MC13892VK Freescale Semiconductor, MC13892VK Datasheet - Page 101

• Manufacturer Part Number: MC13892VK
• Description: IC PMU I.MX51/37/35/27 139MAPBGA
• Manufacturer: Freescale Semiconductor

Specifications of MC13892VK

• Applications: Battery Management, Display (LED Drivers), Handheld/Mobile Devices, Power Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: *
• Output Current: 65 mA
• Output Voltage: 1.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

DEDICATED READINGS
CHANNEL 0 BATTERY VOLTAGE
input range of the ADC.
CHANNEL 1 BATTERY CURRENT
between BATT and BATTISNSCC. This function is enabled by setting BATTICON = 1.
voltage at BATT, and the voltage difference between BATT and BATTISNS, are sampled simultaneously but converted one after
the other. This is done to effectively perform the voltage and current reading at the same time. In multiple channel mode, the
converted values are read at the assigned channel. In single channel mode and ADA1[2:0] = 001, the converted result is
available in 4 pairs of battery voltage and current reading as shown in
Table 84. Battery Current Reading Sequence
Since battery current can flow in both directions, the conversion is read out in 2's complement format. Positive readings
correspond to the current flow out of the battery, and negative readings to the current flowing into the battery.
Analog Integrated Circuit Device Data
Freescale Semiconductor
Table 85. Battery Current Reading Coding
0 111 111 111
0 000 000 001
0 000 000 000
1 111 111 111
1 000 000 000
The battery voltage is read at the BATT pin at channel 0. The battery voltage is first scaled as V(BATT)/2 in order to fit the
The current flowing out of and into the battery can be read via the ADC, by monitoring the voltage drop over the sense resistor
The battery current can be read either in multiple channel mode or in single channel mode. In both cases, the battery terminal
If the BATTICON bit is not set, the ADC will return a 0 reading for channel 1.
The voltage difference between BATT and BATTISNS is first amplified to fit the ADC input range as V(BATT-BATTISNS)*20.
ADC Trigger
Conversion Code,
ADDn[9:0]
0
1
2
3
4
5
6
7
BATT, BATT – BATTISNSCC
-
BATT, BATT – BATTISNSCC
-
BATT, BATT – BATTISNSCC
-
BATT, BATT – BATTISNSCC
-
Signals Sampled
Voltage at Input, ADC in
Table 83. Battery Voltage Reading Coding
Conversion Code ADDn[9:0]
-1200.00
1200.00
-2.346
2.346
mV
0
1 111 111 111
1 000 010 100
0 000 000 000
BATT
BATT – BATTISNSCC
BATT
BATT – BATTISNSCC
BATT
BATT – BATTISNSCC
BATT
BATT – BATTISNSCC
BATT – BATTISNS in mV
Signal Converted
input ADC in V
-0.117
0.117
-60
Voltage at
60
0
2.400
1.250
0.000
Table
84.
Voltage at
BATT in V
4.800
2.500
0.000
Channel 0
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Readout
Current through
20 mOhm in mA
5.865
5.865
3000
3000
0
FUNCTIONAL DEVICE OPERATION
BATT
BATT – BATTISNSCC
BATT
BATT – BATTISNSCC
BATT
BATT – BATTISNSCC
BATT
BATT – BATTISNSCC
Contents
From battery
From battery
-
To battery
To battery
ADC SUBSYSTEM
Current Flow
13892
101