max5051auit Maxim Integrated Products, Inc., max5051auit Datasheet
max5051auit
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max5051auit Summary of contents
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Rev 0; 8/03 Parallelable, Clamped Two-Switch General Description The MAX5051 is a clamped, two-switch power-supply controller IC. This device can be used both in forward or flyback configurations with input voltage ranges from 11V to 76V. It provides comprehensive ...
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Parallelable, Clamped Two-Switch Power-Supply Controller IC ABSOLUTE MAXIMUM RATINGS AVIN, PVIN, XFRMRH to GND................................-0.3V to +80V BST to GND ............................................................-0.3V to +95V BST, DRVH to XFRMRH..........................................-0.3V to +12V REG9, DRVDD, DRVL to GND................................-0.3V to +12V DRVB, LXVDD, LXL, LXH to ...
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Parallelable, Clamped Two-Switch ELECTRICAL CHARACTERISTICS (continued) (AVIN = 12V, PVIN = 12V UVLO C = 4.7µ unless otherwise noted. Typical values are at T REG5 A MIN MAX ence outputs unconnected ...
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Parallelable, Clamped Two-Switch Power-Supply Controller IC ELECTRICAL CHARACTERISTICS (continued) (AVIN = 12V, PVIN = 12V UVLO STT C = 4.7µ unless otherwise noted. Typical values are at T REG5 A MIN ...
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Parallelable, Clamped Two-Switch ELECTRICAL CHARACTERISTICS (continued) (AVIN = 12V, PVIN = 12V UVLO C = 4.7µ unless otherwise noted. Typical values are at T REG5 A MIN MAX ence outputs unconnected ...
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Parallelable, Clamped Two-Switch Power-Supply Controller 12V 3V, V AVIN PVIN UVLO STT 4.7µ +25°C, unless otherwise noted.) A AVIN STANDBY CURRENT vs. AVIN SUPPLY VOLTAGE 300 ...
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Parallelable, Clamped Two-Switch ( 12V 3V, V AVIN PVIN UVLO STT 4.7µ +25°C, unless otherwise noted.) A REG5 OUTPUT VOLTAGE vs. TEMPERATURE 5.001 5.000 4.999 4.998 4.997 4.996 4.995 4.994 4.993 ...
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Parallelable, Clamped Two-Switch Power-Supply Controller 12V 3V, V AVIN PVIN UVLO STT 4.7µ +25°C, unless otherwise noted.) A CURRENT-LIMIT THRESHOLD vs. TEMPERATURE 170 165 160 155 150 145 140 ...
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Parallelable, Clamped Two-Switch ( 12V 3V, V AVIN PVIN UVLO STT 4.7µ +25°C, unless otherwise noted.) A CON TO DRVL PROPAGATION DELAY vs. TEMPERATURE 110 50mV OVERDRIVE 105 100 95 90 ...
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Parallelable, Clamped Two-Switch Power-Supply Controller IC PIN NAME Synchronous-Pulse Transformer Driver, PMOS Open Drain. LXH is the high-side driver for the secondary- side synchronous-pulse transformer. LXH can also drive a high-speed switching optocoupler. If not 13 LXH used, connect LXH ...
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Parallelable, Clamped Two-Switch 9V PVIN LDO REG9 OK 18R STT R 1.25V 1.125V UVLO 1.25V 1.125V INTERNAL INTERNAL SUPPLY AVIN REGULATOR 1.25V REFERENCE RCOSC OSC SYNCIN SYNCOUT RCFF 2.34V CPWM CON COMP FB 64µA E/A CSS SHDN GND ______________________________________________________________________________________ Power-Supply ...
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Parallelable, Clamped Two-Switch Power-Supply Controller IC Detailed Description The MAX5051 controller IC is designed for two-switch forward converter power-supply topologies. It incorpo- rates an advanced set of protection features that makes it uniquely suitable when high reliability and comprehensive fault ...
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Parallelable, Clamped Two-Switch V IN+ C11 0.1µF R12 1MΩ C12 220nF FLTINT GND RCOSC C13 STARTUP MAX5051 100pF RCFF C14 CON 390pF COMP R13 100kΩ R14 24.9kΩ R15 1MΩ R11 39.2kΩ V IN- Figure 2. Typical Application Circuit If the ...
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Parallelable, Clamped Two-Switch Power-Supply Controller IC diode is a high-voltage, small-signal Schottky type. It may be helpful to connect a resistor in series with this diode to minimize noise as well as reduce the peak charging currents any ...
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Parallelable, Clamped Two-Switch in control. Thus, the output-voltage slew rate is constant at light or heavy loads. Once the soft-start ends, the voltage on CSS regulates to 1.24V. Do not load CSS with external circuitry. A suitable range of capacitors ...
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Parallelable, Clamped Two-Switch Power-Supply Controller IC Normally PVIN is derived from a tertiary winding of the transformer. However, at startup there is no energy delivered through the transformer, hence, a special bootstrap sequence is required. Figure 6 shows the voltages ...
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Parallelable, Clamped Two-Switch Integrating Fault Protection The integrating fault protection feature allows transient overcurrent conditions to be ignored for a programmable amount of time, giving the power supply time to behave like a current source to the load. This can ...
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Parallelable, Clamped Two-Switch Power-Supply Controller IC Figure 8. Schematic of a 48V Input 3.3V at 15A Output Synchronously Rectified, Isolated Power Supply 18 ______________________________________________________________________________________ ...
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Parallelable, Clamped Two-Switch LOAD CURRENT (A) Figure 9. Efficiency at Nominal Output Voltage vs. Load Current 48V Nominal Input Voltage R = 0.22Ω L 4ms/div Figure ...
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Parallelable, Clamped Two-Switch Power-Supply Controller IC 2µs/div Figure 13. Output Voltage Ripple At Nominal Input Voltage and Full Load Current (Scope Bandwidth = 20MHz) Pin Configuration TOP VIEW RCOSC 1 SYNCOUT 2 RCFF 3 CON 4 CSS 5 MAX5051 COMP ...
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Parallelable, Clamped Two-Switch (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied ...