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AP3842 Datasheet(PDF) 2 Page - Anachip Corp |
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AP3842 Datasheet(HTML) 2 Page - Anachip Corp |
2 / 8 page High Performance Current Mode PWM Controller AP3842/3/4/5 Anachip Corp. www.anachip.com.tw Rev.1.0 Oct.11, 2004 2/8 Block Diagram ( toggle flip flop used only in AP3844 and AP3845 ) S/R 5V REF T S R R 2R 1V CURRENT SENSE COMPARATOR PWM LATCH 8 6 OUTPUT VREF 5V 50mA INTERNAL BIAS VREF GOOD LOGIC 2.50V OSC. ERROR AMP. 2 1 3 4 5 7 Vi GROUND RT/CT VFB COMP CURRENT SENSE 16V AP384X UVLO 36V Absolute Maximum Ratings Symbol Parameter Value Unit Vi Supply Voltage (low impedance source) 36 V Vi Supply Voltage (li < 30mA) Self Limiting Io Output Current ±0.7 A Eo Output Energy (capacitive load) 5 µJ Analog Inputs (pins2,3) -0.3 to 5.5 V Error Amplifier Output Sink Current 10 mA Ptot Power Dissipation at Tamb ≦50 0C (PDIP8) 1.25 W Ptot Power Dissipation at Tamb ≦25 0C (SOP8) 800 mW Tstg Storage Temperature Range -65 to 150 oC TL Lead Temperature (soldering 10s) 260 oC *Notes: 1. All voltages are with respect to pin 5, all currents are positive into the specified terminal. Electrical Characteristics (Unless otherwise stated, these specifications apply for 0≦Tamb≦70 oC for AP384X ; Vi = 15V(note 5); RT = 10KΩ;CT = 3.3nF) AP384X Symbol Parameter Test Conditions Min. Typ. Max. Unit REFERENCE SECTION VREF Output Voltage Tj = 25 0C I0=1mA 4.90 5.00 5.10 V ∆VREF Line Regulation 12V≦Vi≦25V 2 20 mV ∆VREF Load Regulation 1mA≦Io≦20mA 3 25 mV ∆VREF/∆T Temperature Stability (Notes 2) 0.2 0.4 mV/ 0C Total Output Variation Line, Load, Temperature (Notes 2) 4.82 5.18 V eN Output Noise Voltage 10Hz≦f≦10KHz Tj=25 0C (Notes 2) 50 µV Long Term Stability Tamb=125 0C, 1000Hrs (Notes 2) 5 25 mV ISC Output Short Circuit current -85 -120 mA |
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