PDF《用于电池供电系统的 TPS65217x 单芯片 PMIC》

4 3.3 (LDO,

400 mA)

4 3.3 (LDO,

400 mA)

4 5 TPS65217 www.ti.com.cn ZHCS688I CNOVEMBER 2011CREVISED MARCH

2018 Copyright ? 2011C2018, Texas Instruments Incorporated

6 Pin Configuration and Functions RSL Package 48-Pin VQFN With Exposed Thermal Pad Top View NC C No internal connection Pin Functions PIN I/O DESCRIPTION NAME NO. AC

10 I AC-adapter input to power path. Connect this pin to an external dc supply. AGND

41 ― Analog ground (GND). Connect the AGND pin to the ground plane. BAT 4,

5 I/O Battery charger output. Connect these pins to the battery. BAT_SENSE

6 I Battery-voltage sense input. Connect the BAT_SENSE pin to the BAT pin directly at the battery terminal. BYPASS

47 O Internal bias voltage (2.25 V). TI does not recommend connecting any external load to this pin. FB_WLED

38 I Feedback pin for the WLED boost converter. This pin is also connected to the anode of the WLED strings. INT_LDO

48 O Internal bias voltage (2.3 V). TI does not recommend connecting any external load to this pin. ISET1

35 I Low-level WLED current set. Connect this pin to a resistor to ground to set the WLED low-level current value. ISET2

36 I High-level WLED current set. Connect this pin to a resistor to ground to set the WLED high-level current value.

6 TPS65217 ZHCS688I CNOVEMBER 2011CREVISED MARCH

2018 www.ti.com.cn Copyright ? 2011C2018, Texas Instruments Incorporated Pin Functions (continued) PIN I/O DESCRIPTION NAME NO. ISINK1

34 I Input to the WLED current SINK1. Connect this pin to the cathode of the WLED string. Current through the SINK1 pin equals current through the ISINK2 pin. If only one WLED string is used, short the ISINK1 and ISINK2 pins together. ISINK2

33 I Input to the WLED current SINK2. Connect this pin to the cathode of the WLED string. Current through the SINK1 pin equals current through the ISINK2 ........