voltage Protection (OVP)
AC Input Brownout Protection with Hysteresis
Constant Output-Power Limit (Full AC Input Range)
Internal Latch Circuit for OVP, OTP, and OCP
Two-level Over-Current Protection (OCP) with
96ms Delay Time
Very Few External Components
Programmable Over-Temperature Protection (OTP)
Applications
General-purpose switch-mode power supplies and
flyback power converters, including:
Power Adapters
Open-Frame SMPS
SMPS with Surge-Current Output, such as for
Printers, Scanners, Motor Drivers
Description
The highly integrated SG6846 series of PWM
controllers provides several features to enhance the
performance of flyback converters. To minimize
standby-power consumption, a proprietary green-mode
function provides off-time modulation to continuously
decrease the switching frequency under light-load
conditions. Under zero-load conditions, the power
supply enters burst-mode. This completely shuts off
PWM output. The output restarts just before the supply
voltage drops below the under-voltage lockout (UVLO)
lower limit. This green-mode function enables power
supplies to meet international power conservation
requirements easily.
The SG6846 is designed especially for switch-mode
power supply (SMPS) with surge-current output. It is
incorporated with a two-level OCP function. Besides the
cycle-by-cycle current limiting, if the switching current is
higher than 2/3 of the peak-current threshold for a delay
time, OCP is activated such that the SG6846 is totally
shut down. Other protection functions include: AC-input
brownout protection with hysteresis and VDD OVP. For
OTP, an external NTC thermistor can be applied to
sense the ambient temperature. When OCP, VDD OVP,
or OTP are activated, an internal latch circuit is used to
latch off the controller. The latch resets when the VDD
supply is removed.
Other features of this controller include built-in
synchronized slope compensation and proprietary
internal compensation for constant output-power limit
over universal-AC-input range. Also, the gate output is
clamped at 18V to protect the external MOSFET from
over-voltage damage.
The SG6846 series controllers are available in both 8-
pin dual in-line (DIP) and small outline (SOP) packages.
Ordering Information
Part
Number
Operating Temperature
Range OTP Latch Eco Status Package Packing
Method
SG6846LSZ -20 to +85°C Yes RoHS 8-Pin SOP Tape & Reel
SG6846LSY -20 to +85°C Yes Green 8-Pin SOP Tape & Reel
SG6846LDZ -20 to +85°C Yes RoHS 8-Pin DIP Tube
SG6846LDY -20 to +85°C Yes Green 8-Pin DIP Tube
For Fairchild’s defini t i on of “green” Eco St atus, pleas e visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 2
SG6846 — Highly Integrated Green-Mode PWM Controller
Typical Application
Figure 1. Typical Application
Block Diagram
Figure 2. Block Diagram
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 3
SG6846 — Highly Integrated Green-Mode PWM Controller
Marking Information
SG6846FTP
XXXXXXXXYWWV
Marking for SG6846LSZ (Pb-free)
SG6846LDZ (Pb-free)
Figure 3. Top Mark 1
Marking for SG6846LSY (Green-compound)
SG6846LDY (Green-compound)
Figure 4. Top Mark 2
: Fairchild logo
Z: Plant Code
X: Year Code
Y: Week Code
TT: Die Run Code
F: L = OCP Latch
T: Package Type (D = DIP, S = SOP)
P: Y = Green Package
M: Manufacturing Flow Code
F: L = OTP Latch
T: D = DIP, S = SOP
P : Z = Lead Free + ROHS Compatible
Null = Regular Package
XXXXXXXX: Wafer Lot
Y: Year; WW: Week
V: Assembly Location
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 4
SG6846 — Highly Integrated Green-Mode PWM Controller
Pin Configuration
Figure 5. Pin Configuration
Pin Definitions
Pin # Name Function Description
1 GND Ground
Ground.
2 FB Feedback
The signal from the external compensation circuit is fed into this pin. The FB
pin and the current-sense signal from Pin 6 determine the PWM duty cycle.
3 VIN
Line-Voltage
Detection
Line-voltage detection. The line-voltage detection is used for brownout
protection with hysteresis. Constant-output-power limit over universal-AC-input
range is also achieved using the VIN signal. It is suggested to add low-pass
filter to filter out line ripple on bulk capacitor.
4 RI Reference
Setting
A resistor from the RI pin to ground generates a reference current source
inside SG6846. This determines the switching frequency. Increasing the
resistance reduces the switching frequency. Using a 26k resistor RI results in
a 65KHz switching frequency.
5 RT
Temperature
Detection
For OTP. An external negative temperature coefficient (NTC) thermistor is
connected from this pin to the GND pin. The impedance of the NTC decreases
at high temperatures. Once the voltage of the RT pin drops below a threshold,
PWM output is disabled.
6 SENSE Current Sense
Current sense. The sensed voltage is used for peak-current-mode control and
cycle-by-cycle current limiting. If the switching current is higher than 2/3 of the
peak-current threshold for longer than 96ms, OTP is activated. This two-level
OCP feature is especially suitable for SMPS with surge current output.
7 VDD Power Supply
Power Supply. The internal protection circuit disables PWM output in
response to VDD over voltage.
8 GATE Driver Output
The totem-pole output driver for the power MOSFET. A soft driving waveform is
implemented for improved electromagnetic interference (EMI).
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 5
SG6846 — Highly Integrated Green-Mode PWM Controller
Absolute Maximum Ratings
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. All voltage values, except differential voltages, are
given with respect to GND pin.
Symbol Parameter Min. Max. Unit
VDD Supply Voltage 25 V
VL Input Voltage to FB, SENSE, VIN, RT, RI Pins -0.3 7.0 V
SOP 400
PD Power Dissipation DIP 800
mW
SOP 41.2
RΘJC Thermal ResistanceJunction-to-Case) DIP 67.1
°C/W
TJ Operating Junction Temperature -40 +125 °C
TSTG Storage Temperature Range -65 +150 °C
TL Lead Temperature, Wave Soldering, 10 Second +260 °C
Human Body Model, JESD22-A114 2.0 kV
ESD Machine Model, JESD22-A115A 200 V
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol Parameter Min. Max. Unit
TA Operating Ambient Temperature -20 +85 °C
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 6
SG6846 — Highly Integrated Green-Mode PWM Controller
Electrical Characteristics
VDD = 15V and TA = 25°C unless otherwise noted.
Symbol Parameter Conditions Min. Typ. Max. Unit
VDD Section
VDD-OP Continuously Operating Voltage 20 V
VDD-ON Turn-On Threshold Voltage 15.5 16.5 17.5 V
VDD-OFF Turn-Off Voltage 9.5 10.5 11.5 V
VDD-TH-G Low-Threshold Voltage for VDD to Exit
Green-OFF Mode
VDD-OFF
+1.25V V
VDD-LH Threshold Voltage for Latch-Off Release 3 4 5 V
IDD-ST Startup Current VDD-ON – 0.16V 8 30 µA
IDD-OP Operating Supply Current GATE Open 3.7 5.0 mA
VDD-OVP V
DD Over-Voltage Protection (Latch Off) 22.6 23.6 24.6 V
tD-VDDOVP V
DD OVP Debounce Time RI = 26k 100 µs
IDD-H V
DD OVP Latch-Off Holding Current VDD = 5V, TA=27 oC 45 µA
VIN Section
VIN-OFF PWM Turn-Off Threshold Voltage 0.67 0.72 0.77 V
VIN-ON PWM Turn-On Threshold Voltage V
IN-OFF
+0.20
V
Feedback Input Section
AV Input-Voltage to Current-Sense Attenuation 1/4.2 V/V
ZFB Input Impedance 4.0 5.5 7.0 k
VFBO FB-Pin Open Voltage 6.2 V
Current Sense Section
ZSENSE Input Impedance 12 k
tPD Delay to Output 100 200 ns
tLEB Leading-Edge Blanking Time 360 ns
VSTH1V Threshold Voltage for Current Limit VIN = 1V, RI = 26k 0.78 0.83 0.88 V
VSTH3V Threshold Voltage for Current Limit VIN = 3V, RI = 26k 0.65 0.70 0.75 V
VSTH1V-2/3 OCP Threshold Voltage for Current Limit VIN = 1V, RI = 26k 0.56 0.61 0.66 V
VSTH3V-2/3 OCP Threshold Voltage for Current Limit VIN = 3V, RI = 26k 0.46 0.51 0.56 V
tD-OCP Delay Time for OTP RI = 26k 82 96 110 ms
Continued on following page…
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 7
SG6846 — Highly Integrated Green-Mode PWM Controller
Electrical Characteristics (Continued)
VDD = 15V and TA = 25°C unless otherwise noted.
Symbol Parameter Conditions Min. Typ. Max. Unit
Oscillator Section
fOSC Normal PWM Frequency RI = 26k 60 65 70 KHz
fOSC-G Green-Mode Minimum Frequency RI = 26k 18.0 22.5 25.0 KHz
VFB-N FB-Pin Threshold for the Beginning of Green
Mode 2.1 V
VFB-G Green-OFF-Mode Voltage at FB Pin 1.6 V
SG Slope for Green-Mode Modulation RI = 26k 85 Hz/mV
fDV Frequency Variation vs. VDD Deviation VDD = 11.5V to 20V 5 %
fDT Frequency Variation vs. Temperature
Deviation TA = -20 to 85°C 1.5 5.0 %
Continued on following page…
f
OSC
:65KHz
f
OSC -GREEN
:22.5KHz
VV
FB -NFB -G FB
V
F r equen cy
PW M
F r equen cy
f
OSC -OFF
:0Hz
Figure 6. PWM Frequency
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 8
SG6846 — Highly Integrated Green-Mode PWM Controller
Electrical Characteristics (Continued)
VDD = 15V and TA = 25°C unless otherwise noted.
Symbol Parameter Conditions Min. Typ. Max. Unit
PWM Output Section
DCYMAX Maximum Duty Cycle 80 85 90 %
VOL Output Voltage Low VDD = 15V,
IOUT = 50mA 1.5 V
VOH Output Voltage High VDD = 12V,
IOUT = 50mA 8 V
tr Rising Time VDD = 15V,
GATE = 1nF 350 ns
tf Falling Time VDD = 15V,
GATE = 1nF 50 ns
VCLAMP Gate Output Clamping Voltage VDD = 20V 18 V
OTP Section
IRT Output Current of RT Pin RI = 26k 64 70 76 µA
VRTTH Threshold Voltage for OTP 1.015 1.065 1.115 V
tDOTP-LATCH Over-Temperature Latch-Off Debounce RI = 26k 100 µs
VRT-RLS OTP Release Voltage
(for Non-Latch-Off Version)
VRTTH +
0.1 V
RI Section
RINOR RI Operating Range 15.5 36.0 k
RIMAX Maximum RI Value for Protection 216 k
RIMIN Minimum RI Value for Protection 6 k
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 9
SG6846 — Highly Integrated Green-Mode PWM Controller
Typical Performance Characteristics
15.5
16.0
16.5
17.0
17.5
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C))
V
TH -ON
(V)
9.5
9.7
9.9
10.1
10.3
10.5
10.7
10.9
11.1
11.3
11.5
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
V
TH -O FF
(V)
Figure 7. Startup Threshold vs. Temperature Figure 8. Minimum Operating Voltage
vs. Temperature
13.500
14.000
14.500
15.000
15.500
16.000
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
I
DD-ST
(µA)
0
4
8
12
16
20
5 7 9 1113151719
VDD (V)
I
DD-ST
(µA)
Figure 9. Startup Current vs. Temperature Figure 10. Startup Current vs. VDD Voltage
0.400
0.500
0.600
0.700
0.800
0.900
1.000
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C))
V
IN-OFF
(V)
0.400
0.500
0.600
0.700
0.800
0.900
1.000
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
V
IN-ON
(V)
Figure 11. PWM Turn-Off Threshold Voltage
vs. Temperature
Figure 12. PWM Turn-On Threshold Voltage
vs. Temperature
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 10
SG6846 — Highly Integrated Green-Mode PWM Controller
Typical Performance Characteristics (Continued)
64.600
64.700
64.800
64.900
65.000
65.100
65.200
65.300
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
f
OSC
(KHz)
0
20
40
60
1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3
V
FB
(V)
PWM Frequency (KHz)
Figure 13. PWM Frequency vs. Temperature Figure 14. PWM Frequency vs. FB Voltage (RI=26k)
0
0.2
0.4
0.6
0.8
1
11.522.53
V
IN
(V)
V
TH -P
(V)
0
0.2
0.4
0.6
0.8
1
11.522.53
V
IN
(V)
V
TH -O
(V)
Figure 15. Current-Limit Threshold vs. VIN Voltage Figure 16. 2/3 Current-Limit Threshold vs. VIN Voltage
70.000
71.000
72.000
73.000
74.000
75.000
76.000
77.000
78.000
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
I
RT
(µA)
1.015
1.035
1.055
1.075
1.095
1.115
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
V
OTP-OFF
(V)
Figure 17. Output Current of RT Pin (IRT)
vs. Temperature
Figure 18. OTP Threshold Voltage vs. Temperature
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 11
SG6846 — Highly Integrated Green-Mode PWM Controller
Operation Description
Startup Operation
The turn-on/turn-off thresholds are fixed internally at
16.5V/10.5V. To enable the SG6846 during startup, the
hold-up capacitor must first be charged to 16.5V
through the startup resistor.
The hold-up capacitor continues to supply VDD before
energy can be delivered from the auxiliary winding of
the main transformer. The VDD must not drop below
10.5V during this startup process. This UVLO hysteresis
window ensures that the hold-up capacitor can
adequately supply VDD during startup.
The typical startup current is only 8μA. This allows a
high resistance, low-wattage startup resistor to be used
to minimize power loss. A 1.5M/0.25W, startup
resistor and a 10µF/25V VDD hold-up capacitor is
sufficient for a universal input range.
The required operating current has been reduced to
3.7mA. This enables higher efficiency and reduces the
VDD hold-up capacitance requirement.
Green-Mode Operation
Power supplies using the SG6846 can easily meet even
the most restrictive international regulations regarding
standby power consumption. The proprietary green-mode
function provides off-time modulation to continuously
decrease the switching frequency under light-load
conditions. Maximum on time is limited to provide
protection against abnormal conditions. To further reduce
power consumption under zero-load condition, the PWM
oscillator is completely turned off and the power supply
enters burst-mode. After the PWM oscillator is turned off,
the IC’s supply voltage VDD drops gradually. Before the VDD
voltage drops below the UVLO threshold, the PWM
oscillator is turned on again. This green-mode function
dramatically reduces power consumption under light-load
and zero-load conditions.
Oscillator Operation
A resistor connected from the RI pin to GND generates
a reference-current source inside the SG6846. This
current is used to determine the PWM frequency.
Increasing the resistance decreases the amplitude of
the current source and reduces the PWM frequency.
Using a 26k resistor RI results in a corresponding
65KHz switching frequency. The relationship between
RI and the switching frequency is:
)(k
1690
(KHz)
Ω
=
I
PWM R
f (1)
If an open circuit or short circuit to ground occurs at the
RI pin, the internal protection circuit immediately shuts
down the controller.
Two-Level Over-Current Protection (OCP)
Cycle-by-cycle current limiting shuts down the PWM
immediately when the switching current is over the
peak-current threshold. Additionally, when the switching
current is higher than 2/3 of the peak-current threshold,
the internal counter starts counting up. When the
switching current is lower than 2/3 of the peak current
threshold, the internal counter counts down. When the
total accumulated counting time is more than about
96ms (RI = 26k), the controller is latched off.
The two-level OCP protection and up/down counter are
especially designed for SMPS with surge current output
such as those for printers, scanners, and motor drivers.
Constant-Output-Power Limit
For constant-output-power limit over universal input-
voltage range, the peak-current threshold is adjusted by
the voltage of the VIN pin. Since the VIN pin is connected
to the rectified AC-input line voltage through the resistive
divider, a higher line voltage generates a higher VIN
voltage. The threshold voltage decreases as the VIN
voltage increases, making the maximum output power at
high-line input voltage equal to that at low-line input.
Brownout Protection
Since the VIN pin is connected through a resistive divider
to the rectified AC input line voltage, it can also be used
for brownout protection. If the VIN voltage is less than
0.72V, the PWM output is shut off. If the VIN voltage is
over 0.92V, the PWM output is turned on again. The
hysteresis window for ON/OFF is around 0.2V.
VDD Over-Voltage Protection (OVP)
VDD OVP is built in to prevent damage. If VDD is over
23.6V, SG6846 is latched off.
Over-Temperature Protection (OTP)
An external NTC thermistor can be connected from the
RT pin to GND. The impedance of the NTC decreases
at high temperatures. When the voltage of the RT pin
drops below 1.05V, the SG6846 is turned off. For
protection-mode options, see Ordering Information.
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 12
SG6846 — Highly Integrated Green-Mode PWM Controller
Operation Description (Continued)
Noise Immunity
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 SG6846.
Figure 19. Current Sense R-C Filter
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 13
SG6846 — Highly Integrated Green-Mode PWM Controller
Reference Circuit
F1
21
+C2
R16
21
+C12
21
+C13
FB
P16V P32V
P16V
CX1 32V
RI
4
VIN
3
FB
2
GND
1
RT 5
SENSE 6
VDD 7
GATE 8
U1
12
34
LF2
21
+C3
21
+
C5
1 2
3 4
LF1
VZ1
t
RT1
R1 R2
R3
R4
R12 C4
21 D2
C6
21 D1
12
43
U2
R18
R15
R20
A K
R
U3 R21
R19
C9
1
3
2
D4
R7
R13
R14
1
23
Q1
L1
C7
2
1
3
4
BD1
5
1
7 9
11
13
3
610
TX1
R17
21
+C14
21
+C15
16V
C11
1
3
2
D5
L2
P32V
P16V
21 D3
1 2
L4
R8
R9
R5
21
+
C1
R6
R10
NTC1
CX2
P1
P2
FB
1 2
L3
21
+
C16
21
+
C17
CY1
CY2
P7
R11
FB
16V
32V
P32V
P16V
P32VP16V
P16V
Figure 20. Application Circuit for 32V / 16V Output
BOM
Part No. Value Part No. Value Part No. Value
R1, R2, R3, R4 470K +/-5% C4 103 P 630V D3 FR103 1.0A 200V
R8, R9 S1M +/-1% C10,C11 102 P 1KV BD1 DBL406G
R5 16K2 +/-1% C6,C7 102 P 50V D4 BYT28-300
R15 1K5 +/-5% C9 222 P 50V D5 BYV32-150
R13 10 +/-5% C14,C17 470µ 25V F1 250V4A QUICK
R18 4K7 +/-5% C15 220µ 25V L1,L2 1.8µH
R21 15K +/-1% C13,C16 220µ 50V L4 10µH
R7 27K +/-5% C2 150µ 400V U3 TL431 +/-1%
R6 330 +/-1% C1 4.7µ 50V U1 SG 6846
R19 102K +/-1% C3 10µ 50V U2 PC817
R14 022 +/-5% CX1 X1 0.47µ 275V Q1 7NB60
R16, R17 1W 20 +/-5% C8 Y2 222P 250V TX1 EI-33
R11 20K +/-5% C5 100µ 50V RT1 SCK053
R12 100K +/-5% CX2 X2 0.1µF 275V VZ1 14ψ 470V
R20 887K +/-1% D1 1N4148
R22 10K +/-1% D2 BYV95C
© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
SG6846 • Rev. 1.3.1 14
SG6846 — Highly Integrated Green-Mode PWM Controller
Physical Dimensions
5.08 MAX
0.33 MIN
2.54
7.62
0.56
0.355
1.65
1.27
3.683
3.20
3.60
3.00
6.67
6.096
9.83
9.00
7.62
9.957
7.87
0.356
0.20
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
8.255
7.61
E) DRAWING FILENAME AND REVSION: MKT-N08FREV2.
(0.56)
Figure 21. 8-Pin Dual In-Line Package (DIP)
Pack age drawings are provided as a service to customers consideri ng Fai rchild components . Drawings may c hange i n any manner
without notice. P l ease note the revi sion and/or date on t he drawing and contac t a Fairchild S emiconductor 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 www.fairchildsemi.com
SG6846 • Rev. 1.3.1 15
SG6846 — Highly Integrated Green-Mode PWM Controller
Physical Dimensions
SEE DETAIL A
NOTES: UNLESS OTHERWISE SPECIFIED
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
LAND PATTERN RECOMMENDATION
SEATING PLANE
0.10 C
C
GAGE PLANE
x 45°
DETAIL A
SCALE: 2:1
PIN ONE
INDICATOR
4
8
1
C
MBA0.25
B
5
A
5.60
0.65
1.75
1.27
6.20
5.80
3.81
4.00
3.80
5.00
4.80
(0.33)
1.27
0.51
0.33
0.25
0.10
1.75 MAX 0.25
0.19
0.36
0.50
0.25
R0.10
R0.10
0.90
0.406 (1.04)
OPTION A - BEVEL EDGE
OPTION B - NO BEVEL EDGE
Figure 22. 8-Pin Small Outline Package (SOP)
Pack age drawings are provided as a service to customers consideri ng Fai rchild components . Drawings may c hange i n any manner
without notice. P l ease note the revi sion and/or date on t he drawing and contac t a Fairchild S emiconductor represent ative to v er ify
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 www.fairchildsemi.com
SG6846 • Rev. 1.3.1 16
SG6846 — Highly Integrated Green-Mode PWM Controller