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Rainbow Electronics MAX5970 User Manual

Page 23

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0V to 16V, Dual Hot-Swap Controller with 10-Bit

Current and Voltage Monitor and 4 LED Drivers

MAX5970

______________________________________________________________________________________ 23

Digital Voltage Monitoring and

Power-Good Outputs

The voltage at the load (MON_ inputs) is sampled by
the internal ADC. The MON_ full-scale voltage for each

channel can be set to 16V, 8V, 4V, or 2V by writing to
register mon_range. The default range is 16V (Tables
17 and 18).

Table 17. ADC Voltage Monitor Settings Register Format

Table 18. ADC Full-Scale Voltage Setting

Table 19. ADC Voltage Conversion Result Register Format (High-Order Bits)

Table 20. ADC Voltage Conversion Result Register Format (Low-Order Bits)

The most recent voltage conversion results can be read
from the adc_chx_mon_msb and adc_chx_mon_lsb reg-
isters (see Tables 19 and 20).

Description:

ADC voltage monitor full-scale range settings (for MON_ inputs)

Register Title:

mon_range

Register Addresses:

0x18

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

RESET

VALUE

MON2_rng1

MON2_rng0

MON1_rng1

MON1_rng0

0x00

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

MONx_rng1

MONx_rng0

ADC FULL-SCALE VOLTAGE (V)

0

0

16

0

1

8

1

0

4

1

1

2

Description:

Most recent voltage conversion result, high-order bits [9:2]

Register Title:

adc_ch0_mon_msb

adc_ch1_mon_msb

Register Addresses:

0x02

0x06

R

R

R

R

R

R

R

R

RESET

VALUE

vnew_9

vnew_8

vnew_7

vnew_6

vnew_5

vnew_4

vnew_3

vnew_2

0x00

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

Description:

Most recent voltage conversion result, low-order bits [1:0]

Register Title:

adc_ch0_mon_lsb

adc_ch1_mon_lsb

Register Addresses:

0x03

0x07

R

R

R

R

R

R

R

R

RESET

VALUE

vnew_1

vnew_0

0x00

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0