AP3902 power switch consists fixedfrequency current-mode controller hi
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Data Sheet POWER SWITCH OFF-LINE SMPS General Description
AP3902 power switch consists fixedfrequency current-mode controller high voltage transistor. specifically designed high performance off-line switching power supplies nonisolated small household applications. Compared discrete MOSFET controller power supply solutions, AP3902 solution offers advantages such fewer component numbers, smaller size, lower total cost. normal operation, AP3902 features with fixed switching frequency. When output power falls below given level, circuits automatically switches burst mode skipping some switching cycles. case failure modes like open loop, over voltage overload short circuit, device switches into auto restart mode which controlled internal protection unit. This adopts frequency dithering technique reduce EMI. AP3902 available DIP-8 package.
AP3902
Built-in Transistor with 700VCBO Current Mode Control with Skip Cycle Capability Operating Current: 0.45mA Fixed Switching Frequency: 60kHz Frequency Dithering Short Circuit Protection Open Short Circuit Protection OptoCoupler Maximal Input Power less than 0.2W under Load Output Power Range: Adapter with Outer Enclosure Open Frame Application
Applications
Induction Cooker Set-Top Boxes/DVB Adapters Auxiliary Power Supplies
DIP-8
Figure Package Type AP3902
Sep. 2008 Rev.
Semiconductor Manufacturing Limited
Data Sheet POWER SWITCH OFF-LINE SMPS Configuration
Package DIP-8)
AP3902
Figure Configuration AP3902 (Top View)
Description
Number Name Function This used short circuit protection, will pulled level when short circuit happens load terminal used line voltage compensation, uses this terminate output switch conduction power supply also used feedback control internally connected with base terminal internal transistor internally connected with collector terminal internal transistor connection Supply ground
Sep. 2008 Rev.
Semiconductor Manufacturing Limited
Data Sheet POWER SWITCH OFF-LINE SMPS Functional Block Diagram AP3902
Start-up Current Source Bias Transistor
UVLO
VREF (1.2
Emitter Comparator Logic Driver
VREF
Short Circuit Protection
Slope Compensation
VREF (1.2 Discharge Comparator Discharge Logic
Figure Functional Block Diagram AP3902
Sep. 2008 Rev.
Semiconductor Manufacturing Limited
Data Sheet POWER SWITCH OFF-LINE SMPS Ordering Information
AP3902 Circuit Type Package DIP-8 Lead Free Green Blank: Tube
AP3902
Package DIP-8
Temperature Range 85oC
Part Number Lead Free AP3902P-E1 Green AP3902P-G1
Marking Lead Free AP3902P-E1 Green AP3902P-G1
Packing Type Tube
Semiconductor's Pb-free products, designated with "E1" suffix part number, RoHS compliant. Products with "G1" suffix available green packages.
Absolute Maximum Ratings (Note
Parameter Collector Voltage Voltage Emitter Internal Transistor Supply Voltage Analog Input Voltage Continuous Collector Current Power Dissipation Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10s) (Human Body Model) Symbol VCES Value -0.3 -0.3 -0.3 -0.3 3000 Unit
Note Stresses greater than those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated under "Recommended Operating Conditions" implied. Exposure "Absolute Maximum Ratings" extended periods affect device reliability.
Sep. 2008 Rev.
Semiconductor Manufacturing Limited
Data Sheet POWER SWITCH OFF-LINE SMPS Electrical Characteristics
(VCC=4V, TJ=25oC, unless otherwise specified.)
Parameter Power Transistor Section Collector-Emitter Breakdown Voltage Collector-Emitter Saturation Voltage Current Gain UVLO Section Turn Threshold Voltage Turn Threshold Voltage Discharge Voltage Standby Current Section Start-up Current Operating Current Zener Voltage Dynamic Impedance Internal Oscillator Section Switching Frequency Frequency Dithering Temperature Stability Driver Output Section Turn Voltage Turn Voltage Rise Time Fall Time Maximum Duty Cycle Minimum Duty Cycle Driver On-Resistance Switch Current Effective Current Limit ILIM ROUT VOUT(on) VOUT(off) DMAX CL=1nF, pull-up CL=1nF, pull-up VCC(off) 0.2V VCC=VCC(on) 0.2V IOUT=0.7A Driver off, VOUT=10V VCC=VCC(off) 0.5V 85oC ICC(op) RVCC ICC=5mA 3.8Vto 4.8V 0.22 0.45 VCC(on) VCC(off) VDIS 5.00 3.37 5.25 3.55 5.50 3.73 VCES VCE, VBE=0, ICE=100A IC=0.5A, IB=0.1A IC=0.5A, VCE=2V Symbol Conditions Unit
AP3902
±3.5
Sep. 2008 Rev.
Semiconductor Manufacturing Limited
Data Sheet POWER SWITCH OFF-LINE SMPS Thermal Impedance
Parameter Junction Ambient Junction Case Symbol Value
AP3902
Unit
Typical Performance Characteristics
Operating Current
Start-up Current
Ambient Temperature
Ambient Temperature
Figure Start-up Current Ambient Temperature
Figure Operating Current Ambient Temperature
Switching Frequency (kHz)
Ambient Temperature
Figure Switching Frequency Ambient Temperature
Sep. 2008 Rev.
Semiconductor Manufacturing Limited
Data Sheet POWER SWITCH OFF-LINE SMPS Typical Application
D1-D4 12V/0.85A Zener
AP3902
85264V
AP3902
Figure 12V/0.85A Off-Line Adapter Application Circuit
Part Type Resistor, Resistor, Resistor, 1206 Resistor, 1206 Resistor, 1206 Resistor, 240, 0805 Resistor, 0805 Resistor, Resistor, 1206 Resistor, 200, 0805 Resistor, 12k, 0805 Resistor, 4.7k, 0805 Resistor, 3.1k, 0805 Diode, 1N4007, DO-41 Diode, 1N4148 Diode, FR107, DO-15 Diode, 3100, DO-201
Designator
Part Type Capacitor, 10F/400V Capacitor, 2200pF Capacitor, Capacitor, 22nF, 0805 Capacitor, 0.47F, 0805 Electrolytic Capacitor, 1000F Electrolytic Capacitor, 220F Capacitor, 2200pF Capacitor, 1nF, 0805 AP3902, DIP-8 AZ431, TO-92 Opto-Coupler, PC817, DIP-4 Inductor, 300H/0.3A Inductor, 10H/1A Transformer, EE-20 Zener, 13V/1W
Designator
Sep. 2008 Rev.
Semiconductor Manufacturing Limited
Data Sheet POWER SWITCH OFF-LINE SMPS Mechanical Dimensions DIP-8 Unit: mm(inch) AP3902
0.700(0.028) 7.620(0.300)TYP 1.524(0.060)
3.710(0.146) 4.310(0.170)
3.200(0.126) 3.600(0.142)
3.000(0.118) 3.600(0.142)
0.510(0.020)MIN
0.254(0.010)TYP 0.360(0.014) 0.560(0.022) 2.540(0.100) 0.130(0.005)MIN
0.204(0.008) 0.360(0.014) 8.200(0.323) 9.400(0.370)
R0.750(0.030) 3.000(0.118) Depth 0.100(0.004) 0.200(0.008) 9.000(0.354) 9.400(0.370)
6.200(0.244) 6.600(0.260)
Sep. 2008 Rev.
Semiconductor Manufacturing Limited
Semiconductor Manufacturing Limited
http://www.bcdsemi.com
IMPORTANT NOTICE Semiconductor Manufacturing Limited reserves right make changes without further notice products specifications herein. Semiconductor Manufacturing Limited does assume responsibility products particular purpose, does Semiconductor Manufacturing Limited assume liability arising application products circuits. Semiconductor Manufacturing Limited does convey license under patent rights other rights rights others.
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