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CS5305 Folha de dados(PDF) 10 Page - ON Semiconductor |
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CS5305 Folha de dados(HTML) 10 Page - ON Semiconductor |
10 / 33 page CS5305 http://onsemi.com 10 PACKAGE PIN DESCRIPTION Package Pin Number Pin Symbol Pin Name Function SO−28L 1 OCSET Over−Current Set Resistor divider from ROSC to GND programs the threshold of the hiccup over−current protection. 2 ROSC Oscillator Frequency Adjust Resistance to GND programs the oscillator frequency. It also programs the VFB bias current shown in Figure 5. 3 ENABL Enable Input TTL−Compatible logic input with 50 kΩ internal pull−up resistor to 3.3 V. A logic low puts the IC in FAULT mode. 4−6 CS1−3 Current Sense Inputs Non−inverting inputs to the current sense amplifiers. 7 CSREF Current Sense Reference Inverting input to the current sense amplifiers, and fast feedback input to the PWM comparator. 8 IFB Share Current Amp Inverting Input Inverting input to share current amp. Connect resistor divider between IOUT, IFB, and IC GND pin 28 to program Share Current Amp gain. 9 IOUT Share Current Amp Output Share current amplifier output and input to share adjust amplifier. 10 SHARE Share Bus Connect with other modules for single−wire current sharing. 11 SCOMP Share Compensation Connect compensation network to stabilize share loop. 12 VDRP Current Sense Output for AVP The offset of this pin above the DAC voltage is proportional to the output current. Connect a resistor from this pin to VFB to program the AVP voltage or leave this pin open for no AVP. 13 VFB Voltage Feedback Error Amp inverting input. Input bias current used to program AVP light load offset via resistor connected to converter output voltage. Short VFB to the converter output voltage for no AVP. 14 COMP Error Amp Output and PWM Comparator Input Provides loop compensation. Also used to control Softstart and Fault timing. 15 PWRGD Power Good Output Open collector output goes low when VFB is out of regulation. User must externally limit current into this pin to less than 20 mA. 16−20 VID4−VID0 Voltage ID DAC Inputs Programs Output Voltage. 50 kΩ internal pull−up resistors to 3.3 V. 21 PWRGDS Power Good Sense Provides remote output voltage sensing. 22 SGND Reference Ground Ground connection for the DAC. Provides remote sensing of ground at the load. 23 VCC Supply Input IC Power Supply Input. 24 DRVON Driver Enable Logic High enables outputs of compatible MOSFET Driver ICs. Low turns all MOSFETs OFF. Pin driven from internal 5.5 V; 70 kΩ internal resistor to GND. 25−27 GATE 3−1 FET Driver Outputs PWM Signal Input to external MOSFET Gate Driver ICs. 28 GND Ground IC Power Supply Return; connected to IC substrate. |
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