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TPS65020 Datasheet(PDF) 32 Page - Texas Instruments

Part # TPS65020
Description  Power Management IC
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
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TPS65020 Datasheet(HTML) 32 Page - Texas Instruments

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TPS65020
SLVS607D – SEPTEMBER 2005 – REVISED JANUARY 2016
www.ti.com
LDO1 Enable. This bit is logically AND’ed with the state of the LDO1_EN pin to turn on LDO1. Reset to
1 by a UVLO condition, the bit can be written to 0 or 1 through the serial interface. The bit is reset to 1
when the pin LDO_EN is pulled to GND, allowing LDO1 to turn on when LDO_EN returns high.
8.6.5 CON_CTRL Register Address: 04h (Read and Write), Default Value: B0h
The CON_CTRL register is used to force any or all of the converters into forced PWM operation, when low
output voltage ripple is vital. It is also used to control the phase shift between the three converters to minimize
the input rms current, hence reduce the required input blocking capacitance. The DCDC1 converter is taken as
the reference and consequently has a fixed zero phase shift.
Table 7. CON_CTRL Register
CON_CTRL
B7
B6
B5
B4
B3
B2
B1
B0
Bit name and
DCDC2
DCDC2
DCDC3
DCDC3
LOW
FPWM
FPWM
FPWM
function
PHASE1
PHASE0
PHASE1
PHASE0
RIPPLE
DCDC2
DCDC1
DCDC3
Default
1
0
1
1
0
0
0
0
Default value
UVLO
UVLO
UVLO
UVLO
UVLO
UVLO
UVLO
UVLO
loaded
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Table 8. DCDC2 and DCDC3 Phase Delay
DCDC2 CONVERTER
DCDC3 CONVERTER
CON_CTRL<7:6>
CON_CTRL<5:4>
DELAYED BY
DELAYED BY
00
zero
00
zero
01
1/4 cycle
01
1/4 cycle
10
1/2 cycle
10
1/2 cycle
11
3/4 cycle
11
3/4 cycle
Bit 3
LOW RIPPLE:
0 =
PFM mode operation optimized for high efficiency for all converters
1 =
PFM mode operation optimized for low-output voltage ripple for all converters
Bit 2
FPWM DCDC2:
0 =
DCDC2 converter operates in PWM / PFM mode
1 =
DCDC2 converter is forced into fixed-frequency PWM mode
Bit 1
FPWM DCDC1:
0 =
DCDC1 converter operates in PWM / PFM mode
1 =
DCDC1 converter is forced into fixed-frequency PWM mode
Bit 0
FPWM DCDC3:
0 =
DCDC3 converter operates in PWM / PFM mode
1 =
DCDC3 converter is forced into fixed-frequency PWM mode
32
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