參數(shù)資料
型號： TPS65800RTQTG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 8-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56
封裝： 8 X 8 MM, GREEN, PLASTIC, QFN-56
文件頁數(shù)： 11/98頁
文件大小： 2077K
代理商： TPS65800RTQTG4
www.ti.com
SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007
PIN ASSIGNMENT (continued)
NAME
PIN
I/O
DESCRIPTION
EXTERNAL REQUIRED COMPONENTS
(SEE APPLICATION DIAGRAM)
HOT_RST
15
I/O
Hardware reset input, reset generated
Connect to an external push-button switch
when connected to ground
INT
19
O
Interruption pin, open-drain output
Connect 100-k
external pullup resistor between INT and OUT
INT pin is LO when interrupt is requested by TPS65800.
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-
H inductor to SM1 pin
stage output
L2
51
O
SM2 synchronous buck converter power
3.3-
H inductor to SM2 pin
stage output
L3
39
O
Drain of the integrated boost power stage
4.7-
H inductor to OUT pin, external Schottky diode to SM3
switch
pin
LDO0
32
O
LDO0 output, fixed voltage
1-
F (minimum) capacitor to AGND1
LDO1
37
O
LDO1 output
1-
F (minimum) capacitor to AGND1
LDO2
33
O
LDO2 output
1-
F (minimum) capacitor to AGND1
LDO3
28
O
LDO3 output
2.2-
F (minimum) capacitor to AGND2
LDO4
27
O
LDO4 output
2.2-
F (minimum) capacitor to AGND2
LDO35_REF
30
I
Linear regulators LDO3–5 reference filter
100-nF capacitor to AGND2
LDO5
26
O
LDO5 output
2.2-
F (minimum) capacitor to AGND2
LDO_PM
10
O
General-purpose LDO output
1-
F (minimum) capacitor to AGND1 pin
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-
F capacitor to AGND1 pin
main power rail (system power bus)
PGND1
45
–
SM1 synchronous buck converter power
Connect to power ground plane
ground
PGND2
52
–
SM1 synchronous buck converter power
Connect to power ground plane
ground
PGND3
38
–
White LED driver power ground input.
Connect to a power ground plane
PWM
34
O
PWM driver output, open-drain
Can be used to drive a vibrator or other external functions
RED
55
O
Programmable LED driver, open drain
Connect to RED input of RGB LED
output, current sink output when active.
RESPWRON
21
O
System reset, open-drain output
100-k
external pullup resistor to OUT. RESPWRON pin is LO
when TPS65800 is resetting the system.
RTC_OUT
4
O
Low-leakage LDO output. Can be
1-
F (minimum) capacitor to AGND1 pin or supercapacitor
connected to a super-capacitor or
secondary cell, if used as a RTC backup
output.
SCLK
2
I
I2C interface clock line
2-k
pullup resistor to OUT pin
SDAT
3
I/O
I2C interface data line
2-k
pullup resistor to OUT pin
SIM
5
O
General-purpose LDO output
1-
F (minimum) capacitor to AGND1 pin
SM1
44
I
SM1 synchronous buck converter output
LC filter: 10-
F capacitor to PGND1 pin
voltage sense
SM2
49
I
SM2 synchronous buck converter output
LC filter: 10-
F capacitor to PGND2 pin
voltage sense
SM3
42
I
White LED driver output overvoltage
Connect 1-
F capacitor to PGND3 pin. Connect SM3 pin to
detection
the positive side of white LED ladder.
SM3SW
40
I
Integrated white LED duty cycle switch
Connect to negative side of external LED ladder
input
SYS_IN
31
I
System power bus low-voltage detection
External resistive divider sets minimum system operational
voltage. TPS65800 enters sleep mode when voltage below
minimum system voltage threshold is detected. 1 nF filter
capacitor to AGND1 recommended.
19
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