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312-00012 Datasheet(PDF) 11 Page - Texas Instruments |
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312-00012 Datasheet(HTML) 11 Page - Texas Instruments |
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11 / 45 page  60.0 70.0 80.0 90.0 100.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 Output Power (W) Full Sync Mode Enabled 70.0 80.0 90.0 100.0 1.0 2.0 3.0 4.0 5.0 Output Power (W) bq51013A bq51014 www.ti.com SLUSAY6A – MARCH 2012 – REVISED JUNE 2012 PIN FUNCTIONS (continued) NAME YFP RHL I/O DESCRIPTION Programming pin for the over current limit. Connect external resistor to VSS. Size RILIM with the following equation: RILIM = 250 / IMAX where IMAX is the expected maximum output current of the wireless power supply. The hardware current limit (IILIM) will be 20% greater than IMAX ILIM G1 12 I/O or 1.2 x 1MAX. If the supply is meant to operate in current limit use RILIM = 300 / IILIM RILIM = R1 + 140 Connect this pin to the wired adapter input. When a voltage is applied to this pin wireless charging is disabled and AD_EN is driven low. Connect to GND through a 1 µF capacitor. If AD G4 9 I unused, capacitor is not required and should be grounded directly. For the bq51014, there is an OVP protection of 12.5 V. If the AD voltage is greater than 12.5 V, wireless charging will remain active. Push-pull driver for external PFET connecting AD and OUT. This node is pulled to the higher of OUT and AD when turning off the external FET. This voltage tracks approximately 4 V below AD-EN F3 8 O AD when voltage is present at AD and provides a regulated VSG bias for the external FET. Float this pin if unused. Must be connected to ground via a resistor. If an NTC function is not desired connect to GND with a 10 k Ω resistor. As a CTRL pin pull to ground to send end power transfer (EPT) fault to TS-CTRL F1 13 I the transmitter or pull-up to an internal rail (i.e. 1.8 V) to send EPT termination to the transmitter. Note that a 3-state driver should be used to interface this pin (see the 3-state Driver section for further description) EN1 G3 10 I Inputs that allow user to enable/disable wireless and wired charging <EN1 EN2>: <00> wireless charging is enabled unless AD voltage > 3.6 V <01> Dynamic communication current limit disabled EN2 G2 11 I <10> AD-EN pulled low, wireless charging disabled <11> wired and wireless charging disabled. Input that allows allows the upper termination threshold (ITERM-HI) to be programmable. KTERM = 200 Ω/%. Set the termination threshold by applying the following equation RTERM = %IMAX x TERM G3 10 I KTERM where %IMAX is the desired percentage of the maximum output current when termination should occur (i.e. 10% of 1 A = 0.1 mA) FOD F2 14 O Input for the rectified power measurement. Connect to GND with a 140 Ω resistor Open-drain output – active when output current is being delivered to the load (i.e. when the CHG F4 7 O output of the supply is enabled). Spacer TYPICAL CHARACTERISTICS Figure 4. Rectifier Efficiency Figure 5. IC Efficiency from AC Input to DC Output Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s): bq51013A bq51014 |
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