APU3037 Advanced Power Electronics Corp., APU3037 Datasheet
APU3037
Specifications of APU3037
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APU3037 Summary of contents
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... Data and specifications subject to change without notice. Technology Licensed from International Rectifier 8-PIN SYNCHRONOUS PWM CONTROLLER DESCRIPTION The APU3037 controller IC is designed to provide a low cost synchronous Buck regulator for on-board converter applications. With the migration of today’s ASIC products requiring low supply voltages such as 1.8V and ...
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... LDrv 3 Gnd 4 =45℃/W θ =160 C/W without exposed pad (M) JA =15℃/W θ =80 C/W with exposed pad (MP) JA TEST CONDITION APU3037 APU3037A 5<Vcc<12 Supply Ramping Up Supply Ramping Up Fb Ramping Down (APU3037) (APU3037A) Freq=200KHz, C =1500pF L Freq=200KHz, C =1500pF L SS=0V SS=0V SS=0V IB SS/SD 8 Comp HDrv 70°C. Typical values refer ...
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... This pin provides soft-start for the switching regulator. An internal current source charges an external capacitor that is connected from this pin to ground which ramps up the output of the switching regulator, preventing it from overshooting as well as limiting the input current. The converter can be shutdown by pulling this pin below 0.5V. APU3037 / APU3037A TEST CONDITION SS=3V, Fb=1V SS=0V, Fb=1V ...
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... The outputs are protected against the short-circuit. The APU3037 protects the circuit for shorted output by sens- ing the output voltage (through the external resistor di- vider). The APU3037 shuts down the PWM signals, when the Fb voltage drops below 0.6V (0.4V for APU3037A). The APU3037 also protects the output from over-voltaging when the control FET is shorted ...
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... Output voltage is programmed by reference voltage and external voltage divider. The Fb pin is the inverting input of the error amplifier, which is internally referenced to 1.25V (0.8V for APU3037A). The divider is ratioed to pro- vide 1.25V at the Fb pin when the output is at its desired value. The output voltage is defined by using the follow- ...
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... This will result to a ripple approximately 14% of output cur- rent. Power MOSFET Selection The APU3037 uses two N-Channel MOSFETs. The se- lections criteria to meet power transfer requirements is based on maximum drain-source voltage (V source drive voltage (V ), maximum output current, On- ...
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... By using equation (6), we can calculate the switching losses 0.127W SW Feedback Compensation The APU3037 is a voltage mode controller; the control loop is a single voltage feedback path including error amplifier and error comparator. To achieve fast transient (Lower Switch) CON response and accurate output regulation, a compensa- tion circuit is necessary ...
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... APU3037 / APU3037A Note that this method requires that the output capacitor should have enough ESR to satisfy stability requirements. In general the output capacitor’s ESR generates a zero typically at 5KHz to 50KHz which is essential for an acceptable phase margin. The ESR zero of the output capacitor expressed as fol- ...
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... E/A output. It may exceed its source/sink output current capability, so that the ampli- fier will not be able to swing its output voltage over the necessary range. The compensation network has three poles and two ze- ros and they are expressed as follows: APU3037 / APU3037A ...
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... The IC's power dissipation results to an exces- sive temperature rise. This should be considered when using APU3037A for such application. Layout Consideration The layout is very important when designing high fre- quency switching converters. Layout will affect noise pickup and can cause a good design to perform with less than expected results ...
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... TYPICAL PERFORMANCE CHARACTERISTICS APU3037 / APU3037A APU3037A Vcc vs. Icc @470PF, 1150PF and 1540PF Gate Load C =1540pF LOAD Vcc (V) Figure 9 - Vcc vs. Icc APU3037A Vc vs. Ic @470PF, 1150PF and 1540PF Gate Load C =1540pF LOAD 6 8 ...
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... APU3037 / APU3037A TYPICAL PERFORMANCE CHARACTERISTICS Min ° ° ° ...
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... ° ° ° ° APU3037 / APU3037A Rise Time / Fall Time CL = 1500pF -25°C 0°C +25°C +50°C +75°C +100° ...
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... D3 1N4148 C3 C4 0.1uF 1uF Vcc Vc HDrv U1 SS/SD C8 APU3037 0.1uF LDrv Comp C9 Fb 680pF Gnd R4 105K Figure 18 - Typical application of APU3037 in an on-board DC-DC converter D1 1N4148 D2 1N4148 C2 2x 10TPB100ML, C5 100uF, 55m 0.1uF Q1 AP60T03GH 1N4148 744311470 4.7uH Q2 AP60T03GH R6 1.65K 1K, 1% using a single 5V supply ...
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... C13 APU3037 LDrv 0.1uF C14 Gnd R 5 14K Figure 19 - Typical application of APU3037 or APU3037A in an on-board DC-DC converter providing the Core, GTL+, and Clock supplies for the Pentium II microprocessor. APU3037 / APU3037A L1 1uH C 2 10TPB100M, 100uF 55m , 1.5A rms ...
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... APU3037 / APU3037A TYPICAL APPLICATION 1.8V to 7.5V / 0.5A Boost Converter Vpwr (1.5V Min) Vc/Vcc R 1 20K 2N2222 10K 100pF Q1 2N2222 R 3 20K Figure 20 - Typical application of APU3037 as a boost converter 1uF C 4 C10 C 5 0.01uF 0.1uF R 4 SS/SD Comp Vc 25K U1 APU3037 Fb Vcc LDrv Gnd C 8 1uF ...
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... D4 C1 LL4148 33uF 16V Gnd Vcc C8 1uF SS/SD U1 APU3037 C5 0.1uF Comp C4 2200pF Gnd R3 20K Figure 21 - Demo-board application of APU3037. Application Parts List Ref Desig Description Q1 MOSFET Q2 MOSFET U1 Controller D1, D2, D4 Diode L1 Inductor L2 Inductor C1 Capacitor, Tantalum C2A, C2B Capacitor, Poscap C9B, C9C Capacitor, Poscap ...
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... APU3037 / APU3037A DEMO-BOARD WAVEFORMS V =5.0V, V =3.3V IN OUT 100 Output Current (A) Figure 22 - Efficiency for APU3037 Evaluation Board. Vss APU3037 V OUT OUT Figure 24 - Shutdown the output by pulling down the soft-start. APU3037 2A 0A Figure 26 - Transient response @ I APU3037 ...
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... ADVANCED POWER ELECTRONICS CORP. Package Outline : SO Part Marking Information & Packing : SO-8 U3037XM/MP YWWSSS 1.All Dimension Are In Millimeters. 2.Dimension Does Not Include Mold Protrusions. DETAIL A Part Number Package Code Frequency Date Code (YWWSSS) Y：Last Digit Of The Year WW： ...
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... ADVANCED POWER ELECTRONICS CORP. Package Outline : TSSOP Part Marking Information & Packing : TSSOP-8 U3037XO YWWSSS SYMBOLS E E1 1.All Dimensions Are in Millimeters. 2.Dimension Does Not Include Mold Protrusions. A Part Number Frequency Package Code Date Code (YWWSSS) Y：Last Digit Of The Year WW： ...