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ISL6173_06 Datasheet(数据表) 4 Page - Intersil Corporation |
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ISL6173 Datasheet(HTML) 4 Page - Intersil Corporation |
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4 page 
4 FN9186.3 January 3, 2006 11 CPQ- Charge Pump Capacitor Low Side Flying cap lowside. 12 BIAS Chip Bias Voltage Provides IC Bias. Should be 2V to 4V for IC to function normally. This pin can be powered from a supply voltage that is not being controlled. It is preferable to use 3.3V even if the channels being controlled are 2.5V or lower because more gate drive voltage will be available to the MOSFETs. 13 CPQ+ Charge Pump Capacitor High Side Flying cap highside. Use of 0.1µF for 2.5V bias and 0.022µF for 3.3V bias is recommended. 14 CPVDD Charge Pump Output This is the voltage used for some internal pullups and bias. Use of 0.47µF (minimum) is recommended. 15 CT2 Timer Capacitor Same function as pin 7 16 PG2 Power Good Output Same function as pin 6 17 FLT2 Fault Output Same as pin 5 18 GT2 Gate Drive Output Same as pin 4 19 SS2 Soft-Start Duration Set Input Same as pin 3 20 VO2 Output Voltage 2 Same as pin 2 21 SNS2 Current Sense Input Same as pin 1 22 VS2 Current Sense Reference Voltage input for one of the two voltages. Provides a 20µA current source for the ISET series resistor which sets the voltage to which the sense resistor IR drop is compared. 23 UV2 Undervoltage Monitor Input This pin is one of the two inputs to the undervoltage comparator. The other input is the 633mV reference. It is meant to sense the output voltage through a resistor divider. If the output voltage drops so that the voltage on the UV pin goes below 633mV, PG2 is deasserted. 24 EN2 Enable This is an active low input. When asserted (pulled low), the SS and gate drive are released and the output voltage gets enabled. When deasserted (pulled high or left floating), the reverse happens. 25 OCREF Ref. Current Adj. Allows adjustment of the reference current through RSET and the internal current regulation set resistor, thus setting the thresholds for CR, OC and WOC. 26 EN1 Enable Input Same as pin 24 27 UV1 Undervoltage Monitor Input Same as pin 23 28 VS1 Current Sense Reference Same as pin 22 Pin Descriptions (Continued) PIN NAME FUNCTION DESCRIPTION ISL6173 |
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