cs5422 ON Semiconductor, cs5422 Datasheet
cs5422
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cs5422 Summary of contents
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... V ™ control method to achieve the fastest possible transient response and best overall regulation, while using the least number of external components. The CS5422 features out−of−phase synchronization between the channels, reducing the input filter requirement. The CS5422 also provides undervoltage lockout, Soft Start, built in adaptive FET non− ...
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Figure 1. Demonstration Circuit Schematic http://onsemi.com 2 ...
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ABSOLUTE MAXIMUM RATINGS* Operating Junction Temperature Storage Temperature Range ESD Susceptibility (Human Body Model) Package Thermal Resistance, SO−16: Junction−to−Case, R θJC Junction−to−Ambient, R θJA Package Thermal Resistance, SO−24L: Junction−to−Case, R θJC Junction−to−Ambient, R θJA Lead Temperature ...
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ELECTRICAL CHARACTERISTICS 10.8 V < V < 13.2 V; 10.8 V < BST < Characteristic Error Amplifier V Bias Current FB1(2) V Input Range FB1(2) COMP1,2 Source Current COMP1,2 Sink Current Reference Voltage 1(2) COMP1,2 Max ...
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ELECTRICAL CHARACTERISTICS (continued) 10.8 V < V < 13.2 V; 10.8 V < BST < Characteristic Supply Currents V Current CC BST Current Undervoltage Lockout Start Threshold Stop Threshold Hysteresis Hiccup Mode Overcurrent Protection OVC Comparator ...
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PACKAGE PIN DESCRIPTION PACKAGE PIN # SO−16 SO−24L − − − 5−8, 17− ...
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BIAS + − 8.6 V − 7.8 V IS+1 + − IS−1 − IS+2 − IS−2 − Set Dominant − 0.25 V − 5.0 μA ...
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... THEORY OF OPERATION The CS5422 is a dual power supply controller that utilizes 2 the V control method. Two synchronous V can be built using a single controller. The fixed−frequency architecture, driven from a common oscillator, ensures a 180° phase differential between channels Control Method 2 The V method of control uses a ramp signal that is generated by the ESR of the output capacitors ...
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PWM comparator terminates the initial pulse. 8.6 V 0.45 V UVLO STARTUP NORMAL OPERATION t S Figure 4. Idealized Waveforms Normal Operation During normal operation, the duty cycle of the gate drivers remains ...
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Figure 6. Hiccup Overcurrent Protection Output Enable On/Off control of the regulator outputs can be implemented by pulling the COMP pins low. The COMP pins must be driven below the 0.45 V PWM comparator offset voltage in order to disable ...
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R OSC (kW) Figure 8. Switching Frequency Selection of the Output Inductor The inductor should be selected based on its inductance, current capability, and DC resistance. Increasing the ...
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The voltage change during the load current transient is: ESL DV OUT + DI OUT ) ESR ) Dt where: / Δt = load current slew rate; ΔI OUT = load transient; ΔI OUT Δt = load transient duration time; ...
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... FET switching losses; SWL V = lower FET source−to−drain voltage load current; LOAD Non−overlap GATE(H)−to−GA TE(L) delay (from CS5422 data sheet Electrical Characteristics section switching frequency. SW The total power dissipation in the synchronous (lower) MOSFET can then be calculated as: where: P ...
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... Control IC Power Dissipation The power dissipation of the IC varies with the MOSFETs used and the CS5422 operating frequency. The CC average MOSFET gate charge current typically dominates the control IC power dissipation. The IC power dissipation is determined by the formula: P CONTROL(IC CC1 V CC1 ) I BST V BST ) P GATE(H)1 ...
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... CS5422−based regulator can be improved through the addition of a fixed amount of external slope compensation at the output of the PWM Error Amplifier (the COMP pin) during the regulator off−time. Referring to Figure 8, the amount of voltage ramp at the COMP pin is dependent on the gate voltage of the lower (synchronous) FET and the value of resistor divider formed by R1and R2 ...
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G K −T− SEATING PLANE 0.25 (0.010 −A− 24X 0.010 (0.25 −T− SEATING PLANE G 22X PACKAGE DIMENSIONS SO−16 D SUFFIX CASE ...
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... N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5773−3850 http://onsemi.com 17 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative CS5422/D ...