SE34063

SE34063 SEAWARD | Alldatasheet

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Technical content

Preliminary and all contents are subject to change without prior notice. ©2001SEAWARD ELECTRONICS INC. http:// www.seawardinc.com.cn Tel: 0086-(010)82895705, 82895706 1/5 Room1605, Building1, International Pioneering Park, No.1 Shangdi XinXi Road, Haidian District, Beijing 100085, China

DESCRIPTION

The SE34063 is a monolithic control circuit containing the primary functions required for DC-to-DC converter. The device consists of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This was s pecifically designed to be incorporated in Step-up, and Step-down and Voltage-Inverting applications with a minimum number of external components. PIN CONFIGURATIONS

FEATURES

¾ Operation from 3.0V to 35V input ¾ Dip-8 Packages ¾ Low Standby Current ¾ Output Switch Current to 1.5A ¾ Output Voltage Adjustable ¾ Frequency Operation to 100KHz ¾ Precision 2% Reference APPLICATION ¾ Battery charges ¾ Power supply adapter ¾ DC-to-DC converter, such as 12 to 5V. BLOCK DIAGRAM DIP-8 (Top View) DIP-8 SC SE TC GND DRIC Ipk Vcc CII 4 5 SOP-8 4 5 SOP-8 SC SE TC GND DRIC Ipk Vcc CII 1.25V Reference Ipk CT Oscillator Comparator S Q R Drive Collector 5 4 Sense Vcc Inverting Input Comparator Ipk Gnd Timing Capacitor Switch Switch Collector Emitter Regulator DC-to-DC Converter Control Circuit SSEE3344006633 SEAWARD ELECTRONICS INC.

Preliminary and all contents are subject to change without prior notice. ©2001SEAWARD ELECTRONICS INC. http:// www.seawardinc.com.cn Tel: 0086-(010)82895705, 82895706 2/5 Room1605, Building1, International Pioneering Park, No.1 Shangdi XinXi Road, Haidian District, Beijing 100085, China Absolute Maximum Ratings z Power Dissipation and Thermal Characteristics Plastic Package T

Electrical Characteristics

(Vcc=5.0V , TA=25℃, CT=1nF, unless otherwise specified.) Parameter Symbol Test Co nditions Min Typ Max Units 1.25V Reference Reference V oltage Vref Vcc=5V-25V 1.225 1.25 1.275 V Comparator Threshold V oltage Vth 1.225 1.25 1.275 V Output Switch (Note) Saturation V oltage, Darlington Connection Vce(sat) Isw=1.0A, Pin1, 8 connected - 1.0 1.3 V Saturation V oltage, Darlington Connection Vce(sat) Isw=1.0A, Rpin8=82Ω to Vcc, Forced β=20 - 0.45 0.7 V DC Current Gain Hfe Isw=1.0A, Vce=5.0V 50 75 - - Collector Off-State Current Ic(off) Vce=35V - 0.01 100 μA Oscillator Frequency fosc Vpin5=0V 24 33 42 kHz Charge Current Ichg Vcc=5.0v to 35V 24 35 42 μA Discharge Current Idischg Vcc=5.0v to 35V 140 220 260 μA Discharge to Charge Current Ratio Idischg/Ichg Pin7 to Vcc 5.2 6.5 7.5 - Current Limit Sense V oltage Vipk(sence) Ichg=Idischg 250 300 350 mV Total Device Supply Current Icc (Vcc=5 to 35V , Pin7=Vcc, Vpin5>Vth, Pin2=GND, the others open) - - 4.0 mA Note: Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. DC-to-DC Converter Control Circuit SSEE3344006633 SEAWARD ELECTRONICS INC.

Preliminary and all contents are subject to change without prior notice. ©2001SEAWARD ELECTRONICS INC. http:// www.seawardinc.com.cn Tel: 0086-(010)82895705, 82895706 3/5 Room1605, Building1, International Pioneering Park, No.1 Shangdi XinXi Road, Haidian District, Beijing 100085, China TYPICAL APPLICATION CIRCUIT Step-Up Converter Parameter Test Conditions Type Unit Line Regulation Vin=8V to 16V , Io=175mA 30 ±0.05% mV Load Regulation Vin=12V , Io=75mA to 175mA 10 ±0.017% mV Output Ripple Vin=12V , Io=175mA 400 mVp-p Efficiency Vin=12V , Io=175mA 87.7% - Output Ripple with Optional Filter Vin=12V , Io=175mA 40 mVp-p CIRCUIT Step-Down Converter Parameter Test Conditions Type Unit Line Regulation Vin=15V to 25V , Io=500mA 12 ±0.12% mV Load Regulation Vin=25V , Io=50mA to 500mA 3.0 ±0.03% mV Output Ripple Vin=25V , Io=500mA 120 mVp-p Efficiency Vin=25V , Io=500mA 83.7% - Short Circuit Current Vin=25V , R L=0.1Ω 1.1 A Output Ripple with Optional Filter Vin=25V , Io=500mA 40 mVp-p 1.25V Reference Ipk CT Oscillator Comparator S Q R 5 4 47KR22.2KR1 0.22 180 L 170uH 330u 1500PF CT Co IN5819 100u 100u (Optional Filter) 28V/175mA Vout 1.0uH Vout Vin=12V Regulator DC-to-DC Converter Control Circuit SSEE3344006633 SEAWARD ELECTRONICS INC.

Preliminary and all contents are subject to change without prior notice. ©2001SEAWARD ELECTRONICS INC. http:// www.seawardinc.com.cn Tel: 0086-(010)82895705, 82895706 4/5 Room1605, Building1, International Pioneering Park, No.1 Shangdi XinXi Road, Haidian District, Beijing 100085, China CIRCUIT Voltage Inverting Converter Parameter Test Conditions Type Unit Line Regulation Vin=4.5V to 6.0V , Io=100mA 3.0 ±0.012% mV Load Regulation Vin=5V , Io=10mA to 100mA 0.022 ±0.09% mV Output Ripple Vin=5V , Io=100mA 500 mVp-p Efficiency Vin=5V , Io=100mA 62.2% - Short Circuit Current Vin=5V , R L=0.1Ω 0.91 A Output Ripple with Optional Filter Vin=5V , Io=100mA 70 mVp-p CIRCUIT 1.25V Reference Ipk CT Oscillator Comparator S Q R 5 4 3.6KR21.2KR1 0.33 470u 470pF CT Co IN5819 100u 100u (Optional Filter) 5V/500mA Vout 1.0uH Vout Vin=25V 220uH Regulator L 1.25V Reference Ipk CT Oscillator Comparator S Q R 5 4 953R28.2KR1 0.24 1000u 1500pF CT Co IN5819 100u 100u (Optional Filter) -12V/100mA Vout 1.0uH Vout Vin=4.5V~6V 88uH Regulator L DC-to-DC Converter Control Circuit SSEE3344006633 SEAWARD ELECTRONICS INC.

Preliminary and all contents are subject to change without prior notice. ©2001SEAWARD ELECTRONICS INC. http:// www.seawardinc.com.cn Tel: 0086-(010)82895705, 82895706 5/5 Room1605, Building1, International Pioneering Park, No.1 Shangdi XinXi Road, Haidian District, Beijing 100085, China OUTLINE DRAWING DIP-8 OUTLINE DRAWING SOP-8 4 5 E F D a A B b e Z I L MIN MAX MIN MAX A a 0.020 0.51 B 0.045 0.065 1.15 1.65 b 0.014 0.022 0.356 0.55 b1 0.008 0.012 0.204 0.304 D 0.430 10.92 E 0.313 0.384 7.95 9.75 e F 0.260 6.60 I 0.200 5.08 L 0.125 0.150 3.18 3.81 Z 0.060 1.52 0.100 2.54 0.300 7.62 DIMENSIONS DIMN INCHE MM 0.131 3.32 4 5 H E D A B C MIN MAX MIN MAX A 0.0532 0.0688 1.35 1.75 A1 0.0040 0.0098 0.10 0.25 B 0.0130 0.0200 0.33 0.51 C 0.0075 0.0098 0.19 0.25 D 0.1890 0.1968 4.80 5.00 H 0.2284 0.2440 5.80 6.20 E 0.1497 0.1574 3.80 4.00 DIMENSIONS 0.050 BSC 1.27 BSC DIMN INCHES MM DC-to-DC Converter Control Circuit SSEE3344006633 SEAWARD ELECTRONICS INC.