Panasonic AN8083S free download

File name AN8083S.pdf

ICs for CD/CD-ROM Player AN8083S Low Voltage Operation IC for DC-DC Converter s Overview The AN8083S is an IC for controlling a DC-DC converter suitable for the switching power supply of various portable equipments. It can operate with input voltage 1.1V or more. 0.4 Unit : mm 1 2 3 16 15 14 13 12 11 10 9 1.5±0.2 10.1±0.3 0.4±0.25 s Features · Operatable with low voltage input (PVCC>1.1V) · Decreased voltage detection circuit built-in · Short-circuit protection feature built-in · Provided with reset output · Synchronizable with outside clock · Low consumption current in stand-by mode · Output voltage in secondary side; 4.8V+0.3V (Variable by using external resistance) 4 5 1.27 0.1±0.1 6 7 8 0.3 4.2±0.3 6.5±0.3 16-lead SOP package (SOP016-P-0225A) s Block Diagram RESET VCC EMP 15 16 13 VSEN 14 2.15V VREF START 10 CT 7 0.85V 0.25V + ­ 4.2V + ­ 1.25V 4.8V Starter SW Early Value Set. 2.0V + ­ ­25µA 30k 0.725V 0.9V 6 63k GND 0.7V ­ + ­ + + Power OFF Switching Circuit 11 POWER 3.0 2.5V 8 PVCC Starter Triangular Wave 9 CLK VREF 12 + ­ 1 IN 1.25V 2 FB 3 SPRO 4 DED 5 OUT 0.15 0.65 AN8083S s Absolute Maximum Ratings (Ta=25°C) Parameter Supply Voltage Power Dissipation Operating Ambient Temperature Storage Temperature Symbol VCC PVCC PD Topr Tstg ICs for CD/CD-ROM Player Rating 14.4 14.4 380 ­20 ~ +75 ­55 ~ +125 Unit V mW °C °C s Recommended Operating Range (Ta=25°C) Paramenter Operating Supply Voltage Range Symbol VCC PVCC Range 1.8V ~ 12V 1.1V ~ 12V s Electrical Characteristics (Ta=25°C) Parameter Power VCC Stand-by Mode Supply Current Power VCC Operating Mode Supply Current Output Voltage Reset Output Threshold Voltage Decreased Voltage Detection Threshold Voltage Short-Circuit Protection Operating Voltage Short-Circuit Protection Operating Voltage Oscillation Frequency in Normal Operation Oscillation Frequency at Start Output Voltage (Normal) Output Voltage (Normal) Symbol IPVCC IPVCC VO VTH (RESET) VTH (VSEN) VO (SPRO) VO (SPRO) fOSC1 fOSC2 VOH (OUT) VOL (OUT) PVCC=3V PVCC=3V VIN=0V, VPOWER=2V VIN=1V, VPOWER=0V RREF=33k, CT=330pF RREF=33k, CT=330pF VCC=1.9V, PVCC=3V IO= ­20mA, VCT=0V IO=20mA, VCT=1V 4 2.05 1.35 1.7 60 80 1.2 70 100 Condition VCC=0V, PVCC=3V VCC=3.1V, PVCC=3V 1.2 4.8 4.2 2.15 4.4 2.25 2.1 3.2 80 120 1.6 0.4 min. typ. max. 2 3 Unit µA mA V V V V V kHz kHz V V Note) Unless otherwise specified, VCC=4.8V, PVCC=3V s Application Circuit 4.8V±0.3V + RESET VCC EMP 15 16 13 VSENSE START 14 VREF 10 CT 7 330pF VREF 33k 12 2.15V 0.85V 0.25V + ­ + ­ Starter 1.25V 3.0V 2.5V Triangular Wave CLK 9 PVCC 8 POWER 4.2V 4.8V Starter SW Initial set 2.0V + ­ 0.7V 1.25V ­ + ­ + + Power OFF SW circuit 11 ­25µA 30k 0.725V 0.9V 63k + ­ GND 6 0.01µF 1 IN 33k 2 FB + 0.01µF 3 SPRO 47µF 4 DED 0.01µF 5 OUT 100 * Connect Pin11 to the secondary side and Pin10 to GND at oscillation start. (Pin10 is always open.) ICs for CD/CD-ROM Player s Pin Description Pin No. 1 2 Symbol IN FB · Input pin for error amplifier · Thre