MC34063AD. DC to DC CONVERTER CONTROL CIRCUITS
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1 Order this document by MC3403A/D The MC3403A 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 and Step Up and Voltage Inverting applications with a minimum number of external components. Refer to Application Notes AN90A/D and AN94/D for additional design information. Operation from 3.0 V to 40 V Input Low Standby Current Current Limiting Output Switch Current to. A Output Voltage Adjustable Frequency Operation to 00 khz Precision % Reference DC to DC CONVERTER CONTROL CIRCUITS SEMICONDUCTOR TECHNICAL DATA P, P SUFFIX PLASTIC PACKAGE CASE D SUFFIX PLASTIC PACKAGE CASE (SO ) PIN CONNECTIONS Drive Collector Ipk Sense VCC Comparator Inverting Input Representative Schematic Diagram Ipk Oscillator S Q MOTOROLA ANALOG IC DEVICE DATA R CT Comparator 00 (Bottom View) Q. V Reference Regulator Q This device contains active transistors. 3 Switch Collector Switch Emitter Timing Capacitor 4 Gnd Switch Collector Switch Emitter Timing Capacitor Device Gnd MC3303AVP 3 4 (Top View) Operating Temperature Range Driver Collector ORDERING INFORMATION MC3303AD MC3303AP T A = 40 to C MC3303AVD T A = 40 to C MC3403AD MC3403AP TA = 0 to 0 C Ipk Sense VCC Comparator Inverting Input Package SO Plastic DIP SO Plastic DIP SO Plastic DIP Motorola, Inc. 99 Rev
2 MAXIMUM RATINGS MC3403A MC3303A Rating Symbol Value Unit Power Supply Voltage VCC 40 Vdc Comparator Input Voltage Range VIR 0.3 to 40 Vdc Switch Collector Voltage VC(switch) 40 Vdc Switch Emitter Voltage (VPin = 40 V) VE(switch) 40 Vdc Switch Collector to Emitter Voltage VCE(switch) 40 Vdc Driver Collector Voltage VC(driver) 40 Vdc Driver Collector Current (Note ) IC(driver) 00 ma Switch Current ISW. A Power Dissipation and Thermal Characteristics Plastic Package, P, P Suffix TA = C PD. W Thermal Resistance RθJA 00 C/W SOIC Package, D Suffix TA = C PD W Thermal Resistance RθJA 0 C/W Operating Junction Temperature TJ 0 C Operating Ambient Temperature Range TA C MC3403A 0 to 0 MC3303AV 40 to MC3303A 40 to Storage Temperature Range Tstg to 0 C NOTES:. Maximum package power dissipation limits must be observed.. ESD data available upon request. ELECTRICAL CHARACTERISTICS (VCC =.0 V, TA = Tlow to Thigh [Note 3], unless otherwise specified.) Characteristics Symbol Min Typ Max Unit OSCILLATOR Frequency (VPin = 0 V, CT =.0 nf, TA = C) fosc khz Charge Current (VCC =.0 V to 40 V, TA = C) Ichg µa Discharge Current (VCC =.0 V to 40 V, TA = C) Idischg µa Discharge to Charge Current Ratio (Pin to VCC, TA = C) Idischg/Ichg... Current Limit Sense Voltage (Ichg = Idischg, TA = C) Vipk(sense) mv OUTPUT SWITCH (Note 4) Saturation Voltage, Darlington Connection (Note ) (ISW =.0 A, Pins, connected) Saturation Voltage, Darlington Connection (ISW =.0 A, RPin = Ω to VCC, Forced β 0) VCE(sat).0.3 V VCE(sat) V DC Current Gain (ISW =.0 A, VCE =.0 V, TA = C) hfe 0 Collector Off State Current (VCE = 40 V) IC(off) µa NOTES: 3. T low = 0 C for MC3403A, 40 C for MC3303A, AV T high = 0 C for MC3403A, C for MC3303A, C for MC3303AV 4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.. If the output switch is driven into hard saturation (non Darlington configuration) at low switch currents ( 300 ma) and high driver currents ( 30 ma), it may take up to.0 µs for it to come out of saturation. This condition will shorten the off time at frequencies 30 khz, 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 output Forced of output switch : I C driver.0 ma * 0 *The 00 Ω resistor in the emitter of the driver device requires about.0 ma before the output switch conducts. MOTOROLA ANALOG IC DEVICE DATA
3 t MC3403A MC3303A ELECTRICAL CHARACTERISTICS (continued) (VCC =.0 V, TA = Tlow to Thigh [Note 3], unless otherwise specified.) Characteristics Symbol Min Typ Max Unit COMPARATOR Threshold Voltage TA = C TA = Tlow to Thigh Threshold Voltage Line Regulation (VCC = 3.0 V to 40 V) MC3303A, MC3403A MC3333AV Vth Regline Input Bias Current ( = 0 V) IIB na V mv TOTAL DEVICE Supply Current (VCC =.0 V to 40 V, CT =.0 nf, Pin = VCC, VPin > Vth, Pin = Gnd, remaining pins open) ICC 4.0 ma NOTES: 3. T low = 0 C for MC3403A, 40 C for MC3303A, AV T high = 0 C for MC3403A, C for MC3303A, C for MC3303AV 4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.. If the output switch is driven into hard saturation (non Darlington configuration) at low switch currents ( 300 ma) and high driver currents ( 30 ma), it may take up to.0 µs for it to come out of saturation. This condition will shorten the off time at frequencies 30 khz, 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 output Forced of output switch : I C driver.0 ma * 0 *The 00 Ω resistor in the emitter of the driver device requires about.0 ma before the output switch conducts. Figure. Output Switch On Off Time versus Oscillator Timing Capacitor Figure. Timing Capacitor Waveform, OUTPUT SWITCH ON-OFF TIME ( s) on off µ VCC =.0 V Pin = VCC Pin = Gnd TA = C CT, OSCILLATOR TIMING CAPACITOR (nf) ton toff, OSCILLATOR VOLTAGE (V) OSC V VCC =.0 V Pin = VCC Pin = Gnd Pins,, = Open CT =.0 nf TA = C 0 µs/div 00 mv/div MOTOROLA ANALOG IC DEVICE DATA 3
4 I MC3403A MC3303A CE(sat), SATURATION VOLTAGE (V) V Figure 3. Emitter Follower Configuration Output Saturation Voltage versus Emitter Current.3 VCC =.0 V. Pins,, = VCC Pins 3, = Gnd. TA = C (See Note 4) IE, EMITTER CURRENT (A) CE(sat), SATURATION VOLTAGE (V) V Figure 4. Common Emitter Configuration Output Switch Saturation Voltage versus Collector Current VCC =.0 V Pin = VCC Pins, 3, = Gnd TA = C (See Note 4) Darlington Connection Forced β = IC, COLLECTOR CURRENT(A) IPK(sense), CURRENT LIMIT SENSE VOLTAGE (V) V Figure. Current Limit Sense Voltage versus Temperature VCC =.0 V Ichg = Idischg TA, AMBIENT TEMPERATURE ( C) CC, SUPPLY CURRENT (ma) Figure. Standby Supply Current versus Supply Voltage CT =.0 nf Pin = VCC Pin = Gnd VCC, SUPPLY VOLTAGE (V) NOTE: 4. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 4 MOTOROLA ANALOG IC DEVICE DATA
5 MC3403A MC3303A Figure. Step Up Converter 0 µh L 0 S Q Q R Q V VCC Ipk CT Osc. V Comp. Ref Reg 3 CT 00 pf 4 N9 R. k R 4 k.0 µh V/ ma 330 CO 00 Optional Filter Test Conditions Results Line Regulation =.0 V to V, IO = ma 30 mv = ±0.0% Load Regulation = V, IO = ma to ma 0 mv = ±0.0% Output Ripple = V, IO = ma 400 mvpp Efficiency = V, IO = ma.% Output Ripple With Optional Filter = V, IO = ma 40 mvpp Figure. External Current Boost Connections for IC Peak Greater than. A a. External NPN Switch b. External NPN Saturated Switch (See Note ) R R 0 for constant NOTE:. If the output switch is driven into hard saturation (non Darlington configuration) at low switch currents ( 300 ma) and high driver currents ( 30 ma), it may take up to.0 µs to come out of saturation. This condition will shorten the off time at frequencies 30 khz, 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. MOTOROLA ANALOG IC DEVICE DATA
6 MC3403A MC3303A Figure 9. Step Down Converter S R Q Q Q 0.33 V 00 VCC Ipk Osc Comp. CT. V Ref Reg N9 3 L CT 4 40 pf 0 µh R. k R 3. k 40 CO.0 V/00 ma.0 µh 00 Optional Filter Test Conditions Results Line Regulation = V to V, IO = 00 ma mv = ±0.% Load Regulation = V, IO = 0 ma to 00 ma 3.0 mv = ±0.03% Output Ripple = V, IO = 00 ma 0 mvpp Short Circuit Current = V, RL = 0. Ω. A Efficiency = V, IO = 00 ma 3.% Output Ripple With Optional Filter = V, IO = 00 ma 40 mvpp Figure 0. External Current Boost Connections for IC Peak Greater than. A 0a. External NPN Switch 0b. External PNP Saturated Switch MOTOROLA ANALOG IC DEVICE DATA
7 MC3403A MC3303A Figure. Voltage Inverting Converter S Q Q R Q V to.0 V 00 VCC Ipk Osc Comp. CT. V Ref Reg 3 L µh 00 pf N9 4 R. k R µf CO.0 µh V/00 ma 00 Optional Filter Test Conditions Results Line Regulation = 4. V to.0 V, IO = 00 ma 3.0 mv = ±0.0% Load Regulation =.0 V, IO = 0 ma to 00 ma 0.0 V = ±0.09% Output Ripple =.0 V, IO = 00 ma 00 mvpp Short Circuit Current =.0 V, RL = 0. Ω 90 ma Efficiency =.0 V, IO = 00 ma.% Output Ripple With Optional Filter =.0 V, IO = 00 ma 0 mvpp Figure. External Current Boost Connections for IC Peak Greater than. A a. External NPN Switch b. External PNP Saturated Switch MOTOROLA ANALOG IC DEVICE DATA
8 MC3403A MC3303A Figure 3. Printed Circuit Board and Component Layout (Circuits of Figures, 9, ).4.00 (Top view, copper foil as seen through the board from the component side) MC3403A MC3403A MC3403A (Top View, Component Side) *Optional Filter. INDUCTOR DATA Converter Inductance (µh) Turns/Wire Step Up 0 3 Turns of # AWG Step Down 0 4 Turns of # AWG Voltage Inverting Turns of # AWG All inductors are wound on Magnetics Inc. toroidal core. MOTOROLA ANALOG IC DEVICE DATA
9 MC3403A MC3303A Figure 4. Design Formula Table Calculation Step Up Step Down Voltage Inverting ton/toff V out V V F in(min) V V in(min) sat V out V F V in(min) V sat V out V out V F V V in sat (ton toff) f toff t on t off t on t off f t on t off t on t off f t on t off t on t off ton (ton toff) toff (ton toff) toff (ton toff) toff CT 4.0 x 0 ton 4.0 x 0 ton 4.0 x 0 ton Ipk(switch) I out(max). t on t off. I out(max) I out(max). t on t off. 0.3/Ipk(switch) 0.3/Ipk(switch) 0.3/Ipk(switch) I pk(switch). t on(max). (V in(min) V sat ) I pk(switch). t on(max) L(min). (V in(min) V sat ) I pk(switch). t on(max). (V in(min) V sat V out ) CO 9 I out t on I (t pk(switch) on t ) off 9 V ripple(pp) V ripple(pp) I out t on V ripple(pp) 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, I out Desired output current. V out.. R R. f min Minimum desired output switching frequency at the selected values of V in and I O. V ripple(pp) Desired peak to peak output ripple voltage. In practice, the calculated capacitor value will need to be increased due to its equivalent series V ripple(pp) resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and load regulation. NOTE: For further information refer to Application Note AN90A/D and AN94/D. MOTOROLA ANALOG IC DEVICE DATA 9
10 MC3403A MC3303A OUTLINE DIMENSIONS P, P SUFFIX PLASTIC PACKAGE CASE 0 ISSUE K 4 F B NOTES:. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL.. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS). 3. DIMENSIONING AND TOLERANCING PER ANSI Y4.M, 9. NOTE T SEATING PLANE H A G D N C K 0.3 (0.00) M T A M B M L J M DIM A B C D F G H J K L M N MILLIMETERS MIN MAX BSC BSC INCHES MIN MAX BSC BSC D SUFFIX PLASTIC PACKAGE CASE 0 (SO ) ISSUE P A 4 B 4X P 0. (0.00) M B M NOTES:. DIMENSIONING AND TOLERANCING PER ANSI Y4.M, 9.. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0. (0.00) PER SIDE.. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0. (0.00) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. T X D K C SEATING PLANE 0. (0.00) M T B S A S M R X 4 J F MILLIMETERS INCHES DIM MIN MAX MIN MAX A B C D F G. BSC 0.00 BSC J K M 0 0 P R MOTOROLA ANALOG IC DEVICE DATA
11 MC3403A MC3303A NOTES MOTOROLA ANALOG IC DEVICE DATA
12 MC3403A MC3303A Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Typical parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including Typicals must be validated for each customer application by customer s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; JAPAN: Nippon Motorola Ltd.; Tatsumi SPD JLDC, F Seibu Butsuryu Center, P.O. Box 09; Phoenix, Arizona or Tatsumi Koto Ku, Tokyo 3, Japan MFAX: RMFAX0@ .sps.mot.com TOUCHTONE ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; B Tai Ping Industrial Park, INTERNET: NET.com Ting Kok Road, Tai Po, N.T., Hong Kong. 99 MOTOROLA ANALOG IC DEVICE MC3403A/D DATA
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