WM8310GEB/V Wolfson Microelectronics, WM8310GEB/V Datasheet - Page 115

• Manufacturer Part Number: WM8310GEB/V
• Description: POWER MANAGEMENT SUBSYSTEM, 169BGA
• Manufacturer: Wolfson Microelectronics

Specifications of WM8310GEB/V

• Supply Voltage: 7V
• No. Of Step-down Dc - Dc Converters: 4
• No. Of Ldo Regulators: 11
• Digital Ic Case Style: BGA
• No. Of Pins: 169
• No. Of Regulated Outputs: 13
• Operating Temperature Range: -40°C To
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Pre-Production
w
The temperature monitoring circuit can be disabled by shorting NTCMON to LDO12VOUT. This is
only recommended if there is no NTC thermistor incorporated in the battery pack or if battery
temperature monitoring is provided by other methods. Note that the short between NTCMON and
LDO12VOUT is only sensed during start-up; the temperature monitoring circuit cannot be enabled /
disabled dynamically in the ON or SLEEP power states.
The battery temperature status bits are described in Table 63.
R16458
(404Ah)
Charger Status
Table 63 Battery Temperature Status
Battery temperature monitoring is configured as illustrated in Figure 27. The principle of operation is
that a temperature change in the battery pack causes a change in resistance of the NTC thermistor,
which results in a voltage change at the NTCMON pin.
Figure 27 Battery Temperature Monitoring
For information on how to set the hot and cold temperature limits, see the Applications Information in
Section 30.6.
ADDRESS
WM8310
Battery temperature
BIT
11
10
Battery monitor
measurement
Main battery
connection
source
BATT_HOT_ST
S
BATT_COLD_
STS
LABEL
NTCBIAS
NTCMON
BATTVDD
DEFAULT
GND
0
0
NTC bias resistor R
Battery Hot status
0 = Normal
1 = Battery Hot
Battery Cold status
0 = Normal
1 = Battery Cold
Single-cell
lithium battery
NTC thermistor R
V
NTCMON
PP, December 2009, Rev 3.0
=
DESCRIPTION
100k + R
BIAS
R
NTC
NTC
(100k)
NTC
(100k at 25 C)
WM8310
x V
NTCBIAS
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