Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 General Description Features The AP4340 is an output voltage detector for Primary Side Control System. It detects the output voltage and provides a periodical signal when the output voltage is lower than a certain threshold. The periodical signal can be coupled by the transformer to the primary side and provided as an awakening signal for the main primary side controller. By fast response to secondary side voltage, the AP4340 can effectively improve the transient performance of Primary Side Control System. • • • The AP4340 is available in TO-92 and SOT-23 packages. · TO-92 (Bulk Packing) Fast Detector of Supply Voltages 37kHz Output Pulse No External Components Applications · Adapters/Chargers for Cell/Cordless Phones, ADSL Modems, MP3 and Other Portable Apparatus Standby and Auxiliary Power Supplies TO-92 (Ammo Packing) SOT-23 Figure 1. Package Types of AP4340 Aug. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 1 Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 Pin Configuration Z Package （TO-92 Bulk Packing） Z Package （TO-92 Ammo Packing） 3 OUT 2 GND 2 GND 1 1 VCC 3 OUT VCC N Package （SOT-23） 3 1 2 Figure 2. Pin Configuration of AP4340 (Top View) Pin Description Pin Number Pin Name TO-92 SOT-23 1 1 VCC 3 2 OUT 2 3 GND Aug. 2011 Function This pin is the positive supply voltage input. VCC signal is also used to detect the secondary output voltage This pin supplies the pulse output current when VCC is lower than the internal trigger voltage This pin is the control ground Rev. 1. 1 BCD Semiconductor Manufacturing Limited 2 Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 Functional Block Diagram VCC 3 (2) 1 (1) OUT VDD Driver Power Regulator Dynamic - Logic Out Comp VREF + OSC + VREF UVLO VDD Band-Gap VREF - UVLO 2 (3) GND A (B) A for TO-92 B for SOT-23 Figure 3. Functional Block Diagram of AP4340 Ordering Information AP4340 G1: Green Circuit Type Blank: Bulk TR: Tape & Reel or Ammo Package Z: TO-92 N: SOT-23 Package Temperature Range Part Number Marking ID Packing Type AP4340Z-G1 4340Z-G1 Bulk AP4340ZTR-G1 4340Z-G1 Ammo AP4340NTR-G1 GT2 TO-92 -40 to 85°C SOT-23 Tape & Reel BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. Aug. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 3 Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 Absolute Maximum Ratings (Note 1) Parameter Value Unit Supply Voltage VCC -0.3 to 9 V Voltage at OUT -47 to 9 V -0.6 to 47 V Internally limited A VCC to VOUT Output Current at OUT Power Dissipation at TA=25ºC SOT-23 0.2 TO-92 0.5 Operating Junction Temperature Storage Temperature 150 ºC -65 to 150 ºC 300 ºC Lead Temperature (Soldering, 10 sec) Thermal Resistance Junction-to-Case W SOT-23 137 TO-92 83 ºC/W Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Min Max Unit Supply Voltage VCC 0 6 V Ambient Temperature TA -40 85 ºC Aug. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 4 Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 Electrical Characteristics VCC=5V, TA=25℃, unless otherwise specified. Parameter Conditions Min Typ Max Unit 4.1 4.4 4.8 V 50 200 245 µA 50 240 285 µA Power-off Voltage 3.45 3.8 4.15 V Internal Trigger Voltage 4.83 4.9 5 V Supply Voltage ( VCC Pin ) Power-on Voltage (VON) Startup Current Operating Current VCC=VON-0.2V OUT pin floating VCC=5V Output Section/ Oscillator Section Duty Cycle VCC=4.5V 1.5 5 6.5 % Normal Frequency VCC=4.5V OUT pin connect 100Ω to GND 25 38 50 kHz 15 23 30 mA Output Maximum Current Note 2: The system output voltage is 5V. Aug. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 5 Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 Typical Performance Characteristics 270 4.40 260 4.39 Operating Current (µA) Power-on Voltage (V) 250 4.38 4.37 4.36 4.35 4.34 4.33 4.32 -40 240 230 220 210 200 190 180 -20 0 20 40 60 80 100 170 -40 120 -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) o Ambient Temperature ( C) Figure 5. Operating Current vs. Ambient Temperature 4.10 4.88 4.05 4.87 4.00 4.86 Internal Trigger Voltage (V) Power-off Voltage (V) Figure 4. Power-on Voltage vs. Ambient Temperature 3.95 3.90 3.85 3.80 3.75 3.70 3.65 3.60 -40 4.84 4.83 4.82 4.81 4.80 4.79 -20 0 20 40 60 80 100 4.78 -40 120 o -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) Ambient Temperature ( C) Figure 6. Power-off Voltage vs. Ambient Temperature Aug. 2011 4.85 Figure 7. Internal Trigger Voltage vs. Ambient Temperature Rev. 1. 1 BCD Semiconductor Manufacturing Limited 6 Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 Typical Performance Characteristics (Continued) 45.0 5.50 Oscillation Frequency (kHz) 42.5 Duty Cycle (%) 5.25 5.00 4.75 40.0 37.5 35.0 32.5 30.0 -40 4.50 -40 -20 0 20 40 60 80 100 120 -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) o Ambient Temperature ( C) Figure 8. Duty Cycle vs. Ambient Temperature Figure 9. Oscillation Frequency vs. Ambient Temperature 38 36 Output Current (mA) 34 32 30 28 26 24 22 20 18 -40 -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) Figure 10. Output Current vs. Ambient Temperature Aug. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 7 Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 Operation Description Figure 11. Typical Waveforms of AP4340 When VCC voltage is beyond 4.4V, the AP4340 starts up. When the VCC voltage falls below the internal trigger voltage (4.9V), the OUT pin asserts a periodical pulse with frequency of 37kHz. The pulse signal will stop when VCC voltage increases up to the trigger voltage. When the VCC voltage is below 3.8V, the AP4340 will be shut down. Aug. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 8 Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 Typical Application Figure 12. Typical Application of AP4340 Aug. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 9 Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 Mechanical Dimensions TO-92(Bulk Packing) Unit: mm(inch) 1.000(0. 039) 3.430(0. 135) MIN 3.700(0.146) 3.300(0.130) 1.400(0. 055) 0.320(0. 013) 0.510(0. 020) 0. 000(0. 000) 0. 380(0. 015) Φ1. 600(0. 063) MAX 4.700(0.185) 1.270(0. 050) TYP Aug. 2011 15.500(0.610) 0.360(0. 014) 0.760(0. 030) 12.500(0.492) 4.300(0.169) 4.400(0. 173) 4.800(0. 189) 2.420(0. 095) 2.660(0.105) Rev. 1. 1 BCD Semiconductor Manufacturing Limited 10 Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 Mechanical Dimensions (Continued) TO-92 (Ammo Packing) Aug. 2011 Rev. 1. 1 Unit: mm(inch) BCD Semiconductor Manufacturing Limited 11 Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 Mechanical Dimensions (Continued) SOT-23 Aug. 2011 Rev. 1. 1 Unit: mm(inch) BCD Semiconductor Manufacturing Limited 12 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein. 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