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BQ24038RHLTG4 Datasheet(PDF) 2 Page - Texas Instruments |
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BQ24038RHLTG4 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 38 page www.ti.com DESCRIPTION (CONTINUED) bq24030, bq24031, bq24032A bq24035, bq24038 SLUS618F – AUGUST 2004 – REVISED NOVEMBER 2006 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOSFET gates. The power select pin, PSEL, defines which input source is to be used first (primary source – AC or USB). If the primary source is not available, then the IC automatically switches over to the other secondary source if available or the battery as the last option. If the PSEL is set low, the USB input is selected first and if not available, the AC line is selected (if available) but programmed to a USB input limiting rate (100 mA/500 mA max). This feature allows the use of one input connector, where the host programs the PSEL pin according to what source is connected (AC adaptor or USB port). The bq24038 replaces USBPG with pin VBSEL, to enable user selection of the charge voltage. In addition, pin ACPG was modified to PG. PG is active low when either ac power or USB power is detected. The ISET1 pin programs the battery's fast charge constant current level with a resistor. During normal AC operation, the input supply provides power to both the OUT (System) and BAT pins. For peak or excessive loads (typically when operating from the USB power, PSEL = Low) that would cause the input source to enter current limit (or Q3 - USB FET limiting current) and its source and system voltage (OUT pin) to drop, the dynamic power-path management (DPPM) feature reduces the charging current attempting to prevent any further drop in system voltage. This feature allows the selection of a lower current rated adaptor based on the average load (ISYS-AVG + IBAT-PGM ) rather than a high peak transient load. ORDERING INFORMATION(1) BATTERY OUT PIN FOR AC PART PACKAGE TA VOLTAGE (V) INPUT CONDITIONS NUMBER(2)(3) MARKING 4.2 Regulated to 6 V(4) bq24030RHLR ANB 4.2 Regulated to 6 V(4) bq24030RHLT ANB 4.1 Regulated to 6 V(4) bq24031RHLR BZJ 4.1 Regulated to 6 V(4) bq24031RHLT BZJ 4.2 Regulated to 4.4 V(4) bq24032ARHLR BPE –40°C to 125°C 4.2 Regulated to 4.4 V(4) bq24032ARHLT BPE 4.2 Cutoff for AC overvoltage(5) bq24035RHLR ANA 4.2 Cutoff for AC overvoltage(5) bq24035RHLT ANA 4.2/4.36 Selectable Regulated to 4.4 V bq24038RHLR BOW 4.2/4.36 Selectable Regulated to 4.4 V bq24038RHLT BOW (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI Web site at www.ti.com. (2) The RHL package is available in the following options: R - taped and reeled in quantities of 3,000 devices per reel. T - taped and reeled in quantities of 250 devices per reel. (3) This product is RoHS compatible, including a lead concentration that does not exceed 0.1% of total product weight, and is suitable for use in specified lead-free soldering processes. In addition, this product uses package materials that do not contain halogens, including bromine (Br) or antimony (Sb) above 0.1% of total product weight. (4) If AC < VO(OUT-REG), the AC is connected to the OUT pin by a P-FET, (Q1). (5) If AC > V(CUT-OFF) the P-FET disconnects the OUT pin from the AC. 2 Submit Documentation Feedback |
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