apu3146o APEC, apu3146o Datasheet
apu3146o
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apu3146o Summary of contents
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... OUT3 HDrv1 Q2 R1 OCSet1 LDrv1 Q3 PGnd1 REF BAT54A U1 V APU3146 SEN1 V SEN2 Fb1 Fb2 HDrv2 Q4 R6 OCSet2 LDrv2 Q5 PGnd2 Gnd DEVICE PACKAGE 28-Pin TSSOP(/SOIC WB) APU3146O(/M) APU3146 y D1 C11 C14 L3 R5 C15 R10 C16 R11 C17 C18 L4 200407061-1/28 1.8V @ 30A ...
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APU3146 ABSOLUTE MAXIMUM RATINGS Vcc, V Supply Voltage .............................................. -0.5V To 16V CL VcH1 and VcH2 Supply Voltage ................................ PGOOD................. ................................................... Storage Temperature Range ...................................... -40°C To 125°C Operating Junction Temperature Range ..................... -40°C To 125°C Caution: Stresses above those ...
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PARAMETER Soft-Start Section Charge Current Power Good Section V Lower Trip Point SENS1 V Lower Trip Point SENS2 PGood Output Low Voltage Error Amp Section Fb Voltage Input Bias Current Transconductance 1 Transconductance 2 Error Amp Source/Sink Current Input Offset ...
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APU3146 DEADBAND TIME Tr 90% High Side 2V Driver HD 10% 90% Low Side 2V Driver LD 10% Deadband H_to_L PIN DESCRIPTIONS PIN# PIN SYMBOL PIN DESCRIPTION 1 PGood Power Good pin. Low when any of the outputs fall 10% ...
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PIN DESCRIPTIONS PIN# PIN SYMBOL PIN DESCRIPTION 26 V Non-inverting input to the second error amplifier. In the current sharing mode con- P2 nected to the programming resistor. In independent 2-channel mode it is connected to V pin ...
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APU3146 FUNCTIONAL DESCRIPTION Introduction The APU3146 is versatile device for high performance Buck converters included of two synchronous Buck con- trollers which can be operated both in two independent mode or in 2-phase mode. The timing of the ...
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Dual Soft-Start The APU3146 has programmable soft-start to control the output voltage rise and limit the inrush current during start-up. It provides a separate Soft-Start function for each outputs. This will enable to sequence the outputs by controlling the rise ...
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APU3146 For a given start up time, the soft-start capacitor can be calculated by: ≅ 25µA× START The soft-start is part of Over Current Protection scheme, during the overload or short circuit condition the external soft start capacitors ...
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Frequency Synchronization The APU3146 is capable of accepting an external digital synchronization signal. Synchronization will be enabled by the rising edge at an external clock. Per-channel switch- ing frequency is set by external resistor (Rt). The free running oscillator frequency ...
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APU3146 APPLICATION INFORMATION Design Example: The following example is a typical application for APU3146, the schematic is Figure18 on page17 12V 2.5V @ 10A OUT(2.5V 1.8V @ 10A OUT(1.8V) = Output voltage ripple ...
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Input Capacitor Selection The 180 out of phase will reduce the RMS value of the 0 ripple current seen by input capacitors. This reduces numbers of input capacitors. The input capacitors must be selected that can handle both the maximum ...
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APU3146 The gate drive requirement is almost the same for both MOSFETs. Logic-level transistor can be used and cau- tion should be taken with devices at very low V vent undesired turn-on of the complementary MOSFET, which results a in ...
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Feedback Compensation The APU3146 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 ...
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APU3146 F × ESR OSC × O1 × × Where Maximum Input Voltage Oscillator Ramp Voltage OSC F = ...
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2π×R × × 2π×R × 2π×R × ≅ F ...
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APU3146 Select a zero crossover frequency for control loop (F 1.25 times larger than zero crossover frequency for volt- age loop ( ≅ 1.25% H(Fo) = ×R ×R × m ...
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L1 12V 1uH C1 C2 47uF 47uF C3 C4 1uF 1uF C5 1uF R2 33K R3 C8 20nF 2. 18nF 2.61K PGood C10 0.1uF C15 0.1uF Figure 19 - Typical application of APU3146. 12V input and two independent ...
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APU3146 TYPICAL OPERATING CHARACTERISTICS Test Conditions: V =12V, V =2.5V, I =0-10A OUT1 OUT1 Figure 20 - Input Supply Ramps up. Ch1: 1.8V, Ch2: 2.5V, Ch3: Input Supply Figure 22 - Normal condition at No Load. Ch1: HDrv2, ...
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TYPICAL OPERATING CHARACTERISTICS Test Conditions: V =12V, V =2.5V, I =0-10A OUT1 OUT1 Figure 24 - Soft_Start. Ch1: SS2, Ch2: 1.8V, Ch3: SS1, Ch4: 2.5V Figure 26 - Deadband Time (1.8V Output). Ch1: LDrv2, Ch2: HDrv2, Ch3: Switching ...
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APU3146 TYPICAL OPERATING CHARACTERISTICS Test Conditions: V =12V, V =2.5V, I =0-10A OUT1 OUT1 Figure 28 - Shut Down (Pulling down the SS1 pin). Ch1: HDrv1, Ch2: LDrv1, Ch3: SS1 Figure 30 - High side and Low side ...
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TYPICAL OPERATING CHARACTERISTICS Test Conditions: V =12V, V =2.5V, I =0-10A OUT1 OUT1 Figure 32 - Load Transient Response. Ch2: 2.5V, Ch4: Step Load (0-10A) Ch3:ch4: 5A/div Figure 34 - Power Good Signal Ch1: Input Supply, Ch2: 2.5V ...
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APU3146 TYPICAL APPLICATION C12 L1 1uF 12V 1uH C1 C2 47uF 47uF 1uF CL 1uF Vcc C5 1uF Hiccup Sync V REF R2 Rt 33K R3 C8 Comp1 22nF 2.2K C6 120pF R4 C9 Comp2 12nF 8K ...
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TYPICAL APPLICATION C12 L1 1uF 12V 1uH C1 C2 47uF 47uF 1uF 1uF CL Vcc C5 1uF Hiccup Sync V REF R2 Rt 33K R3 C8 Comp1 22nF 2.2K C6 120pF R4 C9 Comp2 12nF 8K C7 ...
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APU3146 TYPICAL APPLICATION L2 5V 1uH C17 C18 3x 150uF 150uF C19 0.1uF D3 BAT54S C20 1uF L1 12V 1uH 47uF 47uF V 1uF CL 1uF Vcc C5 1uF Hiccup Sync V REF R2 Rt 33K ...
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TYPICAL APPLICATION L2 1uH 5V C17 C18 3x 150uF 150uF C19 0.1uF D3 BAT54S C20 C13 1uF L1 1uF 12V 1uH 47uF 47uF V VcH1 1uF 1uF CL Vcc C5 1uF Hiccup Sync V REF R2 ...
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APU3146 TYPICAL APPLICATION L1 5V 1uH C1 C2 47uF 47uF C3 C4 1uF 1uF C5 1uF R2 33K R3 C8 8.2nF 6K C6 47pF R4 C9 4.7nF 15K C7 27pF PGood C10 0.1uF C15 0.1uF Figure 40 - Single 5V ...
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TYPICAL APPLICATION 12V L1 5V 1uH 47uF 47uF 1uF 1uF C5 1uF R2 33K R3 C8 8.2nF 6K C6 47pF R4 C9 4.7nF 15K C7 27pF PGood C10 0.1uF C15 0.1uF 5V input, 12V drive and ...
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APU3146 TYPICAL APPLICATION 3. 1uH C1 C2 47uF 47uF C3 C4 1uF 1uF C5 1uF R2 33K R3 C8 4.7nF 15K C6 27pF R4 C9 5.6nF 8.2K C7 27pF PGood C10 0.1uF C15 0.1uF 5V to 2.5V and ...