FAN6862TY [ONSEMI]

用于反激转换器的 6 引脚绿色模式 PWM 控制器,65KHz;
FAN6862TY
型号: FAN6862TY
厂家: ONSEMI    ONSEMI
描述:

用于反激转换器的 6 引脚绿色模式 PWM 控制器,65KHz

控制器 开关 光电二极管 转换器
文件: 总18页 (文件大小:1230K)
中文:  中文翻译
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FAN6862  
Highly Integrated Green-Mode PWM Controller  
Features  
Description  
.
.
.
Low Startup Current: 8µA  
A highly integrated PWM controller, FAN6862 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, which  
completely shuts off PWM output. Output restarts just  
before the supply voltage drops below the UVLO lower  
limit. This green-mode function enables power supplies  
to meet international power conservation requirements.  
Low Operating Current in Green Mode: 3mA  
Peak-Current Mode Operation with Cycle-by-Cycle  
Current Limiting  
.
PWM Frequency Continuously Decreasing with  
Burst Mode at Light Loads  
.
.
.
.
VDD Over-Voltage Protection (OVP)  
Constant Output Power Limit (Full AC Input Range)  
Internal Latch Circuit for OVP, OTP  
The FAN6862 is designed for SMPS and integrates a  
frequency-hopping function that helps reduce EMI  
emission of a power supply with minimum line filters.  
The built-in synchronized slope compensation is  
proprietary sawtooth compensation for constant output  
power limit over universal AC input range. The gate  
output is clamped at 18V to protect the external  
MOSFET from over-voltage damage.  
Fixed PWM Frequency (65KHz) with Frequency  
Hopping  
.
.
.
Feedback Open-Loop Protection with 56ms Delay  
Soft Start Time: 4ms  
400mA Driving Capability  
Other protection functions include VDD over-voltage  
protection and over-temperature protection. For over-  
temperature protection, an external NTC thermistor can  
be applied to sense the ambient temperature. When VDD  
OVP or OTP is activated, an internal latch circuit latches  
off the controller.  
Applications  
General-purpose switch-mode power supplies and  
flyback power converters, including:  
.
.
.
Power Adapters  
Open-Frame SMPS  
Part Number  
FAN6862TY  
FAN6862NY  
OVP  
Latch  
Latch  
OTP  
OLP  
SMPS with Surge-Current Output, such as for  
Printers, Scanners, and Motor Drivers  
Latch Auto Restart  
Latch Auto Restart  
Ordering Information  
Operating Temperature  
Part Number  
Package  
Packing Method  
Range  
FAN6862TY  
FAN6862NY  
-40 to +105°C  
-40 to +105°C  
6-Pin SSOT-6  
8-Pin Dual In-Line Package (DIP)  
Tape & Reel  
Tube  
© 2009 Fairchild Semiconductor Corporation  
www.fairchildsemi.com  
FAN6862 • Rev. 2, Feb-2020  
Typical Application  
Figure 1. Typical Application  
Block Diagram  
Figure 2. Block Diagram  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
2
Marking Information  
ABx:  
TT:  
ABD: FAN6862TY  
Wafer Lot Code  
: Year Code  
Week Code  
_ _ _:  
F – Fairchild Logo  
Z – Plant Code  
X – 1-Digit Year Code  
Y – 1-Digit Week Code  
TT – 2-Digit Die Run Code  
T – Package Type (N:DIP)  
P – Y: Green Package  
M – Manufacture Flow Code  
Figure 3. Top Mark  
Pin Configuration  
Figure 4. SSOT-6  
Figure 5. DIP-8  
Pin Definitions  
Pin #  
SSOT-6  
Pin # DIP8  
Name  
Description  
8
1
GND  
Ground.  
Feedback. The FB pin provides the output voltage regulation signal. It  
provides feedback to the internal PWM comparator, so that the PWM  
comparator can control the duty cycle. This pin also provide for OLP: if  
VFB is larger than the trigger level and delays for a long time, the  
controller stops and restarts.  
7
6
5
2
FB  
NC  
RT  
No Connect Pin  
Temperature Detection. An external NTC thermistor is connected from  
this pin to GND for over-temperature protection. The impedance of the  
NTC decreases at high temperatures. Once the voltage of the RT pin  
drops below a threshold,  
3
4
PWM output is disabled.  
Current Sense. This pin senses the voltage across a resistor. When the  
voltage reaches the internal threshold, PWM output is disabled. This  
activates over-current protection. This pin also provides current  
amplitude information for current-mode control.  
4
SENSE  
3
2
NC  
No Connect Pin  
Power Supply.  
5
6
VDD  
Driver Output. The totem-pole output driver for driving the power  
MOSFET.  
1
GATE  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
3
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  
VDD  
Parameter  
Min.  
Max.  
30  
Unit  
V
Supply Voltage  
VL  
Input Voltage to FB, SENSE, RT Pin  
-0.3  
7.0  
V
SSOT-6  
DIP-8  
300  
800  
115  
67  
PD  
Power Dissipation at TA<50°C  
mW  
SSOT-6  
DIP-8  
ΘJC  
Thermal Resistance (Junction-to-Case)  
°C/W  
TJ  
TSTG  
TL  
Operating Junction Temperature  
-40  
-55  
+150  
+150  
+260  
3.00  
1.25  
°C  
°C  
°C  
Storage Temperature Range  
Lead Temperature, Wave Soldering, 10 Seconds  
Human Body Model, JESD22-A114  
Charge Device Model, JESD22-C101  
ESD  
kV  
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  
-40  
+105  
°C  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
4
Electrical Characteristics  
VDD = 15V and TA = 25°C unless otherwise noted.  
Symbol  
Parameter  
Test Condition  
Min.  
Typ. Max. Unit  
VDD Section  
VDD-OP  
VDD-ON  
VDD-OFF  
VDD-LH  
Continuously Operating Voltage  
Turn-on Threshold Voltage  
Turn-off Voltage  
24  
17  
9.5  
5
V
V
15  
7.5  
3
16  
8.5  
4
V
Threshold voltage for Latch-Off release  
Startup Current  
V
IDD-ST  
VDD-ON–0.16V  
CL=1nF  
8
30  
4
μA  
mA  
mA  
V
IDD-OP  
Normal Operating Supply Current  
Green-Mode Operating Supply Current  
VDD Over-Voltage Protection  
VDD OVP Debounce Time  
Latch-Off Holding Current  
3
IDD-BM  
GATE open, VFB=VFB-G  
2.5  
26  
50  
65  
VDD-OVP  
tD-VDDOVP  
IDD-LH  
24  
25  
30  
40  
μs  
μA  
VDD=5V  
Feedback Input Section  
AV  
ZFB  
Input-Voltage to Current-Sense Attenuation  
1/4.0  
1/3.5 1/3.0  
5.5  
V/V  
kΩ  
V
Input Impedance  
VFB-OPEN  
FB Pin Open Voltage  
5.0  
4.3  
53  
5.2  
4.6  
56  
5.4  
4.9  
60  
Threshold Voltage for Open-Loop  
Protection  
VFB-OLP  
tD-OLP  
V
Open-Loop Protection Delay Time  
ms  
Current Sense Section  
tPD  
Delay to Output  
100  
360  
250  
ns  
ns  
V
tLEB  
Leading-Edge Blanking Time  
270  
0.47  
0.41  
VSTHFL  
VSTHVA  
VSLOPE  
Flat Threshold Voltage for Current Limit  
Valley Threshold Voltage for Current Limit  
Slope Compensation  
Duty>51%  
Duty=0%  
0.50  
0.44  
0.273  
4.00  
0.53  
0.47  
V
Duty=DCYMAX  
V
tSOFT-START Period During Startup time  
2.50  
5.25  
ms  
Oscillator Section  
Center  
Frequency  
VFB>VFB-N  
62  
65  
68  
fOSC  
Normal PWM Frequency  
kHz  
±3.7  
±4.2  
±4.7  
Hopping Range  
VFBVFB-N  
Hopping Range*1 VFB=VFB-G  
±2.9  
4.4  
thop-1  
thop-3  
Hopping Period 1*1  
Hopping Period 3*1  
VFBVFB-N  
ms  
ms  
VFB=VFB-G  
11.5  
22.5  
fOSC-G  
Green Mode Minimum Frequency  
18.0  
2.0  
25.0  
2.4  
kHz  
FB Threshold Voltage For Frequency  
Reduction  
VFB-N  
2.2  
V
VFB-G  
VFB-ZDC  
fDV  
FB Voltage at fOSC-G  
1.9  
2.1  
1.7  
2.3  
V
V
FB Threshold Voltage for Zero Duty  
Frequency Variation vs. VDD Deviation  
VDD=11.5V to 20V  
TA= -40 to +105°C  
0
0.02  
2.00  
2
%
Frequency Variation vs. Temperature  
Deviation  
fDT  
%
Continued on the following page…  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
5
Electrical Characteristics (Continued)  
VDD = 15V and TA = 25°C unless otherwise noted.  
Symbol  
Parameter  
Test Condition  
Min.  
Typ. Max.  
Unit  
PWM Output Section  
DCYMAX  
VOL  
Maximum Duty Cycle  
Output Voltage Low  
65  
6
70  
75  
%
V
VDD=15V, IO=50mA  
VDD=8V, IO=50mA  
CL=1nF  
1.5  
VOH  
Output Voltage High  
Rising Time  
V
tR  
150  
35  
200  
80  
ns  
ns  
V
tF  
Falling Time  
CL=1nF  
VCLAMP  
Gate Output Clamping Voltage  
VDD=20V  
15.0  
16.5  
18.0  
Over-Temperature Protection (OTP) Section  
IRT  
Output Current of RT Pin  
92  
0.95  
15  
100  
108  
1.05  
19  
μA  
Threshold Voltage for Over-Temperature  
Protection  
VOTP  
TA=25°C  
1.00  
V
VFB=VFB-N  
17  
51  
tDOTP  
Over-Temperature Debounce Time  
ms  
(1)  
VFB=VFB-G  
2nd Threshold Voltage for Over-Temperature  
Protection  
2nd Over-Temperature Debounce Time  
VOTP2  
TA=25°C  
0.60  
80  
0.70  
100  
0.75  
190  
V
tDOTP2  
Note:  
μs  
1. Guarantee by Design.  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
6
Typical Performance Characteristics  
17  
16.6  
16.2  
15.8  
15.4  
15  
9.5  
9.1  
8.7  
8.3  
7.9  
7.5  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
125  
125  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
Temperature (ºC)  
Temperature (ºC)  
Figure 6. Turn-on Threshold Voltage (VDD-ON  
)
Figure 7. Turn-off Threshold Voltage (VDD-OFF  
)
vs. Temperature  
vs. Temperature  
4.5  
4.1  
3.7  
3.3  
2.9  
2.5  
26  
25.6  
25.2  
24.8  
24.4  
24  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
Temperature (ºC)  
Temperature (ºC)  
Figure 8. Operating Current (IDD-OP  
vs. Temperature  
)
Figure 9. VDD Over-Voltage Protection (VDD-OVP  
vs. Temperature  
)
68  
67  
66  
65  
64  
63  
62  
2.2  
2.12  
2.04  
1.96  
1.88  
1.8  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
Temperature (ºC)  
Temperature (ºC)  
Figure 10. Center Frequency (fOSC) vs. Temperature  
Figure 11. FB Threshold Voltage for Frequency  
Reduction (VFB-N) vs. Temperature  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
7
Typical Performance Characteristics (Continued)  
2.2  
2.12  
2.04  
1.96  
1.88  
1.8  
4.9  
4.8  
4.7  
4.6  
4.5  
4.4  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
Temperature (ºC)  
Temperature (ºC)  
Figure 12. FB Voltage at fOSC-G (VFB-G  
vs. Temperature  
)
Figure 13. Threshold Voltage for Open-Loop  
Protection (VFB-OLP) vs. Temperature  
59  
58  
57  
56  
55  
54  
53  
0.6  
0.56  
0.52  
0.48  
0.44  
0.4  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
Temperature (ºC)  
Temperature (ºC)  
Figure 14. Open-Loop Protection Delay Time (tD-OLP  
vs. Temperature  
)
Figure 15. Flat Threshold Voltage for Current Limit  
(VSTHFL) vs. Temperature  
0.55  
0.51  
0.47  
0.43  
0.39  
0.35  
5
4
3
2
1
0
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
Temperature (ºC)  
Temperature (ºC)  
Figure 16. Valley Threshold Voltage for Current Limit  
(VSTHVA) vs. Temperature  
Figure 17. Period during Startup (tSOFT-START  
)
vs. Temperature  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
8
Typical Performance Characteristics (Continued)  
72  
71  
70  
69  
68  
67  
200  
180  
160  
140  
120  
100  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
Temperature (ºC)  
Temperature (ºC)  
Figure 18. Maximum Duty Cycle (DCYMAX  
vs. Temperature  
)
Figure 19. Rising Time (tR) vs. Temperature  
50  
40  
30  
20  
10  
0
120  
112  
104  
96  
88  
80  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
-40  
-30  
-15  
0
25  
50  
75  
85  
100  
125  
Temperature (ºC)  
Temperature (ºC)  
Figure 20. Falling Time (tF) vs. Temperature  
Figure 21. Output Current of RT Pin (IRT  
)
vs. Temperature  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
9
Operation Description  
Startup Operation  
Figure 22 shows a typical startup circuit and transformer  
auxiliary winding for a FAN6862 application. Before  
FAN6862 begins switching operation, it consumes only  
startup current (typically 8μA) and the current supplied  
through the startup resistor charges the VDD capacitor  
(CDD). When VDD reaches turn-on voltage of 16V (VDD-  
ON), FAN6862 begins switching and the current  
consumed increases to 3mA. Then, the power required  
is supplied from the transformer auxiliary winding. The  
large hysteresis of VDD (8.5V) provides more holdup  
time, which allows using a small capacitor for VDD. The  
startup resistor is typically connected to AC line for a  
fast reset of latch protection.  
Figure 23. PWM Frequency  
VDL  
+
Np  
Vo  
CDL  
-
VFB  
CDD  
NA  
AC line  
R START  
VFB.ZDC  
(1.7V)  
FAN6862  
6
5
4
GND  
1
2
GATE  
Ids  
FB  
RT  
VDD  
3
SENSE  
Switching  
Disabled  
Switching  
Disabled  
Figure 22. Startup Circuit  
Figure 24. Burst Mode Operation  
Frequency Hopping  
Green-Mode Operation  
EMI reduction is accomplished by frequency hopping,  
which spreads the energy over a wider frequency range  
than the bandwidth measured by the EMI test  
equipment. An internal frequency hopping circuit  
changes the switching frequency between 60.8kHz and  
69.2kHz with a period of 4.4ms, as shown in Figure 25.  
The FAN6862 uses feedback voltage (VFB) as an  
indicator of the output load and modulates the PWM  
frequency, as shown in Figure 23, such that the  
switching frequency decreases as load decreases. In  
heavy load conditions, the switching frequency is  
65KHz. Once VFB decreases below VFB-N (2.2V), the  
PWM frequency starts to linearly decrease from 65KHz  
to 22.5kHz to reduce the switching losses. As VFB  
decreases below VFB-G (2.1V), the switching frequency  
is fixed at 22.5kHz and FAN6862 enters “deep” green  
mode, where the operating current decreases to 2.5mA  
(maximum), further reducing the standby power  
consumption. As VFB decreases below VFB-ZDC (1.7V),  
FAN6862 enters burst-mode operation. When VFB drops  
below VFB-ZDC, FAN6862 stops switching and the output  
voltage starts to drop, which causes the feedback  
voltage to rise. Once VFB rises above VFB-ZDC, switching  
resumes. Burst mode alternately enables and disables  
switching, thereby reducing switching loss in standby  
mode, as shown in Figure 24.  
fs  
69.2kHz  
65.0kHz  
60.8kHz  
t
4.4ms  
Figure 25. Frequency Hopping  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
10  
Protections  
Self-protective functions include VDD Over-Voltage  
Protection (OVP), Open-Loop / Overload Protection  
(OLP), Over-Current Protection (OCP), Short-Circuit  
Protection, and Over-Temperature Protection (OTP).  
OLP, OCP, and SCP are auto-restart mode protections;  
while OVP and OTP are latch-mode protections.  
Open-Loop / Over-Load Protection (OLP)  
When the upper branch of the voltage divider for the  
shunt regulator (KA431 shown) is broken, as shown in  
Figure 27, no current flows through the opto-coupler  
transistor, which pulls up the feedback voltage to 5.2V.  
When the feedback voltage is above 4.6V longer than  
56ms, OLP is triggered. This protection is also triggered  
when the SMPS output drops below the nominal value  
longer than 56ms due to the overload condition.  
Auto-Restart Mode Protection: Once a fault condition  
is detected, switching is terminated and the MOSFET  
remains off. This causes VDD to fall because no more  
power is delivered from auxiliary winding. When VDD  
falls to VDD-OFF (8.5V), the protection is reset and the  
operating current reduces to startup current, which  
causes VDD to rise. FAN6862 resumes normal operation  
when VDD reaches VDD-ON (16V). In this manner, the  
auto-restart can alternately enable and disable the  
switching of the MOSFET until the fault condition is  
eliminated (see Figure 26).  
Latch-Mode Protection: Once this protection is  
triggered, switching is terminated and the MOSFET  
remains off. The latch is reset only when VDD is  
discharged below 4V by unplugging AC power line.  
VFB  
5.2V  
VFB-OLP (4.6V)  
OLP Triggers  
OLP Shutdown Delay Time  
Figure 27. OLP Operation  
VDD Over-Voltage Protection (OVP)  
VDD over-voltage protection prevents IC damage caused  
by over voltage on the VDD pin. The OVP is triggered  
when VDD reaches 25V. A debounce time (typically  
30µs) prevents false triggering by switching noise.  
Over-Temperature Protection (OTP)  
The OTP circuit is composed of current source and  
voltage comparators. Typically, an NTC thermistor is  
connected between the RT and GND pins. Once the  
voltage of this pin drops below a threshold of 1.0V,  
PWM output is disabled after tDOTP debounce time. If this  
pin drops below 0.7V, it triggers the latch-off protection  
immediately after tDOTP2 debounce time.  
Figure 26. Auto Restart Operation  
Over-Current Protection (OCP)  
FAN6862 has over-current protection thresholds. It is for  
pulse-by-pulse current limit, which turns off MOSFET for  
the remainder of the switching cycle when the sensing  
voltage of MOSFET drain current reaches the threshold.  
The other threshold is for the over-current protection,  
which shuts down the MOSFET gate when the sensing  
voltage of MOSFET drain current is above the threshold  
longer than the shutdown delay (56ms).  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
11  
Leading-Edge Blanking (LEB)  
Constant Output Power Limit  
Each time the power MOSFET is switched on, a turn-on  
spike occurs across the sense-resistor caused by  
primary-side capacitance and secondary-side rectifier  
reverse recovery. To avoid premature termination of the  
switching pulse, a leading-edge blanking time is built in.  
During this blanking period (360ns), the PWM  
comparator is disabled and cannot switch off the gate  
driver. Thus, RC filter with a small RC time constant is  
enough for current sensing.  
FAN6862 has saw-limiter for pulse-by-pulse current  
limit, which guarantees almost constant power limit over  
different line voltages of universal input range.  
The conventional pulse-by-pulse current limiting scheme  
has a constant threshold for current limit comparator,  
which results in a higher power limit for high line  
voltage. FAN6862 has a sawtooth current limit threshold  
that increases progressively within a switching cycle,  
which provides lower current limit for high line and  
makes the actual power limit level almost constant over  
different line voltages of universal input range, as shown  
in Figure 28.  
Figure 29. Current Sense R-C Filter  
Soft-Start  
The FAN6862 has an internal soft-start circuit that  
increases pulse-by-pulse current-limit comparator  
inverting input voltage slowly after it starts. The typical  
soft-start time is 4ms. The pulsewidth to the power  
MOSFET is progressively increased to establish the  
correct working conditions for transformers, rectifier  
diodes, and capacitors. The voltage on the output  
capacitors is progressively increased with the intention  
of smoothly establishing the required output voltage. It  
also helps prevent transformer saturation and reduces  
the stress on the secondary diode during startup.  
Figure 28. Sawtooth Current Limiter  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
12  
Applications Information  
NTC1  
SCK053  
F1  
3.15A  
C1  
R3  
L1  
R1  
C 102P/1206  
R 47R/1206  
BD1  
R 1.5M/1206  
2
1N5  
N4  
1
BD2A/600V  
M1  
MOV  
+1  
L3  
VO  
TR1  
L1  
900uH  
L2  
TRN-0211  
4
1
N1  
N2  
1
3
6
1
2
VO  
C2  
10uH  
2
C5  
R7  
R 100K/1206  
R 750K/1206  
飛ꢀ  
LED1  
C 472pF/1KV  
R4  
3
R2  
+
R 1.5M/1206  
+
D1  
+
C4  
N3 11  
C11  
N1  
D120A/100V  
C82uF/450V  
D2  
D 1N4007  
C6  
R10  
R 1K/1206  
R5  
SGN  
R 750K/1206  
-1  
C3  
YC470p/400V  
10  
7
RM8  
Q1  
飛ꢀ  
MOS 6A/600V  
D3  
D 1N4007  
1
R17  
R8  
R9  
R6  
R 0R22/1W R 0R/0805  
R 100/1206  
U1  
GND GATE  
GND  
FB  
1
2
6GATE  
D4  
5
4
VDD  
SENSE  
1
2
FB  
RT  
VDD  
D 1N4148  
RT 3  
C7  
C 102P/0805  
SENSE  
+
+
C12  
C9  
R11 FAN6862  
R 5.6K/0805  
C/4.7uF/50V  
C/10uF/50V  
C8  
C 471p/0805  
NTC2  
TTC 100K  
R13  
R 560/0805  
R12  
U3  
PC817  
R/100/1206  
R16  
R 39K/1206  
C10  
R14  
R 10K/0805  
C 0.1uF/0805  
U2  
TL431  
R
R15  
R 10K/0805  
Figure 30. 36W (12V/3A) Application Circuit  
BOM  
Designator  
BD1  
D1  
Part Type  
Designator  
C8  
Part Type  
2KBP06M 2A/600V  
CC 470pF/50V  
EC 10µF/50V  
CC 0.1µF/50V  
EC 4.7µF/50V  
Y2010DN 20A/100V  
1N4007  
C9  
D2, D3  
D4  
C10  
1N4148  
C12  
F1  
Fuse 3.15A/250V  
NTC Thermistor SCK053  
NTC Thermistor TTC 100KΩ  
900µH  
R1, R2  
R3  
R 1.5M(option)  
R 47Ω  
NTC1  
NTC2  
L1  
R4, R5  
R6, R12  
R7  
R 750K(option)  
R 100Ω  
L2  
10mH  
R 100KΩ  
R 0.22/ 1W  
R 0Ω  
L3  
10µH  
R8  
TR1  
M1  
RM-8 400µH  
VZ 9G  
R9  
R10  
R 1KΩ  
LED1  
C1  
LED  
R11  
R 5.6KΩ  
CC 1nF  
R13  
R 560Ω  
C2  
XC 0.33µF/275V  
YC 470pF/400V  
EC 82µF/400V  
CC 4.7nF/1KV  
EC 680µF/25V  
CC 1nF  
R14, R15  
R16  
R 10KΩ  
C3  
R 39KΩ  
C4  
U1  
IC FAN6862  
TL431  
C5  
U2  
C6, C11  
C7  
U3  
PC-817  
Q1  
MOSFET 6A/600V  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
13  
Physical Dimensions  
Figure 31. 6-Pin, SUPERSOT6 “SSOT-6”, JEDEC MO-193, 1.6mm Wide 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.  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
14  
Physical Dimensions  
0.400 10.160  
0.355 9.017  
[
]
8
5
PIN 1 INDICATOR  
0.280 7.112  
0.240 6.096  
[
]
1
4
HALF LEAD 4X  
0.005 [0.126]  
FULL LEAD 4X  
0.005 [0.126] MIN  
0.325 8.263  
0.300 7.628  
[
]
0.195 4.965  
MAX 0.210 [5.334]  
0.115  
[
2.933  
]
SEATING PLANE  
0.150 3.811  
0.115  
[
2.922  
]
C
MIN 0.015 [0.381]  
0.100 [2.540]  
0.300 [7.618]  
0.045 1.144  
0.030 0.763  
4X  
[
]
0.430 [10.922]  
MAX  
0.022 0.562  
0.014  
[
0.358  
]
0.070 1.778  
0.045 1.143  
4X  
[
]
0.10  
C
NOTES:  
A) THIS PACKAGE CONFORMS TO  
JEDEC MS-001 VARIATION BA  
B) CONTROLING DIMS ARE IN INCHES  
C) DIMENSIONS ARE EXCLUSIVE OF BURRS,  
MOLD FLASH, AND TIE BAR EXTRUSIONS.  
D) DIMENSIONS AND TOLERANCES PER ASME  
Y14.5M -1982  
E) DRAWING FILENAME AND REVSION: MKT-N08MREV1.  
Figure 32. 8-Pin Dual In-Line Package (DIP)  
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.  
© 2009 Fairchild Semiconductor Corporation  
FAN6862 • Rev. 2, Feb-2020  
www.fairchildsemi.com  
15  
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are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.  
ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent  
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