參數(shù)資料
型號(hào): 71M6531D-IM/F
廠(chǎng)商: MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi): 電源管理
英文描述: 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC68
封裝: LEAD FREE, QFN-68
文件頁(yè)數(shù): 27/120頁(yè)
文件大?。?/td> 2477K
代理商: 71M6531D-IM/F
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Data Sheet 71M6531D/F-71M6532D/F
FDS 6531/6532 005
14
2005-2010 TERIDIAN Semiconductor Corporation
v1.3
the number of multiplexer frames in an accumulation interval is always even. Operation with
CHOP_E[1:0] = 00 does not require control of the chopping mechanism by the MPU while eliminating the
offset for temperature measurement.
In the second toggle state, CHOP_E[1:0] = 11, no ALT frame is forced during the last multiplexer cycle in
an accumulation interval and CROSS always toggles near the end of each multiplexer frame.
The internal bias voltage, VBIAS (typically 1.6 V), is used by the ADC when measuring the temperature
and battery monitor signals.
1.2.6
Temperature Sensor
The 71M6531D/F and 71M6532D/F include an on-chip temperature sensor implemented as a bandgap
reference. It is used to determine the die temperature. The MPU may request an alternate multiplexer
cycle containing the temperature sensor output by asserting MUX_ALT.
The primary use of the temperature data is to determine the magnitude of compensation required to offset
the thermal drift in the system (see Section 3.4 Temperature Compensation).
1.2.7
Battery Monitor
The battery voltage is measured by the ADC during alternative multiplexer frames if the BME (Battery
Measure Enable) bit in the I/O RAM is set. While BME is set, an on-chip 45 k
load resistor is applied to
the battery and a scaled fraction of the battery voltage is applied to the ADC input. After each alternative
MUX frame, the result of the ADC conversion is available at XRAM address 0x0B. BME is ignored and
assumed zero when system power is not available (V1 < VBIAS). See Section 5.4.4 Battery Monitor.
1.2.8
AFE Functional Description
The AFE functions as a data acquisition system, controlled by the MPU. The main signals (IA, VA, IB and
VB) are sampled, and the ADC counts obtained are stored in XRAM where they can be accessed by the
CE and, if necessary, by the MPU. Alternate multiplexer cycles are initiated less frequently by the MPU to
gather access to the slow temperature and battery signals.
Figure 5 shows the block diagram of the AFE, with current inputs shown only as differential pair of pins
(for the 71M6531D/F, the current input for phase A is a single pin [IA]).
Figure 5: AFE Block Diagram (Shown for the 71M6532D/F)
Σ ADC
CONVERTER
VREF
ADC_E
MUX
VREF
VBIAS
VREF
VREF_DIS
VBIAS
VREF_CAL
VBAT
VADC
MUX_DIV
MUX_ALT
EQU
22
FIR
FIR_LEN
VA
IBP
VB
IAP
IAN
IBN
TEMP
SENSOR
相關(guān)PDF資料
PDF描述
71M6531F-IMR/F 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC68
71M6531F-IM/F 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC68
71M6532D-IGTR/F 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP100
71M6531F-IM/F 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC68
71M6532F-IGT/F 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP100
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