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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
March 2006
FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
Features
Internal Avalanche Rugged 700V Sense FET Consumes only 0.8W at 230 VAC & 0.5W load with Burst-Mode Operation Frequency Modulation for EMI Reduction Precision Fixed Operating Frequency, 100kHz Internal Start-up Circuit and Built-in Soft Start Pulse-by-Pulse Current Limiting and Auto-Restart Mode Over Voltage Protection (OVP), Over Load Protection (OLP), Internal Thermal Shutdown Function (TSD) Under Voltage Lockout (UVLO) Low Operating Current (3mA) Adjustable Peak Current Limit
Description
The FSDH0170RNB/FSDH0270RNB/FSDH0370RNB consists of an integrated current mode Pulse Width Modulator (PWM) and an avalanche rugged 700V Sense FET. It is specifically designed for high performance offline Switch Mode Power Supplies (SMPS) with minimal external components. The integrated PWM controller features include : a fixed oscillator with frequency modulation for reduced EMI, Under Voltage Lock Out (UVLO) protection, Leading Edge Blanking (LEB), an optimized gate turn-on/ turn-off driver, Thermal Shut Down (TSD) protection, and temperature compensated precision current sources for loop compensation and fault protection circuitry. Compared to a discrete MOSFET and controller or RCC switching converter solution, the FSDH0170RNB/ FSDH0270RNB/FSDH0370RNB reduces total component count, design size, and weight while increasing efficiency, productivity, and system reliability. These devices provide a basic platform that is well suited for the design of cost-effective flyback converters, as in PC auxiliary power supplies.
Applications
Auxiliary Power Supply for PC and Server SMPS for VCR, SVR, STB, DVD & DVCD Player SMPS for Printer, Facsimile & Scanner Adapter for Camcorder
Related Application Notes
AN-4137, AN-4141, AN-4147 (Flyback) AN-4134 (Forward)
Ordering Information
Product Number
FSDH0170RNB FSDH0270RNB FSDH0370RNB
Package
8DIP 8DIP 8DIP
Marking Code
DH0170R DH0270R DH0370R
BVDSS
700V 700V 700V
fOSC
100KHz 100KHz 100KHz
RDS(ON) (MAX.)
11 7.2 4.75
(c)2006 Fairchild Semiconductor Corporation
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
Typical Circuit
AC IN
DC OUT
Vstr Ipk PWM Vfb
Drain
Vcc
Source
Figure 1. Typical Flyback Application
Output Power Table(4)
230VAC 15%(3) Product
FSDH0170RNB FSDH0270RNB FSDH0370RNB
85-265VAC Adapter(1)
9W 11W 13W
Adapter(1)
14W 17W 20W
Open
Frame(2)
Open Frame(2)
13W 16W 19W
20W 24W 27W
Notes: 1. Typical continuous power in a non-ventilated enclosed adapter with sufficient drain pattern as a heat sinker, at 50C ambient. 2. Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sinker, at 50C ambient. 3. 230 VAC or 100/115 VAC with doubler. 4. The maximum output power can be limited by junction temperature.
Internal Block Diagram
Vcc 2 Vstr 5 D rain 6,7,8
IC H
8V/12V VBURL/VBURH
Vcc I DELA Y Vcc OSC I FB
Vcc good
Freq. M odulation
Vref
Internal Bias
Vfb 3
N orm al
PW M
Burst
S R
Q Q
2.5R Ipk 4 R
G ate driver LEB
V SD Vcc
S Q Q
1 GND
Vovp Vcc good TSD
R
Soft Start
Figure 2. Functional Block Diagram of FSDH0170RNB/FSDH0270RNB/FSDH0370RNB
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
Pin Configuration
8DIP
GND 1 Vcc 2 Vfb 3 Ipk 4
8 Drain 7 Drain 6 Drain 5 Vstr
Figure 3. Pin Configuration (Top View)
Pin Definitions
Pin Number
1 2
Pin Name
GND Vcc
Pin Function Description
Sense FET source terminal on primary side and internal control ground. Positive supply voltage input. Although connected to an auxiliary transformer winding, current is supplied from pin 5 (Vstr) via an internal switch during startup (see Internal Block Diagram Section). It is not until Vcc reaches the UVLO upper threshold (12V) that the internal start-up switch opens and device power is supplied via the auxiliary transformer winding. The feedback voltage pin is the non-inverting input to the PWM comparator. It has a 0.9mA current source connected internally while a capacitor and optocoupler are typically connected externally. A feedback voltage of 6V triggers overload protection (OLP). There is a time delay while charging external capacitor Cfb from 3V to 6V using an internal 5A current source. This time delay prevents false triggering under transient conditions but still allows the protection mechanism to operate under true overload conditions. This pin adjusts the peak current limit of the Sense FET. The 0.9mA feedback current source is diverted to the parallel combination of an internal 2.8k resistor and any external resistor to GND on this pin. This determines the peak current limit. If this pin is tied to Vcc or left floating, the typical peak current limit will be 0.8A (FSDH0170RNB), 0.9A (FSDH0270RNB), or 1.1A (FSDH0370RNB). This pin connects to the rectified AC line voltage source. At start-up the internal switch supplies internal bias and charges an external storage capacitor placed between the Vcc pin and ground. Once the Vcc reaches 12V, the internal switch is opened. The drain pins are designed to connect directly to the primary lead of the transformer and are capable of switching a maximum of 700V. Minimizing the length of the trace connecting these pins to the transformer will decrease leakage inductance.
3
Vfb
4
Ipk
5
Vstr
6, 7, 8
Drain
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
Absolute Maximum Ratings
(TA = 25C, unless otherwise specified)
Symbol
VDRAIN VSTR IDM Drain Pin Voltage Vstr Pin Voltage Drain Current Pulsed
5
Parameter
Value
700 700 FSDH0170RNB FSDH0270RNB FSDH0370RNB 4 8 12 50 140 230 20 -0.3 to VCC 1.5 Internally limited -25 to +85 -55 to +150
Unit
V V A A A mJ mJ mJ V V W C C C
EAS
Single Pulsed Avalanche Energy6
FSDH0170RNB FSDH0270RNB FSDH0370RNB
VCC VFB PD TJ TA TSTG
Supply Voltage Feedback Voltage Range Total Power Dissipation Operating Junction Temperature Operating Ambient Temperature Storage Temperature
Thermal Impedance
(TA = 25C, unless otherwise specified)
Symbol 8 DIP
JA JC JT
Parameter
Junction-to-Ambient Thermal7 Junction-to-Case Junction-to-Top Thermal8 Thermal9
Value
80 20 35
Unit
C/W C/W C/W
All items are tested with the standards JESD 51-2 and 51-10 (DIP). Notes: 5. Non-repetitive rating: Pulse width is limited by maximum junction temperature. 6. L = 51mH, starting Tj = 25C. 7. Free standing with no heatsink; Without copper clad. 8. Measured on the DRAIN pin close to plastic interface. 9. Measured on the PKG top surface.
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
Electrical Characteristics
(TA = 25C unless otherwise specified)
Symbol Sense FET Section
IDSS
11
Parameter
Zero-Gate-Voltage Drain Current
Condition
VDS = 700V, VGS = 0V VDS = 560V, VGS = 0V, TC = 125C
Min.
- - - - -
Typ.
- - 8.8 6.0 4.0 250 550 315 25 38 47 10 17 9 12 20 11.2 4 15 34 30 55 28.2 10 25 32 100 3 5 67 0 12 8 0.9 10
Max.
50 200 11 7.2 4.75 - - - - - - - - - - - - - - - - - - - - - 108 4 10 72 0 13 9 1.1 -
Unit
A
RDS(ON)
Drain-Source On-State Resistance10 Input Capacitance
FSDH0170RNB FSDH0270RNB FSDH0370RNB FSDH0170RNB FSDH0270RNB FSDH0370RNB
VGS = 10V, ID = 0.5A
CISS
VGS = 0V, VDS = 25V, f = 1MHz
- - - - - - - - -
pF
COSS
Output Capacitance
FSDH0170RNB FSDH0270RNB FSDH0370RNB
CRSS
Reverse Transfer Capacitance
FSDH0170RNB FSDH0270RNB FSDH0370RNB FSDH0170RNB FSDH0270RNB FSDH0370RNB VDS = 350V, ID = 1.0A
td(on)
Turn-On Delay Time
- - - - - - - - - - - - 92 2
ns
tr
Rise Time
FSDH0170RNB FSDH0270RNB FSDH0370RNB
td(off)
Turn-Off Delay Time
FSDH0170RNB FSDH0270RNB FSDH0370RNB
tf
Fall Time
FSDH0170RNB FSDH0270RNB FSDH0370RNB
Control Section
fOSC fMOD fOSC DMAX DMIN VSTART VSTOP IFB tS/S Feedback Source Current Internal Soft Start Time11 Switching Frequency Switching Frequency Modulation Switching Frequency Variation11 Maximum Duty Cycle Minimum Duty Cycle UVLO Threshold Voltage VFB = GND VFB = GND VFB = GND VFB = 4V -25C TA 85C Measured @0.1 x Vds KHz KHz % % % V mA ms
- 62 0 11 7 0.7 -
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
Electrical Characteristics (Continued)
(TA = 25C unless otherwise specified)
Symbol Burst Mode Section
VBURH VBURL VBUR(HYS)
Parameter
Burst Mode Voltage
Condition
Tj = 25C
Min.
0.5 0.3 100
Typ.
0.6 0.4 200 0.80 0.90 1.10 500 140 6.0 19 5.0 - 3 0.85 24
Max.
0.7 0.5 300 0.90 1.01 1.23 - - 6.5 - 6.5 - 5 1.0 -
Unit
V V mV A
Protection Section
ILIM Peak Current Limit FSDH0170RNB FSDH0270RNB FSDH0370RNB tCLD TSD VSD VOVP IDELAY tLEB IOP ICH VSTR Current Limit Delay Thermal Shutdown Time11 Temperature11 di/dt = 170mA/s di/dt = 200mA/s di/dt = 240mA/s 0.70 0.79 0.97 - 125 5.5 18 VFB = 4V 3.5 200 VCC = 14V VCC = 0V VCC = 0V 1 0.7 -
ns C V V A ns mA mA V
Shutdown Feedback Voltage Over Voltage Protection Shutdown Delay Current Leading Edge Blanking Time11
Total Device Section
Operating Supply Current (control part only) Start-Up Charging Current Vstr Supply Voltage
Notes: 10. Pulse test : Pulse width 300s, duty 2% 11. These parameters, although guaranteed, are not 100% tested in production.
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
Typical Performance Characteristics (Control Part)
(These characteristic graphs are normalized at TA = 25C)
1.20 1.00 Normalized 0.80 0.60 0.40 0.20 0.00 -50 0 50 Temp[C] 100 150 Normalized
1.20 1.00 0.80 0.60 0.40 0.20 0.00 -50 0 50 Temp[C] 100 150
Operating Frequency (fosc) vs. TA
Frequency Modulation (fMOD) vs. TA
1.20 Normalized 1.00
Normalized
1.20 1.00 0.80 0.60 0.40 0.20 0.00
0.80 0.60 0.40 0.20 0.00 -50 0 50 Temp[C] 100 150
-50
0
50 Temp[C]
100
150
Maximum Duty Cycle (DMAX) vs. TA
Operating Supply Current (IOP) vs. TA
1.20 1.00 0.80 0.60 0.40 0.20 0.00 -50 0 50 Temp[C] 100 150
Normalized
1.20 1.00 0.80 0.60 0.40 0.20 0.00 -50 0 50 Temp[C] 100 150
Nomalized
Start Threshold Voltage (VSTART) vs. TA
Stop Threshold Voltage (VSTOP) vs. TA
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
Typical Performance Characteristics (Continued)
1.20 1.00 Normalized 0.80 0.60 0.40 0.20 0.00 -50 0 50 Temp[C] 100 150 Normalized
1.20 1.00 0.80 0.60 0.40 0.20 0.00 -50 0 50 Temp[C] 100 150
Feedback Source Current (IFB) vs. TA
Start Up Charging Current (ICH) vs. TA
1.20 1.00 Normalized 0.80 0.60 0.40 0.20 0.00 -50 0 50 Temp[C] 100 150 Normalized
1.20 1.00 0.80 0.60 0.40 0.20 0.00 -50 0 50 Temp[C] 100 150
Peak Current Limit (ILIM) vs. TA
Over Voltage Protection (VOVP) vs. TA
FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Rev. 1.0.2
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
Functional Description
1. Startup: In previous generations of Fairchild Power Switches (FPSTM) the Vstr pin required an external resistor to the DC input voltage line. In this generation the startup resistor is replaced by an internal high voltage current source and a switch that shuts off 10ms after the supply voltage, Vcc, goes above 12V. The source turns back on if Vcc drops below 8V.
Vin,dc ISTR
3. Leading Edge Blanking (LEB): When the internal Sense FET is turned on; the primary side capacitance and secondary side rectifier diode reverse recovery typically cause a high current spike through the Sense FET. Excessive voltage across the Rsense resistor leads to incorrect feedback operation in the current mode PWM control. To counter this effect, the FPS employs a Leading Edge Blanking (LEB) circuit. This circuit inhibits the PWM comparator for a short time (tLEB) after the Sense FET is turned on. 4. Protection Circuits: The FPS has several protective functions such as Over Load Protection (OLP), Over Voltage Protection (OVP), Under Voltage Lock Out (UVLO), and Thermal Shut Down (TSD). Because these protection circuits are fully integrated inside the IC without external components, reliability is improved without increasing cost. Once a fault condition occurs, switching is terminated and the Sense FET remains off. This causes Vcc to fall. When Vcc reaches the UVLO stop voltage, VSTOP (typically 8V), the protection is reset and the internal high voltage current source charges the Vcc capacitor via the Vstr pin. When Vcc reaches the UVLO start voltage, VSTART (typically 12V), the FPS resumes its normal operation. In this manner, the autorestart can alternately enable and disable the switching of the power Sense FET until the fault condition is eliminated. 4.1 Over Load Protection (OLP): Overload is defined as the load current exceeding a pre-set level due to an unexpected event. In this situation, the protection circuit should be activated in order to protect the SMPS. However, even when the SMPS is operating normally, the Over Load Protection (OLP) circuit can be activated during the load transition. In order to avoid this undesired operation, the OLP circuit is designed to be activated after a specified time to determine whether it is a transient situation or an overload situation. In conjunction with the Ipk current limit pin (if used) the current mode feedback path would limit the current in the Sense FET when the maximum PWM duty cycle is attained. If the output consumes more than this maximum power, the output voltage (Vo) decreases below its nominal voltage. This reduces the current through the optocoupler LED, which also reduces the optocoupler transistor current, thus increasing the feedback voltage (VFB). If VFB exceeds 3V, the feedback input diode is blocked and the 5A current source (IDELAY) starts to slowly charge Cfb up to Vcc. In this condition, VFB increases until it reaches 6V, when the switching operation is terminated as shown in Figure 6. The shutdown delay time is the time required to charge Cfb from 3V to 6V with 5A current source.
Vstr Vcc
Vcc<8V UVLO on 10ms after Vcc 12V UVLO off
J-FET ICH
Figure 4. High Voltage Current Source
2. Feedback Control: The 700V FPS series employs current mode control, as shown in Figure 5. An optocoupler (such as the H11A817A) and shunt regulator (such as the KA431) are typically used to implement the feedback network. Comparing the feedback voltage with the voltage across the Rsense resistor of Sense FET plus an offset voltage makes it possible to control the switching duty cycle. When the KA431 reference pin voltage exceeds the internal reference voltage of 2.5V, the optocoupler LED current increases, the feedback voltage Vfb is pulled down and thereby reduces the duty cycle. This typically happens when the input voltage increases or the output load decreases.
Vcc 5uA Vcc 0.9mA
OSC
Vo
Vfb 3
CFB
+
D1
D2 2.5R VFB,in R Gate driver
VFB
-
431
VSD
OLP
Figure 5. Pulse Width Modulation (PWM) Circuit
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
VFB Over Load Protection 6V
5V
#6,7,8 D R AIN
#1
3V
GND
I LIM
R sense
t12= CFBx(V(t2)-V(t1)) / IDELAY t1 t2 t
t12 = C FB
V (t2 ) - V (t1 ) ; I DELAY
Figure 7. Soft Start Function
6. Burst Operation: In order to minimize power dissipation in standby mode, the FPS enters burst mode operation. Feedback voltage decreases as the load decreases and as shown in Figure 8, the device automatically enters burst mode when the feedback voltage drops below VBURH (typically 600mV). Switching still continues until the feedback voltage drops below VBURL (typically 400mV). At this point switching stops and the output voltage start to drop at a rate dependent on the standby current load. This causes the feedback voltage to rise. Once it passes VBURH, switching resumes. The feedback voltage then falls and the process is repeated. Burst mode operation alternately enables and disables switching of the Sense FET and reduces switching loss in standby mode.
I DELAY = 5 A, V (t1 ) = 3V , V (t 2 ) = 6V
Figure 6. Over Load Protection (OLP)
4.2 Thermal Shutdown (TSD): The Sense FET and the control IC are integrated, making it easier for the control IC to detect the temperature of the Sense FET. When the temperature exceeds approximately 140C, thermal shutdown is activated. 4.3 Over Voltage Protection (OVP): In the event of a malfunction in the secondary side feedback circuit, or an open feedback loop caused by a soldering defect, the current through the optocoupler transistor becomes almost zero (refer to Figure 5). Then, VFB climbs up in a similar manner to the overload situation, forcing the preset maximum current to be supplied to the SMPS until the overload protection is activated. Because excess energy is provided to the output, the output voltage may exceed the rated voltage before the overload protection is activated, resulting in the breakdown of the devices in the secondary side. In order to prevent this situation, an Over Voltage Protection (OVP) circuit is employed. In general, VCC is proportional to the output voltage and the FPS uses VCC instead of directly monitoring the output voltage. If VCC exceeds 19V, OVP circuit is activated resulting in termination of the switching operation. In order to avoid undesired activation of OVP during normal operation, Vcc should be designed to be below 19V. 5. Soft Start: The FPS has an internal soft start circuit that slowly increases the Sense FET current after startup as shown in Figure 7. The typical soft start time is 10ms, where progressive increments of the Sense FET current are allowed during the start-up phase. The pulse width to the power switching device is progressively increased to establish the correct working conditions for transformers, inductors, and capacitors. The voltage on the output capacitors is progressively increased with the intention of smoothly establishing the required output voltage. This also helps to prevent transformer saturation and reduce the stress on the secondary diode during startup.
Burst Operation VFB
Burst Operation Normal Operation
VBURH VBURL Current Waveform Switching OFF Switching OFF
Figure 8. Burst Operation Function
7. Frequency Modulation: Modulating the switching frequency of a switched power supply can reduce EMI. Frequency modulation can reduce EMI by spreading the energy over a wider frequency range than the bandwidth measured by the EMI test equipment. The amount of EMI reduction is directly related to the depth of the reference frequency. As can be seen in Figure 9, the frequency changes from 97KHz to 103KHz in 4ms for the 700V FPS series. Frequency modulation allows the use of a cost effective inductor instead of an AC input mode choke to satisfy the requirements of world wide EMI limits.
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Drain Current
Vcc Vcc
ts fs=1/ts
103kHz 100kHz 97kHz
5uA Vfb 3
IDELAY IFB
900uA 2k
PWM Comparator
0.8k Ipk 4
4ms
t
Rx
SenseFET Current Sense
Figure 9. Frequency Modulation Waveform
8. Adjusting Peak Current Limit: As shown in Figure 10, a combined 2.8k internal resistance is connected to the non-inverting lead on the PWM comparator. An external resistance of Rx on the current limit pin forms a parallel resistance with the 2.8k when the internal diodes are biased by the main current source of 900A.
Figure 10. Peak Current Limit Adjustment
For example, FSDH0270RNB has a typical Sense FET peak current limit (ILIM) of 0.9A. ILIM can be adjusted to 0.6A by inserting Rx between the Ipk pin and the ground. The value of the Rx can be estimated by the following equations: 0.9A : 0.6A = 2.8k : Xk, X = Rx || 2.8k. (X represents the resistance of the parallel network)
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Application Tips
1. Methods of Reducing Audible Noise
Switching mode power converters have electronic and magnetic components, which generate audible noises when the operating frequency is in the range of 20~20,000Hz. Even though they operate above 20KHz, they can make noise depending on the load condition. Here are three methods to reduce noise: Glue or Varnish The most common method involves using glue or varnish to tighten magnetic components. The motion of core, bobbin, and coil and the chattering or magnetostriction of core can cause the transformer to produce audible noise. The use of rigid glue and varnish helps reduce the transformer noise. Glue or varnish can also can crack the core because sudden changes in the ambient temperature cause the core and the glue to expand or shrink in a different ratio according to the temperature. Ceramic Capacitor Using a film capacitor instead of a ceramic capacitor as a snubber capacitor is another noise reduction solution. Some dielectric materials show a piezoelectric effect depending on the electric field intensity. Hence, a snubber capacitor becomes one of the most significant sources of audible noise. Another consideration is to use a zener clamp circuit instead of an RCD snubber for higher efficiency as well as lower audible noise. Adjusting Sound Frequency Moving the fundamental frequency of noise out of 2~4KHz range is the third method. Generally, humans are more sensitive to noise in the range of 2~4KHz. When the fundamental frequency of noise is located in this range, the noise sounds louder although the noise intensity level is identical. Refer to Figure 11. When FPS acts in Burst mode and the Burst operation is suspected to be a source of noise, this method may be helpful. If the frequency of Burst mode operation lies in the range of 2~4KHz, adjusting the feedback loop can shift the Burst operation frequency. In order to reduce the Burst operation frequency, increase a feedback gain capacitor (CF), optocoupler supply resistor (RD) and feedback capacitor (CB) and decrease a feedback gain resistor (RF) as shown in Figure 12.
Figure 11. Equal Loudness Curves
Figure 12. Typical Feedback Network of FPS 2. Other Reference Materials
AN-4134: Design Guidelines for Off-line Forward Converters Using Fairchild Power Switch (FPSTM) AN-4137:Design Guidelines for Off-line Flyback Converters Using Fairchild Power Switch (FPS) AN-4140: Transformer Design Consideration for Off-line Flyback Converters using Fairchild Power Switch (FPSTM) AN-4141: Troubleshooting and Design Tips for Fairchild Power Switch (FPSTM) Flyback Applications AN-4147: Design Guidelines for RCD Snubber of Flyback AN-4148: Audible Noise Reduction Techniques for FPS Applications
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
Typical Application Circuit
Application
PC Auxiliary Power Supply (Using FSDH0270RNB)
Output power
15W
Input voltage
Universal input (85-265 Vac)
Output Voltage (Max current)
5V (3A)
Features
High efficiency (> 78% at 115 Vac and 230 Vac input) Low standby mode power consumption (< 0.8W at 230 Vac input and 0.5W load) Enhanced system reliability through various protection functions Low EMI through frequency modulation Internal soft-start (10ms) Line UVLO function can be achieved using external component
Key Design Notes
The delay time for overload protection is designed to be about 30ms with C8 of 47nF. If faster/slower triggering of OLP is required, C8 can be changed to a smaller/larger value (e.g. 100nF for about 60ms). ZP1, DL1, RL1, RL2, RL3, RL4, RL5, RL7, QL1, QL2, and CL9 build a Line Under Voltage Lock Out block (UVLO). The zener voltage of ZP1 determines the input voltage which makes FPS turn on. RL5 and DL1 provide a reference voltage from VCC. If the input voltage divided by RL1, RL2, and RL4 is lower than the zener voltage of DL1, QL1 and QL2 turn on and pull down Vfb to ground. This evaluation board and corresponding test report can be provided.
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
C1
2.2nF AC250V
RS1
9
CS1
1.5nF
L1 L1 R2 D2 1N4007 CON1 1 2 3 C2 22uF 400V D4 R8 1N4007 L3 0 J1 1N4007 FB open D5 DS1 1N4007 1N4007 C3 22uF 400V Input ZP1 1N4762 R6 2.4 1W R14 30 1N4007 D3 C10 1nF 250V 4.7k ZDS1 P6KE180A
330uH 330uH
T1 T1 1
EE2229 EE2229 6
D1 D1
SB540 SB540
L2 L2
1uH 1uH
CON2
1
3
10
R3 560 560
R4 500 500 J4 0
J5 open
2
Output
1
U1A C4 1000uF 16V C9 1000uF 16V H11A817
R5 1.2k 1%
C5
470uF 10V
2
C6
47nF
R9
10k
D6 RL1 1Mega
1N4007
R10
2 4
U2 TL431A 1
RL5
30k
Drain
Drain
Drain
FSDH0x70RNB
RL2 1Mega
5
1
2
3
4
QL1 DL1 1N5233B KSP2907A
J3 open open
ZR1 open open C7 47uF 25V R12 R12 open
RL3 RL4 120k 1k J2 0
QL2 KSP2222A CL9 10uF 50V RL7 40k
U1B H11A817
ZD2 open
C8 47nF
R13 open
ZD1 open
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Rev. 1.0.2
8 7 6 GND Vcc Vfb
R11 1.2k 1%
1. Schematic
3
4
U3
Ipk
Vstr
5
2
14
3
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
2. Transformer Schematic Diagram
Top
2mm
EE2229 1 9, 10
10 9
2T 1T
2T
2T
Tape 1T(25um) 1T
5
N p/2 N p/2
2
3
6, 7
N 5V
7 6
Na
4
5
3mm
Bottom
Pin
1
2
4
23
3. Winding Specification Pin (S F)
Np/2 Na N5V Np/2 32 45 6, 7 9, 10 21 Insulation: Polyester Tape t = 0.025mm, 1 Layers 0.25 x 2 0.65 x 2 0.3 x 1 22 8 72 Solenoid winding Solenoid winding Solenoid winding Insulation: Polyester Tape t = 0.025mm, 2 Layers Insulation: Polyester Tape t = 0.025mm, 2 Layers Insulation: Polyester Tape t = 0.025mm, 2 Layers
Wire
0.3 x 1
Turns
72
Winding Method
Solenoid winding
4. Electrical Characteristics Pin
Inductance Leakage 1-3 1-3
Spec.
1.20mH 5% < 30H Max
Remark
100kHz, 1V Short all other pins
5. Core & Bobbin
Core: EE2229 (Material: PL-7, Ae = 35.7 mm2 ) Bobbin: 10 pin
FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Rev. 1.0.2
15
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
6. Demo Circuit Part List Part Number
C6, C8 C1 C10 CS1 C2, C3 C4, C9 C5 C7 CL9 L1 L2 R6 J1 J2, J4, L3 R2 R3 R4 R5, R11 R9 R10 R14 RL3 RL1, RL2 RL4 RL5 RL7 RS1 U1 U2 U3 QL1 QL2 D2, D3, D4, D5, D6, DS1 D1 DL1 ZP1 ZDS1 T1
Value
47nF 2.2nF (250V) 1nF (250V) 1.5nF (50V) 22F (400V) 1000F (16V) 470F (10V) 47F (25V) 10F (50V) 330H 1H 2.4 (1W) FB 0 4.7k 560 500 1.2k(1%) 10k 2 30 1k 1 Mega 120k 30k 40k 9 H11A817 TL431A FSDH0x70RNB KSP2907A KSP2222A 1N4007 SB540 1N5233B 1N4762 P6KE180A EE2229
Quantity
2 1 1 1 2 2 1 1 1 1 1 1 1 3 1 1 1 2 1 1 1 1 2 1 1 1 1 1 1 1 1 1 6 1 1 1 1 1
Description (Manufacturer)
Ceramic Capacitor AC Ceramic Capacitor Film Capacitor SMD Ceramic Capacitor Low Impedance Electrolytic Capacitor KMX series (Samyoung Elec.) Low ESR Electrolytic Capacitor NXC series (Samyoung Elec.) Low ESR Electrolytic Capacitor NXC series (Samyoung Elec.) General Electrolytic Capacitor General Electrolytic Capacitor Inductor Inductor Fusible Resistor Ferrite Beads Jumper Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Optocoupler (Fairchild Semiconductor) Shunt Regulator (Fairchild Semiconductor) FPSTM (Fairchild Semiconductor) PNP Transistor (Fairchild Semiconductor) NPN Transistor (Fairchild Semiconductor) Diode (Fairchild Semiconductor) Schottky Diode (Fairchild Semiconductor) Zener Diode (Fairchild Semiconductor) Zener Diode TVS (Fairchild Semiconductor) PL-7 Core (Samwha Elec.)
FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Rev. 1.0.2
16
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
7. Layout
7.1 Top image of PCB
7.2 Bottom image of PCB
FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Rev. 1.0.2
17
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
Package Dimensions
8-Pin DIP Dimemsions in millimeters
FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Rev. 1.0.2
18
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FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Green Mode Fairchild Power Switch (FPSTM)
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks.
ACExTM FAST(R) ActiveArrayTM FASTrTM BottomlessTM FPSTM Build it NowTM FRFETTM CoolFETTM GlobalOptoisolatorTM CROSSVOLTTM GTOTM DOMETM HiSeCTM EcoSPARKTM I2CTM E2CMOSTM i-LoTM EnSignaTM ImpliedDisconnectTM FACTTM IntelliMAXTM FACT Quiet SeriesTM Across the board. Around the world.TM The Power Franchise(R) Programmable Active DroopTM
DISCLAIMER
ISOPLANARTM LittleFETTM MICROCOUPLERTM MicroFETTM MicroPakTM MICROWIRETM MSXTM MSXProTM OCXTM OCXProTM OPTOLOGIC(R) OPTOPLANARTM PACMANTM POPTM Power247TM PowerEdgeTM
PowerSaverTM PowerTrench(R) QFET(R) QSTM QT OptoelectronicsTM Quiet SeriesTM RapidConfigureTM RapidConnectTM SerDesTM ScalarPumpTM SILENT SWITCHER(R) SMART STARTTM SPMTM StealthTM SuperFETTM SuperSOTTM-3
SuperSOTTM-6 SuperSOTTM-8 SyncFETTM TCMTM TinyLogic(R) TINYOPTOTM TruTranslationTM UHCTM UltraFET(R) UniFETTM VCXTM WireTM
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 FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component is any component of a life 1. Life support devices or systems are devices or support device or system whose failure to perform can systems which, (a) are intended for surgical implant into be reasonably expected to cause the failure of the life the body, or (b) support or sustain life, or (c) whose support device or system, or to affect its safety or failure to perform when properly used in accordance with instructions for use provided in the labeling, can be effectiveness. reasonably expected to result in significant injury to the user. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design First Production Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only.
Rev. I18
Preliminary
No Identification Needed
Full Production
Obsolete
Not In Production
FSDH0170RNB/FSDH0270RNB/FSDH0370RNB Rev. 1.0.2
19
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