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BQ24095 Datasheet(PDF) 19 Page - Texas Instruments |
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BQ24095 Datasheet(HTML) 19 Page - Texas Instruments |
19 / 34 page Drive Logic VCC To ISET2 R1 R2 ToISET2 VCC Q1 Q2 Drive Logic R1Divider setto0.9V Whichisthe FloatVoltage OR 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 100 1000 10000 I - SET W I InternalClampRange OUT I Short Fault Range SET NonRestricted Operating Area I Programmed OUT min max bq24090, bq24091 bq24092, bq24093 bq24095 www.ti.com SLUS968D – JANUARY 2010 – REVISED DECEMBER 2012 Figure 22. Programmed/Clamped Out Current PRE_TERM – Pre-Charge and Termination Programmable Threshold Pre-Term is used to program both the pre-charge current and the termination current threshold. The pre-charge current level is a factor of two higher than the termination current level. The termination can be set between 5% and 50% of the programmed output current level set by ISET. If left floating the termination and pre-charge are set internally at 10/20% respectively. The pre-charge-to-fast-charge, Vlowv threshold is set to 2.5V. RPRE-TERM = %Term × KTERM = %Pre-CHG × KPRE-CHG (2) (2) Where: %Term is the percent of fast charge current where termination occurs; %Pre-CHG is the percent of fast charge current that is desired during precharge; KTERM and KPRE-CHG are gain factors found in the electrical specifications. ISET2 Is a 3-state input and programs the Input Current Limit/Regulation Threshold. A low will program a regulated fast charge current via the ISET resistor and is the maximum allowed input/output current for any ISET2 setting, Float will program a 100mA Current limit and High will program a 500mA Current limit. Below are two configurations for driving the 3-state ISET2 pin: Copyright © 2010–2012, Texas Instruments Incorporated Submit Documentation Feedback 19 Product Folder Links: bq24090 bq24091 bq24092 bq24093 bq24095 |
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