BM34063A BOOKLY | Alldatasheet

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Technical content

2006/01/25 www.bookly.com 1 Features Description z 3V to +37V Input Voltage Operation z Internal 1.6A Peak Curre nt Switch z Internal ±1.8% Reference z Low Quiescent Current at 1.6mA z Frequency from 100Hz ~ 12 0K Hz(100PF) z Output V olt age Adjustable z Active Current Limiting z Step-Up, Step-Down or Inverting Switching Regulators The BM34063A 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. Pin Assignment Pin1: Switch Collector (SWC) Pin5: Comparator Inverting Input (FB) Pin2: Switch Emitter (SWE) Pin6: Voltage Supply (Vcc) Pin3: Timing Capacitor (TC) Pin7: Ipk Sense (Ipk) DIP/SOP-8 SWC SWE TC GND DRC Ipk VCC FB Pin4: Ground (GND) Pin8: Voltage Driver Collector (DRC)

Ordering Information

H means : Pb device , BM34063AH will be closed before July of 2006. G means : Pb-free , BM34063AG meets SGS testing standard. If one day , you feel not good to AP1513 / MP9141 on price due to cost problem, you can choose BM34063A as +12V down to 3.3V/5.0V if less than 1A ouput. 在散热良好时,SOP8 ,+12Vin, 能输出 1A@5V 在散热良好时,DIP8 ,+12Vin 能输出 1A5@5V

/01/25 www.bookly.com 2 Absolute Maximum Ratings (Ta=25°C, Unles Otherwise Specified) Parameter Symbol Value Unit Power Supply Voltage VCC 40 V Comparator Input Voltage Range Vir -0.3~+40 V Switch Collector Voltage VC(SW) 40 V Switch Emitter Voltage VSWE 40 V Switch Emitter to Collector Voltage VCE 40 V Driver Collector Voltage VC(DR) 40 V Switch Current ISW 1.5 A DIP-8 1 Power Dissipation at Ta=25oC P D SO-8 0.625 W Operating Ambient Temperature Range Topr 0~+70 oC Storage Temperature Range Tstg -65~+150 oC Operating Junction Temperature Topj 120 oC Thermal Resistance Junction-ambient θJA 125 oC/W Block Diagram SC Pin1: 1.6A Switch Collector TC Pin3: Oscilletor Timing Capacitor GND Pin4: Power GND DRI Pin8: Driver Collector IPK Pin7: Highside Current Sense Input, VCC-VIPK=300mV VCC Pin6: Power Supply Input FB Pin5: Feedback Comparator Inverting Input SE Pin2: Darlington Switch Emitter 80Ω Q S R CT IPK Oscillator Comparator 1.25V Reference Voltage

2006/01/25 www.bookly.com 3 Electrical Characteristics (VCC=5V,Ta=0~70°C, unless otherwise specified) Parameter Symbol Test Condition Min. Typ. Max. Unit Oscillator Charging Current Ichg V CC=5~40V, Ta=25oC 10 25 40 uA Discharge Current Idischg V CC=5~40V, Ta=25oC 140 190 240 uA Frequency f OSC V PIN5=0, CT=1nF, Ta=25oC 32 42 4 52 KHz Discharge to Charge Current Ratio I dischg/Ichg VPIN7=VCC, Ta=25oC 5.2 6 7.5 Current Limit Sense Voltage V IPK I dischg=Ichg, Ta=25oC 250 300 350 mV Output Switch Saturation Voltage, Darlington Connection VCE(sat) 1 I SW=1A, VC(SW)=VC(DR) - 1 1.3 V Saturation Voltage VCE(sat) 2 I SW=1A, IC(DR)=50mA - 0.4 0.7 V DC Current Gain hFE I SW=1A, VCE=5V 35 120 - Collector Off-State Current ICC(off) V CE=40V, Ta=25oC - 10 100 uA Comparator Threshold Voltage VFB 1.23 1.25 1.27 V Threshold Voltage Line Regulation ∆VFB VCC=5~40V - 1.5 6 mV Input Bias Current IIB V IN=0V - 40 400 nA Total Device Supply Current ICC VCC=5~40V, VPIN7=VCC, VPin5>VFB, CT=0.001uF, Pin7=GND, Remaining pins open - 1.6 3 mA

Application Information

Calculation Step-Down Step-Up Voltage-Inverting ton/toff (V out+VF)/(Vin(min) -Vsat-Vout) (V out+VF-Vin(min))/(Vin(min)-Vsat) (|V out|+VF)/(Vin(max)-Vsat) (ton+toff) max 1/Fmin 1/F min 1/F min CT 4*10 -5ton 4*10 -5ton 4*10 -5ton IC(sw) 2*I out(max) 2*I out(max)(ton+toff/toff) 2*I out(max)(ton+toff/toff) RS 0.3/I C(sw) 0.3/I C(sw) 0.3/I C(sw) L(min) (V in(min)-Vsat/Ipk(sw))*ton(max) (V in(min)-Vsat/Ipk(sw))*ton(max) (V in(min)-Vsat/Ipk(sw))*ton(max) CO (I pk(sw)*(ton+toff))/(8*Vripple(P-P)) I out*ton/Vripple(P-P) I out*ton/Vripple(P-P) Vsat: Saturation voltage of the output switch. VF: Forward voltage drop of the ringback rectifier. The following power supply characteristics must be chosen: Vin: Nominal input voltage. Vout: Desired output voltage. |Vout|=1.25*(1+RB/RA) Iout: Desired output current Fmin: Minimum desired output switching frequency at the selected values for Vin and Iout. Vripple(P-P): Desired peak to peak output ripple voltage in practice, the calculated value will need to be increased due to the capacitor equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly effect the line and load regulation.

/25 www.bookly.com 4 Application Information (Continued) Vout 28V / 200mA R1 150Ω Cout 220uF CT 680pF Vin RA 2.2kΩ RSC 0.22 100uF BM34063A L1 D1 200uH 1N5819 RB 47kΩ Line Regulation: 100mV (Vin=8V~16V, @Io=200mA) Load Regulation: 5mV (Vin=12V, @Io=80mA~200mA) Fig.2 Step-Up Converter Fig.4 Step-Down Converter Line Regulation: 40mV (Vin=10V~20V, @Io=500mA) Load Regulation: 5mV (Vin=15V, @Io=10mA~500mA) Short Circuit Current: 1.3A (Vin=15V, @RL=0.1Ω BM34063A Vout 5V / 500mA RSC 0.25 RB RA 1.2kΩ 3.6kΩ CT 470pF 1N5819 200uH Cout 470uF 100uF Vin BM34063A RSC RA RB CT R2Vin Vout Cout Fig.3 Step-Up Converter With External NPN Switch

/01/25 www.bookly.com 5 Fig.5 Step-Down Converter With External PNP Saturation Switch Vout Vin BM34063A R2 R1 RSC RA RB Cout CT Fig.6 Voltage Inverting Converter Vout -12V / 100mA Cout 470uF 100uH 1N5819 CT 680pF BM34063A RSC 0.25 100uF RB 8.2kΩ RA 953Ω Vin 4.5V-6V Line Regulation: 20mV (Vin=4.5V~6V, @Io=100mA) Load Regulation: 100mV (Vin=5V, @Io=10mA~100mA) Fig.7 Voltage Inverting Converter With External PNP Saturation Switch Vout Cout R2BM34063A CT RSC RA RB Vin

/01/25 www.bookly.com 6 DIP-8 (P) Dimension SOP-8 (S) Dimension A B 8 7 65 43 21 H I F G J K M L α1E D C 8-Lead DIP-8 Plastic Package DIM Min. Max. A 6.29 6.40 B 9.22 9.32 C - *1.52 D - *1.27 E - *0.99 F 3.25 3.35 G 3.17 3.55 H 0.38 0.53 I 2.28 2.79 J 7.49 7.74 K - *3.00 L 8.56 8.81 M 0.229 0.381 α1 94 o o *: Typical, Unit: mm A B F C D E G Part A I H J K O M L N Part A 234 5678 Pin1 Index DIM Min. Max. A 4.85 5.10 B 3.85 3.95 C 5.80 6.20 D 1.22 1.32 E 0.37 0.47 F 3.74 3.88 G 1.45 1.65 H 4.80 5.10 I 0.05 0.20 J 0.30 0.70 K 0.19 0.25 L 0.37 0.52 M 0.23 0.28 N 0.08 0.13 O 0.00 0.15 *: Typical, Unit: mm 8-Lead SO-8 Plastic Surface Mounted Package

/01/25 www.bookly.com 7 Soldering Methods 1. Storage environment: Temperature=10oC~35oC Humidity=65%±15% 2. Reflow soldering of surface-mount devices Profile Feature Sn-Pb Eutectic Assembly Pb-Free Assembly Average ramp-up rate (TL to TP) <3 oC/sec <3 oC/sec Preheat - Temperature Min (Tsmin) - Temperature Max (Tsmax) - Time (min to max) (ts) 100oC 150oC 60~120 sec 150oC 200oC 60~180 sec Tsmax to TL - Ramp-up Rate <3oC/sec <3oC/sec Time maintained above: - Temperature (T - Time (tL) 183oC 60~150 sec 217oC 60~150 sec Peak Temperature (TP) 240 oC +0/-5oC 260 oC +0/-5oC Time within 5oC of actual Peak Temperature (tP) 10~30 sec 20~40 sec Ramp-down Rate <6oC/sec <6 oC/sec Time 25oC to Peak Temperature <6 minutes <8 minutes 3. Flow (wave) soldering (solder dipping) Products Peak temperature Dipping time Pb devices. 245oC ±5oC 5sec ±1sec Pb-Free devices. 260oC +0/-5oC 5sec ±1sec Figure 1: Temperature profile tP tL Ramp-down Ramp-up Tsmax Tsmin Critical Zone TL to TP tS Preheat TL TP t 25oC to Peak Time Temperature