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TPS54900PWR Fiches technique(PDF) 7 Page - Texas Instruments |
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TPS54900PWR Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 16 page TPS54900 SLVS405 – OCTOBER 2001 7 www.ti.com serial command bit assignments SERIAL BIT POSITION NAME DESCRIPTION 15 R/W Set to logic 1 to read from TPS54900, set to logic 0 to write to TPS54900 14 ADR2 Channel bank select, compared to logic state of CBS pin to select between two TPS54900 devices used in an 8-channel configuration 13 ADR1 Internal channel select MSB, used with ADR0 to select one of four output channels 12 ADR0 Internal channel select LSB, used with ADR1 to select one of four output channels 11 S3 Device address MSB (S3 = 1 required to address TPS54900) 10 S2 Device address bit (S2 = 1 required to address TPS54900) 9 S1 Device address bit (S1 = 1 required to address TPS54900) 8 S0 Device address LSB (S0 = 1 required to address TPS54900) 7 D7 Voltage programming MSB 6 D6 Voltage programming bit 5 D5 Voltage programming bit 4 D4 Voltage programming LSB 3 D3 Channel enable/disable (D3 = 0 enables channel(s)) 2 D2 Global start 1 D1 Unassigned 0 D0 Initialize counters valid commands WORD DESCRIPTION 00001111 00001001 Initialize PWM clocks with phase stagger and disable all channels 0ddd1111 vvvv0100 Turn on and regulate all channels to voltage code vvvv (see voltage programming code table) 0aaa1111 vvvv0000 Turn on and regulate channel aaa to voltage code vvvv (see voltage programming code table) 0aaa1111 dddd1000 Disable channel aaa 1aaa1111 dddddddd Read channel status from channel aaa NOTE: aaa: three bit channel address, 0aa: corresponds to CBS pin < VIL 1aa: corresponds to CBS > VIH vvvv: voltage programming code d: don’t care state voltage programming codes VOLTAGE CODE (D4–D7) Figure 1 VOLTAGE CODE (D4–D7) OUTPUT VOLTAGE 0 7.5 8 10.7 1 7.9 9 11.1 2 8.3 A 11.5 3 8.7 B 11.9 4 9.1 C 12.3 5 9.5 D 12.7 6 9.9 E 13.1 7 10.3 F Pass through mode |
Numéro de pièce similaire - TPS54900PWR |
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Description similaire - TPS54900PWR |
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