JAJSMF5 データシート

JAJSMF5B september 2022 – june 2023 TPS25990

PRODUCTION DATA

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）

RQP|26
- MPQF569A

サーマルパッド・メカニカル・データ

発注情報

8.3.14.10 DIRECT format Conversion

For telemetry and configuration parameters, the TPS25990 supports DIRECT format. Digital codes for telemetry or configuration parameters can be converted to their equivalent real world units using Equation 19 and Equation 20.

Interpreting received values:
The host system uses Equation 19 to convert the value received from the PMBus® device into a reading of V, A, °C, or W:
Equation 19. $X = \frac{1}{m} (Y \times 10^{- R} - b)$
Where:
- X, is the calculated, “real world” value in the appropriate units (V, A, °C, or W);
- m, the slope coefficient, is a two byte, two’s complement integer;
- Y, is a two byte two’s complement integer received from the PMBus® device;
- b, the offset, is a two byte, two’s complement integer; and
- R, the exponent, is a one byte, two’s complement integer.

Sending a value:
To send a value, the host must use Equation 20 to find the value of Y:
Equation 20. $Y = (m X + b) \times 10^{R}$
Where:
- Y is the two byte two’s complement integer to be sent to the unit;
- m, the slope coefficient, is the two byte, two’s complement integer;
- X, a “real world” value, in units such as V, A, °C, or W, to be converted for transmission;
- b, the offset, is the two byte, two’s complement integer; and
- R, the exponent, is the decimal value equivalent to the one byte, two’s complement integer.

Table 8-67 TPS25990 PMBus^® DIRECT format Conversion Guide

Parameter	Units	Zero Code Analog Value	Full scale Digital Code	Full-scale Analog Value	m	b	R
READ_VIN	V	0	0x3FF	19.48	5251	0	- 2
READ_VIN_PEAK	V	0	0x3FF	19.48	5251	0	- 2
READ_VIN_PEAK_EEPROM	V	0	0xFF	19.42	13128	0	- 3
READ_VIN_MIN	V	0	0x3FF	19.48	5251	0	- 2
READ_VIN_AVG	V	0	0x3FF	19.48	5251	0	- 2
VIN_UV_WARN	V	0	0xFF	19.42	13128	0	- 3
VIN_UV_FLT	V	0	0xFF	19.42	13128	0	- 3
VIN_OV_WARN	V	0	0xFF	19.42	13128	0	- 3
VIN_OV_FLT	V	2.95	0xF	17.72	10163	− 30081	- 4
READ_VOUT	V	0	0x3FF	19.48	5251	0	- 2
READ_VOUT_AVG	V	0	0x3FF	19.48	5251	0	- 2
READ_VOUT_MIN	V	0	0x3FF	19.48	5251	0	- 2
VOUT_UV_WARN	V	0	0xFF	19.42	13128	0	- 3
VOUT_PGTH	V	0	0xFF	19.42	13128	0	- 3
READ_IIN	A	0	0x3FF	107250/R_IMON	9.538 × R_IMON	0	- 3
READ_IIN_AVG	A	0	0x3FF	107250/R_IMON	9.538 × R_IMON	0	- 3
READ_IIN_PEAK	A	0	0x3FF	107250/R_IMON	9.538 × R_IMON	0	- 3
READ_IIN_PEAK_EEPROM	A	0	0xFF	107250/R_IMON	23.8 × R_IMON	0	- 4
IIN_OC_WARN	A	0	0xFF	107250/R_IMON	23.8 × R_IMON	0	- 4
READ_TEMPERATURE_1	°C	− 229.3	0x3FF	501.4	140	32100	- 2
READ_TEMP_AVG	°C	− 229.3	0x3FF	501.4	140	32100	- 2
READ_TEMP_PEAK	°C	− 229.3	0x3FF	501.4	140	32100	- 2
READ_TEMP_PEAK_EEPROM	°C	− 228.7	0xFF	499.8	35	8006	- 2
OT_WARN	°C	− 228.7	0xFF	499.8	35	8006	- 2
OT_FLT	°C	− 228.7	0xFF	499.8	35	8006	- 2
VAUX	V	0	0x3FF	1.95	5251	0	- 1
VAUX_AVG	V	0	0x3FF	1.95	5251	0	- 1
READ_PIN	W	0	0x3FF	2091375/R_IMON	4.901 × R_IMON	0	- 4
READ_PIN_PEAK	W	0	0x3FF	2091375/R_IMON	4.901 × R_IMON	0	- 4
READ_PIN_AVG	W	0	0x3FF	2091375/R_IMON	4.901 × R_IMON	0	- 4
PIN_OP_WARN	W	0	0xFF	2091375/R_IMON	12.217 × R_IMON	0	- 5
READ_EIN	J	0	0x7FFF	-	38.22 × R_IMON	0	- 7
VIREF	V	0.3	0x3F	1.186	7111	− 2133	- 2
GPDAC1	µA	6	0x3F	53.25	1333	− 8000	- 3
GPDAC2	V	0.3	0x3F	1.186	7111	− 2133	- 2
CMP2REF {VCMPXREF[7:4]}	V	0.2	0xF	1.7	10000	− 2000	- 3
CMP1REF {VCMPXREF[3:0]}	V	0.2	0xF	1.7	10000	− 2000	- 3
CABLE_VOLTAGE_DROP	V	0	0xFF	4.845	5263	0	- 2
READ_SAMPLE_BUF_VIN	V	0	0xFF	19.42	13128	0	- 3
READ_SAMPLE_BUF_VOUT	V	0	0xFF	19.42	13128	0	- 3
READ_SAMPLE_BUF_TEMP	°C	-228.7	0xFF	499.8	35	8006	- 2
READ_SAMPLE_BUF_VAUX	V	0	0xFF	1.94	13128	0	- 2
READ_SAMPLE_BUF_IIN	A	0	0xFF	107250/R_IMON	23.8 × R_IMON	0	- 4