FAC34063AP FS | Alldatasheet

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Technical content

DC/DC Converter Controller The FAC34063AP/AF series is a monolithic control circuit containing the primary functions required for DC-to-DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit. driver and high current output switch. This series was specifically designed to be incorporated in Step-Down or Step-Up or Voltage-Inverting applications with a minimum number of external components.

FEATURES

Operation from 3.0V to 40V input. Low Standby Current. Current Limiting. Output Switch Current to 1.5A. Output Voltage Adjustable. Frequency Operation to 100kHz. Precision 2% Reference. 8 5 1 4 Q DIP-8 A B d P D H L W T G DIM MILLIMETERS A B D T P d G H L 3 8 0 3 0 - 15 1 52 0 1 W 9 6 0 2 6 45 0 2 0 46 0 1 0 50 MIN 3 3 0 3 2 54 0 25+0 1/-0 05 7 62 Q + _ + _ + _ + _ + _ + _ SOP-8 L 1 4 5 8 1 B P D H A G T 2 B 0 20+0 1/-0 05 P T 1 27 MILLIMETERS 0 4 0 1 0 15+0 1/-0 05 4 85 0 2 G H L D A DIM 6 02 0 3 1 63 0 2 0 65 0 2 3 94 0 2 + _ + _ + _ + _ + _ + _ SWITCH COLLECTOR SWITCH EMITTER TIMING CAPACITOR GND COMPARATO R COLLECTOR V INVERTING I SENSE INPUT CC PK DRIVER 2007. 5. 20 1/7 SEMICONDUCTOR TECHNICAL DATA FAC34063AP/AF Revision No : 1

R I OSCILLATOR CPK T COMPARATOR 1.25V REFERENCE REGULATOR SWITCH COLLECTOR EMITTER SWITCH CAPACITOR TIMING GNDCOMPARATOR V SENSE I DRIVER COLLECTOR CC PK INVERTING INPUT BLOCK DIAGRAM MAXIMUM RATINGS (Ta=25℃) CHARACTERISTIC SYMBOL RATING UNIT Power Supply Voltage VCC 40 V Comparator Input Voltage Range VIR -0.3 ~ 40 V Switch Collector Voltage VC(SWITCH) 40 V Switch Emitter Voltage (VPIN1=40V) VE(SWITCH) 40 V Switch Collector to Emitter Voltage VCE(SWITCH) 40 V Driver Collector Voltage VC(DRIVER) 40 V Driver Collector Current (Note 1) IC(DRIVER) 100 mA Switch Current ISW 1.5 A Power Dissipation FAC34063AP PD 500 mW FAC34063AF 320 Operating Temperature Topr -40 ~ 85 Storage Temperature Tstg -65 ~ 150 Note 1) Maximum package power dissipation limits must be observed. 2007. 5. 20 2/7 FAC34063AP/AF Revision No : 1

CHARACTERISTIC SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Supply Current ICC VCC=5.0 ~ 40V, CT=1.0nF, Pin 7=VCC, Pin 2=GND, V ＞PIN5 VTH, remaining pins open CHARACTERISTIC SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Threshold Voltage VTH1 Ta=25℃ 1.225 1.25 1.275 V Threshold Voltage VTH2 Ta=T ~LOW THIGH 1.21 - 1.29 V Threshold Voltage Line Regulation Reg line VCC=3.0 ~ 40V - 1.4 5.0 mV Input Bias Current IIB VIN=0 - -40 -400 nA CHARACTERISTIC SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Frequency fOSC VPIN5=0V, CT=1.0nF 24 33 42 kHz Charge Current ICHG VCC=5.0 ~ 40V 24 33 42 μA Discharge Current IDISCHG VCC=5.0 ~ 40V 140 200 260 μA Discharge to Charge Current Ratio IDISCHG/ICHG Pin 7 ~ VCC 5.2 6.5 7.5 - Current Limit Sense Voltage VIPK(SENSE) IDISCHG=ICHG 250 300 350 mV ELECTRICAL CHARACTERISTICS (VCC=5.0V, Ta=25℃, unless otherwise specified) OSCILLATOR SECTION OUTPUT SWITCH SECTION (Note 2) COMPARATOR SECTION TOTAL DEVICE CHARACTERISTIC SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Saturation Voltage, Darlington Connection VCE(SAT1) ISW=1.0A, Pins 1, 8 Connection - 1.0 1.3 V Saturation Voltage (Note 3) VCE(SAT2) ISW=1.0A, Forced β = 20 RPIN8=82 Ω to VCC - 0.45 0.7 V DC Current Gain hFE ISW=1.0A, VCE=5.0A, 50 120 - - Collector Off-State Current IC(OFF) VCE=40V - 0.01 100 μA Note) 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 3. If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (≤ 300mA) and high driver currents (≥30mA), it may take up to 2.0μS for it to come out of saturation. This condition will shorten the off time at frequencies ≥30kHz, and is magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non-Darlington configuration is used, the following output drive condition is recommended ; IC outputForced of output switch : ≥ 10IC driver-7.0mA * * The 100Ω resistor in the emitter of the driver device requires about 7.0mA before the output switch conducts. 2007. 5. 20 3/7 FAC34063AP/AF Revision No : 1 2.5 4.0 mA

R I OSC C PK T COMP. + 1.25V REF REG L 170 µH 1N5819/SS14 C 330uF2.2㏀R1 47㏀ V R 0.22Ω 12V 100uF V 1500 pF 28V/175mA V in sc 180Ω O out C T CC 1.0 µH ( 100uF V OUT OPTIONAL FILTER APPLICATION CIRCUIT (1) Step-up Converter TEST CONDITIONS RESULTS Line Regulation V IN =8.0V to 16V, I O =175mA 30mV= ± 0.05% Load Regulation V IN =12V, I O =75mA to 175mA 10mV= ± 0.017% Output Ripple V IN =12V, I O =175mA 300 mVpp Efficiency V IN =12V, I O =175mA 89% 2007. 5. 20 4/7 FAC34063AP/AF Revision No : 1

R I OSC C PK T COMP. + 1.25V REF REG ( C 470uF1.2㏀R1 3.6㏀ V R 0.33 25V 100uF V 470 pF 5.0V/500mA V in sc O out C T CC 1.0 µH ( 100uF V OUT OPTIONAL FILTER 220 µH L 1N5819/SS14 (2) Step-Down Converter TEST CONDITIONS RESULTS Line Regulation V IN =15V to 25V, I O =500mA 5mV Load Regulation V IN =25V, I O =50mA to 500mA 3.0mV Output Ripple V IN =25V, I O =500mA 100 mVpp Short Circuit Current V IN =25V, R L =0.1Ω 1.2A Efficiency V IN =25V, I O =500mA 80% 2007. 5. 20 5/7 FAC34063AP/AF Revision No : 1

R I OSC C PK T COMP. + 1.25V REF REG ( C 8.2㏀R2 953 V R 0.24Ω 4.5V TO 6.0V 100uF V 1500 pF -12V/100mA V in sc + O out CC 1.0 µH ( 100uF V OUT OPTIONAL FILTER 1N5819/SS14 88 µH L 1000uF (2) Voltage Inverting Converter TEST CONDITIONS RESULTS Line Regulation V IN =4.5V to 6.0V, I O =100mA 3.0mV= ± 0.012% Load Regulation V IN =5.0V, I O =10mA to 100mA 0.022V= ± 0.09% Output Ripple V IN =5.0V, I O =100mA 500 mVpp Short Circuit Current V IN =5.0V, R L =0.1Ω 0.9A Efficiency V IN =5.0V, I O =100mA 58% 2007. 5. 20 6/7 FAC34063AP/AF Revision No : 1

  1. 5. 20 7/7 FAC34063AP/AF Revision No : 1 C a l c ul at i on Param e t e r S t e p - U p (Di s cont i nuous m ode) St ep-Down (C ont i nuous m ode) Vol t a ge Invert i ng (Di s cont i nuous m ode) t on /t of f V out +V F -V in(m in) V out +V F I Vout + V F V in(m in) - V sat V in(m in) - V sat - V out V in - V sat (t on + t of f )m a x 1 / f mi n 1/ f mi n 1/ f mi n C T 4.5x10 -5 t on 4.5x10 -5 t on 4.5x10 -5 t on I PK(switch) 2I out(m ax) [ (t on /t of f )+1 ] 2I out(m a x) 2I out(m ax) [ (t on /t of f )+1 ] R SC 0.3/ I PK(switch) 0.3/ I PK(switch) 0.3/ I PK(switch) C O I out t on I PK(switch) (t on + t of f ) I out t on ≡ V ripple(p-p) 8 V ripple(p-p) ≡ V ripple(p-p) L(m i n ) V in(m in) - V sat V in(m i n) -V sat -V out V in(m in) - V sat I PK(switch) t on(m a x) I PK(switch) t on(m a x) I PK(switch) t on(m a x) NOTES: V sat = Saturation voltage of the output switch V F = Forward voltage drop of the output rectifier THE FOLLOWING POWER SUPPLY CHARACTERISTICS MUST BE CHOSEN: V in = Nominal input voltage V out = Desired output voltage, | V | out = 1.25(1+R 2 /R 1 ) I out = Desired output current fmin = Minimum desired output switching frequency at the selected values of Vin and lo V ripple = Desired peak to peak output ripple voltage. In practice, the calculated capacitor value will and to be increased due to its equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and load regulation. I