mb3775pfv Fujitsu Microelectronics, Inc., mb3775pfv Datasheet
mb3775pfv
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FUJITSU SEMICONDUCTOR DATA SHEET ASSP SWITCHING REGULATOR CONTROLLER MB3775 LOW VOLTAGE DUAL PWM SWITCHING REGULATOR CONTROLLER The MB3775 is a dual pulse-width-modulation control circuit. It contains the basic circuits required for two PWM control circuits. Complete synchronization is obtained by ...
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MB3775 PIN ASSIGNMENT BLOCK DIAGRAM 1.28 V REF Reference 16 Voltage Error Amp 1 Error Amp (TOP VIEW ...
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OPERATION DESCRIPTION 1. Reference voltage The reference voltage circuit generates a stable, temperature-compensated 2.5 V reference from Vcc (pin 9) for use by internal circuits. A reference voltage of temperature compensated 1/2 Vref can be obtained to external circuit by ...
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MB3775 ABSOLUTE MAXIMUM RATING Parameter Power Supply Voltage Error Amp. Input Voltage Collector Output Voltage Collector Output Current Power Dissipation Operating Temperature Storage temperature *: The packages are mounted on the epoxy board ( 1.5 ...
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ELECTRICAL CHARACTERISTICS Parameter Output Voltage Output Temp. Stability Reference Input Stability Section Load Stability Short Circuit Output Current Under Threshold Voltage Voltage Lockout Hysteresis Width Protection Section Reset Voltage ( Input Threshold Voltage Input Stand by Voltage Protection ...
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MB3775 (Continued) Parameter Input Offset Voltage Input Offset Current Input Bias Current Common Mode Input Voltage Range Voltage Gain Error Amp. Frequency Band Width Section Common Mode Rejection Ratio Max Output Voltage Width Output Sink Current Output Source Current Input ...
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TEST CIRCUIT 0.1 F 330 pF TIMING CHART (Internal Waveform) Error Amp. output Triangular waveform oscillator output 1.9 V Dead Time PWM 1.5 V input voltage 1.3 V Short circuit protection 1.1 V comparator Reference input “High” ...
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MB3775 APPLICATION CIRCUIT 820 2 0 330 330 9 ...
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Fig Chopper Type Step Up/Inverting (For High Speed) 820 2 0 470 + 1 F ...
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MB3775 HOW TO SET OUTPUT VOLTAGE The output voltage is set using the connection shown in Fig. 5 and 6. The error amplifiers are supplied to the internal reference voltage circuit as are the other internal circuits. The common-mode input ...
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HOW TO SET TIME CONSTANT FOR TIMER LATCH SHORT PROTECTION CIRCUIT TIMING CHART shows the configuration of the protection latch circuit. Error amplifier outputs, are internally connected to the non-inverting inputs of the short-circuit protection com- parator and are compared ...
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MB3775 SYNCHRONIZATION OF ICs To synchronize MB3775 ICs, first, the specified capacitor and resistor are connected to the C of the master IC to start self oscillation. Next applied to the R charge/discharge circuit for triangular wave ...
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TYPICAL PERFORMANCE CHARACTERISTICS Fig Pow er supply voltage vs. Reference volt 2.0 1.5 1.0 0 Power supply voltage V CC Fig Power supply voltage vs. Stand by current 2.0 1.5 1.0 0.5 ...
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MB3775 Fig Timing resistor vs. Oscillation Frequency 1M 100k 10k 1k 100 1k 10k 100k Timing resistor R Fig Timing capacitor vs. Triangular waveform Max Amplitude voltage 2.2 Timing resistance= ...
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Fig Frequency vs. Gain/Phase (Actual Data =0. Gain Phase Frequency f (Hz) ...
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MB3775 APPLICATION 1. How to set the error amplifier frequency characteristic Figure 22 shows the equivalent circuit of the error amplifier. The frequency characteristic of the error amplifier is set by R ratio of resistors R and R in the ...
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Fig Error Amp. Frequency characteristics 0 (Large) (Small (Small) 20 (Large 100 1k 10k 100k Frequency f (Hz) Fig Error Amp. Frequency characteristics ...
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MB3775 Fig Ceramic Chip Capacitor (0.1 F) Temp. characteristic Temp. : Ratio 0. ...
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Effect of equivalent series resistance of smoothing capacitor The equivalent series resistance (ESR) of the smoothing capacitor in the DC/DC converter greatly affects the loop phase characteristic. A smoothing capacitor with a low ESR reduces system stability by increasing ...
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MB3775 Reference data If an aluminum electrolytic smoothing capacitor (R lytic capacitor (OS-CON 0.1 F Fig DC/DC Converter +5 V output 100 Frequency f (Hz) Fig. 34 ...
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Measures for ensuring system stability when a low ESR smoothing capacitor is used When a low ESR smoothing capacitor is used in the DC/DC converter, only the L and C are apparent even in the high-frequency region, and the ...
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MB3775 (2) As shown in Figure 37, a resistor (R advance the phase. The more R high-frequency range is also increased, which causes instability. Therefore, select the optimum resistance (see Fig. 38). Fig External circuit example 2 to ...
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As shown in Fig. 39, the phase is advanced by using both example 1 and 2 (Fig. 35 and 37). Fig External circuit example 3 to advance the phase Error amplifier input ripple voltage ...
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... The worker must put on a grounding device containing 250 k • Do not apply a negative voltage - Applying a negative voltage of 0 less to an LSI may generate a parasitic transistor, resulting in malfunction. ORDERING INFORMATION Part number MB3775P MB3775PF MB3775PFV resistors in series. Package 16-pin plastic DIP (DIP-16P-M04) 16-pin plastic SOP (FPT-16P-M06) ...
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PACKAGE DIMENSION 16-pin Plastic DIP (DIP-16P-M04) 19.55 +.008 .770 –.012 INDEX-1 INDEX-2 4.36(.172)MAX 3.00(.118)MIN +0.30 0.99 –0 +.012 .039 –0 1.27(.050) 2.54(.100) MAX TYP 1994 FUJITSU LIMITED D16033S-2C-3 C +0.20 –0.30 6.20±0.25 (.244±.010) 0.51(.020)MIN 0.25±0.05 (.010±.002) 0.46±0.08 (.018±.003) +0.30 1.52 ...
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MB3775 16-pin Plastic SOP (FPT-16P-M06) +0.25 +.010 * 1 10.15 .400 –0.20 –.008 16 INDEX 1 1.27(.050) 0.47±0.08 (.019±.003) 0.10(.004) 0.10(.004) 2002 FUJITSU LIMITED F16015S-c-4 Note Resin protrusion. (Each side : +0.15 (.006) Max). Note ...
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Plastic SSOP (FPT-16P-M05 5.00±0.10(.197±.004 INDEX LEAD No 0.65(.026) 0.24±0.08 (.009±.003) 0.10(.004) 2003 FUJITSU LIMITED F16013S-c-4-6 C Note Resin protrusion. (Each side : +0.15 (.006) Max). Note ...
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MB3775 FUJITSU LIMITED All Rights Reserved. The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information, such as descriptions of function and application circuit examples, in ...