BQ25120A Datasheet, PDF (41/67 Pages) Texas Instruments – Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT

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bq25120A
SLUSD08 – MAY 2017
9.6.7 SYS VOUT Control Register
Memory location 0x06h, Reset State: 1010 1010 (bq25120A)
Figure 31. SYS VOUT Control Register
7 (MSB)
6
5
4
3
2
1
0 (LSB)
1
0
1
0
1
0
1
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 18. SYS VOUT Control Register
Bit Field
Type
Reset
Description
B7 (MSB) EN_SYS_OUT
R/W
1
0 – Disable SW
1 – Enable SW
(When disabled, output is pulled low)
B6
SYS_SEL1
B5
SYS_SEL0
R/W
0
R/W
1
00 – 1.1 V and 1.2 V selection
01 – 1.3 V through 2.8 V selection
10 – 1.5V through 2.75 V selection
11 – 1.8 V through 3.3 V selection
B4
SYS_VOUT_3
R/W
0
OUT Voltage: 800 mV step if SYS_SEL is 01 or 11
B3
SYS_VOUT_2
R/W
1
OUT Voltage: 400 mV step if SYS_SEL is 01 or 11
B2
SYS_VOUT_1
R/W
0
OUT Voltage: 200 mV step if SYS_SEL is 01 or 11
B1
SYS_VOUT_0
R/W
1
OUT Voltage: 100 mV step if SYS_SEL is 01 or 11
B0 (LSB)
0
SW_VOUT Bits: Use SYS_SEL and SYS_VOUT bits to set the output on SYS. The SYS voltage is calculated using the following equation:
See table below for all VOUT values that can be programmed through SYS_SEL and SYS_VOUT.
If SYS_SEL = 01, then SYS = 1.30 V + SYS_VOUTCODE x 100 mV.
If SYS_SEL = 11, then SYS = 1.80 V + SYS_VOUTCODE x 100 mV.
SYS_SEL
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
01
01
01
01
01
01
01
Copyright © 2017, Texas Instruments Incorporated
Table 19. SYS_SEL Codes
SYS_VOUT
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
0000
0001
0010
0011
0100
0101
0110
TYP
1.1
1.2
1.25
1.333
1.417
1.5
1.583
1.667
1.75
1.833
1.917
2
2.083
2.167
2.25
2.333
1.3
1.4
1.5
1.6
1.7
1.8
1.9
Product Folder Links: bq25120A
UNIT
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
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