iru3048 International Rectifier Corp., iru3048 Datasheet
iru3048
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iru3048 Summary of contents
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... TYPICAL APPLICATION 12V 5V 3. OUT3 Figure 1 - Typical application of IRU3048 configured as 2-independent converter. PACKAGE ORDER INFORMATION T (° Rev. 1.7 09/12/02 DUAL SYNCHRONOUS PWM CONTROLLER CIRCUITRY AND LDO CONTROLLER DESCRIPTION The IRU3048 IC combines a Dual synchronous Buck controller and a linear regulator controller, providing a cost-effective, high performance and flexible solution for multi-output applications ...
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... IRU3048 ABSOLUTE MAXIMUM RATINGS Vcc Supply Voltage .................................................. 25V VcH1=VcH2 Supply Voltage ...................................... Storage Temperature Range ...................................... -65°C To 150°C Operating Junction Temperature Range ..................... PACKAGE INFORMATION 16-PIN PLASTIC TSSOP (F) TOP VIEW Gnd 1 16 Fb1 Fb2 Comp1 Fb3 3 14 Comp2 OUT3 VcH2 VcH1 ...
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... FB2 Freq V RAMP Tr C =1500pF =1500pF Fb=1V, Freq=200KHz ON T Fb=1.5V OFF I LDO V LDO FB I LDO(BIAS) www.irf.com IRU3048 MIN TYP MAX UNITS -0.1 mA -64 mA 400 mmho 600 mmho 180 200 220 KHz 1. 100 ns 50 100 ns 50 150 250 ...
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... PWM Comp1 Reset Dom Ramp1 Set1 Two Phase Oscillator Ramp2 Set2 S PWM Comp2 Q R Reset Dom 0. Vcc Figure 2 - Block diagram of the IRU3048. www.irf.com HDrv1 > LDrv2 Rev ...
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... PWM sig- nals increase from zero to the point the feedback loop takes control. Out of Phase Operation The IRU3048 drives its two output stages 1808 out of APPLICATION INFORMATION Design Example: The following example is a typical application for IRU3048 in current sharing mode ...
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... IRU3048 If the high value feedback resistors are used, the input bias current of the Fb pin could cause a slight increase in output voltage. The output voltage set point can be more accurate by using precision resistor. Soft-Start Programming The soft-start timing can be programmed by selecting the soft start capacitance value. The start up time of the ...
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... These values are taken under a certain condition test. For more detail please refer to the IRF7313 data sheet. By using equation (6), we can calculate the switching losses 187.2mW SW1 P = 78mW SW2 www.irf.com IRU3048 ---(6) LOAD (OFF) ...
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... IRU3048 Feedback Compensation The IRU3048 is a voltage mode controller; the control loop is a single voltage feedback path including error amplifier and error comparator. To achieve fast transient response and accurate output regulation, a compensa- tion circuit is necessary. The goal of the compensation network is to provide a closed loop transfer function with the highest 0dB crossing frequency and adequate phase margin (greater than 458) ...
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... The compensation network has three poles and two ze- ros and they are expressed as follows 2p3R 2p3R 2p3C 10 www.irf.com IRU3048 E Comp 5 V REF Frequency ...
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... IRU3048 Cross Over Frequency 2p3Lo3Co OSC Where Maximum Input Voltage Oscillator Ramp Voltage OSC Lo = Output Inductor Co = Total Output Capacitors The stability requirement will be satisfied by placing the poles and zeros of the compensation network according to following design rules. The consideration has been taken to satisfy condition 14 regarding transconduc- tance error amplifier ...
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... Comp2 3900pF 16.2K SS C24 0.1uF Figure 8 - Typical application of IRU3048 in an on-board DC-DC converter Rev. 1.7 09/12/02 directly to the drain of the high-side MOSFET, to reduce the ESR replace the single input capacitor with two par- allel units. The feedback part of the system should be kept away from the inductor and other noise sources, and be placed close to the IC ...
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... R5 Fb3 C14 C15 1K 1uF 47uF R9 C18 1800pF 46.4K R11 C19 1800pF 39.2K SS C24 0.1uF Figure 9 - Demo-board application of IRU3048 33uF L2 1uF 1uH 1 HDrv1 IRF7313 V 2. LDrv1 IRF7313 V 2. Fb1 ...
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... IRF7313 1 IRU3048CF 1 BAT54S 2 ELL6SH1R0M 1 ELLATV6R8M 1 ETQP6F102HFA 7 ECJ-2VF1C105Z 2 ECS-T1CD336R 2 ECJ-2VF1E104Z 1 ECJ-3YB1E105K 2 ECS-T1AD476R 2 ECJ-2VC1H471J 2 ECJ-2VB1H182K 1 16TPB47M 5 6TPC150M www.irf.com IRU3048 Manuf Web site (www.) IR irf.com Panasonic maco.panasonic.co.jp Panasonic Panasonic Panasonic Panasonic Panasonic Panasonic Panasonic Panasonic Panasonic Sanyo sanyo.com/industrial Sanyo 13 ...
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... IRU3048 WAVEFORMS 2A 0A Figure 4 - Transient response @ I for 3.3V output. Figure 6 - Transient response @ I for 2.5V output Figure 5 - Transient response @ I OUT = Figure 7 - Output voltage ripple for 3.3V @ 4A. OUT www.irf.com OUT for 1.8V output. Rev. 1.7 09/12/02 ...
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... Figure 11 - Gate signals for 1.8V output. Ch1: Output current 2A/div. Ch2: Gate signal for control FET 10V/div. Ch3: Gate signal for sync FET 10V/div. Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 02/01 www.irf.com IRU3048 TAC Fax: (310) 252-7903 15 ...
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... IRU3048 A 1.0 DIA E PIN NUMBER NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. 16 (F) TSSOP Package 16-Pin 16-PIN SYMBOL DESIG MIN NOM MAX 0.65 BSC A B 4.30 4.40 4.50 C 6.40 BSC D 0.19 --- 0.30 E 1.00 F 1.00 G 4.90 5.00 5.10 H --- --- 1.10 J 0.85 0.90 0.95 K 0.05 --- 0.15 L 128 REF M 128 REF N 08 --- 88 O 1.00 REF P 0.50 0.60 0.75 Q 0.20 R 0.09 --- --- R1 0.09 --- --- www ...
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... Surface Mount, Narrow Body A B PIN NO. 1 NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. Rev. 1.7 09/12/02 (S) SOIC Package C E DETAIL 0.38 0.015 16-PIN SYMBOL MIN MAX A 9.80 9.98 B 1.27 BSC 0.51 REF C D 0.36 0.46 E 3.81 3.99 F 1.52 1.72 G 0.10 0. BSC I 0.19 0.25 J 5.80 6. 0.41 1.27 T 1.37 1.57 www.irf.com IRU3048 H L DETAIL ...
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... IRU3048 PACKAGE SHIPMENT METHOD PKG PACKAGE DESIG DESCRIPTION F TSSOP Plastic S SOIC, Narrow Body 1 1 Feed Direction Figure A IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 18 PIN PARTS COUNT PER TUBE 16 --- Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice ...