Datasheet

PIN DESCRIPTION, REQUIRED EXTERNAL COMPONENTS
TPS65820
SLVS663B – MAY 2006 – REVISED APRIL 2008 .............................................................................................................................................................. www.ti.com
NAME PIN I/O DESCRIPTION EXTERNAL REQUIRED COMPONENTS
(SEE APPLICATION DIAGRAM)
AC 7 I Adapter charge input voltage, connect to 1- µ F (minimum) capacitor to AGND1 pin to minimize
AC_DC adapter positive output terminal overvoltage transients during AC power hot-plug events.
(dc voltage)
ADC_REF 22 I/O ADC internal reference filter or ADC 4.7- µ F (minimum) to 10- µ F (maximum) capacitor connected to
external reference input AGND2 pin
AGND0 16 – Analog ground connection Connect to analog ground plane
AGND1 48 Analog ground pin Connect to analog ground plane
AGND2 25 Analog ground pin Connect to analog ground plane
ANLG1 24 I Analog input to ADC, programmable Can be used to monitor additional system or pack parameters
current source output
ANLG2 23 I Analog input to ADC, programmable Can be used to monitor additional system or pack parameters
current source output
BAT 17, I/O Battery power Connect to battery positive terminal. Connect 10- µ F capacitor
18 (minimum) from BAT pin to AGND1 pin
BLUE 1 O Programmable blue driver, open drain Connect to BLUE input of RGB LED
output, current sink output when active.
DPPM 14 I Dynamic power path management External resistor from DPPM pin to AGND1 pin sets the DPPM
set-point regulation threshold. 1 nF (minimum) capacitor to from DPPM
to AGND1 sets BAT to OUT short-circuit blanking delay when
battery is hot-plugged into system
FB3 41 I/O White LED duty cycle switch output, LED External resistor from FB3 pin to PGND3 pin sets LED peak
current setting current. Connect 100-pF (minimum) filter capacitor to PGND3
pin.
HOT_RST 15 I/O Hardware reset input, reset generated Connect to an external push-button switch
when connected to ground
GPIO1 43 I/O General purpose programmable I/O Example: External interrupt request to host ( INT: HI → LO)
GPIO2 53 I/O General purpose programmable I/O example: Set SM1 and SM2 converters in standby mode
GPIO3 54 I/O General purpose programmable I/O Example: ADC conversion start trigger
GREEN 56 O Programmable LED driver, open-drain Connect to GREEN input of RGB LED
output, current sink output when active
INT 19 O Interruption pin, open-drain output Connect 100-k Ω external pullup resistor between INT and
OUT. INT pin is LO when interrupt is requested by TPS65820.
ISET1 11 I Current set point when charging in auto External resistor from ISET1 pin to AGND1 pin sets charge
mode with AC selected. Precharge and current value
charge termination set point for all charge
modes
L1 46 O SM1 synchronous buck converter power 3.3- µ H inductor to SM1 pin
stage output
L2 51 O SM2 synchronous buck converter power 3.3- µ H inductor to SM2 pin
stage output
L3 39 O Drain of the integrated boost power stage 4.7- µ H inductor to OUT pin, external Schottky diode to SM3 pin
switch
LDO_PM 10 O General-purpose LDO output 1- µ F (minimum) capacitor to AGND1 pin
LDO0 32 O LDO0 output, fixed voltage 1- µ F (minimum) capacitor to AGND1
LDO1 37 O LDO1 output 1- µ F (minimum) capacitor to AGND1
LDO2 33 O LDO2 output 1- µ F (minimum) capacitor to AGND1
LDO3 28 O LDO3 output 2.2- µ F (minimum) capacitor to AGND2
LDO35_REF 30 I Linear regulators LDO3 – 5 reference filter 100-nF capacitor to AGND2
LDO4 27 O LDO4 output 2.2- µ F (minimum) capacitor to AGND2
LDO5 26 O LDO5 output 2.2- µ F (minimum) capacitor to AGND2
LED_PWM 36 O PWM driver output, open-drain Can be used to drive a keyboard backlight LED
OUT 8, 9 O Power path output. Connect to system 10- µ F capacitor to AGND1 pin
main power rail (system power bus)
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