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TPS65020RHAR Datasheet(PDF) 32 Page - Texas Instruments |
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TPS65020RHAR Datasheet(HTML) 32 Page - Texas Instruments |
32 / 53 page ![]() 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 Submit Documentation Feedback Copyright © 2005–2016, Texas Instruments Incorporated Product Folder Links: TPS65020 |
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